name: Regression

# 每次 push / PR 自动跑回归。
# 目标：让质量不再依赖「人工记得跑」—— 这是 ROADMAP S1-P3 的核心价值。
#
# 说明：
#  - playwright 是 devDependency（CI 专用工具），运行时依然零依赖。
#  - dev-server 在 Ubuntu 上可正常跑（Node 脚本，跨平台）。
#  - 失败时仍上传报告，便于排查。

on:
  push:
    branches: [main]
  pull_request:
    branches: [main]
  workflow_dispatch:

jobs:
  regression:
    runs-on: ubuntu-latest
    timeout-minutes: 15

    steps:
      - name: Checkout
        uses: actions/checkout@v4

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

      - name: Cache playwright browsers
        uses: actions/cache@v4
        with:
          path: ~/.cache/ms-playwright
          key: ${{ runner.os }}-playwright-${{ hashFiles('package.json') }}
          restore-keys: |
            ${{ runner.os }}-playwright-

      - name: Install dependencies
        run: npm ci || npm install

      - name: Install playwright chromium
        run: npx playwright install --with-deps chromium

      - name: Verify zero runtime dependencies
        run: |
          node -e "
          const p = require('./package.json');
          const deps = Object.keys(p.dependencies || {});
          if (deps.length) {
            console.error('FAIL: 运行时依赖必须为空，实际: ' + deps.join(', '));
            process.exit(1);
          }
          console.log('zero-dep OK');
          "

      - name: Start dev server
        run: |
          node site/dev-server.js &
          # 等服务就绪（最多 15 秒）
          for i in $(seq 1 30); do
            if curl -sf http://127.0.0.1:3311/site/data.json > /dev/null; then
              echo "server ready after ${i} attempt(s)"
              exit 0
            fi
            sleep 0.5
          done
          echo "FAIL: dev-server 未在 15 秒内就绪"
          exit 1

      - name: Run regression
        run: node tools/run-regression.mjs

      - name: Upload report
        uses: actions/upload-artifact@v4
        if: always()
        with:
          name: regression-report
          path: |
            tests/report.json
            tests/report-junit.xml
          retention-days: 30

      - name: Publish test summary
        if: always()
        run: |
          if [ -f tests/report.json ]; then
            node -e "
            const r = require('./tests/report.json');
            const a = r.assertions;
            console.log('## 回归结果');
            console.log('');
            console.log('| 项 | 值 |');
            console.log('|---|---|');
            console.log('| 通过率 | ' + r.passRate + '% |');
            console.log('| 断言 | ' + a.pass + '/' + (a.pass + a.fail) + ' |');
            console.log('| N/A | ' + (a.na || 0) + ' |');
            console.log('| 页面全通过 | ' + r.pagesAllPass + '/' + r.pages + ' |');
            console.log('| 超时 | ' + ((r.timedOut || []).length) + ' |');
            " >> \$GITHUB_STEP_SUMMARY
          fi