import { test, expect } from '@playwright/test';

/**
 * P3: 多浏览器与多设备兼容性测试
 *
 * 目标：验证网站在不同浏览器和设备上的显示一致性
 *
 * 测试矩阵：
 * - 浏览器：Chrome, Firefox, Safari (WebKit)
 * - 设备：Desktop, Tablet, Mobile (多种尺寸)
 * - 关键页面：首页、关于、联系、产品等
 */

// 设置超时时间
test.setTimeout(60000);

// ==================== 关键页面的跨浏览器一致性测试 ====================
test.describe('跨浏览器 - 核心页面渲染', () => {

  const criticalPages = [
    { path: '/', name: '首页' },
    { path: '/about', name: '关于我们' },
    { path: '/contact', name: '联系我们' },
  ];

  for (const { path, name } of criticalPages) {
    test(`${name} (${path}) - 页面基本元素可见`, async ({ page }) => {
      await page.goto(path, { waitUntil: 'domcontentloaded', timeout: 30000 });
      await page.waitForTimeout(2000);

      // 基本结构检查
      await expect(page.locator('header')).toBeVisible();
      await expect(page.locator('main, [role="main"]').first()).toBeVisible();
      await expect(page.locator('footer, [data-testid="footer"]')).toBeVisible();
    });

    test(`${name} (${path}) - Logo 显示正常`, async ({ page }) => {
      await page.goto(path, { waitUntil: 'domcontentloaded', timeout: 30000 });
      await page.waitForTimeout(1500);

      const logo = page.locator('header img, header svg').first();
      if (await logo.count() > 0) {
        await expect(logo).toBeVisible();

        // 检查 Logo 尺寸合理
        const box = await logo.boundingBox();
        expect(box).not.toBeNull();
        expect(box!.width).toBeGreaterThan(50);
        expect(box!.height).toBeGreaterThan(20);
      }
    });

    test(`${name} (${path}) - 导航菜单可交互`, async ({ page }) => {
      await page.goto(path, { waitUntil: 'domcontentloaded', timeout: 30000 });
      await page.waitForTimeout(1500);

      // 桌面端导航或移动端按钮应该存在
      const desktopNav = page.locator('[data-testid="desktop-navigation"]');
      const mobileMenuBtn = page.locator('[data-testid="mobile-menu-button"]');

      const hasDesktopNav = await desktopNav.count() > 0 && await desktopNav.first().isVisible();
      const hasMobileBtn = await mobileMenuBtn.count() > 0 && await mobileMenuBtn.first().isVisible();

      expect(hasDesktopNav || hasMobileBtn).toBeTruthy();
    });
  }
});

// ==================== 多设备视口适配测试 ====================
test.describe('多设备 - 视口响应式布局', () => {

  const viewports = [
    { name: 'Desktop XL', width: 1920, height: 1080, type: 'desktop' as const },
    { name: 'Desktop', width: 1280, height: 800, type: 'desktop' as const },
    { name: 'Laptop', width: 1024, height: 768, type: 'laptop' as const },
    { name: 'Tablet Landscape', width: 768, height: 1024, type: 'tablet' as const },
    { name: 'Tablet Portrait', width: 768, height: 1024, type: 'tablet' as const },
    { name: 'Mobile Large', width: 428, height: 926, type: 'mobile' as const },
    { name: 'Mobile Medium', width: 375, height: 667, type: 'mobile' as const },
    { name: 'Mobile Small', width: 320, height: 568, type: 'mobile' as const },
  ];

  for (const viewport of viewports) {
    test(`${viewport.name} (${viewport.width}x${viewport.height}) - 首页布局完整`, async ({ page }) => {
      await page.setViewportSize({ width: viewport.width, height: viewport.height });
      await page.goto('/', { waitUntil: 'domcontentloaded', timeout: 30000 });
      await page.waitForTimeout(1500);

      // Header 可见
      await expect(page.locator('header')).toBeVisible();

      // Main content 可见
      const mainContent = page.locator('main, [role="main"], #main-content').first();
      await expect(mainContent).toBeVisible();

      // Footer 可见
      await expect(page.locator('footer, [data-testid="footer"]')).toBeVisible();
    });

    test(`${viewport.name} (${viewport.width}x${viewport.height}) - 无水平滚动条`, async ({ page }) => {
      await page.setViewportSize({ width: viewport.width, height: viewport.height });
      await page.goto('/', { waitUntil: 'domcontentloaded', timeout: 30000 });
      await page.waitForTimeout(1500);

