name: PR Preview Deploy

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

jobs:
  build-and-deploy:
    runs-on: ubuntu-latest

    steps:
      # 1. 拉取 PR 分支代码（支持 fork）
      - name: Checkout PR code
        uses: actions/checkout@v4
        with:
          ref: ${{ github.event.pull_request.head.sha }}

      # 2. 安装 pnpm
      - name: Install pnpm
        uses: pnpm/action-setup@v3
        with:
          version: 9

      # 3. 安装依赖
      - name: Install dependencies
        run: pnpm install --frozen-lockfile

      # 4. 构建站点
      - name: Build site
        run: pnpm build  # 构建产物目录确保是 ./dist 或自行修改

      # 5. 安装 Wrangler CLI
      - name: Install Wrangler CLI
        run: pnpm add -g wrangler

      # 6. 部署到 Cloudflare Pages
      - name: Deploy to Cloudflare Pages
        run: |
          BRANCH_NAME=pr-${{ github.event.pull_request.number }}
          wrangler pages deploy ./dist \
            --project-name=${{ secrets.CLOUDFLARE_PROJECT_NAME }} \
            --branch=$BRANCH_NAME \
            --account-id=${{ secrets.CLOUDFLARE_ACCOUNT_ID }} \
            --api-token=${{ secrets.CLOUDFLARE_API_TOKEN }}

      # 7. 在 PR 评论区贴出预览链接
      - name: Comment Preview URL
        uses: actions/github-script@v7
        with:
          script: |
            const prNumber = context.payload.pull_request.number;
            const previewUrl = `https://${{ secrets.CLOUDFLARE_PROJECT_NAME }}--pr-${prNumber}.pages.dev`;
            github.rest.issues.createComment({
              issue_number: prNumber,
              owner: context.repo.owner,
              repo: context.repo.repo,
              body: `✅ 预览已部署: ${previewUrl}`
            });