import mysql from "mysql2/promise";

const pool = mysql.createPool({
  host: process.env.DB_HOST || "127.0.0.1",
  port: Number(process.env.DB_PORT || 3306),
  user: process.env.DB_USER,
  password: process.env.DB_PASS,
  database: process.env.DB_NAME,
  waitForConnections: true,
  connectionLimit: 5,
  queueLimit: 0,
  charset: "utf8mb4",
});

export async function query(sql, params = []) {
  const [rows] = await pool.execute(sql, params);
  return rows;
}

export async function one(sql, params = []) {
  const rows = await query(sql, params);
  return rows[0] || null;
}

export async function exec(sql, params = []) {
  const [result] = await pool.execute(sql, params);
  return result; // { insertId, affectedRows, ... }
}

export default pool;