name: Deploy Backend to Production

# Manual production deploy — pulls pre-built backend image from the registry
on:
  workflow_dispatch:
    inputs:
      image_tag:
        description: "Docker image tag to deploy (commit SHA or version tag, e.g. v1.0.0)"
        required: true
        type: string

env:
  BACKEND_IMAGE: git.koppkb.com/kopkb/qms-be
  DEPLOY_DIR: /home/arrahn/Project/qms

jobs:
  deploy:
    runs-on: host

    steps:
      - name: Checkout repository
        uses: actions/checkout@v4
        with:
          ref: ${{ inputs.image_tag }}

      - name: Login to Docker registry
        run: |
          echo "${{ secrets.REGISTRY_PASSWORD }}" | \
            docker login git.koppkb.com \
              -u "${{ secrets.REGISTRY_USERNAME }}" \
              --password-stdin

      - name: Verify backend image exists in registry
        run: |
          set -e
          IMAGE_TAG="${{ inputs.image_tag }}"
          IMAGE="${BACKEND_IMAGE}:${IMAGE_TAG}"

          echo "Checking if image exists: ${IMAGE}"
          if ! docker manifest inspect "${IMAGE}" > /dev/null 2>&1; then
            echo "ERROR: Image ${IMAGE} does not exist in registry!"
            exit 1
          fi
          echo "✓ ${IMAGE} found"

      - name: Pull backend image
        run: |
          set -e
          IMAGE_TAG="${{ inputs.image_tag }}"
          docker pull "${BACKEND_IMAGE}:${IMAGE_TAG}"
          echo "✓ Image pulled successfully"

      - name: Sync compose file and deploy
        run: |
          set -e
          IMAGE_TAG="${{ inputs.image_tag }}"

          mkdir -p "${DEPLOY_DIR}"
          cp be/prod-compose.yml "${DEPLOY_DIR}/docker-compose.yml"

          cd "${DEPLOY_DIR}"

          if [ ! -f .env ]; then
            echo "ERROR: ${DEPLOY_DIR}/.env is missing on the server"
            echo "Create it from be/.env.example (or be/.env.production) before deploying."
            exit 1
          fi

          export IMAGE_TAG
          export BACKEND_IMAGE

          docker compose -f docker-compose.yml pull backend
          docker compose -f docker-compose.yml up -d --remove-orphans

          echo "✓ Deployed IMAGE_TAG=${IMAGE_TAG}"

      - name: Verify deployment
        run: |
          set -e
          cd "${DEPLOY_DIR}"

          echo "Waiting for services to start..."
          sleep 15

          for SERVICE in mysql backend; do
            STATUS=$(docker compose -f docker-compose.yml ps --status running --format '{{.Name}}' "$SERVICE" 2>/dev/null || true)
            if [ -z "$STATUS" ]; then
              echo "ERROR: ${SERVICE} is not running"
              docker compose -f docker-compose.yml ps
              docker compose -f docker-compose.yml logs --tail=50 "$SERVICE" || true
              exit 1
            fi
            echo "✓ ${SERVICE} is running (${STATUS})"
          done

          BACKEND_HOST_PORT=$(grep -E '^BACKEND_HOST_PORT=' .env 2>/dev/null | cut -d= -f2- | tr -d '"' || true)
          BACKEND_HOST_PORT=${BACKEND_HOST_PORT:-8080}

          # No actuator yet — treat any HTTP response as "server is up"
          for i in 1 2 3 4 5 6 7 8; do
            CODE=$(curl -s -o /dev/null -w "%{http_code}" "http://127.0.0.1:${BACKEND_HOST_PORT}/" || echo "000")
            if [ "${CODE}" != "000" ]; then
              echo "✓ Backend is responding on port ${BACKEND_HOST_PORT} (HTTP ${CODE})"
              exit 0
            fi
            echo "Waiting for backend... attempt ${i}/8"
            sleep 5
          done

          echo "ERROR: Backend is not responding on port ${BACKEND_HOST_PORT}"
          docker compose -f docker-compose.yml logs --tail=50 backend || true
          exit 1