const sql = require('mssql');

const config = {
  server: process.env.DB_HOST,
  port: parseInt(process.env.DB_PORT),
  user: process.env.DB_USER,
  password: process.env.DB_PASSWORD,
  database: process.env.DB_NAME,
  options: {
    encrypt: process.env.DB_ENCRYPT === 'true',
    trustServerCertificate: process.env.DB_TRUST_CERT === 'true',
  },
  pool: {
    max: 10,
    min: 2,
    idleTimeoutMillis: 30000,
  },
};

let pool = null;

async function getPool() {
  if (!pool) {
    pool = await sql.connect(config);
    console.log('✅ Conectado ao SQL Server');
  }
  return pool;
}

async function closePool() {
  if (pool) {
    await pool.close();
    pool = null;
  }
}

module.exports = { getPool, closePool, sql };