package dbquery

import (
	"database/sql"
	"errors"
	"fmt"
	"strconv"

	"log"

	"time"

	_ "github.com/denisenkom/go-mssqldb"
)

var MSDB_CONN *sql.DB

func MSConnect(DBHOST, DBUSER, DBPWD, DBNAME, DBPORT, encrypt string, conns ...int) error {

	log.Println("msdb connectting...")

	var dbConnErr error

	if DBHOST != "" && DBUSER != "" && DBPWD != "" && DBPORT != "" { //&& DBNAME != ""

		for i := 0; i < 10; i++ {

			//连接字符串

			db_port, _ := strconv.Atoi(DBPORT)

			params := "server=%s;port=%d;database=%s;user id=%s;password=%s"
			if encrypt != "" {
				params = params + ";encrypt=" + encrypt
			}

			connString := fmt.Sprintf(params, DBHOST, db_port, DBNAME, DBUSER, DBPWD)

			log.Println(connString)

			//建立连接

			MSDB_CONN, dbConnErr = sql.Open("mssql", connString)

			if dbConnErr != nil {
				log.Println("ERROR", "can not connect to Database, ", dbConnErr)
				time.Sleep(time.Second * 5)
			} else {

				err = MSDB_CONN.Ping()

				log.Println("msdb connected", err)

				break
			}
		}

	} else {
		return errors.New("msdb connection params errors")
	}

	return dbConnErr
}

func CloseMSConn() error {
	if MSDB_CONN != nil {
		return MSDB_CONN.Close()
	}
	return nil
}