package videolikemod

import (
	"context"
	"fmt"
	"time"
	"videoweb/pub/common/log"
	"videoweb/pub/common/srvdef"
	"videoweb/pub/mongos"

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

var coll *mongos.Collection

// Init 初始化 video_like 集合和常用查询索引
func Init(ctx context.Context) {
	coll = mongos.Shop.Coll(TN.VideoLike)
	initIndex(ctx)
}

func initIndex(ctx context.Context) {
	indexes := []mongo.IndexModel{
		{Keys: bson.D{{Key: FN.VideoLike.UserID, Value: 1}, {Key: FN.VideoLike.VideoID, Value: 1}}, Options: options.Index().SetUnique(true)},
		{Keys: bson.D{{Key: FN.VideoLike.VideoID, Value: 1}}},
		{Keys: bson.D{{Key: FN.VideoLike.CreatedAt, Value: -1}, {Key: FN.VideoLike.VideoID, Value: 1}}},
		{Keys: bson.D{{Key: FN.VideoLike.UserID, Value: 1}, {Key: FN.VideoLike.CreatedAt, Value: -1}, {Key: FN.VideoLike.Id, Value: -1}}},
	}
	if _, err := coll.CreateIndex(ctx, indexes); err != nil {
		panic(fmt.Sprintf("(videolikemod:initIndex) Create Index failed! err:%+v:", err))
	}
}

// UpsertOneVideoLike 按用户ID和视频ID写入点赞关系，返回是否新增点赞
func UpsertOneVideoLike(ctx context.Context, userId, videoId int64, now time.Time) (bool, *srvdef.SrvErr) {
	filter := bson.M{FN.VideoLike.UserID: userId, FN.VideoLike.VideoID: videoId}
	update := bson.M{
		"$set": bson.M{FN.VideoLike.UpdatedAt: now},
		"$setOnInsert": bson.M{
			FN.VideoLike.Id:        mongos.Lid.VideoLike.Get(),
			FN.VideoLike.UserID:    userId,
			FN.VideoLike.VideoID:   videoId,
			FN.VideoLike.CreatedAt: now,
		},
	}
	result, err := coll.UpdateOne(ctx, filter, update, options.Update().SetUpsert(true))
	if err != nil {
		log.Warn("videolikemod:UpsertOneVideoLike db.UpdateOne failed", log.Any("filter", filter), log.E(err))
		return false, srvdef.New(srvdef.ErrDbUpdateError, "", "")
	}
	return result.UpsertedCount > 0, nil
}

// DeleteOneVideoLike 删除一条视频点赞关系，返回是否实际删除
func DeleteOneVideoLike(ctx context.Context, filter bson.M) (bool, *srvdef.SrvErr) {
	result, err := coll.DeleteOne(ctx, filter)
	if err != nil {
		log.Warn("videolikemod:DeleteOneVideoLike db.DeleteOne failed", log.Any("filter", filter), log.E(err))
		return false, srvdef.New(srvdef.ErrDbDeleteError, "", "")
	}
	return result > 0, nil
}

// CountVideoLike 统计视频点赞关系数量
func CountVideoLike(ctx context.Context, filter bson.M) (int64, *srvdef.SrvErr) {
	count, err := coll.Count(ctx, filter)
	if err != nil {
		log.Warn("videolikemod:CountVideoLike db.Count failed", log.Any("filter", filter), log.E(err))
		return 0, srvdef.New(srvdef.ErrDbQueryError, "", "")
	}
	return count, nil
}

// AggregateVideoLike 聚合查询视频点赞关系
func AggregateVideoLike(ctx context.Context, bind interface{}, pipeline []bson.M) *srvdef.SrvErr {
	if err := coll.Aggregate(ctx, bind, pipeline); err != nil {
		log.Warn("videolikemod:AggregateVideoLike db.Aggregate failed", log.Any("pipeline", pipeline), log.E(err))
		return srvdef.New(srvdef.ErrDbQueryError, "", "")
	}
	return nil
}