name: Deploy Preview (PR)

on:
  pull_request:
    types: [opened, reopened, synchronize, closed]

permissions:
  contents: read
  pull-requests: write

jobs:
  test:
    name: Run Python Tests
    if: github.event.action != 'closed'
    runs-on: ubuntu-latest

    steps:
      - name: Check out repository code
        uses: actions/checkout@v4

      - name: Set up Python 3.11
        uses: actions/setup-python@v5
        with:
          python-version: '3.11'

      - name: Install dependencies
        run: |
          python -m pip install --upgrade pip
          pip install -r requirements.txt

      - name: Run tests with pytest
        run: pytest
        working-directory: ./7project/backend

  build:
    if: github.event.action != 'closed'
    name: Build and push image (reusable)
    uses: ./.github/workflows/build-image.yaml
    with:
      mode: pr
      image_repo: lukastrkan/cc-app-demo
      context: 7project/backend
      pr_number: ${{ github.event.pull_request.number }}
    secrets: inherit

  get_urls:
    if: github.event.action != 'closed'
    name: Generate Preview URLs
    uses: ./.github/workflows/url_generator.yml
    with:
      runner: vhs
      mode: pr
      pr_number: ${{ github.event.pull_request.number }}
      base_domain: ${{ vars.DEV_BASE_DOMAIN }}
    secrets: inherit

  frontend:
    if: github.event.action != 'closed'
    name: Frontend - Build and Deploy to Cloudflare Pages (PR)
    needs: [get_urls]
    uses: ./.github/workflows/frontend-pages.yml
    with:
      mode: pr
      pr_number: ${{ github.event.pull_request.number }}
      backend_url_scheme: ${{ needs.get_urls.outputs.backend_url_scheme }}
    secrets: inherit

  deploy:
    if: github.event.action != 'closed'
    name: Helm upgrade/install (PR preview)
    runs-on: vhs
    concurrency:
      group: pr-${{ github.event.pull_request.number }}
      cancel-in-progress: false
    needs: [build, frontend, get_urls]
    steps:
      - name: Checkout
        uses: actions/checkout@v4

      - name: Setup Helm
        uses: azure/setup-helm@v4

      - name: Setup kubectl
        uses: azure/setup-kubectl@v4

      - name: Configure kubeconfig
        env:
          KUBE_CONFIG: ${{ secrets.KUBE_CONFIG }}
        run: |
          mkdir -p ~/.kube
          if [ -z "$KUBE_CONFIG" ]; then
            echo "Secret KUBE_CONFIG is required (kubeconfig content)"; exit 1; fi
          echo "$KUBE_CONFIG" > ~/.kube/config
          chmod 600 ~/.kube/config

      - name: Helm upgrade/install PR preview
        env:
          DEV_BASE_DOMAIN: ${{ secrets.BASE_DOMAIN }}
          RABBITMQ_PASSWORD: ${{ secrets.PROD_RABBITMQ_PASSWORD }}
          DB_PASSWORD: ${{ secrets.PROD_DB_PASSWORD }}
          DIGEST: ${{ needs.build.outputs.digest }}
          DOMAIN: "${{ needs.get_urls.outputs.backend_url }}"
          DOMAIN_SCHEME: "${{ needs.get_urls.outputs.backend_url_scheme }}"
          FRONTEND_DOMAIN: "${{ needs.get_urls.outputs.frontend_url }}"
          FRONTEND_DOMAIN_SCHEME: "${{ needs.get_urls.outputs.frontend_url_scheme }}"
        run: |
          PR=${{ github.event.pull_request.number }}
          RELEASE=myapp-pr-$PR
          NAMESPACE=pr-$PR
          helm upgrade --install "$RELEASE" ./7project/charts/myapp-chart \
            -n "$NAMESPACE" --create-namespace \
            -f 7project/charts/myapp-chart/values-dev.yaml \
            --set prNumber="$PR" \
            --set deployment="pr-$PR" \
            --set domain="$DOMAIN" \
            --set domain_scheme="$DOMAIN_SCHEME" \
            --set frontend_domain="$FRONTEND_DOMAIN" \
            --set frontend_domain_scheme="$FRONTEND_DOMAIN_SCHEME" \
            --set image.digest="$DIGEST" \
            --set-string rabbitmq.password="$RABBITMQ_PASSWORD" \
            --set-string database.password="$DB_PASSWORD"

      - name: Post preview URLs as PR comment
        uses: actions/github-script@v7
        env:
          BACKEND_URL: ${{ needs.get_urls.outputs.backend_url_scheme }}
          FRONTEND_URL: ${{ needs.get_urls.outputs.frontend_url_scheme }}
        with:
          script: |
            const pr = context.payload.pull_request;
            if (!pr) { core.setFailed('No pull_request context'); return; }
            const prNumber = pr.number;
            const backendUrl = process.env.BACKEND_URL || '(not available)';
            const frontendUrl = process.env.FRONTEND_URL || '(not available)';
            const marker = '<!-- preview-comment-marker -->';
            const body = `${marker}\nPreview environment is running\n- Frontend: ${frontendUrl}\n- Backend: ${backendUrl}\n`;
            const { owner, repo } = context.repo;
            const { data: comments } = await github.rest.issues.listComments({ owner, repo, issue_number: prNumber, per_page: 100 });
            const existing = comments.find(c => c.body && c.body.includes(marker));
            if (existing) {
              await github.rest.issues.updateComment({ owner, repo, comment_id: existing.id, body });
            } else {
              await github.rest.issues.createComment({ owner, repo, issue_number: prNumber, body });
            }

  uninstall:
    if: github.event.action == 'closed'
    name: Helm uninstall (PR preview)
    runs-on: vhs
    steps:
      - name: Setup Helm
        uses: azure/setup-helm@v4

      - name: Setup kubectl
        uses: azure/setup-kubectl@v4

      - name: Configure kubeconfig
        env:
          KUBE_CONFIG: ${{ secrets.KUBE_CONFIG }}
        run: |
          mkdir -p ~/.kube
          if [ -z "$KUBE_CONFIG" ]; then
            echo "Secret KUBE_CONFIG is required (kubeconfig content)"; exit 1; fi
          echo "$KUBE_CONFIG" > ~/.kube/config
          chmod 600 ~/.kube/config

      - name: Helm uninstall release and cleanup namespace
        run: |
          PR=${{ github.event.pull_request.number }}
          RELEASE=myapp-pr-$PR
          NAMESPACE=pr-$PR
          helm uninstall "$RELEASE" -n "$NAMESPACE" || true
          # Optionally delete the namespace if empty
          kubectl delete namespace "$NAMESPACE" --ignore-not-found=true || true