# GoChat Prometheus Alert Rules
# Reference: Chatwoot production monitoring with Sidekiq queue alerts
# Adjust thresholds based on your deployment scale

groups:
  - name: gochat-app
    rules:
      # Application down
      - alert: GoChatAppDown
        expr: up{job="gochat"} == 0
        for: 1m
        labels:
          severity: critical
        annotations:
          summary: "GoChat application is down"
          description: "GoChat instance {{ $labels.instance }} has been down for more than 1 minute."

      # High error rate
      - alert: GoChatHighErrorRate
        expr: rate(http_requests_total{job="gochat", status=~"5.."}[5m]) / rate(http_requests_total{job="gochat"}[5m]) > 0.05
        for: 5m
        labels:
          severity: warning
        annotations:
          summary: "GoChat error rate above 5%"
          description: "Error rate is {{ $value | humanizePercentage }} over the last 5 minutes."

      # High memory usage
      - alert: GoChatHighMemory
        expr: gochat_go_memory_alloc_bytes / (1024 * 1024) > 400
        for: 5m
        labels:
          severity: warning
        annotations:
          summary: "GoChat memory usage above 400MB"
          description: "Memory allocation is {{ $value }}MB."

      # Too many goroutines
      - alert: GoChatHighGoroutines
        expr: gochat_go_goroutines > 1000
        for: 5m
        labels:
          severity: warning
        annotations:
          summary: "GoChat goroutine count above 1000"
          description: "{{ $value }} goroutines running."

  - name: gochat-infra
    rules:
      # PostgreSQL down
      - alert: GoChatPostgresDown
        expr: up{job="gochat-postgres"} == 0
        for: 1m
        labels:
          severity: critical
        annotations:
          summary: "PostgreSQL is down"

      # Redis down
      - alert: GoChatRedisDown
        expr: up{job="gochat-redis"} == 0
        for: 1m
        labels:
          severity: critical
        annotations:
          summary: "Redis is down"

      # Redis memory approaching limit
      - alert: GoChatRedisMemoryHigh
        expr: redis_memory_used_bytes / redis_memory_max_bytes > 0.8
        for: 5m
        labels:
          severity: warning
        annotations:
          summary: "Redis memory usage above 80%"

      # PostgreSQL connections exhausted
      - alert: GoChatPostgresConnectionsHigh
        expr: pg_stat_activity_count / pg_settings_max_connections > 0.8
        for: 5m
        labels:
          severity: warning
        annotations:
          summary: "PostgreSQL connection usage above 80%"