import DotEnv from "dotenv";

interface AppConfig {
  ENVIRONMENT: string,
  SERVER_PORT: number,
  REDIS_ADDRESS: string,
  REDIS_PORT: number,
  MONGODB_ADDRESS: string,
  MONGODB_PORT: number,
  MONGODB_DB: string,
  SESSION_SECRET: string,
  GOOGLE_OAUTH_CLIENT_ID: string,
  GOOGLE_OAUTH_CLIENT_SECRET: string
}

const envOverridesUntreated = {
  GOOGLE_OAUTH_CLIENT_ID: process.env.GOOGLE_OAUTH_CLIENT_ID,
  GOOGLE_OAUTH_CLIENT_SECRET: process.env.GOOGLE_OAUTH_CLIENT_ID,
  SESSION_SECRET: process.env.SESSION_SECRET,
  REDIS_PORT: process.env.REDIS_PORT,
  REDIS_ADDRESS: process.env.REDIS_ADDRESS,
  MONGODB_PORT: process.env.MONGODB_PORT,
  MONGODB_ADDRESS: process.env.MONGODB_ADDRESS,
};

const envOverridesTreated: any = Object.entries(envOverridesUntreated).reduce((overrides, [key, value]) => {
  if (value) {
    overrides[key] = value;
  }
  return overrides;
}, {});

const AppConfig: AppConfig = Object.freeze({ ...DotEnv.config().parsed, ...envOverridesTreated }) as unknown as AppConfig;

export default AppConfig;