name: Deploy PR preview 🔍

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

jobs:
  deploy-preview:
    if: github.event.action != 'closed'
    permissions:
      contents: write
      pull-requests: write
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v7.0.1

      - name: Use Node.js
        uses: actions/setup-node@v7.0.0
        with:
          node-version: 24.x
          cache: 'npm'

      - name: Install and Build 🔧
        run: |
          npm ci
          PR_NUMBER=${{ github.event.number }}
          mkdir -p deploy/pr-preview/pr-${PR_NUMBER}
          touch deploy/.nojekyll
          node src/cli.js -i schemata -o deploy/pr-preview/pr-${PR_NUMBER}/index.html
          ls -lh deploy/pr-preview/pr-${PR_NUMBER}/

      - name: Deploy preview 🚀
        uses: JamesIves/github-pages-deploy-action@v4
        with:
          folder: deploy
          branch: gh-pages
          clean: false

      - name: Comment PR with preview URL 💬
        uses: actions/github-script@v9
        with:
          script: |
            const repoOwner = context.repo.owner;
            const repoName = context.repo.repo;
            const prNumber = context.issue.number;
            const previewUrl = `https://${repoOwner}.github.io/${repoName}/pr-preview/pr-${prNumber}/`;
            const body = [
              '## Avrodoc Preview 🔍',
              '',
              'A live preview of the generated documentation is available at:',
              `👉 ${previewUrl}`,
              '',
              '_This preview is built from the `schemata/` directory and updates on every push to this PR._',
            ].join('\n');

            const comments = await github.rest.issues.listComments({
              owner: context.repo.owner,
              repo: context.repo.repo,
              issue_number: prNumber,
            });
            const existing = comments.data.find(c => c.body.includes('Avrodoc Preview 🔍'));

            if (existing) {
              await github.rest.issues.updateComment({
                owner: context.repo.owner,
                repo: context.repo.repo,
                comment_id: existing.id,
                body,
              });
            } else {
              await github.rest.issues.createComment({
                owner: context.repo.owner,
                repo: context.repo.repo,
                issue_number: prNumber,
                body,
              });
            }

  cleanup-preview:
    if: github.event.action == 'closed'
    permissions:
      contents: write
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v7.0.1
        with:
          ref: gh-pages

      - name: Remove PR preview 🗑️
        run: |
          git config user.name "github-actions[bot]"
          git config user.email "github-actions[bot]@users.noreply.github.com"
          if [ -d "pr-preview/pr-${{ github.event.number }}" ]; then
            git rm -rf "pr-preview/pr-${{ github.event.number }}"
            git commit -m "chore: remove PR preview for #${{ github.event.number }}"
            git push
          else
            echo "No preview folder found, nothing to clean up."
          fi