config.ts

const ENV = {
  development: {
    port: 7000,
    mongoURI: 'mongodb://localhost:27017/chat-app',
  },
  production: {
    port: 7000,
    mongoURI: 'mongodb://localhost:27017/chat-app',
  },
  staging: {
    port: 7000,
    mongoURI: 'mongodb://localhost:27017/chat-app',
  }
};

type ENV = 'development' | 'staging' | 'production'; 

function getEnvVars(env: ENV) {
  const config = ENV[env];

  if (config) {
    return config;
  }

  console.log(config);

  return ENV.development;
}

export const __DEV__ = process.env.NODE_ENV === 'development';

export default getEnvVars((process.env.NODE_ENV as ENV));