require("dotenv").config();

const required = ["DB_HOST", "DB_NAME", "DB_USER"];
const missing = required.filter((name) => !process.env[name]);
if (missing.length) throw new Error(`Missing migration environment variables: ${missing.join(", ")}`);

const configuration = {
  username: process.env.DB_USER,
  password: process.env.DB_PASSWORD || "",
  database: process.env.DB_NAME,
  host: process.env.DB_HOST,
  port: Number(process.env.DB_PORT || 3306),
  dialect: "mysql",
  logging: false,
};

module.exports = { development: configuration, test: configuration, production: configuration };