package gourmet

import (
	"context"
	"go_dreamfactory/comm"
	"go_dreamfactory/lego/core"
	"go_dreamfactory/pb"
	"go_dreamfactory/sys/db"
	"go_dreamfactory/utils"

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

//参数校验
func (this *apiComp) GetRandUserCheck(session comm.IUserSession, req *pb.GourmetGetRandUserReq) (errdata *pb.ErrorData) {
	if req.People <= 0 {
		errdata = &pb.ErrorData{
			Code:  pb.ErrorCode_ReqParameterError,
			Title: pb.ErrorCode_ReqParameterError.ToString(),
		}
		return
	}
	return
}

/// 获取一些玩家数据
func (this *apiComp) GetRandUser(session comm.IUserSession, req *pb.GourmetGetRandUserReq) (errdata *pb.ErrorData) {
	var (
		szDbUser []*pb.DBUser
		mapUser  map[string]struct{}
	)
	mapUser = make(map[string]struct{}, 0)
	if errdata = this.GetRandUserCheck(session, req); errdata != nil {
		return // 参数校验失败直接返回
	}

	// 获取在线玩家信息
	onlineList, err := this.module.ModuleUser.UserOnlineList()
	if err != nil {
		errdata = &pb.ErrorData{
			Code:    pb.ErrorCode_DBError,
			Title:   pb.ErrorCode_DBError.ToString(),
			Message: err.Error(),
		}
		return
	}

	var szUid []string
	for _, v := range onlineList {
		if v.Uid == session.GetUserId() || v.Uid == "" { // 过滤自己信息
			continue
		}
		szUid = append(szUid, v.Uid)
	}
	// 随机在线玩家信息
	if len(szUid) > int(req.People) {
		randArr := utils.RandomNumbers(0, len(szUid), int(req.People))
		for _, v := range randArr {
			if szUid[v] != "" {
				mapUser[szUid[v]] = struct{}{}
			}
		}
	} else { // 数量不足 则有多少给多少
		for _, v := range szUid {
			mapUser[v] = struct{}{}
		}
		left := int(req.People) - len(mapUser)
		if left > 0 { // 一个人也没有 那就从db 中随机取
			tag, _, b := utils.UIdSplit(session.GetUserId())
			if b {
				if conn, err := db.ServerDBConn(tag); err == nil {
					dbModel := db.NewDBModel(comm.TableHero, conn)
					if _data, err1 := dbModel.DB.Find(core.SqlTable(comm.TableUser), bson.M{}, options.Find().SetSort(bson.M{"lv": -1}).SetLimit(int64(req.People))); err1 == nil {
						for _data.Next(context.TODO()) {
							temp := &pb.DBUser{}
							if err = _data.Decode(temp); err == nil {
								if len(mapUser)+len(szDbUser) >= int(req.People) {
									break
								}
								if _, ok := mapUser[temp.Uid]; !ok {
									szDbUser = append(szDbUser, temp)
								}
							}
						}
					}
				}
			}
		}
	}
	for k := range mapUser {
		if user, err := this.module.ModuleUser.GetUser(k); err == nil {
			szDbUser = append(szDbUser, user) // 转成user对象
		} else {
			this.module.Errorf("%v", err)
		}
	}
	session.SendMsg(string(this.module.GetType()), GourmetGetRandUserResp, &pb.GourmetGetRandUserResp{User: szDbUser})
	return
}