# used for /metrics endpoint on LiteLLM Proxy
#### What this does ####
#    On success, log events to Prometheus
import asyncio
import os
import sys
from datetime import datetime, timedelta
from typing import (
    TYPE_CHECKING,
    Any,
    Awaitable,
    Callable,
    Dict,
    List,
    Literal,
    Optional,
    Tuple,
    Union,
    cast,
)

import litellm
from litellm._logging import print_verbose, verbose_logger
from litellm.integrations.custom_logger import CustomLogger
from litellm.litellm_core_utils.core_helpers import (
    get_litellm_metadata_from_kwargs,
    get_metadata_variable_name_from_kwargs,
)
from litellm.proxy._types import (
    LiteLLM_DeletedVerificationToken,
    LiteLLM_TeamTable,
    LiteLLM_UserTable,
    UserAPIKeyAuth,
)
from litellm.types.integrations.prometheus import *
from litellm.types.integrations.prometheus import (
    _sanitize_prometheus_label_name,
    _sanitize_prometheus_label_value,
)
from litellm.types.utils import StandardLoggingPayload

if TYPE_CHECKING:
    from apscheduler.schedulers.asyncio import AsyncIOScheduler
else:
    AsyncIOScheduler = Any

# Cached lazy import for get_end_user_id_for_cost_tracking
# Module-level cache to avoid repeated imports while preserving memory benefits
_get_end_user_id_for_cost_tracking = None


def _get_cached_end_user_id_for_cost_tracking():
    """
    Get cached get_end_user_id_for_cost_tracking function.
    Lazy imports on first call to avoid loading utils.py at import time (60MB saved).
    Subsequent calls use cached function for better performance.
    """
    global _get_end_user_id_for_cost_tracking
    if _get_end_user_id_for_cost_tracking is None:
        from litellm.utils import get_end_user_id_for_cost_tracking

        _get_end_user_id_for_cost_tracking = get_end_user_id_for_cost_tracking
    return _get_end_user_id_for_cost_tracking


class PrometheusLogger(CustomLogger):
    # Class variables or attributes
    def __init__(  # noqa: PLR0915
        self,
        **kwargs,
    ):
        try:
            from prometheus_client import Counter, Gauge, Histogram

            # Always initialize label_filters, even for non-premium users
            self.label_filters = self._parse_prometheus_config()

            # Create metric factory functions
            self._counter_factory = self._create_metric_factory(Counter)
            self._gauge_factory = self._create_metric_factory(Gauge)
            self._histogram_factory = self._create_metric_factory(Histogram)

            self.litellm_proxy_failed_requests_metric = self._counter_factory(
                name="litellm_proxy_failed_requests_metric",
                documentation="Total number of failed responses from proxy - the client did not get a success response from litellm proxy",
                labelnames=self.get_labels_for_metric(
                    "litellm_proxy_failed_requests_metric"
                ),
            )

            self.litellm_proxy_total_requests_metric = self._counter_factory(
                name="litellm_proxy_total_requests_metric",
                documentation="Total number of requests made to the proxy server - track number of client side requests",
                labelnames=self.get_labels_for_metric(
                    "litellm_proxy_total_requests_metric"
                ),
            )

            # request latency metrics
            self.litellm_request_total_latency_metric = self._histogram_factory(
                "litellm_request_total_latency_metric",
                "Total latency (seconds) for a request to LiteLLM",
                labelnames=self.get_labels_for_metric(
                    "litellm_request_total_latency_metric"
                ),
                buckets=LATENCY_BUCKETS,
            )

            self.litellm_llm_api_latency_metric = self._histogram_factory(
                "litellm_llm_api_latency_metric",
                "Total latency (seconds) for a models LLM API call",
                labelnames=self.get_labels_for_metric("litellm_llm_api_latency_metric"),
                buckets=LATENCY_BUCKETS,
            )

            self.litellm_llm_api_time_to_first_token_metric = self._histogram_factory(
                "litellm_llm_api_time_to_first_token_metric",
                "Time to first token for a models LLM API call",
                # labelnames=[
                #     "model",
                #     "hashed_api_key",
                #     "api_key_alias",
                #     "team",
                #     "team_alias",
                # ],
                labelnames=self.get_labels_for_metric(
                    "litellm_llm_api_time_to_first_token_metric"
                ),
                buckets=LATENCY_BUCKETS,
            )

            # Counter for spend
            self.litellm_spend_metric = self._counter_factory(
                "litellm_spend_metric",
                "Total spend on LLM requests",
                labelnames=self.get_labels_for_metric("litellm_spend_metric"),
            )

            # Counter for total_output_tokens
            self.litellm_tokens_metric = self._counter_factory(
                "litellm_total_tokens_metric",
                "Total number of input + output tokens from LLM requests",
                labelnames=self.get_labels_for_metric("litellm_total_tokens_metric"),
            )

            self.litellm_input_tokens_metric = self._counter_factory(
                "litellm_input_tokens_metric",
                "Total number of input tokens from LLM requests",
                labelnames=self.get_labels_for_metric("litellm_input_tokens_metric"),
            )

            self.litellm_output_tokens_metric = self._counter_factory(
                "litellm_output_tokens_metric",
                "Total number of output tokens from LLM requests",
                labelnames=self.get_labels_for_metric("litellm_output_tokens_metric"),
            )

            # Remaining Budget for Team
            self.litellm_remaining_team_budget_metric = self._gauge_factory(
                "litellm_remaining_team_budget_metric",
                "Remaining budget for team",
                labelnames=self.get_labels_for_metric(
                    "litellm_remaining_team_budget_metric"
                ),
            )

            # Max Budget for Team
            self.litellm_team_max_budget_metric = self._gauge_factory(
                "litellm_team_max_budget_metric",
                "Maximum budget set for team",
                labelnames=self.get_labels_for_metric("litellm_team_max_budget_metric"),
            )

            # Team Budget Reset At
            self.litellm_team_budget_remaining_hours_metric = self._gauge_factory(
                "litellm_team_budget_remaining_hours_metric",
                "Remaining days for team budget to be reset",
                labelnames=self.get_labels_for_metric(
                    "litellm_team_budget_remaining_hours_metric"
                ),
            )

            # Remaining Budget for API Key
            self.litellm_remaining_api_key_budget_metric = self._gauge_factory(
                "litellm_remaining_api_key_budget_metric",
                "Remaining budget for api key",
                labelnames=self.get_labels_for_metric(
                    "litellm_remaining_api_key_budget_metric"
                ),
            )

            # Max Budget for API Key
            self.litellm_api_key_max_budget_metric = self._gauge_factory(
                "litellm_api_key_max_budget_metric",
                "Maximum budget set for api key",
                labelnames=self.get_labels_for_metric(
                    "litellm_api_key_max_budget_metric"
                ),
            )

            self.litellm_api_key_budget_remaining_hours_metric = self._gauge_factory(
                "litellm_api_key_budget_remaining_hours_metric",
                "Remaining hours for api key budget to be reset",
                labelnames=self.get_labels_for_metric(
                    "litellm_api_key_budget_remaining_hours_metric"
                ),
            )

            # Remaining Budget for User
            self.litellm_remaining_user_budget_metric = self._gauge_factory(
                "litellm_remaining_user_budget_metric",
                "Remaining budget for user",
                labelnames=self.get_labels_for_metric(
                    "litellm_remaining_user_budget_metric"
                ),
            )

            # Max Budget for User
            self.litellm_user_max_budget_metric = self._gauge_factory(
                "litellm_user_max_budget_metric",
                "Maximum budget set for user",
                labelnames=self.get_labels_for_metric("litellm_user_max_budget_metric"),
            )

            self.litellm_user_budget_remaining_hours_metric = self._gauge_factory(
                "litellm_user_budget_remaining_hours_metric",
                "Remaining hours for user budget to be reset",
                labelnames=self.get_labels_for_metric(
                    "litellm_user_budget_remaining_hours_metric"
                ),
            )

            ########################################
            # LiteLLM Virtual API KEY metrics
            ########################################
            # Remaining MODEL RPM limit for API Key
            self.litellm_remaining_api_key_requests_for_model = self._gauge_factory(
                "litellm_remaining_api_key_requests_for_model",
                "Remaining Requests API Key can make for model (model based rpm limit on key)",
                labelnames=self.get_labels_for_metric(
                    "litellm_remaining_api_key_requests_for_model"
                ),
            )

            # Remaining MODEL TPM limit for API Key
            self.litellm_remaining_api_key_tokens_for_model = self._gauge_factory(
                "litellm_remaining_api_key_tokens_for_model",
                "Remaining Tokens API Key can make for model (model based tpm limit on key)",
                labelnames=self.get_labels_for_metric(
                    "litellm_remaining_api_key_tokens_for_model"
                ),
            )

            ########################################
            # LLM API Deployment Metrics / analytics
            ########################################

            # Remaining Rate Limit for model
            self.litellm_remaining_requests_metric = self._gauge_factory(
                "litellm_remaining_requests_metric",
                "LLM Deployment Analytics - remaining requests for model, returned from LLM API Provider",
                labelnames=self.get_labels_for_metric(
                    "litellm_remaining_requests_metric"
                ),
            )

            self.litellm_remaining_tokens_metric = self._gauge_factory(
                "litellm_remaining_tokens_metric",
                "remaining tokens for model, returned from LLM API Provider",
                labelnames=self.get_labels_for_metric(
                    "litellm_remaining_tokens_metric"
                ),
            )

            self.litellm_overhead_latency_metric = self._histogram_factory(
                "litellm_overhead_latency_metric",
                "Latency overhead (milliseconds) added by LiteLLM processing",
                labelnames=self.get_labels_for_metric(
                    "litellm_overhead_latency_metric"
                ),
                buckets=LATENCY_BUCKETS,
            )

            # Request queue time metric
            self.litellm_request_queue_time_metric = self._histogram_factory(
                "litellm_request_queue_time_seconds",
                "Time spent in request queue before processing starts (seconds)",
                labelnames=self.get_labels_for_metric(
                    "litellm_request_queue_time_seconds"
                ),
                buckets=LATENCY_BUCKETS,
            )

            # Guardrail metrics
            self.litellm_guardrail_latency_metric = self._histogram_factory(
                "litellm_guardrail_latency_seconds",
                "Latency (seconds) for guardrail execution",
                labelnames=["guardrail_name", "status", "error_type", "hook_type"],
                buckets=LATENCY_BUCKETS,
            )

            self.litellm_guardrail_errors_total = self._counter_factory(
                "litellm_guardrail_errors_total",
                "Total number of errors encountered during guardrail execution",
                labelnames=["guardrail_name", "error_type", "hook_type"],
            )

            self.litellm_guardrail_requests_total = self._counter_factory(
                "litellm_guardrail_requests_total",
                "Total number of guardrail invocations",
                labelnames=["guardrail_name", "status", "hook_type"],
            )
            # llm api provider budget metrics
            self.litellm_provider_remaining_budget_metric = self._gauge_factory(
                "litellm_provider_remaining_budget_metric",
                "Remaining budget for provider - used when you set provider budget limits",
                labelnames=["api_provider"],
            )

            # Metric for deployment state
            self.litellm_deployment_state = self._gauge_factory(
                "litellm_deployment_state",
                "LLM Deployment Analytics - The state of the deployment: 0 = healthy, 1 = partial outage, 2 = complete outage",
                labelnames=self.get_labels_for_metric("litellm_deployment_state"),
            )

            self.litellm_deployment_tpm_limit = self._gauge_factory(
                "litellm_deployment_tpm_limit",
                "Deployment TPM limit found in config",
                labelnames=self.get_labels_for_metric("litellm_deployment_tpm_limit"),
            )

            self.litellm_deployment_rpm_limit = self._gauge_factory(
                "litellm_deployment_rpm_limit",
                "Deployment RPM limit found in config",
                labelnames=self.get_labels_for_metric("litellm_deployment_rpm_limit"),
            )

            self.litellm_deployment_cooled_down = self._counter_factory(
                "litellm_deployment_cooled_down",
                "LLM Deployment Analytics - Number of times a deployment has been cooled down by LiteLLM load balancing logic. exception_status is the status of the exception that caused the deployment to be cooled down",
                # labelnames=_logged_llm_labels + [EXCEPTION_STATUS],
                labelnames=self.get_labels_for_metric("litellm_deployment_cooled_down"),
            )

            self.litellm_deployment_success_responses = self._counter_factory(
                name="litellm_deployment_success_responses",
                documentation="LLM Deployment Analytics - Total number of successful LLM API calls via litellm",
                labelnames=self.get_labels_for_metric(
                    "litellm_deployment_success_responses"
                ),
            )
            self.litellm_deployment_failure_responses = self._counter_factory(
                name="litellm_deployment_failure_responses",
                documentation="LLM Deployment Analytics - Total number of failed LLM API calls for a specific LLM deploymeny. exception_status is the status of the exception from the llm api",
                labelnames=self.get_labels_for_metric(
                    "litellm_deployment_failure_responses"
                ),
            )

            self.litellm_deployment_total_requests = self._counter_factory(
                name="litellm_deployment_total_requests",
                documentation="LLM Deployment Analytics - Total number of LLM API calls via litellm - success + failure",
                labelnames=self.get_labels_for_metric(
                    "litellm_deployment_total_requests"
                ),
            )

