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#!/usr/bin/env node
import { program } from 'commander';
import inquirer from 'inquirer';
import fs from 'node:fs';
import { execSync } from 'node:child_process';
import path from 'node:path';
import axios from 'axios';
import ora from 'ora';
import chalk from 'chalk';
const { existsSync, readFileSync, writeFileSync } = fs;
const { join } = path;

const CONFIG_PATH = join(process.env.HOME || process.env.USERPROFILE, '.npm-mirror.json');

const DEFAULT_MIRRORS = {
    npm: {
        registry: 'https://registry.npmjs.org',
        home: 'https://www.npmjs.com',
        description: '官方 NPM 镜像'
    },
    taobao: {
        registry: 'https://registry.npmmirror.com',
        home: 'https://npmmirror.com',
        description: '淘宝 NPM 镜像，国内推荐'
    },
    huawei: {
        registry: 'https://mirrors.huaweicloud.com/repository/npm/',
        home: 'https://developer.huawei.com',
        description: '华为 NPM 镜像'
    },
    cnpm: {
        registry: 'https://r.cnpmjs.org',
        home: 'https://cnpmjs.org',
        description: 'cnpm 镜像'
    }
};


function readConfig() {
    if (existsSync(CONFIG_PATH)) {
        try {
            return JSON.parse(readFileSync(CONFIG_PATH, 'utf8'));
        } catch (error) {
            console.error(chalk.red('配置文件解析失败，将使用默认配置'));
        }
    }
    return { current: 'npm', mirrors: DEFAULT_MIRRORS };
}


function saveConfig(config) {
    writeFileSync(CONFIG_PATH, JSON.stringify(config, null, 2), 'utf8');
}


function getCurrentMirror(config) {
    return config.mirrors[config.current] || config.mirrors.npm;
}


function setMirror(name, config) {
    if (!config.mirrors[name]) {
        console.error(chalk.red(`镜像源 ${name} 不存在`));
        return false;
    }

    try {
        execSync(`npm config set registry ${config.mirrors[name].registry}`);
        config.current = name;
        saveConfig(config);
        console.log(chalk.green(`✅ 已成功将镜像源设置为 ${name}`));
        return true;
    } catch (error) {
        console.error(chalk.red(`设置镜像源失败: ${error.message}`));
        return false;
    }
}
const config = readConfig();

async function testMirrorSpeed(registry) {
    const testUrl = `${registry}/react/latest`;
    const spinner = ora(`正在测试 ${registry} 速度...`).start();
    try {
        const start = Date.now();
        await axios.head(testUrl, { timeout: 5000 });
        const end = Date.now();
        const time = end - start;
        spinner.succeed(`测试完成: ${registry} - ${time}ms`);
        return time;
    } catch (error) {
        spinner.fail(`测试失败: ${registry} - ${error.message}`);
        return Infinity;
    }
}


function listMirrors() {
    console.log(chalk.bold('\n可用镜像源列表:\n'));
    Object.entries(config.mirrors).forEach(([name, mirror]) => {
        const isCurrent = name === config.current;
        const prefix = isCurrent ? chalk.green('* ') : '  ';
        console.log(`${prefix}${chalk.cyan(name)} - ${mirror.description}`);
        console.log(`  ${chalk.gray('registry:')} ${mirror.registry}`);
        console.log(`  ${chalk.gray('home:')} ${mirror.home}\n`);
    });
}


function showCurrentMirror() {
    const current = getCurrentMirror(config);
    console.log(chalk.cyan(`当前使用的镜像源: ${config.current}`));
    console.log(chalk.gray(`registry: ${current.registry}`));
    console.log(chalk.gray(`home: ${current.home}`));
}


function addCustomMirror(name, registry, home = '无', description = '自定义镜像源') {
    if (!name || !registry) {
        console.log(chalk.red('请输入正确的镜像源信息'));
        return;
    }
    if (config.mirrors[name]) {
        console.log(chalk.red(`镜像源 ${name} 已存在`));
        return;
    }
    config.mirrors[name] = { registry, home, description };
    saveConfig(config);
    console.log(chalk.green(`✅ 已添加镜像源 ${name}`));
}


async function testMirror() {
    console.log(chalk.bold('\n正在测试所有镜像源速度...\n'));
    const results = [];

    for (const [name, mirror] of Object.entries(config.mirrors)) {
        const time = await testMirrorSpeed(mirror.registry);
        results.push({ name, time });
    }

    console.log(chalk.bold('\n测试结果（按速度排序）:\n'));
    results.sort((a, b) => a.time - b.time).forEach(({ name, time }, index) => {
        const isCurrent = name === config.current;
        const prefix = isCurrent ? chalk.green('* ') : '  ';
        const timeStr = time === Infinity ? '超时' : `${time}ms`;
        const rank = index + 1;
        console.log(`${prefix}${rank}. ${chalk.cyan(name)} - ${timeStr}`);
    });
}

async function main() {
    program
        .version('1.0.0')
        .description('NPM 镜像源管理工具');

    program
        .command('list')
        .description('列出所有可用镜像源')
        .action(listMirrors);

    program
        .command('use <name>')
        .description('切换到指定镜像源')
        .action((name) => {
            setMirror(name, config);
        });

    program
        .command('current')
        .description('查看当前使用的镜像源')
        .action(showCurrentMirror);

    program
        .command('add <name> <registry> [home] [description]')
        .description('添加自定义镜像源')
        .action(addCustomMirror);

    program
        .command('delete <name>')
        .description('删除镜像源')
        .action((name) => {
            if (name === 'npm' || name === 'taobao') {
                console.error(chalk.red('不能删除内置镜像源'));
                return;
            }

            if (!config.mirrors[name]) {
                console.error(chalk.red(`镜像源 ${name} 不存在`));
                return;
            }

            if (config.current === name) {
                config.current = 'npm';
            }

            delete config.mirrors[name];
            saveConfig(config);
            console.log(chalk.green(`✅ 已删除镜像源 ${name}`));
        });

    program
        .command('test')
        .description('测试所有镜像源速度')
        .action(testMirror);

    program
        .command('interactive')
        .description('交互式界面')
        .action(async () => {
            const { action } = await inquirer.prompt([{
                type: 'list',
                name: 'action',
                message: '请选择操作:',
                choices: [
                    '查看当前镜像源',
                    '列出所有镜像源',
                    '切换镜像源',
                    '添加自定义镜像源',
                    '测试镜像源速度',
                    '退出'
                ]
            }]);

            switch (action) {
                case '查看当前镜像源':
                    showCurrentMirror();
                    break;
                case '列出所有镜像源':
                    listMirrors();
                    break;
                case '切换镜像源':
                    const { mirror } = await inquirer.prompt([{
                        type: 'list',
                        name: 'mirror',
                        message: '选择要使用的镜像源:',
                        choices: Object.keys(config.mirrors)
                    }]);
                    setMirror(mirror, config);
                    break;
                case '添加自定义镜像源':
                    const answers = await inquirer.prompt([
                        { type: 'input', name: 'name', message: '镜像源名称:' },
                        { type: 'input', name: 'registry', message: 'registry 地址:' },
                        { type: 'input', name: 'home', message: '主页地址:' },
                        { type: 'input', name: 'description', message: '描述信息:' }
                    ]);
                    addCustomMirror(answers.name, answers.registry, answers.home, answers.description);
                    break;
                case '测试镜像源速度':
                    testMirror();
                    break;
                case '退出':
                    console.log(chalk.yellow('👋 再见!'));
                    break;
            }
        });

    
    if (process.argv.length < 3) {
        program.help();
    } else {
        program.parse(process.argv);
    }
}

main();