import { test, describe } from 'node:test';
import assert from 'node:assert';
import { existsSync, mkdirSync, writeFileSync, rmSync, readFileSync } from 'fs';
import { join } from 'path';
import { fileURLToPath } from 'url';
import { dirname } from 'path';

const __filename = fileURLToPath(import.meta.url);
const __dirname = dirname(__filename);

// 导入要测试的模块
import { smartInject } from '../../lib/framework-inject.js';

describe('框架注入集成测试', () => {
  const testDir = join(__dirname, 'fixtures');

  test.before(() => {
    if (!existsSync(testDir)) {
      mkdirSync(testDir, { recursive: true });
    }
  });

  test.after(() => {
    // 清理所有测试文件
    const filesToClean = [
      'vite.config.js',
      'vite.config.ts',
      'next.config.js',
      'app/layout.tsx',
      'app/layout.js',
      'pages/_document.tsx',
      'pages/_document.js',
      'test.html'
    ];

    filesToClean.forEach(file => {
      const filePath = join(testDir, file);
      if (existsSync(filePath)) {
        rmSync(filePath);
      }
    });

    const dirsToClean = ['app', 'pages'];
    dirsToClean.forEach(dir => {
      const dirPath = join(testDir, dir);
      if (existsSync(dirPath)) {
        rmSync(dirPath, { recursive: true });
      }
    });
  });

  describe('Vite 项目注入', () => {
    test('应该成功注入到 Vite 配置文件', () => {
      // 创建 Vite 配置文件
      const viteConfig = `import { defineConfig } from 'vite'
import react from '@vitejs/plugin-react'

export default defineConfig({
  plugins: [react()],
  server: {
    port: 3000
  }
})`;
      writeFileSync(join(testDir, 'vite.config.js'), viteConfig);

      // 执行注入
      const result = smartInject({
        remote: 'http://localhost:9000/dev-monitor.js',
        dryRun: true,
        verbose: true
      }, testDir);

      assert.strictEqual(result, true);
    });

    test('应该检查已存在的插件', () => {
      // 创建已有插件的 Vite 配置
      const viteConfigWithPlugin = `import { defineConfig } from 'vite'
import react from '@vitejs/plugin-react'

export default defineConfig({
  plugins: [
    react(),
    // dev-inject-plugin
    {
      name: 'dev-inject-plugin',
      transformIndexHtml(html) {
        if (process.env.NODE_ENV === 'development') {
          return html.replace('</head>', '<script src="/existing.js"></script></head>');
        }
        return html;
      }
    }
  ],
  server: {
    port: 3000
  }
})`;
      writeFileSync(join(testDir, 'vite.config.js'), viteConfigWithPlugin);

      // 执行注入（应该检测到已存在）
      const result = smartInject({
        remote: 'http://localhost:9000/dev-monitor.js',
        dryRun: true
      }, testDir);

      assert.strictEqual(result, true);
    });

    test('应该处理没有 plugins 数组的情况', () => {
      // 创建没有 plugins 的配置
      const simpleConfig = `export default {
    server: {
      port: 3000
    }
  }`;
      writeFileSync(join(testDir, 'vite.config.js'), simpleConfig);

      const result = smartInject({
        remote: '/scripts/monitor.js',
        dryRun: true
      }, testDir);

      assert.strictEqual(result, true);
    });

    test('应该处理 TypeScript 配置文件', () => {
      const tsConfig = `import { defineConfig } from 'vite'
import react from '@vitejs/plugin-react'

export default defineConfig({
  plugins: [react()]
})`;
      writeFileSync(join(testDir, 'vite.config.ts'), tsConfig);

      const result = smartInject({
        remote: '/scripts/monitor.js',
        dryRun: true
      }, testDir);

      assert.strictEqual(result, true);
    });
  });

  describe('Next.js App Router 注入', () => {
    test('应该成功注入到 app/layout.tsx', () => {
      // 创建 Next.js App Router 结构
      mkdirSync(join(testDir, 'app'), { recursive: true });
      writeFileSync(join(testDir, 'next.config.js'), 'module.exports = {}');

      const layoutContent = `import type { Metadata } from 'next'
import { Inter } from 'next/font/google'
import './globals.css'

const inter = Inter({ subsets: ['latin'] })

export const metadata: Metadata = {
  title: 'Next.js App',
  description: 'Generated by create next app',
}

export default function RootLayout({
  children,
}: {
  children: React.ReactNode
}) {
  return (
    <html lang="en">
      <body className={inter.className}>{children}</body>
    </html>
  )
}`;
      writeFileSync(join(testDir, 'app', 'layout.tsx'), layoutContent);

      const result = smartInject({
        remote: 'http://localhost:9000/dev-monitor.js',
        dryRun: true
      }, testDir);

      assert.strictEqual(result, true);
    });

    test('应该处理 app/layout.js', () => {
      mkdirSync(join(testDir, 'app'), { recursive: true });
      writeFileSync(join(testDir, 'next.config.js'), 'module.exports = {}');

      const jsLayout = `import './globals.css'

export default function RootLayout({ children }) {
  return (
    <html lang="en">
      <body>{children}</body>
    </html>
  )
}`;
      writeFileSync(join(testDir, 'app', 'layout.js'), jsLayout);

      const result = smartInject({
        remote: '/scripts/monitor.js',
        dryRun: true
      }, testDir);

      assert.strictEqual(result, true);
    });
  });

  describe('Next.js Pages Router 注入', () => {
    test('应该成功注入到 pages/_document.tsx', () => {
      mkdirSync(join(testDir, 'pages'), { recursive: true });
      writeFileSync(join(testDir, 'next.config.js'), 'module.exports = {}');

