groups:
  - name: gochat-application
    rules:
      - alert: GoChatAppDown
        expr: up{job="gochat"} == 0
        for: 1m
        labels:
          severity: critical
        annotations:
          summary: GoChat application is down
          description: GoChat metrics have been unreachable for more than one minute.

      - alert: GoChatDatabaseReadinessFailed
        expr: probe_success{job="gochat-database-readiness"} == 0
        for: 1m
        labels:
          severity: critical
        annotations:
          summary: GoChat database readiness failed
          description: The application cannot complete its PostgreSQL dependency check.

      - alert: GoChatRedisReadinessFailed
        expr: probe_success{job="gochat-redis-readiness"} == 0
        for: 1m
        labels:
          severity: critical
        annotations:
          summary: GoChat Redis readiness failed
          description: The application cannot complete its Redis dependency check.

      - alert: GoChatHighErrorRate
        expr: |
          sum by (job, instance) (rate(http_request_errors_total{job="gochat"}[5m]))
            / sum by (job, instance) (rate(http_requests_total{job="gochat"}[5m])) > 0.05
          and sum by (job, instance) (rate(http_requests_total{job="gochat"}[5m])) > 0
        for: 5m
        labels:
          severity: warning
        annotations:
          summary: GoChat error rate above 5%
          description: Error rate is {{ $value | humanizePercentage }} over the last 5 minutes.

      - alert: GoChatHighMemory
        expr: gochat_go_memory_alloc_bytes / 1024 / 1024 > 400
        for: 5m
        labels:
          severity: warning
        annotations:
          summary: GoChat memory usage above 400 MB
          description: Allocated heap is {{ $value | humanize }} MB.

      - alert: GoChatHighGoroutines
        expr: gochat_go_goroutines > 1000
        for: 5m
        labels:
          severity: warning
        annotations:
          summary: GoChat goroutine count above 1000
          description: GoChat has {{ $value | humanize }} goroutines.

  - name: gochat-workers
    rules:
      - alert: GoChatWorkerDown
        expr: |
          time() - max(container_last_seen{container_label_com_docker_compose_service="worker"}) > 60
          or absent(container_last_seen{container_label_com_docker_compose_service="worker"})
        for: 1m
        labels:
          severity: critical
        annotations:
          summary: GoChat worker is down
          description: cAdvisor has not observed a production worker container for more than one minute.

      - alert: GoChatCriticalQueueBacklog
        expr: |
          sum by (queue) (gochat_background_jobs_total{queue=~"critical|high",status=~"queued|retrying"}) > 25
          or max by (queue) (gochat_background_jobs_oldest_seconds{queue=~"critical|high",status=~"queued|retrying"}) > 300
        for: 5m
        labels:
          severity: critical
        annotations:
          summary: Critical background queue is delayed
          description: Queue {{ $labels.queue }} exceeds 25 ready jobs or its oldest job is over five minutes old.

      - alert: GoChatWorkerJobsStuck
        expr: max by (queue) (gochat_background_jobs_oldest_seconds{status="running"}) > 900
        for: 5m
        labels:
          severity: critical
        annotations:
          summary: Background jobs are stuck
          description: Queue {{ $labels.queue }} has a running job older than 15 minutes.

  - name: gochat-infrastructure
    rules:
      - alert: GoChatPostgresExporterDown
        expr: up{job="postgres-exporter"} == 0
        for: 1m
        labels:
          severity: critical
        annotations:
          summary: PostgreSQL exporter is down
          description: Prometheus cannot scrape the PostgreSQL exporter.

      - alert: GoChatRedisExporterDown
        expr: up{job="redis-exporter"} == 0
        for: 1m
        labels:
          severity: critical
        annotations:
          summary: Redis exporter is down
          description: Prometheus cannot scrape the Redis exporter.

      - alert: GoChatRedisMemoryHigh
        expr: redis_memory_max_bytes > 0 and redis_memory_used_bytes / redis_memory_max_bytes > 0.8
        for: 5m
        labels:
          severity: warning
        annotations:
          summary: Redis memory usage above 80%
          description: Redis is approaching its configured memory ceiling.

      - alert: GoChatPostgresConnectionsHigh
        expr: sum(pg_stat_activity_count) / max(pg_settings_max_connections) > 0.8
        for: 5m
        labels:
          severity: warning
        annotations:
          summary: PostgreSQL connection usage above 80%
          description: PostgreSQL is approaching its connection limit.

      - alert: GoChatBackupStale
        expr: |
          time() - gochat_backup_last_success_timestamp_seconds > gochat_backup_rpo_target_seconds
          or absent(gochat_backup_last_success_timestamp_seconds)
        for: 5m
        labels:
          severity: critical
        annotations:
          summary: GoChat backup is stale
          description: No successful encrypted off-site backup exists inside the declared RPO.

      - alert: GoChatAlertmanagerDown
        expr: up{job="alertmanager"} == 0
        for: 1m
        labels:
          severity: critical
        annotations:
          summary: Alertmanager is down
          description: Prometheus cannot deliver notifications to Alertmanager.

      - alert: ShangwutongReadinessFailed
        expr: probe_success{job="shangwutong-readiness"} == 0
        for: 1m
        labels:
          severity: critical
        annotations:
          summary: Shangwutong readiness failed
          description: The production Connector readiness endpoint is failing.