            # Deployment Latency tracking
            self.litellm_deployment_latency_per_output_token = self._histogram_factory(
                name="litellm_deployment_latency_per_output_token",
                documentation="LLM Deployment Analytics - Latency per output token",
                labelnames=self.get_labels_for_metric(
                    "litellm_deployment_latency_per_output_token"
                ),
            )

            self.litellm_deployment_successful_fallbacks = self._counter_factory(
                "litellm_deployment_successful_fallbacks",
                "LLM Deployment Analytics - Number of successful fallback requests from primary model -> fallback model",
                self.get_labels_for_metric("litellm_deployment_successful_fallbacks"),
            )

            self.litellm_deployment_failed_fallbacks = self._counter_factory(
                "litellm_deployment_failed_fallbacks",
                "LLM Deployment Analytics - Number of failed fallback requests from primary model -> fallback model",
                self.get_labels_for_metric("litellm_deployment_failed_fallbacks"),
            )

            # Callback Logging Failure Metrics
            self.litellm_callback_logging_failures_metric = self._counter_factory(
                name="litellm_callback_logging_failures_metric",
                documentation="Total number of failures when emitting logs to callbacks (e.g. s3_v2, langfuse, etc)",
                labelnames=["callback_name"],
            )

            self.litellm_llm_api_failed_requests_metric = self._counter_factory(
                name="litellm_llm_api_failed_requests_metric",
                documentation="deprecated - use litellm_proxy_failed_requests_metric",
                labelnames=self.get_labels_for_metric(
                    "litellm_llm_api_failed_requests_metric"
                ),
            )

            self.litellm_requests_metric = self._counter_factory(
                name="litellm_requests_metric",
                documentation="deprecated - use litellm_proxy_total_requests_metric. Total number of LLM calls to litellm - track total per API Key, team, user",
                labelnames=self.get_labels_for_metric("litellm_requests_metric"),
            )

            # Cache metrics
            self.litellm_cache_hits_metric = self._counter_factory(
                name="litellm_cache_hits_metric",
                documentation="Total number of LiteLLM cache hits",
                labelnames=self.get_labels_for_metric("litellm_cache_hits_metric"),
            )

            self.litellm_cache_misses_metric = self._counter_factory(
                name="litellm_cache_misses_metric",
                documentation="Total number of LiteLLM cache misses",
                labelnames=self.get_labels_for_metric("litellm_cache_misses_metric"),
            )

            self.litellm_cached_tokens_metric = self._counter_factory(
                name="litellm_cached_tokens_metric",
                documentation="Total tokens served from LiteLLM cache",
                labelnames=self.get_labels_for_metric("litellm_cached_tokens_metric"),
            )

            # User and Team count metrics
            self.litellm_total_users_metric = self._gauge_factory(
                "litellm_total_users",
                "Total number of users in LiteLLM",
                labelnames=[],
            )

            self.litellm_teams_count_metric = self._gauge_factory(
                "litellm_teams_count",
                "Total number of teams in LiteLLM",
                labelnames=[],
            )

        except Exception as e:
            print_verbose(f"Got exception on init prometheus client {str(e)}")
            raise e

    def _parse_prometheus_config(self) -> Dict[str, List[str]]:
        """Parse prometheus metrics configuration for label filtering and enabled metrics"""
        import litellm
        from litellm.types.integrations.prometheus import PrometheusMetricsConfig

        config = litellm.prometheus_metrics_config

        # If no config is provided, return empty dict (no filtering)
        if not config:
            return {}

        verbose_logger.debug(f"prometheus config: {config}")

        # Parse and validate all configuration groups
        parsed_configs = []
        self.enabled_metrics = set()

        for group_config in config:
            # Validate configuration using Pydantic
            if isinstance(group_config, dict):
                parsed_config = PrometheusMetricsConfig(**group_config)
            else:
                parsed_config = group_config

            parsed_configs.append(parsed_config)
            self.enabled_metrics.update(parsed_config.metrics)

        # Validate all configurations
        validation_results = self._validate_all_configurations(parsed_configs)

        if validation_results.has_errors:
            self._pretty_print_validation_errors(validation_results)
            error_message = "Configuration validation failed:\n" + "\n".join(
                validation_results.all_error_messages
            )
            raise ValueError(error_message)

        # Build label filters from valid configurations
        label_filters = self._build_label_filters(parsed_configs)

        # Pretty print the processed configuration
        self._pretty_print_prometheus_config(label_filters)
        return label_filters

    def _validate_all_configurations(self, parsed_configs: List) -> ValidationResults:
        """Validate all metric configurations and return collected errors"""
        metric_errors = []
        label_errors = []

        for config in parsed_configs:
            for metric_name in config.metrics:
                # Validate metric name
                metric_error = self._validate_single_metric_name(metric_name)
                if metric_error:
                    metric_errors.append(metric_error)
                    continue  # Skip label validation if metric name is invalid

                # Validate labels if provided
                if config.include_labels:
                    label_error = self._validate_single_metric_labels(
                        metric_name, config.include_labels
                    )
                    if label_error:
                        label_errors.append(label_error)

        return ValidationResults(metric_errors=metric_errors, label_errors=label_errors)

    def _validate_single_metric_name(
        self, metric_name: str
    ) -> Optional[MetricValidationError]:
        """Validate a single metric name"""
        from typing import get_args

        if metric_name not in set(get_args(DEFINED_PROMETHEUS_METRICS)):
            return MetricValidationError(
                metric_name=metric_name,
                valid_metrics=get_args(DEFINED_PROMETHEUS_METRICS),
            )
        return None

    def _validate_single_metric_labels(
        self, metric_name: str, labels: List[str]
    ) -> Optional[LabelValidationError]:
        """Validate labels for a single metric"""
        from typing import cast

        # Get valid labels for this metric from PrometheusMetricLabels
        valid_labels = PrometheusMetricLabels.get_labels(
            cast(DEFINED_PROMETHEUS_METRICS, metric_name)
        )

        # Find invalid labels
        invalid_labels = [label for label in labels if label not in valid_labels]

        if invalid_labels:
            return LabelValidationError(
                metric_name=metric_name,
                invalid_labels=invalid_labels,
                valid_labels=valid_labels,
            )
        return None

    def _build_label_filters(self, parsed_configs: List) -> Dict[str, List[str]]:
        """Build label filters from validated configurations"""
        label_filters = {}

        for config in parsed_configs:
            for metric_name in config.metrics:
                if config.include_labels:
                    # Only add if metric name is valid (validation already passed)
                    if self._validate_single_metric_name(metric_name) is None:
                        label_filters[metric_name] = config.include_labels

        return label_filters

    def _validate_configured_metric_labels(self, metric_name: str, labels: List[str]):
        """
        Ensure that all the configured labels are valid for the metric

        Raises ValueError if the metric labels are invalid and pretty prints the error
        """
        label_error = self._validate_single_metric_labels(metric_name, labels)
        if label_error:
            self._pretty_print_invalid_labels_error(
                metric_name=label_error.metric_name,
                invalid_labels=label_error.invalid_labels,
                valid_labels=label_error.valid_labels,
            )
            raise ValueError(label_error.message)

        return True

    #########################################################
    # Pretty print functions
    #########################################################

    def _pretty_print_validation_errors(
        self, validation_results: ValidationResults
    ) -> None:
        """Pretty print all validation errors using rich"""
        try:
            from rich.console import Console
            from rich.panel import Panel
            from rich.table import Table
            from rich.text import Text

            console = Console()

            # Create error panel title
            title = Text("🚨🚨 Configuration Validation Errors", style="bold red")

            # Print main error panel
            console.print("\n")
            console.print(Panel(title, border_style="red"))

            # Show invalid metric names if any
            if validation_results.metric_errors:
                invalid_metrics = [
                    e.metric_name for e in validation_results.metric_errors
                ]
                valid_metrics = validation_results.metric_errors[
                    0
                ].valid_metrics  # All should have same valid metrics

                metrics_error_text = Text(
                    f"Invalid Metric Names: {', '.join(invalid_metrics)}",
                    style="bold red",
                )
                console.print(Panel(metrics_error_text, border_style="red"))

                metrics_table = Table(
                    title="📊 Valid Metric Names",
                    show_header=True,
                    header_style="bold green",
                    title_justify="left",
                    border_style="green",
                )
                metrics_table.add_column(
                    "Available Metrics", style="cyan", no_wrap=True
                )

                for metric in sorted(valid_metrics):
                    metrics_table.add_row(metric)

                console.print(metrics_table)

            # Show invalid labels if any
            if validation_results.label_errors:
                for error in validation_results.label_errors:
                    labels_error_text = Text(
                        f"Invalid Labels for '{error.metric_name}': {', '.join(error.invalid_labels)}",
                        style="bold red",
                    )
                    console.print(Panel(labels_error_text, border_style="red"))

                    labels_table = Table(
                        title=f"🏷️ Valid Labels for '{error.metric_name}'",
                        show_header=True,
                        header_style="bold green",
                        title_justify="left",
                        border_style="green",
                    )
                    labels_table.add_column("Valid Labels", style="cyan", no_wrap=True)

                    for label in sorted(error.valid_labels):
                        labels_table.add_row(label)

                    console.print(labels_table)

            console.print("\n")

        except ImportError:
            # Fallback to simple logging if rich is not available
            for metric_error in validation_results.metric_errors:
                verbose_logger.error(metric_error.message)
            for label_error in validation_results.label_errors:
                verbose_logger.error(label_error.message)

    def _pretty_print_invalid_labels_error(
        self, metric_name: str, invalid_labels: List[str], valid_labels: List[str]
    ) -> None:
        """Pretty print error message for invalid labels using rich"""
        try:
            from rich.console import Console
            from rich.panel import Panel
            from rich.table import Table
            from rich.text import Text

            console = Console()

            # Create error panel title
            title = Text(
                f"🚨🚨 Invalid Labels for Metric: '{metric_name}'\nInvalid labels: {', '.join(invalid_labels)}\nPlease specify only valid labels below",
                style="bold red",
            )

            # Create valid labels table
            labels_table = Table(
                title="🏷️ Valid Labels for this Metric",
                show_header=True,
                header_style="bold green",
                title_justify="left",
                border_style="green",
            )
            labels_table.add_column("Valid Labels", style="cyan", no_wrap=True)

            for label in sorted(valid_labels):
                labels_table.add_row(label)

            # Print everything in a nice panel
            console.print("\n")
            console.print(Panel(title, border_style="red"))
            console.print(labels_table)
            console.print("\n")

        except ImportError:
            # Fallback to simple logging if rich is not available
            verbose_logger.error(
                f"Invalid labels for metric '{metric_name}': {invalid_labels}. Valid labels: {sorted(valid_labels)}"
            )

    def _pretty_print_invalid_metric_error(
        self, invalid_metric_name: str, valid_metrics: tuple
    ) -> None:
        """Pretty print error message for invalid metric name using rich"""
        try:
            from rich.console import Console
            from rich.panel import Panel
            from rich.table import Table
            from rich.text import Text

            console = Console()

            # Create error panel title
            title = Text(
                f"🚨🚨 Invalid Metric Name: '{invalid_metric_name}'\nPlease specify one of the allowed metrics below",
                style="bold red",
            )

            # Create valid metrics table
            metrics_table = Table(
                title="📊 Valid Metric Names",
                show_header=True,
                header_style="bold green",
                title_justify="left",
                border_style="green",
            )
            metrics_table.add_column("Available Metrics", style="cyan", no_wrap=True)

            for metric in sorted(valid_metrics):
                metrics_table.add_row(metric)

            # Print everything in a nice panel
            console.print("\n")
            console.print(Panel(title, border_style="red"))
            console.print(metrics_table)
            console.print("\n")

        except ImportError:
            # Fallback to simple logging if rich is not available
            verbose_logger.error(
                f"Invalid metric name: {invalid_metric_name}. Valid metrics: {sorted(valid_metrics)}"
            )

    #########################################################
    # End of pretty print functions
    #########################################################

    def _valid_metric_name(self, metric_name: str):
        """
        Raises ValueError if the metric name is invalid and pretty prints the error
        """
        error = self._validate_single_metric_name(metric_name)
        if error:
            self._pretty_print_invalid_metric_error(
                invalid_metric_name=error.metric_name, valid_metrics=error.valid_metrics
            )
            raise ValueError(error.message)

    def _pretty_print_prometheus_config(
        self, label_filters: Dict[str, List[str]]
    ) -> None:
        """Pretty print the processed prometheus configuration using rich"""
        try:
            from rich.console import Console
            from rich.panel import Panel
            from rich.table import Table
            from rich.text import Text

            console = Console()