      const documentContent = `import { Html, Head, Main, NextScript } from 'next/document'

export default function Document() {
  return (
    <Html lang="en">
      <Head>
        <meta charSet="utf-8" />
        <meta name="viewport" content="width=device-width, initial-scale=1" />
      </Head>
      <body>
        <Main />
        <NextScript />
      </body>
    </Html>
  )
}`;
      writeFileSync(join(testDir, 'pages', '_document.tsx'), documentContent);

      const result = smartInject({
        remote: 'http://localhost:9000/dev-monitor.js',
        dryRun: true
      }, testDir);

      assert.strictEqual(result, true);
    });

    test('应该处理 pages/_document.js', () => {
      mkdirSync(join(testDir, 'pages'), { recursive: true });
      writeFileSync(join(testDir, 'next.config.js'), 'module.exports = {}');

      const jsDocument = `const { Html, Head, Main, NextScript } = require('next/document')

export default function Document() {
  return (
    <Html lang="en">
      <Head>
        <title>My App</title>
      </Head>
      <body>
        <Main />
        <NextScript />
      </body>
    </Html>
  )
}`;
      writeFileSync(join(testDir, 'pages', '_document.js'), jsDocument);

      const result = smartInject({
        remote: '/scripts/monitor.js',
        dryRun: true
      }, testDir);

      assert.strictEqual(result, true);
    });
  });

  describe('混合模式处理', () => {
    test('应该优先注入到 app/layout', () => {
      // 创建混合模式结构
      mkdirSync(join(testDir, 'app'), { recursive: true });
      mkdirSync(join(testDir, 'pages'), { recursive: true });
      writeFileSync(join(testDir, 'next.config.js'), 'module.exports = {}');

      writeFileSync(join(testDir, 'app', 'layout.tsx'), 'export default function Layout() { return <div>App Layout</div>; }');
      writeFileSync(join(testDir, 'pages', '_document.tsx'), 'export default function Document() { return <div>Document</div>; }');

      const result = smartInject({
        remote: '/scripts/monitor.js',
        dryRun: true
      }, testDir);

      assert.strictEqual(result, true);
    });
  });

  describe('错误处理', () => {
    test('应该处理不支持的框架类型', () => {
      writeFileSync(join(testDir, 'index.html'), '<html></html>');

      try {
        smartInject({
          remote: '/scripts/monitor.js',
          dryRun: false
        }, testDir);
        assert.fail('应该抛出错误');
      } catch (error) {
        assert.match(error.message, /不支持的项目类型/);
      }
    });

    test('应该处理配置文件不存在的情况', () => {
      writeFileSync(join(testDir, 'next.config.js'), 'module.exports = {}');
      // 不创建 layout 文件

      try {
        smartInject({
          remote: '/scripts/monitor.js',
          dryRun: false
        }, testDir);
        assert.fail('应该抛出错误');
      } catch (error) {
        assert.match(error.message, /未找到/);
      }
    });

    test('应该处理无效的配置文件', () => {
      writeFileSync(join(testDir, 'vite.config.js'), 'invalid javascript content');

      try {
        smartInject({
          remote: '/scripts/monitor.js',
          dryRun: false
        }, testDir);
        assert.fail('应该抛出错误');
      } catch (error) {
        assert.ok(error.message.length > 0); // 应该有某种错误信息
      }
    });
  });

  describe('实际文件修改测试', () => {
    test('应该实际修改 Vite 配置文件', () => {
      const originalConfig = `import { defineConfig } from 'vite'
import react from '@vitejs/plugin-react'

export default defineConfig({
  plugins: [react()],
  server: {
    port: 3000
  }
})`;

      writeFileSync(join(testDir, 'vite.config.js'), originalConfig);

      // 执行实际注入
      const result = smartInject({
        remote: '/scripts/monitor.js',
        dryRun: false,
        verbose: false
      }, testDir);

      assert.strictEqual(result, true);

      // 验证文件被修改
      const modifiedContent = readFileSync(join(testDir, 'vite.config.js'), 'utf8');
      assert.match(modifiedContent, /dev-inject-plugin/);
      assert.match(modifiedContent, /scripts\/monitor\.js/);

      // 验证原始内容保留
      assert.match(modifiedContent, /defineConfig/);
      assert.match(modifiedContent, /react\(\)/);
    });

    test('应该能够移除注入的内容', () => {
      // 先注入
      smartInject({
        remote: '/scripts/monitor.js',
        dryRun: false
      }, testDir);

      // 然后移除
      const result = removeInjection({
        dryRun: false,
        verbose: false
      }, testDir);

      assert.strictEqual(result, true);

      // 验证插件被移除
      const cleanedContent = readFileSync(join(testDir, 'vite.config.js'), 'utf8');
      assert(!cleanedContent.includes('dev-inject-plugin'));
    });
  });

  describe('不同脚本类型', () => {
    test('应该处理 HTTP URL', () => {
      writeFileSync(join(testDir, 'vite.config.js'), 'export default { plugins: [] }');

      const result = smartInject({
        remote: 'https://cdn.example.com/monitor.js',
        dryRun: true
      }, testDir);

      assert.strictEqual(result, true);
    });

    test('应该处理本地路径', () => {
      writeFileSync(join(testDir, 'vite.config.js'), 'export default { plugins: [] }');

      const result = smartInject({
        remote: '/assets/dev-monitor.js',
        dryRun: true
      }, testDir);

      assert.strictEqual(result, true);
    });
  });
});