name: CI Cache Verification

on:
  push:
    paths:
      - '.github/workflows/cache-verify.yml'
  workflow_dispatch:

jobs:
  build-images:
    runs-on: ubuntu-latest
    strategy:
      matrix:
        include:
          - name: backend
            context: ./backend
            dockerfile: ./backend/Dockerfile
            target: build
          - name: webapp
            context: ./webapp
            dockerfile: ./webapp/Dockerfile
            target: build
          - name: neo4j
            context: ./neo4j
            dockerfile: ./neo4j/Dockerfile
            target: community
    steps:
      - uses: actions/checkout@v4
      - uses: docker/setup-buildx-action@v3
      - name: Build ${{ matrix.name }} image
        uses: docker/build-push-action@v5
        with:
          context: ${{ matrix.context }}
          file: ${{ matrix.dockerfile }}
          target: ${{ matrix.target }}
          push: false
          outputs: type=docker,dest=/tmp/${{ matrix.name }}.tar
      - name: Upload ${{ matrix.name }} image
        uses: actions/upload-artifact@v4
        with:
          name: ${{ matrix.name }}-image
          path: /tmp/${{ matrix.name }}.tar

  verify-cache:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - uses: actions/setup-node@v4
        with:
          node-version: '20'
      - id: cache-key
        env:
          LOCK_HASH: ${{ hashFiles('backend/yarn.lock', 'webapp/yarn.lock') }}
        run: echo "key=node-modules-${{ runner.os }}-${{ env.LOCK_HASH }}" >> $GITHUB_OUTPUT
      - name: Show lockfile hashes (debug)
        run: |
          echo "backend/yarn.lock hash: ${{ hashFiles('backend/yarn.lock') }}"
          echo "webapp/yarn.lock hash: ${{ hashFiles('webapp/yarn.lock') }}"
      - name: Restore node_modules cache
        id: restore-cache
        uses: actions/cache@v4
        with:
          path: |
            backend/node_modules
            webapp/node_modules
          key: ${{ steps.cache-key.outputs.key }}
          restore-keys: |
            node-modules-${{ runner.os }}-
            node-modules-
      - name: Show cache hit status
        run: |
          if [[ "${{ steps.restore-cache.outputs.cache-hit }}" == "true" ]]; then
            echo "✅ Cache was hit!"
          else
            echo "❌ Cache was missed."
          fi

  verify-summary:
    runs-on: ubuntu-latest
    needs: [verify-cache, verify-backend, verify-webapp]
    if: always()
    steps:
      - name: CI Summary
        run: |
          echo "### ✅ CI Cache Verification Summary" >> $GITHUB_STEP_SUMMARY
          echo "- Cache: ${{ needs.verify-cache.result }}" >> $GITHUB_STEP_SUMMARY
          echo "- Backend: ${{ needs.verify-backend.result }}" >> $GITHUB_STEP_SUMMARY
          echo "- Webapp: ${{ needs.verify-webapp.result }}" >> $GITHUB_STEP_SUMMARY
          if [[ '${{ needs.verify-cache.result }}' != 'success' || '${{ needs.verify-backend.result }}' != 'success' || '${{ needs.verify-webapp.result }}' != 'success' ]]; then
            echo "
          ❌ One or more checks failed." >> $GITHUB_STEP_SUMMARY
                      exit 1
                    else
                      echo "
          ✅ All checks passed successfully!" >> $GITHUB_STEP_SUMMARY
                    fi