apiVersion: apps/v1
kind: Deployment
metadata:
  name: todo-app
  namespace: todo-app
  labels:
    app: todo-app
    tier: frontend
spec:
  replicas: 2
  selector:
    matchLabels:
      app: todo-app
  strategy:
    type: RollingUpdate
    rollingUpdate:
      maxSurge: 1
      maxUnavailable: 0
  template:
    metadata:
      labels:
        app: todo-app
        tier: frontend
    spec:
      containers:
        - name: todo-app
          image: todo-app:latest
          # Use local image built into minikube — never pull from registry
          imagePullPolicy: Never
          ports:
            - containerPort: 5000
              name: http
          env:
            - name: DB_HOST
              value: "postgres-service.todo-app.svc.cluster.local"
            - name: DB_NAME
              value: "tododb"
            - name: DB_USER
              valueFrom:
                secretKeyRef:
                  name: postgres-secret
                  key: POSTGRES_USER
            - name: DB_PASS
              valueFrom:
                secretKeyRef:
                  name: postgres-secret
                  key: POSTGRES_PASSWORD
          resources:
            requests:
              cpu: "100m"
              memory: "128Mi"
            limits:
              cpu: "500m"
              memory: "256Mi"
          livenessProbe:
            httpGet:
              path: /health
              port: 5000
            initialDelaySeconds: 15
            periodSeconds: 10
            failureThreshold: 3
          readinessProbe:
            httpGet:
              path: /health
              port: 5000
            initialDelaySeconds: 10
            periodSeconds: 5
            failureThreshold: 3
      # Wait for postgres to be available before starting pods
      initContainers:
        - name: wait-for-postgres
          image: busybox:1.36
          command:
            - sh
            - -c
            - |
              echo "Waiting for PostgreSQL..."
              until nc -z postgres-service.todo-app.svc.cluster.local 5432; do
                echo "PostgreSQL not ready, sleeping 2s..."
                sleep 2
              done
              echo "PostgreSQL is ready!"