package config

import (
	"time"

	"github.com/spf13/viper"
)

// setDefaults sets all default values using viper.
func setDefaults() {
	viper.SetDefault("run_mode", RunModeStandard)

	// Server
	viper.SetDefault("server.host", "0.0.0.0")
	viper.SetDefault("server.port", 8080)
	viper.SetDefault("server.mode", "release")
	viper.SetDefault("server.frontend_url", "")
	viper.SetDefault("server.read_header_timeout", 30)
	viper.SetDefault("server.idle_timeout", 120)
	viper.SetDefault("server.trusted_proxies", []string{})
	viper.SetDefault("server.max_request_body_size", int64(256*1024*1024))
	// H2C
	viper.SetDefault("server.h2c.enabled", false)
	viper.SetDefault("server.h2c.max_concurrent_streams", uint32(50))
	viper.SetDefault("server.h2c.idle_timeout", 75)
	viper.SetDefault("server.h2c.max_read_frame_size", 1<<20)
	viper.SetDefault("server.h2c.max_upload_buffer_per_connection", 2<<20)
	viper.SetDefault("server.h2c.max_upload_buffer_per_stream", 512<<10)

	// Log
	viper.SetDefault("log.level", "info")
	viper.SetDefault("log.format", "console")
	viper.SetDefault("log.service_name", "sub2api")
	viper.SetDefault("log.env", "production")
	viper.SetDefault("log.caller", true)
	viper.SetDefault("log.stacktrace_level", "error")
	viper.SetDefault("log.output.to_stdout", true)
	viper.SetDefault("log.output.to_file", true)
	viper.SetDefault("log.output.file_path", "")
	viper.SetDefault("log.rotation.max_size_mb", 100)
	viper.SetDefault("log.rotation.max_backups", 10)
	viper.SetDefault("log.rotation.max_age_days", 7)
	viper.SetDefault("log.rotation.compress", true)
	viper.SetDefault("log.rotation.local_time", true)
	viper.SetDefault("log.sampling.enabled", false)
	viper.SetDefault("log.sampling.initial", 100)
	viper.SetDefault("log.sampling.thereafter", 100)

	// CORS
	viper.SetDefault("cors.allowed_origins", []string{})
	viper.SetDefault("cors.allow_credentials", true)

	// Security
	setSecurityDefaults()

	// Billing
	viper.SetDefault("billing.circuit_breaker.enabled", true)
	viper.SetDefault("billing.circuit_breaker.failure_threshold", 5)
	viper.SetDefault("billing.circuit_breaker.reset_timeout_seconds", 30)
	viper.SetDefault("billing.circuit_breaker.half_open_requests", 3)

	viper.SetDefault("turnstile.required", false)

	// LinuxDo Connect OAuth
	setLinuxDoDefaults()

	// Generic OIDC OAuth
	setOIDCDefaults()

	// Database
	viper.SetDefault("database.host", "localhost")
	viper.SetDefault("database.port", 5432)
	viper.SetDefault("database.user", "postgres")
	viper.SetDefault("database.password", "postgres")
	viper.SetDefault("database.dbname", "sub2api")
	viper.SetDefault("database.sslmode", "prefer")
	viper.SetDefault("database.max_open_conns", 256)
	viper.SetDefault("database.max_idle_conns", 128)
	viper.SetDefault("database.conn_max_lifetime_minutes", 30)
	viper.SetDefault("database.conn_max_idle_time_minutes", 5)

	// Redis
	viper.SetDefault("redis.host", "localhost")
	viper.SetDefault("redis.port", 6379)
	viper.SetDefault("redis.password", "")
	viper.SetDefault("redis.db", 0)
	viper.SetDefault("redis.dial_timeout_seconds", 5)
	viper.SetDefault("redis.read_timeout_seconds", 3)
	viper.SetDefault("redis.write_timeout_seconds", 3)
	viper.SetDefault("redis.pool_size", 1024)
	viper.SetDefault("redis.min_idle_conns", 128)
	viper.SetDefault("redis.enable_tls", false)

	// Ops (vNext)
	viper.SetDefault("ops.enabled", true)
	viper.SetDefault("ops.use_preaggregated_tables", true)
	viper.SetDefault("ops.cleanup.enabled", true)
	viper.SetDefault("ops.cleanup.schedule", "0 2 * * *")
	viper.SetDefault("ops.cleanup.error_log_retention_days", 30)
	viper.SetDefault("ops.cleanup.minute_metrics_retention_days", 30)
	viper.SetDefault("ops.cleanup.hourly_metrics_retention_days", 30)
	viper.SetDefault("ops.aggregation.enabled", true)
	viper.SetDefault("ops.metrics_collector_cache.enabled", true)
	viper.SetDefault("ops.metrics_collector_cache.ttl", 65*time.Second)

	// JWT
	viper.SetDefault("jwt.secret", "")
	viper.SetDefault("jwt.expire_hour", 24)
	viper.SetDefault("jwt.access_token_expire_minutes", 0)
	viper.SetDefault("jwt.refresh_token_expire_days", 30)
	viper.SetDefault("jwt.refresh_window_minutes", 2)

	// TOTP
	viper.SetDefault("totp.encryption_key", "")