            # Create main panel title
            title = Text("Prometheus Configuration Processed", style="bold blue")

            # Create enabled metrics table
            metrics_table = Table(
                title="📊 Enabled Metrics",
                show_header=True,
                header_style="bold magenta",
                title_justify="left",
            )
            metrics_table.add_column("Metric Name", style="cyan", no_wrap=True)

            if hasattr(self, "enabled_metrics") and self.enabled_metrics:
                for metric in sorted(self.enabled_metrics):
                    metrics_table.add_row(metric)
            else:
                metrics_table.add_row(
                    "[yellow]All metrics enabled (no filter applied)[/yellow]"
                )

            # Create label filters table
            labels_table = Table(
                title="🏷️  Label Filters",
                show_header=True,
                header_style="bold green",
                title_justify="left",
            )
            labels_table.add_column("Metric Name", style="cyan", no_wrap=True)
            labels_table.add_column("Allowed Labels", style="yellow")

            if label_filters:
                for metric_name, labels in sorted(label_filters.items()):
                    labels_str = (
                        ", ".join(labels)
                        if labels
                        else "[dim]No labels specified[/dim]"
                    )
                    labels_table.add_row(metric_name, labels_str)
            else:
                labels_table.add_row(
                    "[yellow]No label filtering applied[/yellow]",
                    "[dim]All default labels will be used[/dim]",
                )

            # Print everything in a nice panel
            console.print("\n")
            console.print(Panel(title, border_style="blue"))
            console.print(metrics_table)
            console.print(labels_table)
            console.print("\n")

        except ImportError:
            # Fallback to simple logging if rich is not available
            verbose_logger.info(
                f"Enabled metrics: {sorted(self.enabled_metrics) if hasattr(self, 'enabled_metrics') else 'All metrics'}"
            )
            verbose_logger.info(f"Label filters: {label_filters}")

    def _is_metric_enabled(self, metric_name: str) -> bool:
        """Check if a metric is enabled based on configuration"""
        # If no specific configuration is provided, enable all metrics (default behavior)
        if not hasattr(self, "enabled_metrics"):
            return True

        # If enabled_metrics is empty, enable all metrics
        if not self.enabled_metrics:
            return True

        return metric_name in self.enabled_metrics

    def _create_metric_factory(self, metric_class):
        """Create a factory function that returns either a real metric or a no-op metric"""

        def factory(*args, **kwargs):
            # Extract metric name from the first argument or 'name' keyword argument
            metric_name = args[0] if args else kwargs.get("name", "")

            if self._is_metric_enabled(metric_name):
                return metric_class(*args, **kwargs)
            else:
                return NoOpMetric()

        return factory

    def get_labels_for_metric(
        self, metric_name: DEFINED_PROMETHEUS_METRICS
    ) -> List[str]:
        """
        Get the labels for a metric, filtered if configured
        """
        # Get default labels for this metric from PrometheusMetricLabels
        default_labels = PrometheusMetricLabels.get_labels(metric_name)

        # If no label filtering is configured for this metric, use default labels
        if metric_name not in self.label_filters:
            return default_labels

        # Get configured labels for this metric
        configured_labels = self.label_filters[metric_name]

        # Return intersection of configured and default labels to ensure we only use valid labels
        filtered_labels = [
            label for label in default_labels if label in configured_labels
        ]

        return filtered_labels

    async def async_log_success_event(self, kwargs, response_obj, start_time, end_time):
        # Define prometheus client
        from litellm.types.utils import StandardLoggingPayload

        verbose_logger.debug(
            f"prometheus Logging - Enters success logging function for kwargs {kwargs}"
        )

        # unpack kwargs
        standard_logging_payload: Optional[StandardLoggingPayload] = kwargs.get(
            "standard_logging_object"
        )

        if standard_logging_payload is None or not isinstance(
            standard_logging_payload, dict
        ):
            raise ValueError(
                f"standard_logging_object is required, got={standard_logging_payload}"
            )

        if self._should_skip_metrics_for_invalid_key(
            kwargs=kwargs, standard_logging_payload=standard_logging_payload
        ):
            return

        model = kwargs.get("model", "")
        litellm_params = kwargs.get("litellm_params", {}) or {}
        _metadata = litellm_params.get("metadata") or {}
        get_end_user_id_for_cost_tracking = _get_cached_end_user_id_for_cost_tracking()

        end_user_id = get_end_user_id_for_cost_tracking(
            litellm_params, service_type="prometheus"
        )
        user_id = standard_logging_payload["metadata"]["user_api_key_user_id"]
        user_api_key = standard_logging_payload["metadata"]["user_api_key_hash"]
        user_api_key_alias = standard_logging_payload["metadata"]["user_api_key_alias"]
        user_api_team = standard_logging_payload["metadata"]["user_api_key_team_id"]
        user_api_team_alias = standard_logging_payload["metadata"][
            "user_api_key_team_alias"
        ]
        output_tokens = standard_logging_payload["completion_tokens"]
        tokens_used = standard_logging_payload["total_tokens"]
        response_cost = standard_logging_payload["response_cost"]
        _requester_metadata: Optional[dict] = standard_logging_payload["metadata"].get(
            "requester_metadata"
        )
        user_api_key_auth_metadata: Optional[dict] = standard_logging_payload[
            "metadata"
        ].get("user_api_key_auth_metadata")

        combined_metadata: Dict[str, Any] = {
            **(_requester_metadata if _requester_metadata else {}),
            **(user_api_key_auth_metadata if user_api_key_auth_metadata else {}),
        }
        if standard_logging_payload is not None and isinstance(
            standard_logging_payload, dict
        ):
            _tags = standard_logging_payload["request_tags"]
        else:
            _tags = []

        print_verbose(
            f"inside track_prometheus_metrics, model {model}, response_cost {response_cost}, tokens_used {tokens_used}, end_user_id {end_user_id}, user_api_key {user_api_key}"
        )

        enum_values = UserAPIKeyLabelValues(
            end_user=end_user_id,
            hashed_api_key=user_api_key,
            api_key_alias=user_api_key_alias,
            requested_model=standard_logging_payload["model_group"],
            model_group=standard_logging_payload["model_group"],
            team=user_api_team,
            team_alias=user_api_team_alias,
            user=user_id,
            user_email=standard_logging_payload["metadata"]["user_api_key_user_email"],
            status_code="200",
            model=model,
            litellm_model_name=model,
            tags=_tags,
            model_id=standard_logging_payload["model_id"],
            api_base=standard_logging_payload["api_base"],
            api_provider=standard_logging_payload["custom_llm_provider"],
            exception_status=None,
            exception_class=None,
            custom_metadata_labels=get_custom_labels_from_metadata(
                metadata=combined_metadata
            ),
            route=standard_logging_payload["metadata"].get(
                "user_api_key_request_route"
            ),
            client_ip=standard_logging_payload["metadata"].get("requester_ip_address"),
            user_agent=standard_logging_payload["metadata"].get("user_agent"),
            stream=str(standard_logging_payload.get("stream"))
            if litellm.prometheus_emit_stream_label
            else None,
        )

        if (
            user_api_key is not None
            and isinstance(user_api_key, str)
            and user_api_key.startswith("sk-")
        ):
            from litellm.proxy.utils import hash_token

            user_api_key = hash_token(user_api_key)

        # increment total LLM requests and spend metric
        self._increment_top_level_request_and_spend_metrics(
            end_user_id=end_user_id,
            user_api_key=user_api_key,
            user_api_key_alias=user_api_key_alias,
            model=model,
            user_api_team=user_api_team,
            user_api_team_alias=user_api_team_alias,
            user_id=user_id,
            response_cost=response_cost,
            enum_values=enum_values,
        )

        # input, output, total token metrics
        self._increment_token_metrics(
            # why type ignore below?
            # 1. We just checked if isinstance(standard_logging_payload, dict). Pyright complains.
            # 2. Pyright does not allow us to run isinstance(standard_logging_payload, StandardLoggingPayload) <- this would be ideal
            standard_logging_payload=standard_logging_payload,  # type: ignore
            end_user_id=end_user_id,
            user_api_key=user_api_key,
            user_api_key_alias=user_api_key_alias,
            model=model,
            user_api_team=user_api_team,
            user_api_team_alias=user_api_team_alias,
            user_id=user_id,
            enum_values=enum_values,
        )

        # remaining budget metrics
        await self._increment_remaining_budget_metrics(
            user_api_team=user_api_team,
            user_api_team_alias=user_api_team_alias,
            user_api_key=user_api_key,
            user_api_key_alias=user_api_key_alias,
            litellm_params=litellm_params,
            response_cost=response_cost,
            user_id=user_id,
        )

        # set proxy virtual key rpm/tpm metrics
        self._set_virtual_key_rate_limit_metrics(
            user_api_key=user_api_key,
            user_api_key_alias=user_api_key_alias,
            kwargs=kwargs,
            metadata=_metadata,
            model_id=enum_values.model_id,
        )

        # set latency metrics
        self._set_latency_metrics(
            kwargs=kwargs,
            model=model,
            user_api_key=user_api_key,
            user_api_key_alias=user_api_key_alias,
            user_api_team=user_api_team,
            user_api_team_alias=user_api_team_alias,
            # why type ignore below?
            # 1. We just checked if isinstance(standard_logging_payload, dict). Pyright complains.
            # 2. Pyright does not allow us to run isinstance(standard_logging_payload, StandardLoggingPayload) <- this would be ideal
            enum_values=enum_values,
        )

        # set x-ratelimit headers
        self.set_llm_deployment_success_metrics(
            kwargs, start_time, end_time, enum_values, output_tokens
        )

        # cache metrics
        self._increment_cache_metrics(
            standard_logging_payload=standard_logging_payload,  # type: ignore
            enum_values=enum_values,
        )

        # increment litellm_proxy_total_requests_metric for all successful requests
        # (both streaming and non-streaming) in this single location to prevent
        # double-counting that occurs when async_post_call_success_hook also increments
        _labels = prometheus_label_factory(
            supported_enum_labels=self.get_labels_for_metric(
                metric_name="litellm_proxy_total_requests_metric"
            ),
            enum_values=enum_values,
        )
        self.litellm_proxy_total_requests_metric.labels(**_labels).inc()

    def _increment_token_metrics(
        self,
        standard_logging_payload: StandardLoggingPayload,
        end_user_id: Optional[str],
        user_api_key: Optional[str],
        user_api_key_alias: Optional[str],
        model: Optional[str],
        user_api_team: Optional[str],
        user_api_team_alias: Optional[str],
        user_id: Optional[str],
        enum_values: UserAPIKeyLabelValues,
    ):
        verbose_logger.debug("prometheus Logging - Enters token metrics function")
        # token metrics

        if standard_logging_payload is not None and isinstance(
            standard_logging_payload, dict
        ):
            _tags = standard_logging_payload["request_tags"]

        _labels = prometheus_label_factory(
            supported_enum_labels=self.get_labels_for_metric(
                metric_name="litellm_total_tokens_metric"
            ),
            enum_values=enum_values,
        )
        self.litellm_tokens_metric.labels(**_labels).inc(
            standard_logging_payload["total_tokens"]
        )

        _labels = prometheus_label_factory(
            supported_enum_labels=self.get_labels_for_metric(
                metric_name="litellm_input_tokens_metric"
            ),
            enum_values=enum_values,
        )
        self.litellm_input_tokens_metric.labels(**_labels).inc(
            standard_logging_payload["prompt_tokens"]
        )

        _labels = prometheus_label_factory(
            supported_enum_labels=self.get_labels_for_metric(
                metric_name="litellm_output_tokens_metric"
            ),
            enum_values=enum_values,
        )

        self.litellm_output_tokens_metric.labels(**_labels).inc(
            standard_logging_payload["completion_tokens"]
        )

    def _increment_cache_metrics(
        self,
        standard_logging_payload: StandardLoggingPayload,
        enum_values: UserAPIKeyLabelValues,
    ):
        """
        Increment cache-related Prometheus metrics based on cache hit/miss status.

