---
# AlertManager ConfigMap with routing rules
apiVersion: v1
kind: ConfigMap
metadata:
  name: alertmanager-config
  namespace: gravl-staging
  labels:
    app: gravl
    component: alerting
data:
  alertmanager.yml: |
    global:
      resolve_timeout: 5m
    
    route:
      receiver: 'default'
      group_by: ['alertname', 'cluster', 'service']
      group_wait: 10s
      group_interval: 10s
      repeat_interval: 12h
      
      routes:
        - match:
            severity: critical
          receiver: 'slack-critical'
          group_wait: 0s
          repeat_interval: 1h
        
        - match:
            severity: warning
          receiver: 'slack-warnings'
          group_wait: 5s
          repeat_interval: 4h
        
        - match:
            severity: info
          receiver: 'email-ops'
          group_wait: 30s
          repeat_interval: 24h
    
    receivers:
      - name: 'default'
        webhook_configs:
          - url: 'http://localhost:5001/'
      
      - name: 'slack-critical'
        slack_configs:
          - channel: '#gravl-critical'
            title: '🚨 CRITICAL: {{ .GroupLabels.alertname }}'
            text: '{{ range .Alerts }}{{ .Annotations.description }}{{ end }}'
            color: 'danger'
            send_resolved: true
            api_url: 'https://hooks.slack.com/services/EXAMPLE/WEBHOOK/URL'
      
      - name: 'slack-warnings'
        slack_configs:
          - channel: '#gravl-warnings'
            title: '⚠️ Warning: {{ .GroupLabels.alertname }}'
            text: '{{ range .Alerts }}{{ .Annotations.description }}{{ end }}'
            color: 'warning'
            send_resolved: true
            api_url: 'https://hooks.slack.com/services/EXAMPLE/WEBHOOK/URL'
      
      - name: 'email-ops'
        email_configs:
          - to: 'ops@gravl.io'
            from: 'alertmanager@gravl.io'
            smarthost: 'smtp.example.com:587'
            auth_username: 'user@example.com'
            auth_password: 'password'

---
# AlertManager Deployment
apiVersion: apps/v1
kind: Deployment
metadata:
  name: alertmanager
  namespace: gravl-staging
  labels:
    app: gravl
    component: alerting
spec:
  replicas: 1
  selector:
    matchLabels:
      app: gravl
      component: alerting
  
  template:
    metadata:
      labels:
        app: gravl
        component: alerting
    spec:
      serviceAccountName: alertmanager
      
      containers:
      - name: alertmanager
        image: prom/alertmanager:latest
        imagePullPolicy: IfNotPresent
        
        args:
          - '--config.file=/etc/alertmanager/alertmanager.yml'
          - '--storage.path=/alertmanager'
          - '--log.level=info'
        
        ports:
        - name: http
          containerPort: 9093
          protocol: TCP
        
        volumeMounts:
        - name: config
          mountPath: /etc/alertmanager
        - name: storage
          mountPath: /alertmanager
        
        livenessProbe:
          httpGet:
            path: /-/healthy
            port: 9093
          initialDelaySeconds: 30
          periodSeconds: 10
        
        readinessProbe:
          httpGet:
            path: /-/ready
            port: 9093
          initialDelaySeconds: 10
          periodSeconds: 5
        
        resources:
          requests:
            cpu: 100m
            memory: 128Mi
          limits:
            cpu: 200m
            memory: 256Mi
      
      volumes:
      - name: config
        configMap:
          name: alertmanager-config
      - name: storage
        emptyDir: {}

---
# AlertManager Service
apiVersion: v1
kind: Service
metadata:
  name: alertmanager
  namespace: gravl-staging
  labels:
    app: gravl
    component: alerting
spec:
  type: ClusterIP
  selector:
    app: gravl
    component: alerting
  ports:
  - name: http
    port: 9093
    targetPort: http
    protocol: TCP

---
# Service Account for AlertManager
apiVersion: v1
kind: ServiceAccount
metadata:
  name: alertmanager
  namespace: gravl-staging
  labels:
    app: gravl
    component: alerting