#!/usr/bin/env node
/**
 * 将 data 目录内容拷贝到指定目录（本地开发或服务器），并生成对应 nginx 配置。
 *
 * 用法:
 *   node scripts/deploy-assets.js              # 默认：拷贝到本地 pipi-assets
 *   node scripts/deploy-assets.js --local      # 同上
 *   node scripts/deploy-assets.js --server     # 拷贝到 /var/www/pipi-assets/
 *   node scripts/deploy-assets.js --target /path/to/dir  # 自定义目标目录
 *
 * 每次运行都会生成 nginx 配置（root 为当前目标目录），默认输出到 scripts/nginx-pipi-assets.conf。
 * 使用 --nginx /path/to/file 可指定 nginx 配置输出路径。
 */

const fs = require('fs');
const path = require('path');

const PACKAGE_ROOT = path.resolve(__dirname, '..');
const DATA_DIR = path.join(PACKAGE_ROOT, 'data');
const LOCAL_TARGET = path.join(PACKAGE_ROOT, 'pipi-assets');
const SERVER_TARGET = '/var/www/pipi-assets';
const DEFAULT_NGINX_OUTPUT = path.join(__dirname, 'nginx-pipi-assets.conf');

function parseArgs() {
    const args = process.argv.slice(2);
    let target = null;
    let nginxOutput = null;

    for (let i = 0; i < args.length; i++) {
        if (args[i] === '--local' || args[i] === '--server') {
            if (target) {
                console.warn('警告: 多次指定目标，以最后一次为准');
            }
            target = args[i] === '--local' ? LOCAL_TARGET : SERVER_TARGET;
        } else if (args[i] === '--target' && args[i + 1]) {
            target = path.resolve(args[++i]);
        } else if (args[i] === '--nginx' && args[i + 1] && !args[i + 1].startsWith('--')) {
            nginxOutput = path.resolve(args[++i]);
        }
    }

    if (target === null) {
        target = LOCAL_TARGET;
    }
    return { target, nginxOutput };
}

function copyDirRecursive(src, dest) {
    if (!fs.existsSync(src)) return;
    fs.mkdirSync(dest, { recursive: true });
    const entries = fs.readdirSync(src, { withFileTypes: true });
    for (const entry of entries) {
        const srcPath = path.join(src, entry.name);
        const destPath = path.join(dest, entry.name);
        if (entry.isDirectory()) {
            copyDirRecursive(srcPath, destPath);
        } else {
            fs.copyFileSync(srcPath, destPath);
        }
    }
}

function deployDataToTarget(targetDir) {
    if (!fs.existsSync(DATA_DIR)) {
        console.error('错误: data 目录不存在:', DATA_DIR);
        process.exit(1);
    }

    const entries = fs.readdirSync(DATA_DIR, { withFileTypes: true });
    if (entries.length === 0) {
        console.log('data 目录为空，跳过拷贝');
        return;
    }

    fs.mkdirSync(targetDir, { recursive: true });

    for (const entry of entries) {
        const srcPath = path.join(DATA_DIR, entry.name);
        const destPath = path.join(targetDir, entry.name);
        if (entry.isDirectory()) {
            if (fs.existsSync(destPath)) {
                fs.rmSync(destPath, { recursive: true });
            }
            copyDirRecursive(srcPath, destPath);
            console.log('  已拷贝:', entry.name + '/');
        } else {
            fs.copyFileSync(srcPath, destPath);
            console.log('  已拷贝:', entry.name);
        }
    }

    console.log('资源已拷贝到:', targetDir);
}

function generateNginxConfig(rootPath, serverName = 'assets.yourdomain.com') {
    return `# pipi-assets 静态资源站点
# 生成后请将 server_name 改为你的二级域名，并视需放到 /etc/nginx/sites-available/ 后启用

server {
    listen 80;
    server_name ${serverName};

    root ${rootPath};
    autoindex off;

    location /voice/ {
        alias ${rootPath}/voice/;
        add_header Cache-Control "public, max-age=86400";
    }
    location /char/ {
        alias ${rootPath}/char/;
        add_header Cache-Control "public, max-age=3600";
        add_header Access-Control-Allow-Origin "*";
    }
    location /image/ {
        alias ${rootPath}/image/;
        add_header Cache-Control "public, max-age=86400";
    }

    location /health {
        return 200 "ok";
        add_header Content-Type text/plain;
    }
}
`;
}

function main() {
    const { target, nginxOutput } = parseArgs();

    console.log('目标目录:', target);
    deployDataToTarget(target);

    const nginxPath = nginxOutput ?? DEFAULT_NGINX_OUTPUT;
    const config = generateNginxConfig(target);
    fs.writeFileSync(nginxPath, config, 'utf8');
    console.log('Nginx 配置已写入:', nginxPath);
}

main();