name: Validate metadata.json

on:
  pull_request:
    types: [opened, synchronize, reopened]
    paths:
      - "instructions/**"
      - "prompts/**"
      - "chatmodes/**"
      - "*.js"

jobs:
  validate-metadata:
    permissions:
      pull-requests: write
      contents: read
    runs-on: ubuntu-latest
    steps:
      - name: Checkout code
        uses: actions/checkout@v4
        with:
          fetch-depth: 0

      - name: Setup Node.js
        uses: actions/setup-node@v4
        with:
          node-version: "20"

      - name: Update metadata.json
        run: node update-metadata.js

      - name: Check for metadata.json changes
        id: check-diff
        run: |
          if git diff --exit-code metadata.json; then
            echo "No changes to metadata.json after running update script."
            echo "status=success" >> $GITHUB_OUTPUT
          else
            echo "Changes detected in metadata.json after running update script."
            echo "status=failure" >> $GITHUB_OUTPUT
            echo "diff<<EOF" >> $GITHUB_OUTPUT
            git diff metadata.json >> $GITHUB_OUTPUT
            echo "EOF" >> $GITHUB_OUTPUT
          fi

      - name: Output diff to logs for non-write users
        if: steps.check-diff.outputs.status == 'failure' && github.event.pull_request.head.repo.permissions.push != true
        run: |
          echo "::group::metadata.json diff (changes needed)"
          echo "The following changes need to be made to metadata.json:"
          echo ""
          git diff metadata.json
          echo "::endgroup::"

      - name: Comment on PR if metadata.json needs updating
        if: steps.check-diff.outputs.status == 'failure' && github.event.pull_request.head.repo.permissions.push == true
        uses: marocchino/sticky-pull-request-comment@v2
        with:
          header: metadata-validation
          message: |
            ## ⚠️ `metadata.json` needs to be updated

            The `update-metadata.js` script detected changes that need to be made to the `metadata.json` file.

            Please run `node update-metadata.js` locally and commit the changes before merging this PR.

            <details>
              <summary>View diff</summary>

              ```diff
              ${{ steps.check-diff.outputs.diff }}
              ```
            </details>

      - name: Fail workflow if metadata.json needs updating
        if: steps.check-diff.outputs.status == 'failure'
        run: |
          echo "❌ `metadata.json` needs to be updated. Please run 'node update-metadata.js' locally and commit the changes."
          exit 1