package database

import (
	"log"
	"time"

	"gorm.io/driver/mysql"
	"gorm.io/gorm"
	"gorm.io/gorm/logger"
)

// Open initialises a GORM DB connection and runs AutoMigrate for all models.
func Open(dsn string) (*gorm.DB, error) {
	db, err := gorm.Open(mysql.Open(dsn), &gorm.Config{
		Logger: logger.Default.LogMode(logger.Warn),
	})
	if err != nil {
		return nil, err
	}

	sqlDB, err := db.DB()
	if err != nil {
		return nil, err
	}
	sqlDB.SetMaxIdleConns(5)
	sqlDB.SetMaxOpenConns(20)
	sqlDB.SetConnMaxLifetime(time.Hour)

	if err := autoMigrate(db); err != nil {
		return nil, err
	}
	log.Println("[DB] 数据库连接成功，表结构已同步")
	return db, nil
}

func autoMigrate(db *gorm.DB) error {
	return db.AutoMigrate(
		&ProductRow{},
		&ProductCodeRow{},
		&OrderRow{},
		&SiteSettingRow{},
		&WishlistRow{},
		&ChatMessageRow{},
	)
}