apiVersion: apps/v1
kind: Deployment
metadata:
  name: pg-demo
  namespace: cnpg
spec:
  replicas: 1
  selector:
    matchLabels:
      app: pg-demo
  template:
    metadata:
      labels:
        app: pg-demo
    spec:
      containers:
        - name: pg-demo
          image: postgres:17
          env:
            - name: PGHOST
              value: shared-postgres-rw
            - name: PGPORT
              value: "5432"
            - name: PGUSER
              value: app
            - name: PGDATABASE
              value: app
            - name: PGPASSWORD
              valueFrom:
                secretKeyRef:
                  name: shared-postgres-superuser
                  key: password
          command:
            - /bin/bash
            - -c
            - |
              echo "=== CNPG Demo App ==="
              echo "Connecting to $PGHOST:$PGPORT/$PGDATABASE as $PGUSER..."

              until pg_isready -h "$PGHOST" -p "$PGPORT" -U app -q; do
                echo "Waiting for PostgreSQL..."
                sleep 2
              done

              echo "Connected! Creating test table..."
              psql -c "
                CREATE TABLE IF NOT EXISTS visits (
                  id SERIAL PRIMARY KEY,
                  visited_at TIMESTAMP DEFAULT NOW(),
                  source TEXT DEFAULT 'pg-demo'
                );
              "

              echo "Inserting visit..."
              psql -c "INSERT INTO visits (source) VALUES ('pg-demo');"

              echo ""
              echo "Recent visits:"
              psql -c "SELECT * FROM visits ORDER BY id DESC LIMIT 5;"

              echo ""
              echo "=== Keeping alive. Press Ctrl+C to stop. ==="
              echo "Connection is working! Check with: kubectl logs -f deployment/pg-demo -n cnpg"
              sleep infinity