package kwrankmod

import (
	"fmt"
	"math/rand"
	"time"

	"91porn-server/common"
	"91porn-server/common/db"
	"91porn-server/common/log"
	"91porn-server/common/timeutil/timerange"
	"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.KWRankStat

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

// InitIndex 设置index
func initIndex() {
	many := []mongo.IndexModel{
		{
			Keys: bson.D{{Key: "word", Value: 1}},
		},
		{
			Keys: bson.D{{Key: "sumDate", Value: -1}},
		},
		{
			Keys:    bson.D{{Key: "sumDate", Value: -1}, {Key: "word", Value: 1}},
			Options: options.Index().SetUnique(true),
		},
		{
			Keys: bson.D{{Key: "count", Value: -1}},
		},
		{
			Keys: bson.D{{Key: "sortKey", Value: -1}}, //大的排前面
		},
		{
			Keys: bson.D{{Key: "sumDate", Value: -1}, {Key: "sortKey", Value: -1}, {Key: "count", Value: -1}}, //大的排前面
		},
		{
			Keys: bson.D{{Key: "recordAt", Value: -1}},
		},
	}
	if _, err := coll(nil).CreateIndex(many); err != nil {
		panic(fmt.Sprintf("%s model set index err ==>[%+v]", table, err))
	}
}

func Insert(kw Word) error {
	now := time.Now()
	kw.CreatedAt = now
	kw.UpdatedAt = now
	if _, err := coll(nil).InsertOne(kw); err != nil {
		log.ZapLog.Error(fmt.Sprintf("coll:%s Insert fail error:%+v:", table, err))
		return err
	}
	return nil
}

func Update(id ObjectID, doc RankDoc) error {
	update, err := common.ToBsonM(doc)
	if err != nil {
		return fmt.Errorf("coll:%s update ToBsonM fail, error:%+v ", table, err)
	}
	update["updatedAt"] = time.Now()
	if _, err := coll(nil).UpdateOne(M{"_id": id}, M{"$set": update}); err != nil {
		log.ZapLog.Error(fmt.Sprintf("coll:%s update fail error:%+v:", table, err))
		return err
	}
	return nil
}

// DeleteOne DeleteOne
func Delete(id ObjectID) error {
	_, err := coll(nil).DeleteOne(M{"_id": id})
	if err != nil {
		log.ZapLog.Error(fmt.Sprintf("coll:%s DeleteOne fail error:%+v:", table, err))
		return err
	}
	return nil
}

var rankSort = bson.D{
	{Key: "sumDate", Value: -1},
	{Key: "sortKey", Value: -1},
	{Key: "count", Value: -1},
}

var enableIsTrue = true

// RecentRanking RecentRanking
func RecentRanking(limit int64) ([]Keyword, error) {
	kws, err := KwsList(rankSort, 0, limit, (&EnableMatch{&enableIsTrue}).New())
	if err != nil {
		log.ZapLog.Error(fmt.Sprintf("coll:%s RecentRanking fail error:%+v:", table, err))
	}
	return kws, err
}

func ChangeStatTrans(trans *db.MongoTool, position time.Time, recordTime time.Time, setList []RankSetDoc) error {
	if len(setList) == 0 {
		return nil
	}
	sumDate := timerange.LocDayRange(position).Head
	// create the slice of write models
	writes := make([]mongo.WriteModel, len(setList))
	for i, doc := range setList {
		filter := M{
			"sumDate": sumDate,
			"word":    doc.Word,
		}
		update := M{
			"$setOnInsert": M{
				"sumDate":   sumDate,
				"word":      doc.Word,
				"enable":    true, //首次插入时使能
				"createdAt": time.Now(),
			},
			"$set": M{
				"count":     doc.Count, //设计为统计表keywordStat聚合word得到
				"sortKey":   doc.Count, //控制app端排序
				"recordAt":  recordTime,
				"updatedAt": time.Now(),
			},
		}
		writes[i] = mongo.NewUpdateOneModel().
			SetFilter(filter).
			SetUpdate(update).
			SetUpsert(true)
		log.Debug(fmt.Sprintf("sumDate:%s table:%s [  word:%+v filter:%+v update:%+v ]\n", sumDate, table, doc.Word, filter, update))
	}
	//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
}

func GetListNewest(limit int64) (WordArray, error) {
	sort := bson.D{{Key: "createdAt", Value: -1}}
	enable := true
	enableMatch := EnableMatch{&enable}
	return List(sort, 0, limit, enableMatch.New())
}

func GetListRandom(limit int64) (WordArray, error) {
	enable := true
	enableMatch := EnableMatch{&enable}
	count, err := Count(enableMatch.New())
	if err != nil {
		return nil, err
	}
	maxSkip := count - limit
	if maxSkip < 0 {
		maxSkip = 0
	}
	randSkip := rand.Int63n(maxSkip)
	sort := bson.D{{Key: "count", Value: -1}}
	return List(sort, randSkip, limit)
}

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