#!/usr/bin/env node
/**
 * 验证前端环境设置
 * 
 * 检查:
 * - Node.js版本
 * - 依赖包安装
 * - TypeScript配置
 * - 构建配置
 */

import { execSync } from 'child_process';
import { existsSync, readFileSync } from 'fs';
import { join, dirname } from 'path';
import { fileURLToPath } from 'url';

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

function checkNodeVersion() {
    console.log('\n检查Node.js版本:');
    try {
        const version = process.version;
        const majorVersion = parseInt(version.slice(1).split('.')[0]);
        
        console.log(`  ✓ Node.js版本: ${version}`);
        
        if (majorVersion < 18) {
            console.log('  ❌ 需要Node.js 18或更高版本');
            return false;
        }
        
        console.log('  ✓ Node.js版本符合要求');
        return true;
    } catch (error) {
        console.log(`  ❌ Node.js检查失败: ${error.message}`);
        return false;
    }
}

function checkPackageManager() {
    console.log('\n检查包管理器:');
    try {
        const npmVersion = execSync('npm --version', { encoding: 'utf8' }).trim();
        console.log(`  ✓ npm版本: ${npmVersion}`);
        
        try {
            const yarnVersion = execSync('yarn --version', { encoding: 'utf8' }).trim();
            console.log(`  ✓ yarn版本: ${yarnVersion}`);
        } catch {
            console.log('  ⚠️  yarn未安装 (可选)');
        }
        
        return true;
    } catch (error) {
        console.log(`  ❌ 包管理器检查失败: ${error.message}`);
        return false;
    }
}

function checkDependencies() {
    console.log('\n检查依赖包:');
    
    const nodeModulesPath = join(__dirname, 'node_modules');
    if (!existsSync(nodeModulesPath)) {
        console.log('  ❌ node_modules目录不存在');
        console.log('  请运行: yarn install 或 npm install');
        return false;
    }
    
    console.log('  ✓ node_modules目录存在');
    
    // 检查关键依赖
    const criticalDeps = [
        'react',
        'react-dom',
        'vite',
        'typescript',
        'antd',
        '@ant-design/icons',
        'react-router-dom',
        'axios'
    ];
    
    let allDepsOk = true;
    for (const dep of criticalDeps) {
        const depPath = join(nodeModulesPath, dep);
        if (existsSync(depPath)) {
            try {
                const packageJson = JSON.parse(
                    readFileSync(join(depPath, 'package.json'), 'utf8')
                );
                console.log(`  ✓ ${dep}: ${packageJson.version}`);
            } catch {
                console.log(`  ✓ ${dep}: 已安装`);
            }
        } else {
            console.log(`  ❌ ${dep}: 未安装`);
            allDepsOk = false;
        }
    }
    
    return allDepsOk;
}

function checkConfiguration() {
    console.log('\n检查配置文件:');
    
    const configFiles = [
        'package.json',
        'vite.config.ts',
        'tsconfig.json',
        'index.html'
    ];
    
    let allConfigsOk = true;
    for (const file of configFiles) {
        const filePath = join(__dirname, file);
        if (existsSync(filePath)) {
            console.log(`  ✓ ${file}`);
        } else {
            console.log(`  ❌ ${file} 不存在`);
            allConfigsOk = false;
        }
    }
    
    return allConfigsOk;
}

function checkTypeScript() {
    console.log('\n检查TypeScript:');
    try {
        execSync('npx tsc --noEmit', { 
            encoding: 'utf8',
            stdio: 'pipe'
        });
        console.log('  ✓ TypeScript编译检查通过');
        return true;
    } catch (error) {
        console.log('  ❌ TypeScript编译检查失败');
        console.log(`  错误: ${error.message}`);
        return false;
    }
}

function checkBuild() {
    console.log('\n检查构建配置:');
    try {
        // 只检查配置，不实际构建
        execSync('npx vite build --dry-run', { 
            encoding: 'utf8',
            stdio: 'pipe'
        });
        console.log('  ✓ Vite构建配置正确');
        return true;
    } catch (error) {
        // dry-run可能不被支持，尝试其他方式
        try {
            execSync('npx vite --version', { encoding: 'utf8', stdio: 'pipe' });
            console.log('  ✓ Vite配置可用');
            return true;
        } catch {
            console.log('  ❌ Vite构建配置检查失败');
            return false;
        }
    }
}

function main() {
    console.log('='.repeat(50));
    console.log('Frontend 环境验证');
    console.log('='.repeat(50));
    
    const checks = [
        { name: 'Node.js版本', fn: checkNodeVersion },
        { name: '包管理器', fn: checkPackageManager },
        { name: '依赖包', fn: checkDependencies },
        { name: '配置文件', fn: checkConfiguration },
        { name: 'TypeScript', fn: checkTypeScript },
        { name: '构建配置', fn: checkBuild }
    ];
    
    const results = [];
    for (const { name, fn } of checks) {
        try {
            const result = fn();
            results.push({ name, result });
        } catch (error) {
            console.log(`  ❌ ${name}检查失败: ${error.message}`);
            results.push({ name, result: false });
        }
    }
    
    console.log('\n' + '='.repeat(50));
    console.log('验证结果:');
    console.log('='.repeat(50));
    
    let allPassed = true;
    for (const { name, result } of results) {
        const status = result ? '✓ 通过' : '❌ 失败';
        console.log(`  ${name}: ${status}`);
        if (!result) allPassed = false;
    }
    
    if (allPassed) {
        console.log('\n🎉 所有检查通过! 前端环境设置正确。');
        console.log('\n可以开始开发:');
        console.log('  yarn dev           - 启动开发服务器');
        console.log('  yarn build         - 构建生产版本');
        console.log('  yarn test          - 运行测试');
        console.log('  yarn lint          - 代码检查');
        console.log('\n访问: http://localhost:3000');
    } else {
        console.log('\n⚠️  部分检查失败，请检查上述问题。');
        console.log('\n常见解决方案:');
        console.log('  yarn install       - 重新安装依赖');
        console.log('  yarn cache clean   - 清理缓存');
        console.log('  rm -rf node_modules && yarn install - 完全重装');
    }
    
    console.log('='.repeat(50));
}

main();