package cache

import (
	"fmt"
	"go_dreamfactory/pb"
	"go_dreamfactory/sys/db"

	"go_dreamfactory/lego/sys/mgo"
	"go_dreamfactory/lego/sys/redis"
)

const ( //Redis
	Redis_PackCache string = "pack:%s"
)

const (
	GridCapMaxNum = 90 //单个格子的最大容量
)

type IPack interface {
	Pack_QueryUserPack(uId string) (pack *pb.DB_UserPackData, err error)
}

///查询用户背包数据
func (this *Cache) Pack_QueryUserPack(uId string) (pack *pb.DB_UserPackData, err error) {
	pack = &pb.DB_UserPackData{
		UserId: uId,
	}
	if err = this.redis.Get(fmt.Sprintf(Redis_PackCache, uId), pack); err == nil {
		return
	} else if err == redis.RedisNil {
		if pack, err = db.Defsys.Pack_QueryUserPack(uId); err == nil {
			this.redis.Set(fmt.Sprintf(Redis_PackCache, uId), pack, -1)
		} else if err == mgo.MongodbNil {
			err = nil
		}
	}
	return
}

///添加或则减少物品到用户背包
func (this *Cache) Pack_AddItemToUserPack(uId string, itemId int32, addnum int32) (err error) {
	var (
		pack    *pb.DB_UserPackData
		modifys []*pb.DB_GridData
		leftnum int64
		num     int64
	)
	if addnum == 0 {
		return
	}
	if pack, err = this.Pack_QueryUserPack(uId); err != nil {
		return
	}
	leftnum = int64(addnum)
	modifys = make([]*pb.DB_GridData, 0)
	for _, v := range pack.Pack {
		if !v.IsEmpty && v.ItemId == itemId {
			num = int64(v.Amount) + int64(leftnum)
			if num < 0 {
				leftnum += int64(v.Amount)
				v.Amount = 0
				modifys = append(modifys, v)
			} else if num > 0 && num < int64(v.Amount) {
				leftnum = 0
				v.Amount = uint32(num)
				modifys = append(modifys, v)
				break
			} else if num > 0 && num > int64(v.Amount) {
				if num <= GridCapMaxNum {
					leftnum = 0
					v.Amount = uint32(num)
					modifys = append(modifys, v)
					break
				} else {
					if v.Amount < GridCapMaxNum {
						leftnum = int64(num - int64(v.Amount))
						v.Amount = uint32(num)
						modifys = append(modifys, v)
					}
				}
			}
		}
	}
	return
}