import { MongoBaseService } from "cgserver";
import { MongoBaseModel } from "cgserver";
import _ from "underscore";
import { GItemCfg, ItemItem } from "../Config/ItemConfig";

export enum EBagItemState
{
    None,
    Using,//使用中
    Used//使用完毕
}
export class BagItemItem
{
    //实例id user_id+"_"+item.id+"_"+random
    id=""
    item_id:number=-1
    state=EBagItemState.None
    /**
     * 数量
     */
    count:number=1
    create_time=-1
}
export class BagModel extends MongoBaseModel
{
    user_id:number=-1
    items:Array<BagItemItem>=null
}
export let GBagSer:BagService=null
export class BagService extends MongoBaseService<BagModel>
{
    async getByUserId(user_id:number)
    {
        let bag:BagModel = await this.get(null,{user_id:user_id})
        if(!bag)
        {
            return []
        }
        let items = bag.items
        return items||[]
    }
    async getItem(where)
    {
        let one = await this.get(null,where)
        if(!one||!one.items||one.items.length==0)
        {
            return null
        }
        return <BagItemItem>one.items[0]
    }
    async removeItem(user_id:number,id:string,count=1)
    {
        let item = await this.getItem({user_id:user_id,"items.$.id":id})
        item.count-=count
        if(item.count>0)
        {
            await this.updateOne({$inc:{"items.$.count":-1}},{user_id:user_id,"items.id":id})
        }
        else
        {
            await this.updateOne({user_id:user_id},{$pull:{"items":{"id":id}}})
        }
    }
    async addItems(user_id:number,items:Array<number>)
    {
        for(let i=0;i<items.length;++i)
        {
            let item = GItemCfg.getItemById(items[i])
            if(!item)
            {
                continue
            }
            await this.addItem(user_id,item)
        }
    }
    async addItem(user_id:number,item:ItemItem)
    {
        let bii = new BagItemItem()
        bii.id=user_id+"_"+item.id+"_"+_.random(11111,99999)
        bii.item_id=item.id
        bii.create_time=Date.now()
        //强制堆叠
        if(false)
        {
            this.updateOne({$push:{items:bii}},{user_id:user_id})
            return null
        }
        let pre_item = await this.getItem({user_id:user_id,"items.item_id":item.id})
        if(pre_item)
        {
            let rs=await this.updateOne({$inc:{"items.$.count":1}},{user_id:user_id,"items.item_id":item.id})
            if(rs.errcode)
            {
                return null
            }
            pre_item.count+=1
            return pre_item
        }
        let rs = await this.updateOne({"$push":{"items":bii}},{user_id:user_id},true)
        if(rs.errcode)
        {
            return null
        }
        return bii
    }
}
GBagSer=new BagService("bag",BagModel)