#!/usr/bin/env bash
set -euo pipefail

ROOT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")/../.." && pwd)"
THRESHOLD_FILE="${THRESHOLD_FILE:-$ROOT_DIR/tests/quality/coverage_thresholds.tsv}"
OUTPUT_DIR="${OUTPUT_DIR:-$(mktemp -d "/tmp/sub2api-cn-relay-manager-test-quality-XXXXXX")}"

fail() {
  echo "FAIL: $*" >&2
  exit 1
}

log() {
  echo "==> $*"
}

[[ -f "$THRESHOLD_FILE" ]] || fail "missing coverage threshold file: $THRESHOLD_FILE"
mkdir -p "$OUTPUT_DIR"

GOFMT_LOG="$OUTPUT_DIR/gofmt.txt"
GOVET_LOG="$OUTPUT_DIR/govet.txt"
INTEGRATION_LOG="$OUTPUT_DIR/integration.txt"
COVERAGE_LOG="$OUTPUT_DIR/coverage.txt"
COVERAGE_REPORT="$OUTPUT_DIR/coverage-report.md"

log "quality gate output dir: $OUTPUT_DIR"

log "running gofmt check"
gofmt -l . | tee "$GOFMT_LOG"
if [[ -s "$GOFMT_LOG" ]]; then
  fail "gofmt reported unformatted files"
fi

log "running go vet"
go vet ./... 2>&1 | tee "$GOVET_LOG"

log "running internal coverage"
go test -cover ./internal/... 2>&1 | tee "$COVERAGE_LOG"

log "running integration tests"
set +e
go test ./tests/integration/... -count=1 2>&1 | tee "$INTEGRATION_LOG"
integration_status=${PIPESTATUS[0]}
set -e
if [[ $integration_status -ne 0 ]]; then
  if grep -Eq 'socket: operation not permitted|failed to listen on a port' "$INTEGRATION_LOG"; then
    if [[ "${ALLOW_BLOCKED_INTEGRATION:-0}" == "1" ]]; then
      log "integration tests blocked by socket-restricted environment; continuing because ALLOW_BLOCKED_INTEGRATION=1"
    else
      fail "integration tests blocked by current environment socket restrictions; rerun in an unrestricted environment or set ALLOW_BLOCKED_INTEGRATION=1 for local triage"
    fi
  else
    fail "integration tests failed"
  fi
fi

log "evaluating coverage thresholds"

awk -v threshold_file="$THRESHOLD_FILE" -v report_file="$COVERAGE_REPORT" '
BEGIN {
  FS = "\t"
  while ((getline line < threshold_file) > 0) {
    if (line ~ /^#/ || line ~ /^[[:space:]]*$/) {
      continue
    }
    split(line, fields, "\t")
    package = fields[1]
    tier = fields[2]
    min_coverage = fields[3] + 0
    note = fields[4]
    expected[package] = min_coverage
    tier_by_package[package] = tier
    note_by_package[package] = note
  }
  close(threshold_file)
}
/^ok[[:space:]]+sub2api-cn-relay-manager\/internal\// {
  package = $2
  sub(/^sub2api-cn-relay-manager\//, "", package)
  pct = -1
  if (match($0, /coverage: [0-9.]+%/)) {
    pct_text = substr($0, RSTART + 10, RLENGTH - 11)
    pct = pct_text + 0
  }
  coverage[package] = pct
}
/^\?[[:space:]]+sub2api-cn-relay-manager\/internal\// {
  package = $2
  sub(/^sub2api-cn-relay-manager\//, "", package)
  coverage[package] = -1
}
END {
  print "# Coverage Gate Report" > report_file
  print "" >> report_file
  print "| Package | Tier | Threshold | Actual | Result | Note |" >> report_file
  print "|---|---|---:|---:|---|---|" >> report_file

  failures = 0
  warnings = 0

  for (package in expected) {
    actual = (package in coverage) ? coverage[package] : -1
    result = "missing"
    if (actual >= 0 && actual + 1e-9 >= expected[package]) {
      result = "pass"
    } else if (tier_by_package[package] == "watch") {
      result = "warn"
      warnings++
    } else {
      result = "fail"
      failures++
    }

    actual_text = (actual >= 0) ? sprintf("%.1f", actual) : "n/a"
    print "| " package " | " tier_by_package[package] " | " sprintf("%.1f", expected[package]) " | " actual_text " | " result " | " note_by_package[package] " |" >> report_file

    if (result == "fail") {
      printf("FAIL coverage: %s actual=%s threshold=%.1f\n", package, actual_text, expected[package]) > "/dev/stderr"
    } else if (result == "warn") {
      printf("WARN coverage: %s actual=%s threshold=%.1f\n", package, actual_text, expected[package]) > "/dev/stderr"
    }
  }

  print "" >> report_file
  print "- Warnings: " warnings >> report_file
  print "- Failures: " failures >> report_file

  if (failures > 0) {
    exit 2
  }
}
' "$COVERAGE_LOG"

log "coverage report: $COVERAGE_REPORT"
cat "$COVERAGE_REPORT"
log "quality gates passed"