name: PR Preview

on:
  pull_request_target:
    types: [opened, synchronize, reopened]
    branches: [main, develop]
  workflow_dispatch:
    inputs:
      pr_number:
        description: 'Pull Request number to deploy preview for'
        required: true
      pr_branch:
        description: 'The branch name to deploy'
        required: true

jobs:
  build:
    runs-on: ubuntu-latest

    permissions:
      contents: write
      deployments: write
      pull-requests: write

    steps:
      # First, check out the workflow file (from the base) so secrets are available.
      - name: Checkout base branch
        uses: actions/checkout@v4

      # Determine PR info based on the event type.
      - name: Set PR info
        id: pr-info
        run: |
          if [ "${{ github.event_name }}" == "workflow_dispatch" ]; then
            echo "PR_NUMBER=${{ github.event.inputs.pr_number }}" >> $GITHUB_ENV
            echo "PR_BRANCH=${{ github.event.inputs.pr_branch }}" >> $GITHUB_ENV
          else
            echo "PR_NUMBER=${{ github.event.pull_request.number }}" >> $GITHUB_ENV
            echo "PR_BRANCH=${{ github.event.pull_request.head.ref }}" >> $GITHUB_ENV
          fi

      # Now check out the PR’s head branch (whether from a PR event or supplied manually)
      - name: Checkout PR branch
        uses: actions/checkout@v4
        with:
          ref: ${{ env.PR_BRANCH }}

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

      - name: Build
        run: |
          yarn install --production --frozen-lockfile
          yarn build-preview
          rm -rf dist/web.tgz

      - name: Deploy to Cloudflare Pages
        uses: cloudflare/wrangler-action@v3
        with:
          apiToken: ${{ secrets.CLOUDFLARE_API_TOKEN }}
          accountId: ${{ secrets.CLOUDFLARE_ACCOUNT_ID }}
          gitHubToken: ${{ secrets.GITHUB_TOKEN }}
          command: pages deploy dist --project-name=data-preview --branch=pr-${{ env.PR_NUMBER }}

      - name: Pull request comment
        uses: actions/github-script@v6
        with:
          script: |
            const prNumber = "${{ env.PR_NUMBER }}";
            const now = new Date().toISOString().substring(0, 19).replace('T', ' ');
            const reviewBody = `🐱 感谢贡献！\n\n部署了预览，在这里哦: https://pr-${prNumber}.data-preview.pages.dev\n\n🕒 最后更新: ${now} (UTC)`;
            
            // List existing reviews on the PR.
            const { data: reviews } = await github.rest.pulls.listReviews({
              owner: context.repo.owner,
              repo: context.repo.repo,
              pull_number: prNumber,
            });
            const existingReview = reviews.find(review => review.body && review.body.includes('部署了预览'));
            if (existingReview) {
              // Update the existing review.
              await github.rest.pulls.updateReview({
                owner: context.repo.owner,
                repo: context.repo.repo,
                pull_number: prNumber,
                review_id: existingReview.id,
                body: reviewBody,
              });
            } else {
              // Create a new review comment.
              await github.rest.pulls.createReview({
                owner: context.repo.owner,
                repo: context.repo.repo,
                pull_number: prNumber,
                body: reviewBody,
                event: "COMMENT",
              });
            }