package pushmod

import (
	"fmt"
	"math"
	"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/bson/primitive"
	"go.mongodb.org/mongo-driver/mongo"
	"go.mongodb.org/mongo-driver/mongo/options"
)

// initIndex 初始化索引
func initIndex() {
	many := []mongo.IndexModel{
		{
			Keys: bson.D{{Key: "createdAt", Value: 1}},
		},
		{
			Keys: bson.D{{Key: "type", Value: 1}},
		},
	}
	if _, err := coll(nil).CreateIndex(many); err != nil {
		panic(fmt.Sprintf("%s model set index err ==>[%+v]", table, err))
	}
}

var mdb *db.MongoDB

const table = models.PushModel

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

// InsertOne 插入一条数据
func InsertOne(doc PushModelDoc) error {
	_, err := coll(nil).InsertOne(doc)
	return err
}

// Delete 删除数据
func Delete(cond bson.M) (int64, error) {
	result, err := coll(nil).DeleteMany(cond)
	if err != nil {
		return 0, err
	}
	return result.DeletedCount, err
}

// GetTotalCnt 获取标签视频总数
func GetTotalCnt(cond bson.M) (int64, error) {
	total, err := coll(nil).Count(cond)
	if err != nil {
		log.Error(fmt.Sprintf("[METHOD-%s]==> Model %s %s fail error:%+v:", "GetTotalCnt", table, "Count", err), log.Any("cond", cond))
		return 0, err
	}
	return total, nil
}

// GetSkipSize 计算跳转
func GetSkipSize(page, size uint64, cond bson.M) (int, int, int64, error) {
	total, err := GetTotalCnt(cond)
	if err != nil {
		return 0, 0, 0, err
	}
	totalpages := uint64(math.Ceil(float64(total) / float64(size)))
	if page > totalpages {
		page = totalpages
	}
	if page < 1 {
		page = 1
	}
	return int((page - 1) * size), int(totalpages), total, nil
}

// GetPushList 条件获取推送视频列表
func GetPushList(page, size uint64, cond bson.M, sort bson.D) ([]*PushModel, int, int64, error) {
	skip, totalPages, total, err := GetSkipSize(page, size, cond)
	if err != nil {
		return nil, 0, 0, err
	}
	opts := options.FindOptions{}
	if sort != nil {
		opts.SetSort(sort)
	}
	opts.SetSkip(int64(skip)).SetLimit(int64(size))
	var back []*PushModel
	if err = coll(nil).Find(&back, cond, &opts); err != nil {
		log.Error(fmt.Sprintf("[METHOD-%s]==> Model %s %s fail error:%+v:", "GetPushList", table, "Find", err), log.Any("cond", cond))
		return nil, totalPages, total, err
	}
	return back, totalPages, total, nil
}

// IsExist 判断视频是否存在
func IsExist(id primitive.ObjectID) (bool, error) {
	return coll(nil).Exists(bson.M{"videoID": id})
}

// 获取短视频强推列表
func GetPushSpVidForRecommend(line time.Time, newsType string, page, size uint64) ([]string, time.Time, error) {
	var maxCreateLine time.Time
	cond := bson.M{"type": newsType}
	pushVidInfos, err := getPushVidForRecommend(line, cond, page, size)
	if err != nil {
		return nil, maxCreateLine, nil
	}
	vids := make([]primitive.ObjectID, 0, len(pushVidInfos))
	for _, i := range pushVidInfos {
		if i == nil {
			continue
		}
		if i.CreatedAt.After(maxCreateLine) {
			maxCreateLine = i.CreatedAt
		}
		vids = append(vids, i.VideoID)
	}
	arr := common.ObjectIDs2String(vids)
	return arr, maxCreateLine, nil
}

// getPushVidForRecommend 获取官方强推视频列表
func getPushVidForRecommend(line time.Time, cond bson.M, page, size uint64) ([]*RecoPushModel, error) {
	sort := bson.D{{Key: "createdAt", Value: 1}}
	cond["createdAt"] = bson.M{"$gt": line}
	opt := options.FindOptions{}
	opt.SetProjection(bson.M{"videoID": 1, "createdAt": 1})
	opt.SetLimit(int64(size)).SetSkip(int64((page - 1) * size)).SetSort(sort)
	var back []*RecoPushModel
	if err := coll(nil).Find(&back, cond, &opt); err != nil {
		log.Error(fmt.Sprintf("[METHOD-%s]==> Model %s %s fail error:%+v:", "getPushVidForRecommend", table, "Find", err), log.Any("cond", cond))
		return nil, err
	}
	return back, nil
}