package statvidmod

import (
	"fmt"
	"time"

	"91porn-server/common"
	"91porn-server/common/db"
	"91porn-server/common/log"
	"91porn-server/models"

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

var mdb *db.MongoDB

const table = models.VideoStat

func coll(t *db.MongoTool) *db.MongoTool {
	if t == nil {
		return mdb.Coll(table)
	}
	return t.Coll(table)
}

// initIndex 初始化索引
func initIndex() {
	many := []mongo.IndexModel{
		{
			Keys: bson.D{{Key: "vid", Value: 1}},
		},
		{
			Keys:    bson.D{{Key: "sumDate", Value: -1}, {Key: "vid", Value: 1}},
			Options: options.Index().SetUnique(true),
		},
		{
			Keys:    bson.D{{Key: "playCount", Value: -1}},
			Options: options.Index().SetSparse(true),
		},
		{
			Keys: bson.D{{Key: "createdAt", Value: -1}},
		},
		{
			Keys: bson.D{{Key: "updatedAt", Value: -1}},
		},
		{
			Keys: bson.D{{Key: "recordAt", Value: -1}},
		},
		{
			Keys: bson.D{{Key: "sumDate", Value: -1}, {Key: "playCount", Value: -1}},
		},
	}
	if _, err := coll(nil).CreateIndex(many); err != nil {
		panic(fmt.Sprintf("%s model set index err ==>[%+v]", table, err))
	}
}

func ChangeStatTrans(trans *db.MongoTool, sumDate time.Time, recordTime time.Time, statDocMap VideoStatDocMap) error {
	writes := make([]mongo.WriteModel, len(statDocMap))
	i := 0
	for vid, statDoc := range statDocMap {
		filter := M{
			"sumDate": sumDate,
			"vid":     vid,
		}
		setM, err := common.ToBsonM(statDoc.VideoStatSetDoc)
		if err != nil {
			return err
		}
		setM["recordAt"] = recordTime
		setM["updatedAt"] = time.Now()
		incM, err := common.ToBsonM(statDoc.VideoStatIncDoc)
		if err != nil {
			return err
		}
		update := M{
			"$setOnInsert": M{
				"sumDate":   sumDate,
				"vid":       vid,
				"createdAt": time.Now(),
			},
		}
		if len(incM) != 0 {
			update["$inc"] = incM
		}
		if len(setM) != 0 {
			update["$set"] = setM
		}
		writes[i] = mongo.NewUpdateOneModel().
			SetFilter(filter).
			SetUpdate(update).
			SetUpsert(true)
		i++
		log.Debug(fmt.Sprintf("sumDate:%s table:%s [ vid:%+v filter:%+v update:%+v ]\n", sumDate, table, vid, filter, update))
	}
	if len(writes) == 0 {
		return nil
	}
	//bulkWrite 不是原子操作 不具备事务性
	opt := (&options.BulkWriteOptions{}).SetOrdered(false) //设为无序,触发并行写,提升写效率
	_, err := coll(trans).Bulk(writes, opt)
	return err
}

// GetDailyPlayCountGroup
// @return  vid List, vid->dailyPlayCount Map, error
func GetDailyPlayCountGroup(skip, limit int64) ([]ObjectID, map[ObjectID]int64, error) {
	playCountMin := int64(0)
	playCountGTMatch := PlayCountGTMatch{&playCountMin}
	sort := D{{Key: "sumDate", Value: -1}, {Key: "playCount", Value: -1}}
	list, err := List(sort, skip, limit, playCountGTMatch.New())
	if err != nil {
		return nil, nil, err
	}
	listLen := len(list)
	vidList := make([]ObjectID, listLen)
	countMap := make(map[ObjectID]int64, listLen)
	for i, v := range list {
		vidList[i] = v.Vid
		countMap[v.Vid] = v.PlayCount
	}
	return vidList, countMap, nil
}

func SumByRecordAt(match RecordAtGTEAndLTMatch) ([]SumGroup, error) {
	return Sum(match.New())
}

func DeleteBeforeCreatedAt(t *db.MongoTool, tm time.Time) error {
	_, err := coll(t).DeleteMany(bson.M{"createdAt": bson.M{"$lt": tm}})
	return err
}