const { Pool } = require("pg");

function buildPoolConfig() {
  if (process.env.DATABASE_URL) {
    return {
      connectionString: process.env.DATABASE_URL,
    };
  }

  return {
    user: process.env.DB_USER,
    password: process.env.DB_PASS,
    host: process.env.DB_HOST,
    database: process.env.DB_NAME,
    port: Number(process.env.DB_PORT || 5432),
  };
}

const pool = new Pool(buildPoolConfig());

module.exports = pool;