name: Frontend Tests

on:
  push:
    branches: [master, main]
  pull_request:
    branches: [master, main]

jobs:
  test:
    runs-on: ubuntu-latest

    steps:
      - name: Checkout repository
        uses: actions/checkout@v4

      - name: Setup Node.js 22
        uses: actions/setup-node@v4
        with:
          node-version: '22'

      # The metadata generator scans wokwi-elements/src/, which only ships in
      # the upstream repo (not on npm). Clone it once for the freshness check.
      - name: Clone wokwi-elements (for metadata regeneration only)
        run: git clone --depth=1 https://github.com/wokwi/wokwi-elements.git third-party/wokwi-elements

      - name: Cache frontend node_modules
        uses: actions/cache@v4
        with:
          path: frontend/node_modules
          key: frontend-${{ hashFiles('frontend/package-lock.json') }}

      - name: Install frontend dependencies
        run: cd frontend && npm install

      - name: Install root dev dependencies
        run: npm install

      # Regenerate metadata and fail if committed JSON is stale. Catches PRs
      # that modify component-overrides.json without running generate:metadata.
      - name: Regenerate component metadata
        run: cd frontend && npm run generate:metadata

      - name: Fail if components-metadata.json is out of date
        run: |
          if ! git diff --quiet frontend/public/components-metadata.json; then
            echo "::error::components-metadata.json is stale. Run 'cd frontend && npm run generate:metadata' and commit the result."
            git diff frontend/public/components-metadata.json | head -100
            exit 1
          fi

      - name: Run tests
        run: cd frontend && npm test