package videowatchhistorymod

import (
	"context"
	"fmt"
	"hkdj-web-server/pub/common/log"
	"hkdj-web-server/pub/common/srvdef"
	"hkdj-web-server/pub/mongos"
	"time"

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

var coll *mongos.Collection

const videoWatchHistoryTTLSeconds int32 = 90 * 24 * 60 * 60

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

func initIndex(ctx context.Context) {
	indexes := []mongo.IndexModel{
		{
			Keys: bson.D{
				{Key: FN.VideoWatchHistory.UserId, Value: 1},
				{Key: FN.VideoWatchHistory.VideoId, Value: 1},
			},
			Options: options.Index().SetUnique(true),
		},
		{
			Keys: bson.D{
				{Key: FN.VideoWatchHistory.UserId, Value: 1},
				{Key: FN.VideoWatchHistory.UpdatedAt, Value: -1},
				{Key: FN.VideoWatchHistory.Id, Value: -1},
			},
		},
		{
			Keys: bson.D{
				{Key: FN.VideoWatchHistory.UpdatedAt, Value: 1},
			},
			Options: options.Index().SetExpireAfterSeconds(videoWatchHistoryTTLSeconds),
		},
	}
	if _, err := coll.CreateIndex(ctx, indexes); err != nil {
		panic(fmt.Sprintf("(videowatchhistorymod:initIndex) 创建索引失败 err:%+v:", err))
	}
}

// FindManyVideoWatchHistory 按条件查询用户视频观看历史
func FindManyVideoWatchHistory(ctx context.Context, filter bson.M, opts ...*options.FindOptions) (VideoWatchHistoryList, *srvdef.SrvErr) {
	data := make(VideoWatchHistoryList, 0)
	if err := coll.Find(ctx, &data, filter, opts...); err != nil {
		log.Warn("查询视频观看历史列表失败", log.E(err), log.Any("filter", filter))
		return nil, srvdef.New(srvdef.ErrDbQueryError, "", "")
	}
	return data, nil
}

// CountVideoWatchHistory 统计满足条件的视频观看历史数量
func CountVideoWatchHistory(ctx context.Context, filter bson.M, opts ...*options.CountOptions) (int64, *srvdef.SrvErr) {
	count, err := coll.Count(ctx, filter, opts...)
	if err != nil {
		log.Warn("统计视频观看历史数量失败", log.E(err), log.Any("filter", filter))
		return 0, srvdef.New(srvdef.ErrDbQueryError, "", "")
	}
	return count, nil
}

// SaveVideoWatchHistory 保存用户视频观看历史
func SaveVideoWatchHistory(ctx context.Context, userId int64, videoId int64) *srvdef.SrvErr {
	now := time.Now()
	filter := bson.M{
		FN.VideoWatchHistory.UserId:  userId,
		FN.VideoWatchHistory.VideoId: videoId,
	}
	update := bson.M{
		"$set": bson.M{
			FN.VideoWatchHistory.UpdatedAt: now,
		},
		"$setOnInsert": bson.M{
			FN.VideoWatchHistory.Id:        mongos.Lid.VideoWatchHistory.Get(),
			FN.VideoWatchHistory.UserId:    userId,
			FN.VideoWatchHistory.VideoId:   videoId,
			FN.VideoWatchHistory.CreatedAt: now,
		},
	}
	if _, err := coll.UpsertOne(ctx, filter, update); err != nil {
		log.Warn("保存视频观看历史失败", log.E(err), log.Any("filter", filter))
		return srvdef.New(srvdef.ErrDbUpdateError, "", "")
	}
	return nil
}

// DeleteManyVideoWatchHistory 删除满足条件的视频观看历史
func DeleteManyVideoWatchHistory(ctx context.Context, filter bson.M, opts ...*options.DeleteOptions) (int64, *srvdef.SrvErr) {
	count, err := coll.DeleteMany(ctx, filter, opts...)
	if err != nil {
		log.Warn("删除视频观看历史失败", log.E(err), log.Any("filter", filter))
		return 0, srvdef.New(srvdef.ErrDbDeleteError, "", "")
	}
	return count, nil
}