import { join } from 'path';
import { readFileSync } from 'fs';

import { DataSource } from 'typeorm';

import * as toml from 'toml';
import * as dotenv from 'dotenv';

dotenv.config();

const CONFIG_ENV = process.env.NODE_ENV === 'production' ? 'prod' : 'dev';
const CONFIG_FILENAME = process.env.CONFIG || `config.${CONFIG_ENV}.toml`;
const CONFIG_PATH = join(process.cwd(), CONFIG_FILENAME);

// toml.parse returns an object that doesn't have the correct prototype,
// thus this JSON workaround is used.
const config = JSON.parse(
  JSON.stringify(toml.parse(readFileSync(CONFIG_PATH, { encoding: 'utf-8' }))),
);

if (config.database.entities?.length) {
  config.database.entities = config.database.entities.map((path: string) =>
    join(process.cwd(), path),
  );
}

if (config.database.migrations?.length) {
  config.database.migrations = config.database.migrations.map((path: string) =>
    join(process.cwd(), path),
  );
}

export const AppDataSource = new DataSource(config.database);