// 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 NewScheduledTask(db *mongo.Database) (chat.ScheduledTaskInterface, error) {
	coll := db.Collection("scheduled_tasks")
	_, 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: "status", Value: 1},
			},
		},
	})
	if err != nil {
		return nil, errs.Wrap(err)
	}
	return &ScheduledTask{coll: coll}, nil
}

type ScheduledTask struct {
	coll *mongo.Collection
}

func (o *ScheduledTask) Create(ctx context.Context, tasks ...*chat.ScheduledTask) error {
	for _, task := range tasks {
		if task.ID == "" {
			task.ID = primitive.NewObjectID().Hex()
		}
		if task.CreateTime.IsZero() {
			task.CreateTime = time.Now()
		}
		if task.UpdateTime.IsZero() {
			task.UpdateTime = time.Now()
		}
		if task.Status == 0 {
			task.Status = 1 // 默认为启用状态
		}
	}
	return mongoutil.InsertMany(ctx, o.coll, tasks)
}

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

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

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

func (o *ScheduledTask) Update(ctx context.Context, taskID 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": taskID}, bson.M{"$set": data}, false)
}

func (o *ScheduledTask) Delete(ctx context.Context, taskIDs []string) error {
	if len(taskIDs) == 0 {
		return nil
	}
	_, err := o.coll.DeleteMany(ctx, bson.M{"_id": bson.M{"$in": taskIDs}})
	return errs.Wrap(err)
}