package relation

import (
	"context"
	"github.com/OpenIMSDK/Open-IM-Server/pkg/common/db/table/relation"
	"github.com/OpenIMSDK/Open-IM-Server/pkg/utils"
	"gorm.io/gorm"
)

type ObjectHashGorm struct {
	*MetaDB
}

func NewObjectHash(db *gorm.DB) relation.ObjectHashModelInterface {
	return &ObjectHashGorm{
		NewMetaDB(db, &relation.ObjectHashModel{}),
	}
}

func (o *ObjectHashGorm) NewTx(tx any) relation.ObjectHashModelInterface {
	return &ObjectHashGorm{
		NewMetaDB(tx.(*gorm.DB), &relation.ObjectHashModel{}),
	}
}

func (o *ObjectHashGorm) Take(ctx context.Context, hash string, engine string) (oh *relation.ObjectHashModel, err error) {
	oh = &relation.ObjectHashModel{}
	return oh, utils.Wrap1(o.DB.Where("hash = ? and engine = ?", hash, engine).Take(oh).Error)
}

func (o *ObjectHashGorm) Create(ctx context.Context, h []*relation.ObjectHashModel) (err error) {
	return utils.Wrap1(o.DB.Create(h).Error)
}

func (o *ObjectHashGorm) DeleteNoCitation(ctx context.Context, engine string, num int) (list []*relation.ObjectHashModel, err error) {
	err = o.DB.Table(relation.ObjectHashModelTableName, "as h").Select("h.*").
		Joins("LEFT JOIN "+relation.ObjectInfoModelTableName+" as i ON h.hash = i.hash").
		Where("h.engine = ? AND i.hash IS NULL", engine).
		Limit(num).
		Find(&list).Error
	return list, utils.Wrap1(err)
}