package kwstatmod

import (
	"fmt"
	"time"

	"91porn-server/common/constant"
	"91porn-server/common/db"
	"91porn-server/common/log"
	"91porn-server/common/timeutil/timerange"
	"91porn-server/models"

	"github.com/jinzhu/now"
	"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.KeywordStat

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: "realm", Value: 1}, {Key: "word", Value: 1}},
		},
		{
			Keys: bson.D{{Key: "sumDate", Value: -1}, {Key: "realm", Value: 1}},
		},
		{
			Keys:    bson.D{{Key: "sumDate", Value: -1}, {Key: "realm", Value: 1}, {Key: "word", Value: 1}},
			Options: options.Index().SetUnique(true),
		},
		{
			Keys: bson.D{{Key: "count", Value: -1}},
		},
		{
			Keys: bson.D{{Key: "createdAt", Value: -1}},
		},
		{
			Keys: bson.D{{Key: "updatedAt", 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, position time.Time, recordTime time.Time, docList []KeywordIncDoc) error {
	sumDate := timerange.LocDayRange(position).Head
	// create the slice of write models
	writes := make([]mongo.WriteModel, len(docList))
	for i, doc := range docList {
		filter := M{
			"sumDate": sumDate,
			"realm":   doc.Realm,
			"word":    doc.Word,
		}
		update := M{
			"$setOnInsert": M{
				"sumDate":   sumDate,
				"realm":     doc.Realm,
				"word":      doc.Word,
				"createdAt": time.Now(),
			},
			"$set": M{
				"recordAt":  recordTime,
				"updatedAt": time.Now(),
			},
			"$inc": M{
				"count": doc.Count,
			},
		}
		writes[i] = mongo.NewUpdateOneModel().
			SetFilter(filter).
			SetUpdate(update).
			SetUpsert(true)
		log.Debug(fmt.Sprintf("sumDate:%s table:%s [ realm:%+v word:%+v filter:%+v update:%+v ]\n", sumDate, table, doc.Realm, doc.Word, 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
}

func list(sumDate time.Time, realms []constant.RealmType, enable bool, sort bson.D, skip, limit int64) ([]Keyword, error) {
	filter := M{
		"sumDate": sumDate,
		"realm":   M{"$in": realms},
	}
	realmCount := len(realms)
	if realmCount == 0 {
		return []Keyword{}, nil
	}
	if realmCount == 1 { //只有一个元素 不使用$in 提升效率
		filter["realm"] = realms[0]
	}
	opt := (&options.FindOptions{}).
		SetSort(sort).
		SetSkip(skip).
		SetLimit(limit)
	keywords := make([]Keyword, 0, limit)
	if err := coll(nil).Find(&keywords, filter, opt); err != nil {
		log.ZapLog.Error(fmt.Sprintf("coll:%s list fail error:%+v:", table, err))
		return nil, err
	}
	return keywords, nil
}

// RealmRanking RealmRanking
func RealmRanking(sumDate time.Time, realm constant.RealmType, skip int64, limit int64) ([]Keyword, error) {
	sort := bson.D{
		{Key: "sortKey", Value: -1},
		{Key: "count", Value: -1},
	}
	keywords, err := list(sumDate, []constant.RealmType{realm}, true, sort, skip, limit)
	if err != nil {
		log.ZapLog.Error(fmt.Sprintf("coll:%s RealmRanking fail error:%+v:", table, err))
		return nil, err
	}
	return keywords, nil
}

// KeywordCountMapBySumDate
func KeywordCountMapBySumDate(sumDate time.Time) (map[string]int64, error) {
	pipeline := []M{
		{
			"$match": M{
				"sumDate": sumDate,
			},
		},
		{
			"$group": M{
				"_id":   "$word",
				"count": M{"$sum": "$count"},
			},
		},
		{
			"$sort": M{
				"count": -1,
			},
		},
	}
	var list []struct {
		Word  string `bson:"_id"`
		Count int64  `bson:"count"`
	}
	if err := coll(nil).Aggregate(&list, pipeline); err != nil {
		return nil, err
	}
	m := make(map[string]int64, len(list))
	for _, v := range list {
		m[v.Word] = v.Count
	}
	return m, nil
}

// HotSearchWordsToday 获取今日搜索较高的关键词 视频关键字
func HotSearchWordsToday(top int) ([]string, error) {
	var kw []Keyword
	var words []string
	opts := options.FindOptions{}
	sort := bson.D{{Key: "count", Value: -1}}
	opts.SetSort(sort).SetLimit(int64(top))
	if err := coll(nil).Find(&kw, M{"realm": "video", "sumDate": now.BeginningOfDay()}, &opts); err != nil {
		log.Error("keywordStat model HotSearchWordsToday error", log.E(err), log.Any("top", top))
		return words, err
	}
	words = make([]string, len(kw))
	for i, k := range kw {
		words[i] = k.Word
	}
	return words, nil
}

func GetKeywordsExcludeWords(sumDate time.Time, realm string, words []string, skip int64, limit int64) (data []Keyword, err error) {
	if words == nil {
		words = []string{}
	}
	query := bson.M{"word": bson.M{"$nin": words}}
	opts := options.Find()
	sort := bson.D{
		{Key: "sortKey", Value: -1},
		{Key: "count", Value: -1},
	}
	opts.SetSort(sort).SetSkip(skip).SetLimit(limit)
	if err = coll(nil).Find(&data, query, opts); err != nil {
		log.Error("keywordStat model GetKeywordsExcludeWords error", log.E(err), log.Any("sumDate", sumDate), log.Any("words", words))
		return
	}
	return
}

// 根据时间获取今日加昨日的关键字
func GetKeywordsBySumDate(sumDate time.Time, realm string, skip int64, limit int64) (data []Keyword, err error) {
	var query = bson.M{"sumDate": bson.M{"$gte": sumDate}, "realm": realm}
	var opts = options.Find()
	opts.SetSort(bson.D{{Key: "sortKey", Value: -1}, {Key: "count", Value: -1}}).SetSkip(skip).SetLimit(limit)
	if err = coll(nil).Find(&data, query, opts); err != nil {
		log.Error("keywordStat model GetKeywordsBySumDate error", log.E(err), log.Any("sumDate", sumDate), log.Any("realm", realm))
		return
	}
	return
}

// 根据时间段获取关键字
func GetKeywordsByTimeRange(start time.Time, end time.Time) (data []Keyword, err error) {
	var query = bson.M{"updatedAt": bson.M{"$gte": start, "$lt": end}}
	if err = coll(nil).Find(&data, query); err != nil {
		log.Error("keywordStat model GetKeywordsByTimeRange error", log.E(err))
		return
	}
	return
}

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