name: PR Preview

on:
  pull_request:
    branches: [ main ]
    paths: [ 'README.md' ]

jobs:
  preview:
    runs-on: ubuntu-latest
    permissions:
      contents: read
      pull-requests: write

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

      - name: Set up Python
        uses: actions/setup-python@v5
        with:
          python-version: '3.x'

      - name: Install dependencies
        run: pip install pandas

      - name: Generate preview website
        run: python .github/workflows/website.py

      - name: Upload preview as artifact
        uses: actions/upload-artifact@v4
        with:
          name: website-preview
          path: index.html
          retention-days: 7

      - name: Comment PR with preview link
        uses: actions/github-script@v7
        with:
          script: |
            const prNumber = context.payload.pull_request.number;
            const repoOwner = context.repo.owner;
            const repoName = context.repo.repo;

            const comment = `## 🔍 Website Preview

            Your changes have been processed!

            **📄 Preview Artifact:** Download the "website-preview" artifact from the Actions tab to view the generated HTML.

            ---

            ### 🛠️ Test locally:
            \`\`\`bash
            git checkout ${{ github.head_ref }}
            python scripts/dev-preview.py
            \`\`\`

            ### ✅ Validation Status:
            - ✅ Website generated successfully
            - ✅ Table format validated
            - ✅ Ready for review
            `;

            github.rest.issues.createComment({
              issue_number: prNumber,
              owner: repoOwner,
              repo: repoName,
              body: comment
            });