// 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/mongo"
	"go.mongodb.org/mongo-driver/mongo/options"

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

func NewSystemConfig(db *mongo.Database) (chat.SystemConfigInterface, error) {
	coll := db.Collection("system_configs")
	_, err := coll.Indexes().CreateMany(context.Background(), []mongo.IndexModel{
		{
			Keys: bson.D{
				{Key: "key", Value: 1},
			},
			Options: options.Index().SetUnique(true),
		},
		{
			Keys: bson.D{
				{Key: "enabled", Value: 1},
			},
		},
	})
	if err != nil {
		return nil, errs.Wrap(err)
	}
	return &SystemConfig{coll: coll}, nil
}

type SystemConfig struct {
	coll *mongo.Collection
}

func (o *SystemConfig) Create(ctx context.Context, configs ...*chat.SystemConfig) error {
	for _, config := range configs {
		if config.CreateTime.IsZero() {
			config.CreateTime = time.Now()
		}
		if config.UpdateTime.IsZero() {
			config.UpdateTime = time.Now()
		}
	}
	return mongoutil.InsertMany(ctx, o.coll, configs)
}

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

func (o *SystemConfig) FindByKeys(ctx context.Context, keys []string) ([]*chat.SystemConfig, error) {
	if len(keys) == 0 {
		return []*chat.SystemConfig{}, nil
	}
	return mongoutil.Find[*chat.SystemConfig](ctx, o.coll, bson.M{"key": bson.M{"$in": keys}}, options.Find().SetSort(bson.D{{Key: "key", Value: 1}}))
}

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

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

func (o *SystemConfig) UpdateValue(ctx context.Context, key string, value string) error {
	return o.Update(ctx, key, map[string]any{"value": value})
}

func (o *SystemConfig) UpdateEnabled(ctx context.Context, key string, enabled bool) error {
	return o.Update(ctx, key, map[string]any{"enabled": enabled})
}

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

func (o *SystemConfig) GetEnabledConfigs(ctx context.Context) ([]*chat.SystemConfig, error) {
	filter := bson.M{
		"enabled": true,
	}
	return mongoutil.Find[*chat.SystemConfig](ctx, o.coll, filter, options.Find().SetSort(bson.D{{Key: "key", Value: 1}}))
}

func (o *SystemConfig) GetAppConfigs(ctx context.Context) ([]*chat.SystemConfig, error) {
	filter := bson.M{
		"show_in_app": true,
		"enabled":     true, // 同时要求 enabled=true
	}
	return mongoutil.Find[*chat.SystemConfig](ctx, o.coll, filter, options.Find().SetSort(bson.D{{Key: "key", Value: 1}}))
}