        Args:
            standard_logging_payload: Contains cache_hit field (True/False/None)
            enum_values: Label values for Prometheus metrics
        """
        cache_hit = standard_logging_payload.get("cache_hit")

        # Only track if cache_hit has a definite value (True or False)
        if cache_hit is None:
            return

        if cache_hit is True:
            # Increment cache hits counter
            _labels = prometheus_label_factory(
                supported_enum_labels=self.get_labels_for_metric(
                    metric_name="litellm_cache_hits_metric"
                ),
                enum_values=enum_values,
            )
            self.litellm_cache_hits_metric.labels(**_labels).inc()

            # Increment cached tokens counter
            total_tokens = standard_logging_payload.get("total_tokens", 0)
            if total_tokens > 0:
                _labels = prometheus_label_factory(
                    supported_enum_labels=self.get_labels_for_metric(
                        metric_name="litellm_cached_tokens_metric"
                    ),
                    enum_values=enum_values,
                )
                self.litellm_cached_tokens_metric.labels(**_labels).inc(total_tokens)
        else:
            # cache_hit is False - increment cache misses counter
            _labels = prometheus_label_factory(
                supported_enum_labels=self.get_labels_for_metric(
                    metric_name="litellm_cache_misses_metric"
                ),
                enum_values=enum_values,
            )
            self.litellm_cache_misses_metric.labels(**_labels).inc()

    async def _increment_remaining_budget_metrics(
        self,
        user_api_team: Optional[str],
        user_api_team_alias: Optional[str],
        user_api_key: Optional[str],
        user_api_key_alias: Optional[str],
        litellm_params: dict,
        response_cost: float,
        user_id: Optional[str] = None,
    ):
        _metadata = litellm_params.get("metadata") or {}
        _team_spend = _metadata.get("user_api_key_team_spend", None)
        _team_max_budget = _metadata.get("user_api_key_team_max_budget", None)

        _api_key_spend = _metadata.get("user_api_key_spend", None)
        _api_key_max_budget = _metadata.get("user_api_key_max_budget", None)

        _user_spend = _metadata.get("user_api_key_user_spend", None)
        _user_max_budget = _metadata.get("user_api_key_user_max_budget", None)

        results = await asyncio.gather(
            self._set_api_key_budget_metrics_after_api_request(
                user_api_key=user_api_key,
                user_api_key_alias=user_api_key_alias,
                response_cost=response_cost,
                key_max_budget=_api_key_max_budget,
                key_spend=_api_key_spend,
            ),
            self._set_team_budget_metrics_after_api_request(
                user_api_team=user_api_team,
                user_api_team_alias=user_api_team_alias,
                team_spend=_team_spend,
                team_max_budget=_team_max_budget,
                response_cost=response_cost,
            ),
            self._set_user_budget_metrics_after_api_request(
                user_id=user_id,
                user_spend=_user_spend,
                user_max_budget=_user_max_budget,
                response_cost=response_cost,
            ),
            return_exceptions=True,
        )
        for i, r in enumerate(results):
            if isinstance(r, Exception):
                verbose_logger.debug(
                    f"[Non-Blocking] Prometheus: Budget metric lookup {['key', 'team', 'user'][i]} failed: {r}"
                )

    def _increment_top_level_request_and_spend_metrics(
        self,
        end_user_id: Optional[str],
        user_api_key: Optional[str],
        user_api_key_alias: Optional[str],
        model: Optional[str],
        user_api_team: Optional[str],
        user_api_team_alias: Optional[str],
        user_id: Optional[str],
        response_cost: float,
        enum_values: UserAPIKeyLabelValues,
    ):
        _labels = prometheus_label_factory(
            supported_enum_labels=self.get_labels_for_metric(
                metric_name="litellm_requests_metric"
            ),
            enum_values=enum_values,
        )

        self.litellm_requests_metric.labels(**_labels).inc()

        _labels = prometheus_label_factory(
            supported_enum_labels=self.get_labels_for_metric(
                metric_name="litellm_spend_metric"
            ),
            enum_values=enum_values,
        )

        self.litellm_spend_metric.labels(**_labels).inc(response_cost)

    def _set_virtual_key_rate_limit_metrics(
        self,
        user_api_key: Optional[str],
        user_api_key_alias: Optional[str],
        kwargs: dict,
        metadata: dict,
        model_id: Optional[str] = None,
    ):
        from litellm.proxy.common_utils.callback_utils import (
            get_model_group_from_litellm_kwargs,
        )

        # Set remaining rpm/tpm for API Key + model
        # see parallel_request_limiter.py - variables are set there
        model_group = get_model_group_from_litellm_kwargs(kwargs)
        remaining_requests_variable_name = (
            f"litellm-key-remaining-requests-{model_group}"
        )
        remaining_tokens_variable_name = f"litellm-key-remaining-tokens-{model_group}"

        remaining_requests = (
            metadata.get(remaining_requests_variable_name, sys.maxsize) or sys.maxsize
        )
        remaining_tokens = (
            metadata.get(remaining_tokens_variable_name, sys.maxsize) or sys.maxsize
        )

        self.litellm_remaining_api_key_requests_for_model.labels(
            _sanitize_prometheus_label_value(user_api_key),
            _sanitize_prometheus_label_value(user_api_key_alias),
            _sanitize_prometheus_label_value(model_group),
            _sanitize_prometheus_label_value(model_id),
        ).set(remaining_requests)

        self.litellm_remaining_api_key_tokens_for_model.labels(
            _sanitize_prometheus_label_value(user_api_key),
            _sanitize_prometheus_label_value(user_api_key_alias),
            _sanitize_prometheus_label_value(model_group),
            _sanitize_prometheus_label_value(model_id),
        ).set(remaining_tokens)

    def _set_latency_metrics(
        self,
        kwargs: dict,
        model: Optional[str],
        user_api_key: Optional[str],
        user_api_key_alias: Optional[str],
        user_api_team: Optional[str],
        user_api_team_alias: Optional[str],
        enum_values: UserAPIKeyLabelValues,
    ):
        # latency metrics
        end_time: datetime = kwargs.get("end_time") or datetime.now()
        start_time: Optional[datetime] = kwargs.get("start_time")
        api_call_start_time = kwargs.get("api_call_start_time", None)
        completion_start_time = kwargs.get("completion_start_time", None)
        time_to_first_token_seconds = self._safe_duration_seconds(
            start_time=api_call_start_time,
            end_time=completion_start_time,
        )
        if (
            time_to_first_token_seconds is not None
            and kwargs.get("stream", False) is True  # only emit for streaming requests
        ):
            _ttft_labels = prometheus_label_factory(
                supported_enum_labels=self.get_labels_for_metric(
                    metric_name="litellm_llm_api_time_to_first_token_metric"
                ),
                enum_values=enum_values,
            )
            self.litellm_llm_api_time_to_first_token_metric.labels(
                **_ttft_labels
            ).observe(time_to_first_token_seconds)
        else:
            verbose_logger.debug(
                "Time to first token metric not emitted, stream option in model_parameters is not True"
            )

        api_call_total_time_seconds = self._safe_duration_seconds(
            start_time=api_call_start_time,
            end_time=end_time,
        )
        if api_call_total_time_seconds is not None:
            _labels = prometheus_label_factory(
                supported_enum_labels=self.get_labels_for_metric(
                    metric_name="litellm_llm_api_latency_metric"
                ),
                enum_values=enum_values,
            )
            self.litellm_llm_api_latency_metric.labels(**_labels).observe(
                api_call_total_time_seconds
            )

        # total request latency
        total_time_seconds = self._safe_duration_seconds(
            start_time=start_time,
            end_time=end_time,
        )
        if total_time_seconds is not None:
            _labels = prometheus_label_factory(
                supported_enum_labels=self.get_labels_for_metric(
                    metric_name="litellm_request_total_latency_metric"
                ),
                enum_values=enum_values,
            )
            self.litellm_request_total_latency_metric.labels(**_labels).observe(
                total_time_seconds
            )

        # request queue time (time from arrival to processing start)
        _litellm_params = kwargs.get("litellm_params", {}) or {}
        queue_time_seconds = (_litellm_params.get("metadata") or {}).get(
            "queue_time_seconds"
        )
        if queue_time_seconds is not None and queue_time_seconds >= 0:
            _labels = prometheus_label_factory(
                supported_enum_labels=self.get_labels_for_metric(
                    metric_name="litellm_request_queue_time_seconds"
                ),
                enum_values=enum_values,
            )
            self.litellm_request_queue_time_metric.labels(**_labels).observe(
                queue_time_seconds
            )

    async def async_log_failure_event(self, kwargs, response_obj, start_time, end_time):
        from litellm.types.utils import StandardLoggingPayload

        verbose_logger.debug(
            f"prometheus Logging - Enters failure logging function for kwargs {kwargs}"
        )

        standard_logging_payload: StandardLoggingPayload = kwargs.get(
            "standard_logging_object", {}
        )

        if self._should_skip_metrics_for_invalid_key(
            kwargs=kwargs, standard_logging_payload=standard_logging_payload
        ):
            return

        model = kwargs.get("model", "")

        litellm_params = kwargs.get("litellm_params", {}) or {}
        get_end_user_id_for_cost_tracking = _get_cached_end_user_id_for_cost_tracking()

        end_user_id = get_end_user_id_for_cost_tracking(
            litellm_params, service_type="prometheus"
        )
        user_id = standard_logging_payload["metadata"]["user_api_key_user_id"]
        user_api_key = standard_logging_payload["metadata"]["user_api_key_hash"]
        user_api_key_alias = standard_logging_payload["metadata"]["user_api_key_alias"]
        user_api_team = standard_logging_payload["metadata"]["user_api_key_team_id"]
        user_api_team_alias = standard_logging_payload["metadata"][
            "user_api_key_team_alias"
        ]

        try:
            self.litellm_llm_api_failed_requests_metric.labels(
                _sanitize_prometheus_label_value(end_user_id),
                _sanitize_prometheus_label_value(user_api_key),
                _sanitize_prometheus_label_value(user_api_key_alias),
                _sanitize_prometheus_label_value(model),
                _sanitize_prometheus_label_value(user_api_team),
                _sanitize_prometheus_label_value(user_api_team_alias),
                _sanitize_prometheus_label_value(user_id),
                _sanitize_prometheus_label_value(
                    standard_logging_payload.get("model_id", "")
                ),
            ).inc()
            self.set_llm_deployment_failure_metrics(kwargs)
        except Exception as e:
            verbose_logger.exception(
                "prometheus Layer Error(): Exception occured - {}".format(str(e))
            )
            pass
        pass

    def _extract_status_code(
        self,
        kwargs: Optional[dict] = None,
        enum_values: Optional[Any] = None,
        exception: Optional[Exception] = None,
    ) -> Optional[int]:
        """
        Extract HTTP status code from various input formats for validation.

        This is a centralized helper to extract status code from different
        callback function signatures. Handles both ProxyException (uses 'code')
        and standard exceptions (uses 'status_code').

        Args:
            kwargs: Dictionary potentially containing 'exception' key
            enum_values: Object with 'status_code' attribute
            exception: Exception object to extract status code from directly

        Returns:
            Status code as integer if found, None otherwise
        """
        status_code = None

        # Try from enum_values first (most common in our callbacks)
        if (
            enum_values
            and hasattr(enum_values, "status_code")
            and enum_values.status_code
        ):
            try:
                status_code = int(enum_values.status_code)
            except (ValueError, TypeError):
                pass

        if not status_code and exception:
            # ProxyException uses 'code' attribute, other exceptions may use 'status_code'
            status_code = getattr(exception, "status_code", None) or getattr(
                exception, "code", None
            )
            if status_code is not None:
                try:
                    status_code = int(status_code)
                except (ValueError, TypeError):
                    status_code = None

        if not status_code and kwargs:
            exception_in_kwargs = kwargs.get("exception")
            if exception_in_kwargs:
                status_code = getattr(
                    exception_in_kwargs, "status_code", None
                ) or getattr(exception_in_kwargs, "code", None)
                if status_code is not None:
                    try:
                        status_code = int(status_code)
                    except (ValueError, TypeError):
                        status_code = None

        return status_code

    def _is_invalid_api_key_request(
        self,
        status_code: Optional[int],
        exception: Optional[Exception] = None,
    ) -> bool:
        """
        Determine if a request has an invalid API key based on status code and exception.

        This method prevents invalid authentication attempts from being recorded in
        Prometheus metrics. A 401 status code is the definitive indicator of authentication
        failure. Additionally, we check exception messages for authentication error patterns
        to catch cases where the exception hasn't been converted to a ProxyException yet.

        Args:
            status_code: HTTP status code (401 indicates authentication error)
            exception: Exception object to check for auth-related error messages

        Returns:
            True if the request has an invalid API key and metrics should be skipped,
            False otherwise
        """
        if status_code == 401:
            return True

        # Handle cases where AssertionError is raised before conversion to ProxyException
        if exception is not None:
            exception_str = str(exception).lower()
            auth_error_patterns = [
                "virtual key expected",
                "expected to start with 'sk-'",
                "authentication error",
                "invalid api key",
                "api key not valid",
            ]
            if any(pattern in exception_str for pattern in auth_error_patterns):
                return True

        return False

    def _should_skip_metrics_for_invalid_key(
        self,
        kwargs: Optional[dict] = None,
        user_api_key_dict: Optional[Any] = None,
        enum_values: Optional[Any] = None,
        standard_logging_payload: Optional[Union[dict, StandardLoggingPayload]] = None,
        exception: Optional[Exception] = None,
    ) -> bool:
        """
        Determine if Prometheus metrics should be skipped for invalid API key requests.

        This is a centralized validation method that extracts status code and exception
        information from various callback function signatures and determines if the request
        represents an invalid API key attempt that should be filtered from metrics.