      // 检查是否出现水平滚动条
      const hasHorizontalScroll = await page.evaluate(() => {
        return document.documentElement.scrollWidth > document.documentElement.clientWidth;
      });

      expect(hasHorizontalScroll).toBeFalsy();
    });

    if (viewport.type === 'mobile') {
      test(`${viewport.name} - 移动端导航可用`, async ({ page }) => {
        await page.setViewportSize({ width: viewport.width, height: viewport.height });
        await page.goto('/', { waitUntil: 'domcontentloaded', timeout: 30000 });
        await page.waitForTimeout(1500);

        const mobileMenuBtn = page.locator('[data-testid="mobile-menu-button"]').first();
        if (await mobileMenuBtn.isVisible()) {
          // 按钮应在可视区域内
          const box = await mobileMenuBtn.boundingBox();
          expect(box).not.toBeNull();
          expect(box!.x).toBeGreaterThanOrEqual(0);
          expect(box!.y).toBeGreaterThanOrEqual(0);
          expect(box!.x + box!.width).toBeLessThanOrEqual(viewport.width + 10); // 允许小误差
        }
      });
    }
  }
});

// ==================== 特定浏览器行为测试 ====================
test.describe('特定浏览器 - 行为差异检查', () => {

  test('字体回退机制工作正常', async ({ page }) => {
    await page.goto('/', { waitUntil: 'domcontentloaded', timeout: 30000 });
    await page.waitForTimeout(1500);

    // 检查 body 的 font-family 是否设置
    const fontFamily = await page.evaluate(() => {
      return window.getComputedStyle(document.body).fontFamily;
    });

    expect(fontFamily).toBeTruthy();
    expect(fontFamily.length).toBeGreaterThan(0);
    // 应该包含中文字体或通用字体族
    expect(fontFamily.toLowerCase()).toMatch(/sans-serif|serif|system-ui|pingfang|microsoft|hei/i);
  });

  test('CSS Grid/Flexbox 兼容性', async ({ page }) => {
    await page.goto('/', { waitUntil: 'domcontentloaded', timeout: 30000 });
    await page.waitForTimeout(1500);

    // 检查是否有使用现代布局的容器
    const modernLayoutUsed = await page.evaluate(() => {
      const allElements = document.querySelectorAll('*');
      let usesGrid = false;
      let usesFlex = false;

      for (const el of allElements) {
        const style = window.getComputedStyle(el);
        if (style.display === 'grid') usesGrid = true;
        if (style.display === 'flex') usesFlex = true;

        if (usesGrid && usesFlex) break;
      }

      return { usesGrid, usesFlex };
    });

    // 网站应该使用现代CSS布局
    expect(modernLayoutUsed.usesGrid || modernLayoutUsed.usesFlex).toBeTruthy();
  });

  test('图片懒加载兼容性', async ({ page }) => {
    await page.goto('/', { waitUntil: 'domcontentloaded', timeout: 30000 });
    await page.waitForTimeout(2000);

    // 检查图片是否正确加载
    const images = page.locator('img');
    const imageCount = await images.count();

    let loadedCount = 0;
    let errorCount = 0;

    for (let i = 0; i < Math.min(imageCount, 10); i++) {
      const img = images.nth(i);
      const naturalWidth = await img.evaluate((el: HTMLImageElement) => el.naturalWidth);
      if (naturalWidth > 0) loadedCount++;
    }

    // 至少应该有一些图片加载成功
    if (imageCount > 0) {
      expect(loadedCount).toBeGreaterThan(0);
    }
  });

  test('表单元素样式一致', async ({ page }) => {
    await page.goto('/contact', { waitUntil: 'domcontentloaded', timeout: 30000 });
    await page.waitForTimeout(3000);

    // Check for any visible form inputs (selectors vary by page implementation)
    const inputs = page.locator('input:visible, textarea:visible');
    const inputCount = await inputs.count();

    if (inputCount > 0) {
      for (let i = 0; i < Math.min(inputCount, 5); i++) {
        const input = inputs.nth(i);
        // Verify input is visible and has reasonable dimensions
        const box = await input.boundingBox();
        if (box) {
          expect(box.width).toBeGreaterThan(50);
          expect(box.height).toBeGreaterThan(20);
        }
      }
    }
  });
});

// ==================== 触摸设备模拟测试 ====================
test.describe('触摸设备 - 手势交互', () => {

  test('触摸滑动流畅（无卡顿）', async ({ page, browserName }) => {
    // touchscreen API is only available in Chromium with touch emulation
    test.skip(browserName !== 'chromium', 'Touchscreen API only available in Chromium');

    await page.setViewportSize({ width: 375, height: 667 });
    await page.goto('/', { waitUntil: 'domcontentloaded', timeout: 30000 });
    await page.waitForTimeout(1500);

    // Simulate scroll via mouse wheel instead of touchscreen (cross-browser compatible)
    await page.mouse.wheel(0, 300);
    await page.waitForTimeout(500);

    // 页面不应该崩溃或有错误
    const bodyVisible = await page.locator('body').isVisible();
    expect(bodyVisible).toBeTruthy();
  });

  test('双击缩放不会破坏布局', async ({ page }) => {
    await page.setViewportSize({ width: 375, height: 667 });
    await page.goto('/', { waitUntil: 'domcontentloaded', timeout: 30000 });
    await page.waitForTimeout(1500);

    // 模拟双击
    const header = page.locator('header').first();
    await header.dblclick();
    await page.waitForTimeout(500);

    // Header 应该仍然可见
    await expect(header).toBeVisible();
  });
});