const mysql = require("mysql2")
const pool = mysql.createPool({
	host: process.env.DBHOST,
	port: process.env.DBPORT,
	user: process.env.DBUSER,
	password: process.env.DBPASSWORD,
	database: process.env.DATABASE,
	connectionLimit: 100,
	multipleStatements: true,
	// waitForConnections: true,
	maxIdle: 10, // max idle connections, the default value is the same as `connectionLimit`
	idleTimeout: 60000, // idle connections timeout, in milliseconds, the default value 60000
	queueLimit: 50,
	// enableKeepAlive: true,
	// keepAliveInitialDelay: 0,
})

const connection = () => {
	return new Promise((resolve, reject) => {
		pool.getConnection((err, connection) => {
			if (err) {
				// Log the error and reject the promise
				console.error("Error getting connection from pool:", err)
				return reject(err)
			}
			const query = (sql, binding) => {
				return new Promise((resolve, reject) => {
					connection.query(sql, binding, (err, result) => {
						if (err) {
							// Log the query error for debugging
							console.error("Error executing query:", err, { sql, binding })
							return reject(err)
						}
						resolve(result)
					})
				})
			}

			const release = () => {
				return new Promise((resolve, reject) => {
					if (err) {
						// Log error in release method if exists
						console.error("Error during connection release:", err)
						return reject(err)
					}
					resolve(connection.release())
				})
			}

			resolve({
				query,
				release,
			})
		})
	})
}

const query = (sql, binding) => {
	return new Promise((resolve, reject) => {
		pool.query(sql, binding, (err, result, fields) => {
			if (err) {
				// Log the error for debugging
				console.error("Error executing pooled query:", err, { sql, binding })
				return reject(err)
			}
			resolve(result)
		})
	})
}
module.exports = {
	pool,
	connection,
	query,
}