#!/usr/bin/env node

/**
 * 可访问性自动化审计脚本
 *
 * 使用 @axe-core/playwright 对关键页面进行 WCAG 2.1 AA 规则扫描。
 * 脚本会自动启动 preview 服务，扫描完成后关闭服务并输出报告。
 */

const { chromium } = require('playwright');
const { AxeBuilder } = require('@axe-core/playwright');
const { spawn } = require('child_process');
const path = require('path');

const BASE_URL = process.env.E2E_BASE_URL || 'http://localhost:3000';
const PAGES = [
  { path: '/', name: '首页' },
  { path: '/about', name: '关于我们' },
  { path: '/products', name: '产品中心' },
  { path: '/products/erp', name: '产品详情-ERP' },
  { path: '/solutions', name: '解决方案' },
  { path: '/solutions/manufacturing', name: '解决方案详情-制造' },
  { path: '/services', name: '服务列表' },
  { path: '/services/software', name: '服务详情-软件开发' },
  { path: '/news', name: '新闻列表' },
  { path: '/contact', name: '联系我们' },
];

function startServer() {
  return new Promise((resolve, reject) => {
    const server = spawn('npm', ['run', 'preview'], {
      cwd: path.resolve(__dirname, '..'),
      stdio: 'pipe',
      shell: true,
    });

    server.stdout.on('data', (data) => {
      const output = data.toString();
      if (output.includes('Ready') || output.includes('3000')) {
        resolve(server);
      }
    });

    server.stderr.on('data', (data) => {
      const output = data.toString();
      if (output.includes('EADDRINUSE') || output.includes('Failed')) {
        reject(new Error(output));
      }
    });

    setTimeout(() => resolve(server), 5000);
  });
}

async function waitForServer(url, retries = 30) {
  for (let i = 0; i < retries; i++) {
    try {
      const res = await fetch(url, { method: 'HEAD' });
      if (res.ok || res.status === 404) return;
    } catch {
      await new Promise((r) => setTimeout(r, 1000));
    }
  }
  throw new Error(`Server at ${url} did not become ready in time`);
}

async function runAudit() {
  let server;
  try {
    console.log('🚀 启动预览服务...');
    server = await startServer();
    await waitForServer(BASE_URL);

    console.log('🔍 启动浏览器并运行可访问性审计...\n');
    const browser = await chromium.launch();
    const context = await browser.newContext({ viewport: { width: 1280, height: 800 } });
    const page = await context.newPage();

    const results = [];
    let totalViolations = 0;

    for (const { path: pagePath, name } of PAGES) {
      const url = `${BASE_URL}${pagePath}`;
      try {
        await page.goto(url, { waitUntil: 'domcontentloaded', timeout: 30000 });
        await page.waitForTimeout(1500);

        const analysis = await new AxeBuilder({ page })
          .withTags(['wcag2a', 'wcag2aa', 'wcag21aa'])
          .analyze();

        const violations = analysis.violations;
        totalViolations += violations.length;

        results.push({
          name,
          url,
          passed: violations.length === 0,
          violations: violations.map((v) => ({
            rule: v.id,
            impact: v.impact,
            description: v.description,
            help: v.help,
            helpUrl: v.helpUrl,
            nodes: v.nodes.length,
            targets: v.nodes.map((n) => ({
              target: n.target,
              html: n.html?.slice(0, 200),
            })),
          })),
        });

        const status = violations.length === 0 ? '✅' : '❌';
        console.log(`${status} ${name} (${violations.length} 个问题)`);
        for (const v of violations) {
          console.log(`   • [${v.impact?.toUpperCase() ?? 'UNKNOWN'}] ${v.id}: ${v.help} (${v.nodes.length} 个节点)`);
          for (const node of v.nodes.slice(0, 3)) {
            const target = Array.isArray(node.target) ? node.target.join(' > ') : String(node.target);
            console.log(`      - ${target}`);
          }
        }
      } catch (error) {
        console.error(`❌ ${name} 审计失败:`, error.message);
        results.push({ name, url, passed: false, error: error.message, violations: [] });
      }
    }

    await browser.close();

    console.log('\n📊 审计摘要');
    console.log(`   扫描页面: ${results.length}`);
    console.log(`   通过页面: ${results.filter((r) => r.passed).length}`);
    console.log(`   失败页面: ${results.filter((r) => !r.passed).length}`);
    console.log(`   问题总数: ${totalViolations}`);

    const reportPath = path.resolve(__dirname, '../accessibility-report.json');
    require('fs').writeFileSync(reportPath, JSON.stringify(results, null, 2));
    console.log(`\n📝 详细报告已保存: ${reportPath}`);

    process.exit(totalViolations > 0 ? 1 : 0);
  } catch (error) {
    console.error('审计执行失败:', error);
    process.exit(1);
  } finally {
    if (server) {
      server.kill('SIGTERM');
    }
  }
}

runAudit();