import pg from 'pg';

// bigint (int8) columns hold Minecraft counters; they stay far below 2^53, so parse as number.
pg.types.setTypeParser(20, (v) => Number(v));
// numeric is used for aggregates (SUM over bigint)
pg.types.setTypeParser(1700, (v) => Number(v));

export type Pool = pg.Pool;
export type PoolClient = pg.PoolClient;

export function createPool(url: string, max = 10): pg.Pool {
  return new pg.Pool({ connectionString: url, max });
}

export async function withTx<T>(pool: pg.Pool, fn: (c: pg.PoolClient) => Promise<T>): Promise<T> {
  const client = await pool.connect();
  try {
    await client.query('BEGIN');
    const result = await fn(client);
    await client.query('COMMIT');
    return result;
  } catch (err) {
    await client.query('ROLLBACK').catch(() => {});
    throw err;
  } finally {
    client.release();
  }
}