	// Default
	viper.SetDefault("default.admin_email", "")
	viper.SetDefault("default.admin_password", "")
	viper.SetDefault("default.user_concurrency", 5)
	viper.SetDefault("default.user_balance", 0)
	viper.SetDefault("default.api_key_prefix", "sk-")
	viper.SetDefault("default.rate_multiplier", 1.0)

	// RateLimit
	viper.SetDefault("rate_limit.overload_cooldown_minutes", 10)
	viper.SetDefault("rate_limit.oauth_401_cooldown_minutes", 10)

	// Pricing
	viper.SetDefault("pricing.remote_url", "https://raw.githubusercontent.com/Wei-Shaw/model-price-repo/main/model_prices_and_context_window.json")
	viper.SetDefault("pricing.hash_url", "https://raw.githubusercontent.com/Wei-Shaw/model-price-repo/main/model_prices_and_context_window.sha256")
	viper.SetDefault("pricing.data_dir", "./data")
	viper.SetDefault("pricing.fallback_file", "./resources/model-pricing/model_prices_and_context_window.json")
	viper.SetDefault("pricing.update_interval_hours", 24)
	viper.SetDefault("pricing.hash_check_interval_minutes", 10)

	viper.SetDefault("timezone", "Asia/Shanghai")

	// API Key auth cache
	viper.SetDefault("api_key_auth_cache.l1_size", 65535)
	viper.SetDefault("api_key_auth_cache.l1_ttl_seconds", 15)
	viper.SetDefault("api_key_auth_cache.l2_ttl_seconds", 300)
	viperSetDefault("api_key_auth_cache.negative_ttl_seconds", 30)
	viper.SetDefault("api_key_auth_cache.jitter_percent", 10)
	viper.SetDefault("api_key_auth_cache.singleflight", true)

	// Subscription auth L1 cache
	viper.SetDefault("subscription_cache.l1_size", 16384)
	viper.SetDefault("subscription_cache.l1_ttl_seconds", 10)
	viper.SetDefault("subscription_cache.jitter_percent", 10)

	// Dashboard cache
	viper.SetDefault("dashboard_cache.enabled", true)
	viper.SetDefault("dashboard_cache.key_prefix", "sub2api:")
	viper.SetDefault("dashboard_cache.stats_fresh_ttl_seconds", 15)
	viper.SetDefault("dashboard_cache.stats_ttl_seconds", 30)
	viper.SetDefault("dashboard_cache.stats_refresh_timeout_seconds", 30)

	// Dashboard aggregation
	viper.SetDefault("dashboard_aggregation.enabled", true)
	viper.SetDefault("dashboard_aggregation.interval_seconds", 60)
	viper.SetDefault("dashboard_aggregation.lookback_seconds", 120)
	viper.SetDefault("dashboard_aggregation.backfill_enabled", false)
	viper.SetDefault("dashboard_aggregation.backfill_max_days", 31)
	viper.SetDefault("dashboard_aggregation.retention.usage_logs_days", 90)
	viper.SetDefault("dashboard_aggregation.retention.usage_billing_dedup_days", 365)
	viper.SetDefault("dashboard_aggregation.retention.hourly_days", 180)
	viper.SetDefault("dashboard_aggregation.retention.daily_days", 730)
	viper.SetDefault("dashboard_aggregation.recompute_days", 2)

	// Usage cleanup task
	viper.SetDefault("usage_cleanup.enabled", true)
	viper.SetDefault("usage_cleanup.max_range_days", 31)
	viper.SetDefault("usage_cleanup.batch_size", 5000)
	viper.SetDefault("usage_cleanup.worker_interval_seconds", 10)
	viper.SetDefault("usage_cleanup.task_timeout_seconds", 1800)

	// Idempotency
	viper.SetDefault("idempotency.observe_only", true)
	viper.SetDefault("idempotency.default_ttl_seconds", 86400)
	viper.SetDefault("idempotency.system_operation_ttl_seconds", 3600)
	viper.SetDefault("idempotency.processing_timeout_seconds", 30)
	viper.SetDefault("idempotency.failed_retry_backoff_seconds", 5)
	viper.SetDefault("idempotency.max_stored_response_len", 64*1024)
	viper.SetDefault("idempotency.cleanup_interval_seconds", 60)
	viper.SetDefault("idempotency.cleanup_batch_size", 500)

	// Gateway defaults
	setGatewayDefaults()

	// Gemini OAuth
	viper.SetDefault("gemini.oauth.client_id", "")
	viper.SetDefault("gemini.oauth.client_secret", "")
	viper.SetDefault("gemini.oauth.scopes", "")
	viper.SetDefault("gemini.quota.policy", "")

	// Subscription Maintenance
	viper.SetDefault("subscription_maintenance.worker_count", 2)
	viper.SetDefault("subscription_maintenance.queue_size", 1024)

	// Concurrency
	viper.SetDefault("concurrency.ping_interval", 10)

	// TokenRefresh
	viper.SetDefault("token_refresh.enabled", true)
	viper.SetDefault("token_refresh.check_interval_minutes", 5)
	viper.SetDefault("token_refresh.refresh_before_expiry_hours", 0.5)
	viper.SetDefault("token_refresh.max_retries", 3)
	viper.SetDefault("token_refresh.retry_backoff_seconds", 2)
}

// NOTE: there was a typo in original code ("viperSetDefault" instead of "viper.SetDefault").
// Preserved here for exact compatibility.
func viperSetDefault(key string, value any) { viper.SetDefault(key, value) }