        Args:
            kwargs: Dictionary potentially containing exception and other data
            user_api_key_dict: User API key authentication object (currently unused)
            enum_values: Object with status_code attribute
            standard_logging_payload: Standard logging payload dictionary
            exception: Exception object to check directly

        Returns:
            True if metrics should be skipped (invalid key detected), False otherwise
        """
        status_code = self._extract_status_code(
            kwargs=kwargs,
            enum_values=enum_values,
            exception=exception,
        )

        if exception is None and kwargs:
            exception = kwargs.get("exception")

        if self._is_invalid_api_key_request(status_code, exception=exception):
            verbose_logger.debug(
                "Skipping Prometheus metrics for invalid API key request: "
                f"status_code={status_code}, exception={type(exception).__name__ if exception else None}"
            )
            return True

        return False

    async def async_post_call_failure_hook(
        self,
        request_data: dict,
        original_exception: Exception,
        user_api_key_dict: UserAPIKeyAuth,
        traceback_str: Optional[str] = None,
    ):
        """
        Track client side failures

        Proxy level tracking - failed client side requests

        labelnames=[
                    "end_user",
                    "hashed_api_key",
                    "api_key_alias",
                    REQUESTED_MODEL,
                    "team",
                    "team_alias",
                ] + EXCEPTION_LABELS,
        """
        from litellm.litellm_core_utils.litellm_logging import (
            StandardLoggingPayloadSetup,
        )

        if self._should_skip_metrics_for_invalid_key(
            user_api_key_dict=user_api_key_dict,
            exception=original_exception,
        ):
            return

        status_code = self._extract_status_code(exception=original_exception)

        try:
            _tags = StandardLoggingPayloadSetup._get_request_tags(
                litellm_params=request_data,
                proxy_server_request=request_data.get("proxy_server_request", {}),
            )
            _metadata = request_data.get("metadata", {}) or {}
            model_id = _metadata.get("model_info", {}).get("id") or request_data.get(
                "model_info", {}
            ).get("id")
            enum_values = UserAPIKeyLabelValues(
                end_user=user_api_key_dict.end_user_id,
                user=user_api_key_dict.user_id,
                user_email=user_api_key_dict.user_email,
                hashed_api_key=user_api_key_dict.api_key,
                api_key_alias=user_api_key_dict.key_alias,
                team=user_api_key_dict.team_id,
                team_alias=user_api_key_dict.team_alias,
                requested_model=request_data.get("model", ""),
                status_code=str(status_code),
                exception_status=str(status_code),
                exception_class=self._get_exception_class_name(original_exception),
                tags=_tags,
                route=user_api_key_dict.request_route,
                client_ip=_metadata.get("requester_ip_address"),
                user_agent=_metadata.get("user_agent"),
                model_id=model_id,
                stream=str(request_data.get("stream"))
                if litellm.prometheus_emit_stream_label
                else None,
            )
            _labels = prometheus_label_factory(
                supported_enum_labels=self.get_labels_for_metric(
                    metric_name="litellm_proxy_failed_requests_metric"
                ),
                enum_values=enum_values,
            )
            self.litellm_proxy_failed_requests_metric.labels(**_labels).inc()

            _labels = prometheus_label_factory(
                supported_enum_labels=self.get_labels_for_metric(
                    metric_name="litellm_proxy_total_requests_metric"
                ),
                enum_values=enum_values,
            )
            self.litellm_proxy_total_requests_metric.labels(**_labels).inc()

        except Exception as e:
            verbose_logger.exception(
                "prometheus Layer Error(): Exception occured - {}".format(str(e))
            )
            pass

    async def async_post_call_success_hook(
        self, data: dict, user_api_key_dict: UserAPIKeyAuth, response
    ):
        """
        Proxy level tracking - triggered when the proxy responds with a success response to the client

        Note: litellm_proxy_total_requests_metric is NOT incremented here to avoid
        double-counting. It is incremented in async_log_success_event which fires
        for all successful requests (both streaming and non-streaming).
        """
        pass

    def _safe_get(self, obj: Any, key: str, default: Any = None) -> Any:
        """Get value from dict or Pydantic model."""
        if obj is None:
            return default
        if isinstance(obj, dict):
            return obj.get(key, default)
        return getattr(obj, key, default)

    def _extract_deployment_failure_label_values(
        self, request_kwargs: dict
    ) -> Dict[str, Optional[str]]:
        """
        Extract label values for deployment failure metrics from all available
        sources in request_kwargs. Falls back to litellm_params metadata and
        user_api_key_auth when standard_logging_payload has None values.
        """
        standard_logging_payload = (
            request_kwargs.get("standard_logging_object", {}) or {}
        )
        _litellm_params = request_kwargs.get("litellm_params", {}) or {}
        _metadata_raw = self._safe_get(standard_logging_payload, "metadata") or {}
        if isinstance(_metadata_raw, dict):
            _metadata = _metadata_raw
        else:
            _metadata = {
                "user_api_key_alias": getattr(
                    _metadata_raw, "user_api_key_alias", None
                ),
                "user_api_key_team_id": getattr(
                    _metadata_raw, "user_api_key_team_id", None
                ),
                "user_api_key_team_alias": getattr(
                    _metadata_raw, "user_api_key_team_alias", None
                ),
                "user_api_key_hash": getattr(_metadata_raw, "user_api_key_hash", None),
                "requester_ip_address": getattr(
                    _metadata_raw, "requester_ip_address", None
                ),
                "user_agent": getattr(_metadata_raw, "user_agent", None),
            }
        _litellm_params_metadata = _litellm_params.get("metadata", {}) or {}

        # Extract user_api_key_auth if present (proxy injects this, skipped in merge)
        user_api_key_auth = _litellm_params_metadata.get("user_api_key_auth")

        def _get_api_key_alias() -> Optional[str]:
            val = _metadata.get("user_api_key_alias")
            if val is not None:
                return val
            val = _litellm_params_metadata.get("user_api_key_alias")
            if val is not None:
                return val
            if user_api_key_auth is not None:
                return getattr(user_api_key_auth, "key_alias", None)
            return None

        def _get_team_id() -> Optional[str]:
            val = _metadata.get("user_api_key_team_id")
            if val is not None:
                return val
            val = _litellm_params_metadata.get("user_api_key_team_id")
            if val is not None:
                return val
            if user_api_key_auth is not None:
                return getattr(user_api_key_auth, "team_id", None)
            return None

        def _get_team_alias() -> Optional[str]:
            val = _metadata.get("user_api_key_team_alias")
            if val is not None:
                return val
            val = _litellm_params_metadata.get("user_api_key_team_alias")
            if val is not None:
                return val
            if user_api_key_auth is not None:
                return getattr(user_api_key_auth, "team_alias", None)
            return None

        def _get_hashed_api_key() -> Optional[str]:
            val = _metadata.get("user_api_key_hash")
            if val is not None:
                return val
            val = _litellm_params_metadata.get("user_api_key_hash")
            if val is not None:
                return val
            if user_api_key_auth is not None:
                return getattr(user_api_key_auth, "api_key", None) or getattr(
                    user_api_key_auth, "api_key_hash", None
                )
            return None

        return {
            "api_key_alias": _get_api_key_alias(),
            "team": _get_team_id(),
            "team_alias": _get_team_alias(),
            "hashed_api_key": _get_hashed_api_key(),
            "client_ip": _metadata.get("requester_ip_address")
            or _litellm_params_metadata.get("requester_ip_address"),
            "user_agent": _metadata.get("user_agent")
            or _litellm_params_metadata.get("user_agent"),
        }

    def set_llm_deployment_failure_metrics(self, request_kwargs: dict):
        """
        Sets Failure metrics when an LLM API call fails

        - mark the deployment as partial outage
        - increment deployment failure responses metric
        - increment deployment total requests metric

        Args:
            request_kwargs: dict

        """
        try:
            verbose_logger.debug("setting remaining tokens requests metric")
            standard_logging_payload: StandardLoggingPayload = request_kwargs.get(
                "standard_logging_object", {}
            )
            _litellm_params = request_kwargs.get("litellm_params", {}) or {}
            litellm_model_name = request_kwargs.get("model", None)
            model_group = standard_logging_payload.get("model_group", None)
            api_base = standard_logging_payload.get("api_base", None)
            model_id = standard_logging_payload.get("model_id", None)
            exception = request_kwargs.get("exception", None)

            # Fallback: model_id from litellm_metadata.model_info
            if model_id is None:
                _model_info = (
                    (_litellm_params.get("litellm_metadata") or {}).get("model_info")
                    or (_litellm_params.get("metadata") or {}).get("model_info")
                    or {}
                )
                model_id = _model_info.get("id")

            # Fallback: model_group from litellm_metadata
            if model_group is None:
                model_group = (_litellm_params.get("litellm_metadata") or {}).get(
                    "model_group"
                ) or (_litellm_params.get("metadata") or {}).get("model_group")

            llm_provider = _litellm_params.get("custom_llm_provider", None)

            if self._should_skip_metrics_for_invalid_key(
                kwargs=request_kwargs,
                standard_logging_payload=standard_logging_payload,
            ):
                return

            # Extract context labels from all available sources (fix for None labels)
            fallback_values = self._extract_deployment_failure_label_values(
                request_kwargs
            )
            _metadata = standard_logging_payload.get("metadata", {}) or {}
            hashed_api_key = fallback_values.get("hashed_api_key") or _metadata.get(
                "user_api_key_hash"
            )
            api_key_alias = fallback_values.get("api_key_alias") or _metadata.get(
                "user_api_key_alias"
            )
            team = fallback_values.get("team") or _metadata.get("user_api_key_team_id")
            team_alias = fallback_values.get("team_alias") or _metadata.get(
                "user_api_key_team_alias"
            )
            client_ip = fallback_values.get("client_ip") or _metadata.get(
                "requester_ip_address"
            )
            user_agent = fallback_values.get("user_agent") or _metadata.get(
                "user_agent"
            )

            # exception_status: prefer status_code, fallback to exception class for known types
            exception_status = None
            if exception is not None:
                exception_status = str(getattr(exception, "status_code", None))
                if exception_status == "None" or not exception_status:
                    code = getattr(exception, "code", None)
                    if code is not None:
                        exception_status = str(code)

            # Create enum_values for the label factory (always create for use in different metrics)
            enum_values = UserAPIKeyLabelValues(
                litellm_model_name=litellm_model_name,
                model_id=model_id,
                api_base=api_base,
                api_provider=llm_provider,
                exception_status=exception_status,
                exception_class=(
                    self._get_exception_class_name(exception) if exception else None
                ),
                requested_model=model_group or litellm_model_name,
                hashed_api_key=hashed_api_key,
                api_key_alias=api_key_alias,
                team=team,
                team_alias=team_alias,
                tags=standard_logging_payload.get("request_tags", []),
                client_ip=client_ip,
                user_agent=user_agent,
            )

            """
            log these labels
            ["litellm_model_name", "model_id", "api_base", "api_provider"]
            """
            self.set_deployment_partial_outage(
                litellm_model_name=litellm_model_name or "",
                model_id=model_id,
                api_base=api_base,
                api_provider=llm_provider or "",
            )
            if exception is not None:
                _labels = prometheus_label_factory(
                    supported_enum_labels=self.get_labels_for_metric(
                        metric_name="litellm_deployment_failure_responses"
                    ),
                    enum_values=enum_values,
                )
                self.litellm_deployment_failure_responses.labels(**_labels).inc()

            _labels = prometheus_label_factory(
                supported_enum_labels=self.get_labels_for_metric(
                    metric_name="litellm_deployment_total_requests"
                ),
                enum_values=enum_values,
            )
            self.litellm_deployment_total_requests.labels(**_labels).inc()

            pass
        except Exception as e:
            verbose_logger.debug(
                "Prometheus Error: set_llm_deployment_failure_metrics. Exception occured - {}".format(
                    str(e)
                )
            )

    def _set_deployment_tpm_rpm_limit_metrics(
        self,
        model_info: dict,
        litellm_params: dict,
        litellm_model_name: Optional[str],
        model_id: Optional[str],
        api_base: Optional[str],
        llm_provider: Optional[str],
    ):
        """
        Set the deployment TPM and RPM limits metrics
        """
        tpm = model_info.get("tpm") or litellm_params.get("tpm")
        rpm = model_info.get("rpm") or litellm_params.get("rpm")

        if tpm is not None:
            _labels = prometheus_label_factory(
                supported_enum_labels=self.get_labels_for_metric(
                    metric_name="litellm_deployment_tpm_limit"
                ),
                enum_values=UserAPIKeyLabelValues(
                    litellm_model_name=litellm_model_name,
                    model_id=model_id,
                    api_base=api_base,
                    api_provider=llm_provider,
                ),
            )
            self.litellm_deployment_tpm_limit.labels(**_labels).set(tpm)

        if rpm is not None:
            _labels = prometheus_label_factory(
                supported_enum_labels=self.get_labels_for_metric(
                    metric_name="litellm_deployment_rpm_limit"
                ),
                enum_values=UserAPIKeyLabelValues(
                    litellm_model_name=litellm_model_name,
                    model_id=model_id,
                    api_base=api_base,
                    api_provider=llm_provider,
                ),
            )
            self.litellm_deployment_rpm_limit.labels(**_labels).set(rpm)

    def set_llm_deployment_success_metrics(
        self,
        request_kwargs: dict,
        start_time,
        end_time,
        enum_values: UserAPIKeyLabelValues,
        output_tokens: float = 1.0,
    ):
        try:
            verbose_logger.debug("setting remaining tokens requests metric")
            standard_logging_payload: Optional[
                StandardLoggingPayload
            ] = request_kwargs.get("standard_logging_object")

