var mysql = require('mysql2/promise');
require('dotenv').config()

// var connection = mysql.createConnection({
//   host: process.env.DB_HOST,
//   user: process.env.DB_USER,
//   password: process.env.DB_PASSWORD,
//   port: process.env.DB_PORT,
//   database: 'travopti'
// });

const pool =  mysql.createPool({
  connectionLimit: 10,
  host: process.env.DB_HOST,
  user: process.env.DB_USER,
  password: process.env.DB_PASSWORD,
  port: process.env.DB_PORT,
  database: 'travopti',
  // typeCast: function (field, next) {
  //   if (field.type == "INT") {
  //     var value = field.string();
  //     return (value === null) ? null : Number(value);
  //   }
  //   return next();
  // }
  decimalNumbers: true
});

pool.getConnection()
  .then(function (connection) {
    console.log(`Connected to database: ${process.env.DB_HOST}`);
    //pool.releaseConnection(connection)
  })
  .catch(function (error) {
    console.error(error.message);
  });

module.exports = pool;

// let travoptidb = {}
// travoptidb.all = () => {
//   return new Promise((resolve, reject) => {
//     pool.query(`SELECT * FROM regions`, (err, results) => {
//       if (err) {
//         return reject(err)
//       }
//       return resolve(results)
//     })
//   })
// }

// connection.connect((err) => {
//   if (err) throw err;
//   console.log('Database connected!')
// });


// exports.getRegions = () => {
//   let sql = `SELECT * FROM regions`;
//   console.log(connection.state)
//   if (connection.state === 'disconnected') {
//     setTimeout(() => console.log('waiting...'), 1000);
//   }
//   console.log('executed')
//   let res = {}
//   connection.query(sql, (error, results, fields) => {
//     if (error) {
//       return console.error(error.message);
//     }
//     console.log('innercallback(1)')
//     res = results[0]
//   });
//   console.log('outsidecallback(2)')
//   return res;
// }

// exports.getBYTdata = () => {
//   connection.query(`SELECT * FROM regions_byt`, (error, results, fields) => {
//     if (error) {
//       return console.error(error.message);
//     }
//     console.log(results[0])
//     nres = results.map((obj) => {
//       return obj.region
//     })
//     //console.log(nres);
//   });
// }

// exports.end = () => connection.end();

// module.exports = connection;