package svc

import (
	"errors"
	"fmt"
	"mongo.games.com/goserver/core/logger"
	"net/rpc"

	"github.com/globalsign/mgo"
	"github.com/globalsign/mgo/bson"

	"mongo.games.com/game/dbproxy/mongo"
	"mongo.games.com/game/model"
)

var (
	LotteryCodeDBErr = errors.New("log_lotterycode db open failed.")
)

func LotteryCodeCollection(plt string) *mongo.Collection {
	s := mongo.MgoSessionMgrSington.GetPltMgoSession(plt, model.LotteryCodeDBName)
	if s != nil {
		c, first := s.DB().C(model.LotteryCodeCollName)
		if first {
			c.EnsureIndex(mgo.Index{Key: []string{"snid", "index"}, Background: true, Sparse: true})
			c.EnsureIndex(mgo.Index{Key: []string{"cid"}, Background: true, Sparse: true})
			c.EnsureIndex(mgo.Index{Key: []string{"startts"}, Background: true, Sparse: true})
			c.EnsureIndex(mgo.Index{Key: []string{"-startts"}, Background: true, Sparse: true})
			c.EnsureIndex(mgo.Index{Key: []string{"code"}, Background: true, Sparse: true})
			c.EnsureIndex(mgo.Index{Key: []string{"index"}, Background: true, Sparse: true})
			c.EnsureIndex(mgo.Index{Key: []string{"-index"}, Background: true, Sparse: true})
		}
		return c
	}
	return nil
}

// UpsertLotteryCode 记录玩家抽奖活动开奖码
func UpsertLotteryCode(plt string, item *model.LotteryCode) (err error) {
	c := LotteryCodeCollection(plt)
	if c == nil {
		return LotteryCodeDBErr
	}
	_, err = c.Upsert(bson.M{"snid": item.SnId, "cid": item.CId, "startts": item.StartTs}, item)
	return
}

// GetLotteryCode 获取玩家抽奖活动开奖码
func GetLotteryCode(plt string, cid int64, startTs int64, code string) (*model.LotteryCode, error) {
	c := LotteryCodeCollection(plt)
	if c == nil {
		return nil, LotteryCodeDBErr
	}
	var ret model.LotteryCode
	err := c.Find(bson.M{"code": code, "cid": cid, "startts": startTs}).One(&ret)
	if err != nil && !errors.Is(err, mgo.ErrNotFound) {
		return nil, err
	}
	return &ret, nil
}

type LotteryCodeSvc struct{}

func (svc *LotteryCodeSvc) Upsert(req *model.UpsertLotteryCodeReq, ret *bool) (err error) {
	err = UpsertLotteryCode(req.Platform, req.Item)
	*ret = err == nil
	return
}

func (svc *LotteryCodeSvc) Get(req *model.GetLotteryCodeReq, resp *model.GetLotteryCodeResp) (err error) {
	resp.Item, err = GetLotteryCode(req.Platform, req.CId, req.StartTs, req.Code)
	return
}

func (svc *LotteryCodeSvc) GetJoinNum(req *model.GetLotteryCodeReq, resp *int) (err error) {
	c := LotteryCodeCollection(req.Platform)
	if c == nil {
		return LotteryCodeDBErr
	}
	type m struct {
		Count int64 `bson:"count"`
	}
	tc := new(m)
	err = c.Pipe([]bson.M{
		{"$match": bson.M{"snid": bson.M{"$gt": 0}, "cid": req.CId, "startts": req.StartTs}},
		{"$group": bson.M{"_id": bson.M{"snid": "$snid"}}},
		{"$count": "count"},
	}).AllowDiskUse().One(tc)
	if err != nil && !errors.Is(err, mgo.ErrNotFound) {
		logger.Logger.Warn("GetJoinNum error:", err)
		return
	}
	*resp = int(tc.Count)
	return nil
}

func (svc *LotteryCodeSvc) GetRandom(req *model.GetLotteryCodeRandomReq, ret *model.GetLotteryCodeResp) error {
	c := LotteryCodeCollection(req.Platform)
	if c == nil {
		return LotteryCodeDBErr
	}
	where := bson.M{"cid": req.CId, "startts": req.StartTs}
	switch req.Tp {
	case 1:
		where["snid"] = 0
		where["index"] = req.Index
	case 2:
		where["code"] = fmt.Sprintf("%v", req.Index)
	case 3:
		where["snid"] = bson.M{"$gt": 0}
		where["index"] = req.Index
	}
	if err := c.Find(where).One(&ret.Item); err != nil && !errors.Is(err, mgo.ErrNotFound) {
		return err
	}
	return nil
}

func init() {
	rpc.Register(new(LotteryCodeSvc))
}