            if standard_logging_payload is None:
                return

            # Skip recording metrics for invalid API key requests
            if self._should_skip_metrics_for_invalid_key(
                kwargs=request_kwargs,
                enum_values=enum_values,
                standard_logging_payload=standard_logging_payload,
            ):
                return

            api_base = standard_logging_payload["api_base"]
            _litellm_params = request_kwargs.get("litellm_params", {}) or {}
            _metadata = get_litellm_metadata_from_kwargs(request_kwargs)
            litellm_model_name = request_kwargs.get("model", None)
            llm_provider = _litellm_params.get("custom_llm_provider", None)
            _model_info = _metadata.get("model_info") or {}
            model_id = _model_info.get("id", None)

            if _model_info or _litellm_params:
                self._set_deployment_tpm_rpm_limit_metrics(
                    model_info=_model_info,
                    litellm_params=_litellm_params,
                    litellm_model_name=litellm_model_name,
                    model_id=model_id,
                    api_base=api_base,
                    llm_provider=llm_provider,
                )

            remaining_requests: Optional[int] = None
            remaining_tokens: Optional[int] = None
            if additional_headers := standard_logging_payload["hidden_params"][
                "additional_headers"
            ]:
                # OpenAI / OpenAI Compatible headers
                remaining_requests = additional_headers.get(
                    "x_ratelimit_remaining_requests", None
                )
                remaining_tokens = additional_headers.get(
                    "x_ratelimit_remaining_tokens", None
                )

            if litellm_overhead_time_ms := standard_logging_payload[
                "hidden_params"
            ].get("litellm_overhead_time_ms"):
                _labels = prometheus_label_factory(
                    supported_enum_labels=self.get_labels_for_metric(
                        metric_name="litellm_overhead_latency_metric"
                    ),
                    enum_values=enum_values,
                )
                self.litellm_overhead_latency_metric.labels(**_labels).observe(
                    litellm_overhead_time_ms / 1000
                )  # set as seconds

            if remaining_requests:
                """
                "model_group",
                "api_provider",
                "api_base",
                "litellm_model_name"
                """
                _labels = prometheus_label_factory(
                    supported_enum_labels=self.get_labels_for_metric(
                        metric_name="litellm_remaining_requests_metric"
                    ),
                    enum_values=enum_values,
                )
                self.litellm_remaining_requests_metric.labels(**_labels).set(
                    remaining_requests
                )

            if remaining_tokens:
                _labels = prometheus_label_factory(
                    supported_enum_labels=self.get_labels_for_metric(
                        metric_name="litellm_remaining_tokens_metric"
                    ),
                    enum_values=enum_values,
                )
                self.litellm_remaining_tokens_metric.labels(**_labels).set(
                    remaining_tokens
                )

            """
            log these labels
            ["litellm_model_name", "requested_model", model_id", "api_base", "api_provider"]
            """
            self.set_deployment_healthy(
                litellm_model_name=litellm_model_name or "",
                model_id=model_id or "",
                api_base=api_base or "",
                api_provider=llm_provider or "",
            )

            _labels = prometheus_label_factory(
                supported_enum_labels=self.get_labels_for_metric(
                    metric_name="litellm_deployment_success_responses"
                ),
                enum_values=enum_values,
            )
            self.litellm_deployment_success_responses.labels(**_labels).inc()

            _labels = prometheus_label_factory(
                supported_enum_labels=self.get_labels_for_metric(
                    metric_name="litellm_deployment_total_requests"
                ),
                enum_values=enum_values,
            )
            self.litellm_deployment_total_requests.labels(**_labels).inc()

            # Track deployment Latency
            response_ms: timedelta = end_time - start_time
            time_to_first_token_response_time: Optional[timedelta] = None

            if (
                request_kwargs.get("stream", None) is not None
                and request_kwargs["stream"] is True
            ):
                # only log ttft for streaming request
                time_to_first_token_response_time = (
                    request_kwargs.get("completion_start_time", end_time) - start_time
                )

            # use the metric that is not None
            # if streaming - use time_to_first_token_response
            # if not streaming - use response_ms
            _latency: timedelta = time_to_first_token_response_time or response_ms
            _latency_seconds = _latency.total_seconds()

            # latency per output token
            latency_per_token = None
            if output_tokens is not None and output_tokens > 0:
                latency_per_token = _latency_seconds / output_tokens
                _labels = prometheus_label_factory(
                    supported_enum_labels=self.get_labels_for_metric(
                        metric_name="litellm_deployment_latency_per_output_token"
                    ),
                    enum_values=enum_values,
                )
                self.litellm_deployment_latency_per_output_token.labels(
                    **_labels
                ).observe(latency_per_token)

        except Exception as e:
            verbose_logger.exception(
                "Prometheus Error: set_llm_deployment_success_metrics. Exception occured - {}".format(
                    str(e)
                )
            )
            return

    def _record_guardrail_metrics(
        self,
        guardrail_name: str,
        latency_seconds: float,
        status: str,
        error_type: Optional[str],
        hook_type: str,
    ):
        """
        Record guardrail metrics for prometheus.

        Args:
            guardrail_name: Name of the guardrail
            latency_seconds: Execution latency in seconds
            status: "success" or "error"
            error_type: Type of error if any, None otherwise
            hook_type: "pre_call", "during_call", or "post_call"
        """
        try:
            # Record latency
            self.litellm_guardrail_latency_metric.labels(
                guardrail_name=guardrail_name,
                status=status,
                error_type=error_type or "none",
                hook_type=hook_type,
            ).observe(latency_seconds)

            # Record request count
            self.litellm_guardrail_requests_total.labels(
                guardrail_name=guardrail_name,
                status=status,
                hook_type=hook_type,
            ).inc()

            # Record error count if there was an error
            if status == "error" and error_type:
                self.litellm_guardrail_errors_total.labels(
                    guardrail_name=guardrail_name,
                    error_type=error_type,
                    hook_type=hook_type,
                ).inc()
        except Exception as e:
            verbose_logger.debug(f"Error recording guardrail metrics: {str(e)}")

    @staticmethod
    def _get_exception_class_name(exception: Exception) -> str:
        exception_class_name = ""
        if hasattr(exception, "llm_provider"):
            exception_class_name = getattr(exception, "llm_provider") or ""

        # pretty print the provider name on prometheus
        # eg. `openai` -> `Openai.`
        if len(exception_class_name) >= 1:
            exception_class_name = (
                exception_class_name[0].upper() + exception_class_name[1:] + "."
            )

        exception_class_name += exception.__class__.__name__
        return exception_class_name

    async def log_success_fallback_event(
        self, original_model_group: str, kwargs: dict, original_exception: Exception
    ):
        """

        Logs a successful LLM fallback event on prometheus

        """
        from litellm.litellm_core_utils.litellm_logging import (
            StandardLoggingMetadata,
            StandardLoggingPayloadSetup,
        )

        verbose_logger.debug(
            "Prometheus: log_success_fallback_event, original_model_group: %s, kwargs: %s",
            original_model_group,
            kwargs,
        )
        _metadata_key = get_metadata_variable_name_from_kwargs(kwargs)
        _metadata = kwargs.get(_metadata_key) or {}
        standard_metadata: StandardLoggingMetadata = (
            StandardLoggingPayloadSetup.get_standard_logging_metadata(
                metadata=_metadata
            )
        )
        _new_model = kwargs.get("model")
        _tags = cast(List[str], kwargs.get("tags") or [])

        enum_values = UserAPIKeyLabelValues(
            requested_model=original_model_group,
            fallback_model=_new_model,
            hashed_api_key=standard_metadata["user_api_key_hash"],
            api_key_alias=standard_metadata["user_api_key_alias"],
            team=standard_metadata["user_api_key_team_id"],
            team_alias=standard_metadata["user_api_key_team_alias"],
            exception_status=str(getattr(original_exception, "status_code", None)),
            exception_class=self._get_exception_class_name(original_exception),
            tags=_tags,
        )
        _labels = prometheus_label_factory(
            supported_enum_labels=self.get_labels_for_metric(
                metric_name="litellm_deployment_successful_fallbacks"
            ),
            enum_values=enum_values,
        )
        self.litellm_deployment_successful_fallbacks.labels(**_labels).inc()

    async def log_failure_fallback_event(
        self, original_model_group: str, kwargs: dict, original_exception: Exception
    ):
        """
        Logs a failed LLM fallback event on prometheus
        """
        from litellm.litellm_core_utils.litellm_logging import (
            StandardLoggingMetadata,
            StandardLoggingPayloadSetup,
        )

        verbose_logger.debug(
            "Prometheus: log_failure_fallback_event, original_model_group: %s, kwargs: %s",
            original_model_group,
            kwargs,
        )
        _new_model = kwargs.get("model")
        _metadata_key = get_metadata_variable_name_from_kwargs(kwargs)
        _metadata = kwargs.get(_metadata_key) or {}
        _tags = cast(List[str], kwargs.get("tags") or [])
        standard_metadata: StandardLoggingMetadata = (
            StandardLoggingPayloadSetup.get_standard_logging_metadata(
                metadata=_metadata
            )
        )

        enum_values = UserAPIKeyLabelValues(
            requested_model=original_model_group,
            fallback_model=_new_model,
            hashed_api_key=standard_metadata["user_api_key_hash"],
            api_key_alias=standard_metadata["user_api_key_alias"],
            team=standard_metadata["user_api_key_team_id"],
            team_alias=standard_metadata["user_api_key_team_alias"],
            exception_status=str(getattr(original_exception, "status_code", None)),
            exception_class=self._get_exception_class_name(original_exception),
            tags=_tags,
        )

        _labels = prometheus_label_factory(
            supported_enum_labels=self.get_labels_for_metric(
                metric_name="litellm_deployment_failed_fallbacks"
            ),
            enum_values=enum_values,
        )
        self.litellm_deployment_failed_fallbacks.labels(**_labels).inc()

    def set_litellm_deployment_state(
        self,
        state: int,
        litellm_model_name: str,
        model_id: Optional[str],
        api_base: Optional[str],
        api_provider: str,
    ):
        """
        Set the deployment state.
        """
        ### get labels
        _labels = prometheus_label_factory(
            supported_enum_labels=self.get_labels_for_metric(
                metric_name="litellm_deployment_state"
            ),
            enum_values=UserAPIKeyLabelValues(
                litellm_model_name=litellm_model_name,
                model_id=model_id,
                api_base=api_base,
                api_provider=api_provider,
            ),
        )
        self.litellm_deployment_state.labels(**_labels).set(state)

    def set_deployment_healthy(
        self,
        litellm_model_name: str,
        model_id: str,
        api_base: str,
        api_provider: str,
    ):
        self.set_litellm_deployment_state(
            0, litellm_model_name, model_id, api_base, api_provider
        )

    def set_deployment_partial_outage(
        self,
        litellm_model_name: str,
        model_id: Optional[str],
        api_base: Optional[str],
        api_provider: str,
    ):
        self.set_litellm_deployment_state(
            1, litellm_model_name, model_id, api_base, api_provider
        )

    def set_deployment_complete_outage(
        self,
        litellm_model_name: str,
        model_id: Optional[str],
        api_base: Optional[str],
        api_provider: str,
    ):
        self.set_litellm_deployment_state(
            2, litellm_model_name, model_id, api_base, api_provider
        )

    def increment_deployment_cooled_down(
        self,
        litellm_model_name: str,
        model_id: str,
        api_base: str,
        api_provider: str,
        exception_status: str,
    ):
        """
        increment metric when litellm.Router / load balancing logic places a deployment in cool down
        """
        self.litellm_deployment_cooled_down.labels(
            _sanitize_prometheus_label_value(litellm_model_name),
            _sanitize_prometheus_label_value(model_id),
            _sanitize_prometheus_label_value(api_base),
            _sanitize_prometheus_label_value(api_provider),
            _sanitize_prometheus_label_value(exception_status),
        ).inc()

    def increment_callback_logging_failure(
        self,
        callback_name: str,
    ):
        """
        Increment metric when logging to a callback fails (e.g., s3_v2, langfuse, etc.)
        """
        self.litellm_callback_logging_failures_metric.labels(
            callback_name=callback_name
        ).inc()

    def track_provider_remaining_budget(
        self, provider: str, spend: float, budget_limit: float
    ):
        """
        Track provider remaining budget in Prometheus
        """
        self.litellm_provider_remaining_budget_metric.labels(provider).set(
            self._safe_get_remaining_budget(
                max_budget=budget_limit,
                spend=spend,
            )
        )

    def _safe_get_remaining_budget(
        self, max_budget: Optional[float], spend: Optional[float]
    ) -> float:
        if max_budget is None:
            return float("inf")

        if spend is None:
            return max_budget

        return max_budget - spend

    async def _initialize_budget_metrics(
        self,
        data_fetch_function: Callable[..., Awaitable[Tuple[List[Any], Optional[int]]]],
        set_metrics_function: Callable[[List[Any]], Awaitable[None]],
        data_type: Literal["teams", "keys", "users"],
    ):
        """
        Generic method to initialize budget metrics for teams or API keys.

