import { config } from 'dotenv';
import path from 'path';

// 加载环境变量
config({ path: path.resolve(process.cwd(), '.env') });
console.log('[NODE_ENV]:', process.env.NODE_ENV);

// 基础配置
const baseConfig = {
    NODE_ENV: process.env.NODE_ENV || 'development',
    server: {
        port: process.env.PORT || 9000,
        host: process.env.HOST || 'localhost',
        backlog: process.env.BACKLOG || 511,
    },
    logger: {
        level: process.env.LOG_LEVEL || 'trace',
        filePath: process.env.LOG_FILE || '../logs/app.log',
        console: false,
    },
    pluginOptions: {
        name: process.env.PLUGIN_NAME || 'default',
        prefix: process.env.API_PREFIX || '/api',
    },
    db: {
        host: process.env.DB_HOST || '127.0.0.1',
        port: process.env.DB_PORT || 3306,
        user: process.env.DB_USER || 'root',
        password: process.env.DB_PASSWORD,
        database: process.env.DB_NAME || 'yuheng',
        ssl: process.env.NODE_ENV === 'production' ? { rejectUnauthorized: true } : null,
    },
};

// 环境特定配置
const envConfig = {
    production: {
        server: {
            host: '0.0.0.0',
        },
        logger: {
            level: 'warn',
        },
    },
    development: {
        logger: {
            level: 'trace',
            console: true,
        },
    },
};

// 使用深度合并代替展开操作符
function deepMerge(target, source) {
    for (const key of Object.keys(source)) {
        if (source[key] instanceof Object && key in target) {
            Object.assign(source[key], deepMerge(target[key], source[key]));
        }
    }
    return Object.assign({}, target, source);
}

export default deepMerge(baseConfig, envConfig[process.env.NODE_ENV] || envConfig.development);