name: Docs Preview

on:
  pull_request:
    paths:
      - 'docs/**'

concurrency:
  group: docs-preview-${{ github.event.pull_request.number }}
  cancel-in-progress: true

permissions:
  contents: read
  pull-requests: write

jobs:
  preview:
    runs-on: ubuntu-latest
    # Skip fork PRs
    if: github.event.pull_request.head.repo.full_name == github.repository
    steps:
      - name: Checkout
        uses: actions/checkout@v7
        with:
          persist-credentials: false

      - name: Set up Node.js
        uses: actions/setup-node@v7
        with:
          node-version: 26.x
          cache: yarn
          cache-dependency-path: docs/yarn.lock

      - name: Install dependencies
        working-directory: docs
        run: yarn install --frozen-lockfile

      - name: Build Docusaurus
        working-directory: docs
        run: yarn build

      - name: Deploy preview to Cloudflare Pages
        uses: cloudflare/wrangler-action@v4
        with:
          apiToken: ${{ secrets.CLOUDFLARE_PAGES_TOKEN }}
          accountId: ${{ secrets.CLOUDFLARE_ACCOUNT_ID }}
          workingDirectory: docs
          command: pages deploy build --project-name=cleanuparr-docs --branch=pull-${{ github.event.pull_request.number }}

      - name: Comment preview URL
        uses: actions/github-script@v9
        with:
          script: |
            const url = `https://pull-${context.issue.number}.cleanuparr-docs.pages.dev`;
            const marker = '<!-- docs-preview -->';
            const body = [
              marker,
              `Docs preview for \`${context.payload.pull_request.head.ref}\` (\`${context.payload.pull_request.head.sha.substring(0, 7)}\`):`,
              ``,
              `${url}/docs`
            ].join('\n');

            const comments = await github.paginate(github.rest.issues.listComments, {
              owner: context.repo.owner,
              repo: context.repo.repo,
              issue_number: context.issue.number,
              per_page: 100
            });
            const existing = comments.find(c => c.body.includes(marker));

            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: context.issue.number,
                body
              });
            }