package models

import (
	"go_blog/config"
	"go_blog/pkg/util"
	"log/slog"
	"os"
	"time"

	"gorm.io/driver/mysql"
	"gorm.io/driver/postgres"
	"gorm.io/driver/sqlite"
	"gorm.io/gorm"
	"gorm.io/gorm/schema"
)

var DB *gorm.DB

func InitDatabase(conf *config.Config) {
	var dialector gorm.Dialector
	switch conf.DataBase.Driver {
	case "mysql":
		dialector = mysql.Open(conf.DataBase.DSN)
	case "postgres":
		dialector = postgres.Open(conf.DataBase.DSN)
	case "sqlite":
		dialector = sqlite.Open(conf.DataBase.DSN)
	default:
		slog.Error("不支持的数据库驱动", "driver", conf.DataBase.Driver)
		os.Exit(1)
	}

	db, err := gorm.Open(dialector, &gorm.Config{
		NamingStrategy: schema.NamingStrategy{
			TablePrefix: conf.DataBase.Prefix,
		},
	})

	if err != nil {
		slog.Error("数据库连接失败", "error", err)
		os.Exit(1)
	} else {
		slog.Info("数据库连接成功", "driver", conf.DataBase.Driver, "DSN", conf.DataBase.DSN)
	}

	DB = db
	// 自动迁移数据模型
	db.AutoMigrate(&Account{}, &Content{}, &Option{})
}

type BaseModel struct {
	ID        uint64     `gorm:"primary_key'" json:"id"`
	CreatedAt time.Time  `json:"-"`
	UpdatedAt time.Time  `json:"-"`
	DeletedAt *time.Time `sql:"index" json:"-"`
}

// 生成全局唯一ID
func (m *BaseModel) BeforeCreate(scope *gorm.DB) error {
	if m.ID == 0 {
		m.ID = util.GenSonyFlakeId()
	}
	return nil
}