package app

import (
	"database/sql"

	// need this for SQL
	_ "github.com/go-sql-driver/mysql"
)

// MyDB is the MySQL handler variable
var MyDB *sql.DB

// InitDB initializes the MySQL database using DSN information from the config file
// and disables foreign key check's because we maintain referential integreity to allow
// for mass batch input.
//
func InitDB() {
	var db *sql.DB
	var err error
	if GetDBMS() != "mysql" {
		sugar.Fatalf("app.InitDB: 💣 ⛔ unknown DBMS: %s", GetDBMS())
		return
	}
	db, err = sql.Open("mysql", GetDSN())
	if err != nil {
		sugar.Fatalf("app.InitDB: 💣 ⛔ Can't log on to DBMS host: %w", err)
		return
	}
	_, err = db.Exec("set foreign_key_check=0")
	if err != nil {
		sugar.Warnf("app.InitDB: 💣⛔ can't disable foreign key check")
	}
	MyDB = db
	sugar.Debugf("app.InitDB: 👍 📤 %s", GetDBMS())
}