package db

import (
	"database/sql"
	"fmt"
	"log"

	_ "github.com/go-sql-driver/mysql"
)

var DB *sql.DB

func Connect(dsn string) error {
	if dsn == "" {
		return fmt.Errorf("DB_DSN is not set")
	}

	conn, err := sql.Open("mysql", dsn)
	if err != nil {
		return fmt.Errorf("open db: %w", err)
	}

	if err := conn.Ping(); err != nil {
		return fmt.Errorf("ping db: %w", err)
	}

	conn.SetMaxOpenConns(25)
	conn.SetMaxIdleConns(10)

	DB = conn
	log.Println("database connected: cpone_dashboard")
	return nil
}