import path from 'path';
import fs from 'fs';
import dotenv from 'dotenv';

interface EnvConfig {
  [key: string]: string;
}

//读取env 文件配置
const loadEnv = () => {
  const envRoot = path.resolve(process.cwd());
  const mode = getMode();

  // 加载默认环境变量
  const envFilePath = path.resolve(envRoot, `./env`);
  if (fs.existsSync(envFilePath)) {
    dotenv.config({ path: envFilePath });
  }

  //加载特定环境变量
  const envModeFilePath = path.resolve(envRoot, `./env/${mode}`);
  if (fs.existsSync(envModeFilePath)) {
    dotenv.config({ path: envModeFilePath });
  }
};

//获取指令参数
const getMode = () => {
  const args = process.argv
    .find((item) => item.startsWith('--mode'))
    ?.split('=')[1];

  if (args) return args;
  const mode = process.env.NODE_ENV;
  return mode || 'development';
};

const isDev = () => {
  return getMode() === 'development';
};

const isProd = () => {
  return getMode() === 'production';
};

export { loadEnv, getMode, isDev, isProd };