package orm

import (
	"fmt"
	"log/slog"
	"platform/pkg/env"
	"platform/web/queries"

	"gorm.io/driver/postgres"
	"gorm.io/gen"
	"gorm.io/gen/field"
	"gorm.io/gorm"
	"gorm.io/gorm/schema"
)

var DB *gorm.DB

func Init() {

	// 连接数据库
	dsn := fmt.Sprintf(
		"host=%s user=%s password=%s dbname=%s port=%s sslmode=disable TimeZone=Asia/Shanghai",
		env.DbHost, env.DbUserName, env.DbPassword, env.DbName, env.DbPort,
	)
	db, err := gorm.Open(postgres.Open(dsn), &gorm.Config{
		NamingStrategy: schema.NamingStrategy{
			SingularTable: true,
		},
	})
	if err != nil {
		slog.Error("gorm 初始化数据库失败：", slog.Any("err", err))
		panic(err)
	}

	// 连接池
	conn, err := db.DB()
	if err != nil {
		slog.Error("gorm 初始化数据库失败：", slog.Any("err", err))
		panic(err)
	}
	conn.SetMaxIdleConns(10)
	conn.SetMaxOpenConns(100)

	// 初始化查询工具
	queries.SetDefault(db)

	DB = db
}

func Exit() error {
	if DB != nil {
		conn, err := DB.DB()
		if err != nil {
			return err
		}
		return conn.Close()
	}
	return nil
}

type WithAlias interface {
	Alias() string
}

func Alias(model WithAlias) func(db gen.Dao) gen.Dao {
	return func(db gen.Dao) gen.Dao {
		return db.Unscoped().Where(field.NewBool(model.Alias(), "deleted_at").IsNull())
	}
}