package store

import (
	"log"

	"github.com/glebarez/sqlite"
	"gorm.io/gorm"
	gormlogger "gorm.io/gorm/logger"
)

// Open 打开数据库连接并自动迁移。
// 开发默认 SQLite（dsn 支持 file:...?_journal_mode=WAL），生产可切 postgres。
func Open(driver, dsn string) (*gorm.DB, error) {
	var dialector gorm.Dialector
	switch driver {
	case "postgres":
		dialector = postgresDialector(dsn)
	default:
		dialector = sqlite.Open(dsn)
	}

	db, err := gorm.Open(dialector, &gorm.Config{
		Logger: gormlogger.Default.LogMode(gormlogger.Warn),
	})
	if err != nil {
		return nil, err
	}

	if err := db.AutoMigrate(AllModels()...); err != nil {
		return nil, err
	}
	log.Printf("store: connected driver=%s (migrated)", driver)
	return db, nil
}