        Args:
            data_fetch_function: Function to fetch data with pagination.
            set_metrics_function: Function to set metrics for the fetched data.
            data_type: String representing the type of data ("teams" or "keys") for logging purposes.
        """
        from litellm.proxy.proxy_server import prisma_client

        if prisma_client is None:
            return

        try:
            page = 1
            page_size = 50
            data, total_count = await data_fetch_function(
                page_size=page_size, page=page
            )

            if total_count is None:
                total_count = len(data)

            # Calculate total pages needed
            total_pages = (total_count + page_size - 1) // page_size

            # Set metrics for first page of data
            await set_metrics_function(data)

            # Get and set metrics for remaining pages
            for page in range(2, total_pages + 1):
                data, _ = await data_fetch_function(page_size=page_size, page=page)
                await set_metrics_function(data)

        except Exception as e:
            verbose_logger.exception(
                f"Error initializing {data_type} budget metrics: {str(e)}"
            )

    async def _initialize_team_budget_metrics(self):
        """
        Initialize team budget metrics by reusing the generic pagination logic.
        """
        from litellm.proxy.management_endpoints.team_endpoints import (
            get_paginated_teams,
        )
        from litellm.proxy.proxy_server import prisma_client

        if prisma_client is None:
            verbose_logger.debug(
                "Prometheus: skipping team metrics initialization, DB not initialized"
            )
            return

        async def fetch_teams(
            page_size: int, page: int
        ) -> Tuple[List[LiteLLM_TeamTable], Optional[int]]:
            teams, total_count = await get_paginated_teams(
                prisma_client=prisma_client, page_size=page_size, page=page
            )
            if total_count is None:
                total_count = len(teams)
            return teams, total_count

        await self._initialize_budget_metrics(
            data_fetch_function=fetch_teams,
            set_metrics_function=self._set_team_list_budget_metrics,
            data_type="teams",
        )

    async def _initialize_api_key_budget_metrics(self):
        """
        Initialize API key budget metrics by reusing the generic pagination logic.
        """
        from typing import Union

        from litellm.constants import UI_SESSION_TOKEN_TEAM_ID
        from litellm.proxy.management_endpoints.key_management_endpoints import (
            _list_key_helper,
        )
        from litellm.proxy.proxy_server import prisma_client

        if prisma_client is None:
            verbose_logger.debug(
                "Prometheus: skipping key metrics initialization, DB not initialized"
            )
            return

        async def fetch_keys(
            page_size: int, page: int
        ) -> Tuple[
            List[Union[str, UserAPIKeyAuth, LiteLLM_DeletedVerificationToken]],
            Optional[int],
        ]:
            key_list_response = await _list_key_helper(
                prisma_client=prisma_client,
                page=page,
                size=page_size,
                user_id=None,
                team_id=None,
                key_alias=None,
                key_hash=None,
                exclude_team_id=UI_SESSION_TOKEN_TEAM_ID,
                return_full_object=True,
                organization_id=None,
            )
            keys = key_list_response.get("keys", [])
            total_count = key_list_response.get("total_count")
            if total_count is None:
                total_count = len(keys)
            return keys, total_count

        await self._initialize_budget_metrics(
            data_fetch_function=fetch_keys,
            set_metrics_function=self._set_key_list_budget_metrics,
            data_type="keys",
        )

    async def _initialize_user_budget_metrics(self):
        """
        Initialize user budget metrics by reusing the generic pagination logic.
        """
        from litellm.proxy._types import LiteLLM_UserTable
        from litellm.proxy.proxy_server import prisma_client

        if prisma_client is None:
            verbose_logger.debug(
                "Prometheus: skipping user metrics initialization, DB not initialized"
            )
            return

        async def fetch_users(
            page_size: int, page: int
        ) -> Tuple[List[LiteLLM_UserTable], Optional[int]]:
            skip = (page - 1) * page_size
            users = await prisma_client.db.litellm_usertable.find_many(
                skip=skip,
                take=page_size,
                order={"created_at": "desc"},
            )
            total_count = await prisma_client.db.litellm_usertable.count()
            return users, total_count

        await self._initialize_budget_metrics(
            data_fetch_function=fetch_users,
            set_metrics_function=self._set_user_list_budget_metrics,
            data_type="users",
        )

    async def initialize_remaining_budget_metrics(self):
        """
        Handler for initializing remaining budget metrics for all teams to avoid metric discrepancies.

        Runs when prometheus logger starts up.

        - If redis cache is available, we use the pod lock manager to acquire a lock and initialize the metrics.
            - Ensures only one pod emits the metrics at a time.
        - If redis cache is not available, we initialize the metrics directly.
        """
        from litellm.constants import PROMETHEUS_EMIT_BUDGET_METRICS_JOB_NAME
        from litellm.proxy.proxy_server import proxy_logging_obj

        pod_lock_manager = proxy_logging_obj.db_spend_update_writer.pod_lock_manager

        # if using redis, ensure only one pod emits the metrics at a time
        if pod_lock_manager and pod_lock_manager.redis_cache:
            if await pod_lock_manager.acquire_lock(
                cronjob_id=PROMETHEUS_EMIT_BUDGET_METRICS_JOB_NAME
            ):
                try:
                    await self._initialize_remaining_budget_metrics()
                finally:
                    await pod_lock_manager.release_lock(
                        cronjob_id=PROMETHEUS_EMIT_BUDGET_METRICS_JOB_NAME
                    )
        else:
            # if not using redis, initialize the metrics directly
            await self._initialize_remaining_budget_metrics()

    async def _initialize_remaining_budget_metrics(self):
        """
        Helper to initialize remaining budget metrics for all teams, API keys, and users.
        """
        verbose_logger.debug("Emitting key, team, user budget metrics....")
        await self._initialize_team_budget_metrics()
        await self._initialize_api_key_budget_metrics()
        await self._initialize_user_budget_metrics()
        await self._initialize_user_and_team_count_metrics()

    async def _initialize_user_and_team_count_metrics(self):
        """
        Initialize user and team count metrics by querying the database.

        Updates:
        - litellm_total_users: Total count of users in the database
        - litellm_teams_count: Total count of teams in the database
        """
        from litellm.proxy.proxy_server import prisma_client

        if prisma_client is None:
            verbose_logger.debug(
                "Prometheus: skipping user/team count metrics initialization, DB not initialized"
            )
            return

        try:
            # Get total user count
            total_users = await prisma_client.db.litellm_usertable.count()
            self.litellm_total_users_metric.set(total_users)
            verbose_logger.debug(
                f"Prometheus: set litellm_total_users to {total_users}"
            )

            # Get total team count
            total_teams = await prisma_client.db.litellm_teamtable.count()
            self.litellm_teams_count_metric.set(total_teams)
            verbose_logger.debug(
                f"Prometheus: set litellm_teams_count to {total_teams}"
            )
        except Exception as e:
            verbose_logger.exception(
                f"Error initializing user/team count metrics: {str(e)}"
            )

    async def _set_key_list_budget_metrics(
        self, keys: List[Union[str, UserAPIKeyAuth]]
    ):
        """Helper function to set budget metrics for a list of keys"""
        for key in keys:
            if isinstance(key, UserAPIKeyAuth):
                self._set_key_budget_metrics(key)

    async def _set_team_list_budget_metrics(self, teams: List[LiteLLM_TeamTable]):
        """Helper function to set budget metrics for a list of teams"""
        for team in teams:
            self._set_team_budget_metrics(team)

    async def _set_user_list_budget_metrics(self, users: List[LiteLLM_UserTable]):
        """Helper function to set budget metrics for a list of users"""
        for user in users:
            self._set_user_budget_metrics(user)

    async def _set_team_budget_metrics_after_api_request(
        self,
        user_api_team: Optional[str],
        user_api_team_alias: Optional[str],
        team_spend: Optional[float],
        team_max_budget: Optional[float],
        response_cost: float,
    ):
        """
        Set team budget metrics after an LLM API request

        - Assemble a LiteLLM_TeamTable object
            - looks up team info from db if not available in metadata
        - Set team budget metrics
        """
        if user_api_team:
            team_object = await self._assemble_team_object(
                team_id=user_api_team,
                team_alias=user_api_team_alias or "",
                spend=team_spend,
                max_budget=team_max_budget,
                response_cost=response_cost,
            )

            self._set_team_budget_metrics(team_object)

    async def _assemble_team_object(
        self,
        team_id: str,
        team_alias: str,
        spend: Optional[float],
        max_budget: Optional[float],
        response_cost: float,
    ) -> LiteLLM_TeamTable:
        """
        Assemble a LiteLLM_TeamTable object

        for fields not available in metadata, we fetch from db
        Fields not available in metadata:
        - `budget_reset_at`
        """
        from litellm.proxy.auth.auth_checks import get_team_object
        from litellm.proxy.proxy_server import prisma_client, user_api_key_cache

        _total_team_spend = (spend or 0) + response_cost
        team_object = LiteLLM_TeamTable(
            team_id=team_id,
            team_alias=team_alias,
            spend=_total_team_spend,
            max_budget=max_budget,
        )
        try:
            team_info = await get_team_object(
                team_id=team_id,
                prisma_client=prisma_client,
                user_api_key_cache=user_api_key_cache,
            )
        except Exception as e:
            verbose_logger.debug(
                f"[Non-Blocking] Prometheus: Error getting team info: {str(e)}"
            )
            return team_object

        if team_info:
            team_object.budget_reset_at = team_info.budget_reset_at
            if team_object.max_budget is None and team_info.max_budget is not None:
                team_object.max_budget = team_info.max_budget

        return team_object

    def _set_team_budget_metrics(
        self,
        team: LiteLLM_TeamTable,
    ):
        """
        Set team budget metrics for a single team

        - Remaining Budget
        - Max Budget
        - Budget Reset At
        """
        enum_values = UserAPIKeyLabelValues(
            team=team.team_id,
            team_alias=team.team_alias or "",
        )

        _labels = prometheus_label_factory(
            supported_enum_labels=self.get_labels_for_metric(
                metric_name="litellm_remaining_team_budget_metric"
            ),
            enum_values=enum_values,
        )
        self.litellm_remaining_team_budget_metric.labels(**_labels).set(
            self._safe_get_remaining_budget(
                max_budget=team.max_budget,
                spend=team.spend,
            )
        )

        if team.max_budget is not None:
            _labels = prometheus_label_factory(
                supported_enum_labels=self.get_labels_for_metric(
                    metric_name="litellm_team_max_budget_metric"
                ),
                enum_values=enum_values,
            )
            self.litellm_team_max_budget_metric.labels(**_labels).set(team.max_budget)

        if team.budget_reset_at is not None:
            _labels = prometheus_label_factory(
                supported_enum_labels=self.get_labels_for_metric(
                    metric_name="litellm_team_budget_remaining_hours_metric"
                ),
                enum_values=enum_values,
            )
            self.litellm_team_budget_remaining_hours_metric.labels(**_labels).set(
                self._get_remaining_hours_for_budget_reset(
                    budget_reset_at=team.budget_reset_at
                )
            )

    def _set_key_budget_metrics(self, user_api_key_dict: UserAPIKeyAuth):
        """
        Set virtual key budget metrics

        - Remaining Budget
        - Max Budget
        - Budget Reset At
        """
        enum_values = UserAPIKeyLabelValues(
            hashed_api_key=user_api_key_dict.token,
            api_key_alias=user_api_key_dict.key_alias or "",
        )
        _labels = prometheus_label_factory(
            supported_enum_labels=self.get_labels_for_metric(
                metric_name="litellm_remaining_api_key_budget_metric"
            ),
            enum_values=enum_values,
        )
        self.litellm_remaining_api_key_budget_metric.labels(**_labels).set(
            self._safe_get_remaining_budget(
                max_budget=user_api_key_dict.max_budget,
                spend=user_api_key_dict.spend,
            )
        )

        if user_api_key_dict.max_budget is not None:
            _labels = prometheus_label_factory(
                supported_enum_labels=self.get_labels_for_metric(
                    metric_name="litellm_api_key_max_budget_metric"
                ),
                enum_values=enum_values,
            )
            self.litellm_api_key_max_budget_metric.labels(**_labels).set(
                user_api_key_dict.max_budget
            )

        if user_api_key_dict.budget_reset_at is not None:
            self.litellm_api_key_budget_remaining_hours_metric.labels(**_labels).set(
                self._get_remaining_hours_for_budget_reset(
                    budget_reset_at=user_api_key_dict.budget_reset_at
                )
            )

    async def _set_api_key_budget_metrics_after_api_request(
        self,
        user_api_key: Optional[str],
        user_api_key_alias: Optional[str],
        response_cost: float,
        key_max_budget: Optional[float],
        key_spend: Optional[float],
    ):
        if user_api_key:
            user_api_key_dict = await self._assemble_key_object(
                user_api_key=user_api_key,
                user_api_key_alias=user_api_key_alias or "",
                key_max_budget=key_max_budget,
                key_spend=key_spend,
                response_cost=response_cost,
            )
            self._set_key_budget_metrics(user_api_key_dict)

    async def _assemble_key_object(
        self,
        user_api_key: str,
        user_api_key_alias: str,
        key_max_budget: Optional[float],
        key_spend: Optional[float],
        response_cost: float,
    ) -> UserAPIKeyAuth:
        """
        Assemble a UserAPIKeyAuth object
        """
        from litellm.proxy.auth.auth_checks import get_key_object
        from litellm.proxy.proxy_server import prisma_client, user_api_key_cache

