// Copyright © 2023 OpenIM. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package relation

import (
	"context"

	"gorm.io/gorm"

	"github.com/OpenIMSDK/Open-IM-Server/pkg/common/db/table/relation"
	"github.com/OpenIMSDK/tools/utils"
)

type FriendRequestGorm struct {
	*MetaDB
}

func NewFriendRequestGorm(db *gorm.DB) relation.FriendRequestModelInterface {
	return &FriendRequestGorm{NewMetaDB(db, &relation.FriendRequestModel{})}
}

func (f *FriendRequestGorm) NewTx(tx any) relation.FriendRequestModelInterface {
	return &FriendRequestGorm{NewMetaDB(tx.(*gorm.DB), &relation.FriendRequestModel{})}
}

// 插入多条记录.
func (f *FriendRequestGorm) Create(ctx context.Context, friendRequests []*relation.FriendRequestModel) (err error) {
	return utils.Wrap(f.db(ctx).Create(&friendRequests).Error, "")
}

// 删除记录.
func (f *FriendRequestGorm) Delete(ctx context.Context, fromUserID, toUserID string) (err error) {
	return utils.Wrap(
		f.db(ctx).
			Where("from_user_id = ? AND to_user_id = ?", fromUserID, toUserID).
			Delete(&relation.FriendRequestModel{}).
			Error,
		"",
	)
}

// 更新零值.
func (f *FriendRequestGorm) UpdateByMap(
	ctx context.Context,
	fromUserID string,
	toUserID string,
	args map[string]interface{},
) (err error) {
	return utils.Wrap(
		f.db(ctx).
			Model(&relation.FriendRequestModel{}).
			Where("from_user_id = ? AND to_user_id =?", fromUserID, toUserID).
			Updates(args).
			Error,
		"",
	)
}

// 更新记录 （非零值）.
func (f *FriendRequestGorm) Update(ctx context.Context, friendRequest *relation.FriendRequestModel) (err error) {
	return utils.Wrap(
		f.db(ctx).
			Where("from_user_id = ? AND to_user_id =?", friendRequest.FromUserID, friendRequest.ToUserID).
			Updates(friendRequest).
			Error,
		"",
	)
}

// 获取来指定用户的好友申请  未找到 不返回错误.
func (f *FriendRequestGorm) Find(
	ctx context.Context,
	fromUserID, toUserID string,
) (friendRequest *relation.FriendRequestModel, err error) {
	friendRequest = &relation.FriendRequestModel{}
	err = utils.Wrap(
		f.db(ctx).Where("from_user_id = ? and to_user_id = ?", fromUserID, toUserID).Find(friendRequest).Error,
		"",
	)
	return friendRequest, err
}

func (f *FriendRequestGorm) Take(
	ctx context.Context,
	fromUserID, toUserID string,
) (friendRequest *relation.FriendRequestModel, err error) {
	friendRequest = &relation.FriendRequestModel{}
	err = utils.Wrap(
		f.db(ctx).Where("from_user_id = ? and to_user_id = ?", fromUserID, toUserID).Take(friendRequest).Error,
		"",
	)
	return friendRequest, err
}

// 获取toUserID收到的好友申请列表.
func (f *FriendRequestGorm) FindToUserID(
	ctx context.Context,
	toUserID string,
	pageNumber, showNumber int32,
) (friendRequests []*relation.FriendRequestModel, total int64, err error) {
	err = f.db(ctx).Model(&relation.FriendRequestModel{}).Where("to_user_id = ? ", toUserID).Count(&total).Error
	if err != nil {
		return nil, 0, utils.Wrap(err, "")
	}
	err = utils.Wrap(
		f.db(ctx).
			Where("to_user_id = ? ", toUserID).
			Limit(int(showNumber)).
			Offset(int(pageNumber-1)*int(showNumber)).
			Find(&friendRequests).
			Error,
		"",
	)
	return
}

// 获取fromUserID发出去的好友申请列表.
func (f *FriendRequestGorm) FindFromUserID(
	ctx context.Context,
	fromUserID string,
	pageNumber, showNumber int32,
) (friendRequests []*relation.FriendRequestModel, total int64, err error) {
	err = f.db(ctx).Model(&relation.FriendRequestModel{}).Where("from_user_id = ? ", fromUserID).Count(&total).Error
	if err != nil {
		return nil, 0, utils.Wrap(err, "")
	}
	err = utils.Wrap(
		f.db(ctx).
			Where("from_user_id = ? ", fromUserID).
			Limit(int(showNumber)).
			Offset(int(pageNumber-1)*int(showNumber)).
			Find(&friendRequests).
			Error,
		"",
	)
	return
}

func (f *FriendRequestGorm) FindBothFriendRequests(ctx context.Context, fromUserID, toUserID string) (friends []*relation.FriendRequestModel, err error) {
	err = utils.Wrap(
		f.db(ctx).
			Where("(from_user_id = ? AND to_user_id = ?) OR (from_user_id = ? AND to_user_id = ?)", fromUserID, toUserID, toUserID, fromUserID).
			Find(&friends).
			Error,
		"",
	)
	return
}