package conn

import (
	"database/sql"
	"fmt"
	_ "github.com/go-sql-driver/mysql"
	"github.com/pkg/errors"
	"log"
)

type MySQLConn struct {
	Host     string
	Port     int
	Username string
	Password string
	DBName   string
}

var mysqlDB *sql.DB

// InitMySQLConn 初始化mysql连接
func InitMySQLConn(cfg *MySQLConn) error {
	var err error
	mysqlDB, err = sql.Open("mysql", fmt.Sprintf("%s:%s@tcp(%s:%d)/%s?charset=utf8mb4&parseTime=True&loc=Local", cfg.Username, cfg.Password, cfg.Host, cfg.Port, cfg.DBName))

	if err != nil {
		return errors.Wrap(err, "open mysql failed")
	}

	mysqlDB.SetMaxIdleConns(5)
	mysqlDB.SetMaxOpenConns(50)

	// ping
	if err = mysqlDB.Ping(); err != nil {
		return errors.Wrap(err, "ping mysql failed")
	}

	log.Printf("connect mysql successfully, host:%s, port:%d\n", cfg.Host, cfg.Port)

	return nil
}

func GetMySQLConn() *sql.DB {
	return mysqlDB
}

func CloseMySQLConn() error {
	if mysqlDB == nil {
		return nil
	}

	return mysqlDB.Close()
}