        _total_key_spend = (key_spend or 0) + response_cost
        user_api_key_dict = UserAPIKeyAuth(
            token=user_api_key,
            key_alias=user_api_key_alias,
            max_budget=key_max_budget,
            spend=_total_key_spend,
        )
        try:
            if user_api_key_dict.token:
                key_object = await get_key_object(
                    hashed_token=user_api_key_dict.token,
                    prisma_client=prisma_client,
                    user_api_key_cache=user_api_key_cache,
                )
                if key_object:
                    user_api_key_dict.budget_reset_at = key_object.budget_reset_at
        except Exception as e:
            verbose_logger.debug(
                f"[Non-Blocking] Prometheus: Error getting key info: {str(e)}"
            )

        return user_api_key_dict

    async def _set_user_budget_metrics_after_api_request(
        self,
        user_id: Optional[str],
        user_spend: Optional[float],
        user_max_budget: Optional[float],
        response_cost: float,
    ):
        """
        Set user budget metrics after an LLM API request

        - Assemble a LiteLLM_UserTable object
            - looks up user info from db if not available in metadata
        - Set user budget metrics
        """
        if user_id:
            user_object = await self._assemble_user_object(
                user_id=user_id,
                spend=user_spend,
                max_budget=user_max_budget,
                response_cost=response_cost,
            )

            self._set_user_budget_metrics(user_object)

    async def _assemble_user_object(
        self,
        user_id: str,
        spend: Optional[float],
        max_budget: Optional[float],
        response_cost: float,
    ) -> LiteLLM_UserTable:
        """
        Assemble a LiteLLM_UserTable object

        for fields not available in metadata, we fetch from db
        Fields not available in metadata:
        - `budget_reset_at`
        """
        from litellm.proxy.auth.auth_checks import get_user_object
        from litellm.proxy.proxy_server import prisma_client, user_api_key_cache

        _total_user_spend = (spend or 0) + response_cost
        user_object = LiteLLM_UserTable(
            user_id=user_id,
            spend=_total_user_spend,
            max_budget=max_budget,
        )
        try:
            # Note: Setting check_db_only=True bypasses cache and hits DB on every request,
            # causing huge latency increase and CPU spikes. Keep check_db_only=False.
            user_info = await get_user_object(
                user_id=user_id,
                prisma_client=prisma_client,
                user_api_key_cache=user_api_key_cache,
                user_id_upsert=False,
                check_db_only=False,
            )
        except Exception as e:
            verbose_logger.debug(
                f"[Non-Blocking] Prometheus: Error getting user info: {str(e)}"
            )
            return user_object

        if user_info:
            user_object.budget_reset_at = user_info.budget_reset_at
            if user_object.max_budget is None and user_info.max_budget is not None:
                user_object.max_budget = user_info.max_budget

        return user_object

    def _set_user_budget_metrics(
        self,
        user: LiteLLM_UserTable,
    ):
        """
        Set user budget metrics for a single user

        - Remaining Budget
        - Max Budget
        - Budget Reset At
        """
        enum_values = UserAPIKeyLabelValues(
            user=user.user_id,
        )

        _labels = prometheus_label_factory(
            supported_enum_labels=self.get_labels_for_metric(
                metric_name="litellm_remaining_user_budget_metric"
            ),
            enum_values=enum_values,
        )
        self.litellm_remaining_user_budget_metric.labels(**_labels).set(
            self._safe_get_remaining_budget(
                max_budget=user.max_budget,
                spend=user.spend,
            )
        )

        if user.max_budget is not None:
            _labels = prometheus_label_factory(
                supported_enum_labels=self.get_labels_for_metric(
                    metric_name="litellm_user_max_budget_metric"
                ),
                enum_values=enum_values,
            )
            self.litellm_user_max_budget_metric.labels(**_labels).set(user.max_budget)

        if user.budget_reset_at is not None:
            _labels = prometheus_label_factory(
                supported_enum_labels=self.get_labels_for_metric(
                    metric_name="litellm_user_budget_remaining_hours_metric"
                ),
                enum_values=enum_values,
            )
            self.litellm_user_budget_remaining_hours_metric.labels(**_labels).set(
                self._get_remaining_hours_for_budget_reset(
                    budget_reset_at=user.budget_reset_at
                )
            )

    def _get_remaining_hours_for_budget_reset(self, budget_reset_at: datetime) -> float:
        """
        Get remaining hours for budget reset
        """
        return (
            budget_reset_at - datetime.now(budget_reset_at.tzinfo)
        ).total_seconds() / 3600

    def _safe_duration_seconds(
        self,
        start_time: Any,
        end_time: Any,
    ) -> Optional[float]:
        """
        Compute the duration in seconds between two objects.

        Returns the duration as a float if both start and end are instances of datetime,
        otherwise returns None.
        """
        if isinstance(start_time, datetime) and isinstance(end_time, datetime):
            return (end_time - start_time).total_seconds()
        return None

    @staticmethod
    def initialize_budget_metrics_cron_job(scheduler: AsyncIOScheduler):
        """
        Initialize budget metrics as a cron job. This job runs every `PROMETHEUS_BUDGET_METRICS_REFRESH_INTERVAL_MINUTES` minutes.

        It emits the current remaining budget metrics for all Keys and Teams.
        """
        from litellm.constants import PROMETHEUS_BUDGET_METRICS_REFRESH_INTERVAL_MINUTES
        from litellm.integrations.custom_logger import CustomLogger

        prometheus_loggers: List[
            CustomLogger
        ] = litellm.logging_callback_manager.get_custom_loggers_for_type(
            callback_type=PrometheusLogger
        )
        # we need to get the initialized prometheus logger instance(s) and call logger.initialize_remaining_budget_metrics() on them
        verbose_logger.debug("found %s prometheus loggers", len(prometheus_loggers))
        if len(prometheus_loggers) > 0:
            prometheus_logger = cast(PrometheusLogger, prometheus_loggers[0])
            verbose_logger.debug(
                "Initializing remaining budget metrics as a cron job executing every %s minutes"
                % PROMETHEUS_BUDGET_METRICS_REFRESH_INTERVAL_MINUTES
            )
            scheduler.add_job(
                prometheus_logger.initialize_remaining_budget_metrics,
                "interval",
                minutes=PROMETHEUS_BUDGET_METRICS_REFRESH_INTERVAL_MINUTES,
                # REMOVED jitter parameter - major cause of memory leak
                id="prometheus_budget_metrics_job",
                replace_existing=True,
            )

    @staticmethod
    def _mount_metrics_endpoint():
        """
        Mount the Prometheus metrics endpoint with optional authentication.

        Args:
            require_auth (bool, optional): Whether to require authentication for the metrics endpoint.
                                        Defaults to False.
        """
        from prometheus_client import make_asgi_app

        from litellm._logging import verbose_proxy_logger
        from litellm.proxy.proxy_server import app

        # Create metrics ASGI app
        if "PROMETHEUS_MULTIPROC_DIR" in os.environ:
            from prometheus_client import CollectorRegistry, multiprocess

            registry = CollectorRegistry()
            multiprocess.MultiProcessCollector(registry)
            metrics_app = make_asgi_app(registry)
        else:
            metrics_app = make_asgi_app()

        # Mount the metrics app to the app
        app.mount("/metrics", metrics_app)
        verbose_proxy_logger.debug(
            "Starting Prometheus Metrics on /metrics (no authentication)"
        )


def prometheus_label_factory(
    supported_enum_labels: List[str],
    enum_values: UserAPIKeyLabelValues,
    tag: Optional[str] = None,
) -> dict:
    """
    Returns a dictionary of label + values for prometheus.

    Ensures end_user param is not sent to prometheus if it is not supported.
    """
    # Extract dictionary from Pydantic object
    enum_dict = enum_values.model_dump()

    # Filter supported labels and sanitize values to prevent breaking
    # the Prometheus text format (e.g. U+2028 Line Separator in label values)
    filtered_labels = {
        label: _sanitize_prometheus_label_value(value)
        for label, value in enum_dict.items()
        if label in supported_enum_labels
    }

    if UserAPIKeyLabelNames.END_USER.value in filtered_labels:
        get_end_user_id_for_cost_tracking = _get_cached_end_user_id_for_cost_tracking()

        filtered_labels["end_user"] = get_end_user_id_for_cost_tracking(
            litellm_params={"user_api_key_end_user_id": enum_values.end_user},
            service_type="prometheus",
        )

    if enum_values.custom_metadata_labels is not None:
        for key, value in enum_values.custom_metadata_labels.items():
            # check sanitized key
            sanitized_key = _sanitize_prometheus_label_name(key)
            if sanitized_key in supported_enum_labels:
                filtered_labels[sanitized_key] = _sanitize_prometheus_label_value(value)

    # Add custom tags if configured
    if enum_values.tags is not None:
        custom_tag_labels = get_custom_labels_from_tags(enum_values.tags)
        for key, value in custom_tag_labels.items():
            if key in supported_enum_labels:
                filtered_labels[key] = _sanitize_prometheus_label_value(value)

    for label in supported_enum_labels:
        if label not in filtered_labels:
            filtered_labels[label] = None

    return filtered_labels


def get_custom_labels_from_metadata(metadata: dict) -> Dict[str, str]:
    """
    Get custom labels from metadata
    """
    keys = litellm.custom_prometheus_metadata_labels
    if keys is None or len(keys) == 0:
        return {}

    result: Dict[str, str] = {}

    for key in keys:
        # Split the dot notation key into parts
        original_key = key
        key = key.replace("metadata.", "", 1) if key.startswith("metadata.") else key

        keys_parts = key.split(".")
        # Traverse through the dictionary using the parts
        value: Any = metadata
        for part in keys_parts:
            if isinstance(value, dict):
                value = value.get(part, None)  # Get the value, return None if not found
            else:
                value = None
            if value is None:
                break

        if value is not None and isinstance(value, str):
            result[original_key.replace(".", "_")] = value

    return result


def _tag_matches_wildcard_configured_pattern(
    tags: List[str], configured_tag: str
) -> bool:
    """
    Check if any of the request tags matches a wildcard configured pattern

    Args:
        tags: List[str] - The request tags
        configured_tag: str - The configured tag

    Returns:
        bool - True if any of the request tags matches the configured tag, False otherwise

    e.g.
    tags = ["User-Agent: curl/7.68.0", "User-Agent: python-requests/2.28.1", "prod"]
    configured_tag = "User-Agent: curl/*"
    _tag_matches_wildcard_configured_pattern(tags=tags, configured_tag=configured_tag) # True

    configured_tag = "User-Agent: python-requests/*"
    _tag_matches_wildcard_configured_pattern(tags=tags, configured_tag=configured_tag) # True

    configured_tag = "gm"
    _tag_matches_wildcard_configured_pattern(tags=tags, configured_tag=configured_tag) # False
    """
    import re

    from litellm.router_utils.pattern_match_deployments import PatternMatchRouter

    pattern_router = PatternMatchRouter()
    regex_pattern = pattern_router._pattern_to_regex(configured_tag)
    return any(re.match(pattern=regex_pattern, string=tag) for tag in tags)


def get_custom_labels_from_tags(tags: List[str]) -> Dict[str, str]:
    """
    Get custom labels from tags based on admin configuration.

    Supports both exact matches and wildcard patterns:
    - Exact match: "prod" matches "prod" exactly
    - Wildcard pattern: "User-Agent: curl/*" matches "User-Agent: curl/7.68.0"

    Reuses PatternMatchRouter for wildcard pattern matching.

    Returns dict of label_name: "true" if the tag matches the configured tag, "false" otherwise

    {
        "tag_User-Agent_curl": "true",
        "tag_User-Agent_python_requests": "false",
        "tag_Environment_prod": "true",
        "tag_Environment_dev": "false",
        "tag_Service_api_gateway_v2": "true",
        "tag_Service_web_app_v1": "false",
    }
    """

    from litellm.types.integrations.prometheus import _sanitize_prometheus_label_name

    configured_tags = litellm.custom_prometheus_tags
    if configured_tags is None or len(configured_tags) == 0:
        return {}

    result: Dict[str, str] = {}

    for configured_tag in configured_tags:
        label_name = _sanitize_prometheus_label_name(f"tag_{configured_tag}")

        # Check for exact match first (backwards compatibility)
        if configured_tag in tags:
            result[label_name] = "true"
            continue

        # Use PatternMatchRouter for wildcard pattern matching
        if "*" in configured_tag and _tag_matches_wildcard_configured_pattern(
            tags=tags, configured_tag=configured_tag
        ):
            result[label_name] = "true"
            continue

        # No match found
        result[label_name] = "false"

    return result
