name: Regression

# 每次 push / PR 自动跑回归。
# 所有检查都在 Node 20 上执行；playwright 仅作为 CI 开发依赖。

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

permissions:
  contents: read

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

    steps:
      - name: Checkout
        uses: actions/checkout@v4
        with:
          persist-credentials: false

      - 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', 'package-lock.json') }}
          restore-keys: |
            ${{ runner.os }}-playwright-

      - name: Install dependencies
        run: npm ci

      - name: Install playwright chromium
        run: npx --no-install playwright install --with-deps chromium

      # npm run verify:nav 的断言依赖字体度量（7 条链接的文字宽度决定顶栏装不装得下）。
      # 缺 CJK 字体时中文会退化成豆腐块或拉丁回退，宽度随之改变 → 断言假失败。
      - name: Install CJK fonts
        run: sudo apt-get update -qq && sudo apt-get install -y -qq fonts-noto-cjk

      - 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 &
          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: Verify i18n
        run: node tools/verify-i18n.mjs

      - name: Verify site routing
        run: node tools/verify-site-routing.mjs

      - name: Verify cross-platform structure
        run: node tools/verify-cross-platform.mjs

      - name: Verify theme modes
        run: node tools/verify-theme.mjs

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

      - name: Smoke test site
        run: npm run smoke:site

      # 顶栏窄屏折叠（≤1366px 汉堡 + 抽屉）：18 个宽度 × 中英双语 + 抽屉交互，约 35 秒。
      # 必须在浏览器里跑 —— 元素"可见"不等于"点得到"：遮罩层叠、visibility 过渡
      # 都会让点击静默失效，而矩形与可见性断言全都会通过（改动前实测踩中两个）。
      - name: Verify responsive nav
        run: npm run verify:nav

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