// Copyright © 2023 OpenIM open source community. 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 chat

import (
	"context"
	"time"

	"github.com/openimsdk/tools/db/mongoutil"
	"github.com/openimsdk/tools/db/pagination"
	"github.com/openimsdk/tools/errs"
	"go.mongodb.org/mongo-driver/bson"
	"go.mongodb.org/mongo-driver/bson/primitive"
	"go.mongodb.org/mongo-driver/mongo"
	"go.mongodb.org/mongo-driver/mongo/options"

	"git.imall.cloud/openim/chat/pkg/common/db/table/chat"
)

func NewFavorite(db *mongo.Database) (chat.FavoriteInterface, error) {
	coll := db.Collection("favorite")
	_, err := coll.Indexes().CreateMany(context.Background(), []mongo.IndexModel{
		{
			Keys: bson.D{
				{Key: "user_id", Value: 1},
				{Key: "create_time", Value: -1},
			},
		},
		{
			Keys: bson.D{
				{Key: "user_id", Value: 1},
				{Key: "type", Value: 1},
				{Key: "create_time", Value: -1},
			},
		},
		{
			Keys: bson.D{
				{Key: "user_id", Value: 1},
				{Key: "status", Value: 1},
			},
		},
	})
	if err != nil {
		return nil, errs.Wrap(err)
	}
	return &Favorite{coll: coll}, nil
}

type Favorite struct {
	coll *mongo.Collection
}

func (o *Favorite) Create(ctx context.Context, favorites ...*chat.Favorite) error {
	for _, favorite := range favorites {
		if favorite.ID == "" {
			favorite.ID = primitive.NewObjectID().Hex()
		}
		if favorite.CreateTime.IsZero() {
			favorite.CreateTime = time.Now()
		}
		if favorite.UpdateTime.IsZero() {
			favorite.UpdateTime = time.Now()
		}
		if favorite.Status == 0 {
			favorite.Status = 1 // 默认为正常状态
		}
	}
	return mongoutil.InsertMany(ctx, o.coll, favorites)
}

func (o *Favorite) Take(ctx context.Context, favoriteID string) (*chat.Favorite, error) {
	return mongoutil.FindOne[*chat.Favorite](ctx, o.coll, bson.M{"_id": favoriteID, "status": 1})
}

func (o *Favorite) FindByUserID(ctx context.Context, userID string, pagination pagination.Pagination) (int64, []*chat.Favorite, error) {
	filter := bson.M{
		"user_id": userID,
		"status":  1,
	}
	return mongoutil.FindPage[*chat.Favorite](ctx, o.coll, filter, pagination, options.Find().SetSort(bson.D{{Key: "create_time", Value: -1}}))
}

func (o *Favorite) FindByUserIDAndType(ctx context.Context, userID string, favoriteType int32, pagination pagination.Pagination) (int64, []*chat.Favorite, error) {
	filter := bson.M{
		"user_id": userID,
		"type":    favoriteType,
		"status":  1,
	}
	return mongoutil.FindPage[*chat.Favorite](ctx, o.coll, filter, pagination, options.Find().SetSort(bson.D{{Key: "create_time", Value: -1}}))
}

func (o *Favorite) SearchByKeyword(ctx context.Context, userID string, keyword string, pagination pagination.Pagination) (int64, []*chat.Favorite, error) {
	filter := bson.M{
		"user_id": userID,
		"status":  1,
		"$or": []bson.M{
			{"title": bson.M{"$regex": keyword, "$options": "i"}},
			{"content": bson.M{"$regex": keyword, "$options": "i"}},
			{"description": bson.M{"$regex": keyword, "$options": "i"}},
		},
	}
	return mongoutil.FindPage[*chat.Favorite](ctx, o.coll, filter, pagination, options.Find().SetSort(bson.D{{Key: "create_time", Value: -1}}))
}

func (o *Favorite) Update(ctx context.Context, favoriteID string, data map[string]any) error {
	if len(data) == 0 {
		return nil
	}
	data["update_time"] = time.Now()
	return mongoutil.UpdateOne(ctx, o.coll, bson.M{"_id": favoriteID}, bson.M{"$set": data}, false)
}

func (o *Favorite) Delete(ctx context.Context, favoriteIDs []string) error {
	if len(favoriteIDs) == 0 {
		return nil
	}
	// 软删除：将状态设置为0
	_, err := o.coll.UpdateMany(ctx, bson.M{"_id": bson.M{"$in": favoriteIDs}}, bson.M{"$set": bson.M{"status": 0, "update_time": time.Now()}})
	return errs.Wrap(err)
}

func (o *Favorite) DeleteByUserID(ctx context.Context, userID string) error {
	// 软删除：将状态设置为0
	_, err := o.coll.UpdateMany(ctx, bson.M{"user_id": userID}, bson.M{"$set": bson.M{"status": 0, "update_time": time.Now()}})
	return errs.Wrap(err)
}

func (o *Favorite) CountByUserID(ctx context.Context, userID string) (int64, error) {
	return mongoutil.Count(ctx, o.coll, bson.M{"user_id": userID, "status": 1})
}

func (o *Favorite) FindByTags(ctx context.Context, userID string, tags []string, pagination pagination.Pagination) (int64, []*chat.Favorite, error) {
	filter := bson.M{
		"user_id": userID,
		"status":  1,
		"tags":    bson.M{"$in": tags},
	}
	return mongoutil.FindPage[*chat.Favorite](ctx, o.coll, filter, pagination, options.Find().SetSort(bson.D{{Key: "create_time", Value: -1}}))
}