export function isTui(item){
	return  item.status=='return'||item.status=='refund'||item.status=='refunding'
}

//计算商品券优惠价格
export function returnProductCouponPrice(coup, goodsArr, vipUser) {
    const item = goodsArr.find(v => v.productId == coup.proId);
    if(!item){
        return 0
    }
    const memberPrice = item.memberPrice ? item.memberPrice : item.price;
    const price = item ? (vipUser.isVip ? memberPrice : item.price) : 0;
    return price*coup.num

}
//返回新的商品列表，过滤掉退菜的，退单的商品
export function returnNewGoodsList(arr) {
    let goodsMap={}
    return arr.filter(v => !isTui(v))
}
//根据当前购物车商品以及数量,已选券对应商品数量，判断该商品券是否可用
export function returnCoupCanUse(goodsArr=[],coup,selCoupArr=[]) {
	// if(!coup.use){
	// 	return false
	// }
	const findGoods=goodsArr.filter(v=>v.productId==coup.proId)
	if(!findGoods.length){
		return false
	}
	const findGoodsTotalNumber=findGoods.reduce((prve,cur)=>{
		return prve+cur.num*1
	},0)
	const selCoupNumber=selCoupArr.filter(v=>v.proId==coup.proId).reduce((prve,cur)=>{
		return prve+cur.num*1
	},0)
	if(selCoupNumber>=findGoodsTotalNumber){
		return false
	}
	return findGoodsTotalNumber<(coup.num+selCoupNumber)?false:true
}
//查找购物车商品根据购物车商品数据返回商品券信息（抵扣价格以及是否满足可用需求）
export function returnProductCoupon(coup, goodsArr, vipUser,selCoupArr=[]) {
    const newGoodsArr = returnNewGoodsList(goodsArr)
    const item = newGoodsArr.find(v => v.productId == coup.proId);
    if(!item){
        return {...coup, discountAmount: 0,use:false}
    }
    const memberPrice = item.memberPrice ? item.memberPrice : item.price;
    const price = item ? (vipUser.isVip ? memberPrice : item.price) : 0;
	const discountAmount=(price*coup.num).toFixed(2)
	console.log(discountAmount);
	
    const canUse=!coup.use?false:(discountAmount>0&&returnCoupCanUse(goodsArr,coup,selCoupArr))
    // const canUse=discountAmount>0
    return { ...coup, discountAmount: discountAmount,use:canUse}

}
/**
 * 根据购物车商品计算商品券抵扣价格以及是否满足可用需求
 * 1.商品券对应商品数量大于购物车对应商品数量不可用
 * 2.未在购物车找到相关商品不可用
 * @param {*} coupArr 
 * @param {*} goodsArr 
 * @param {*} vipUser 
 * @returns 
 */
export function returnProductAllCoup(coupArr, goodsArr, vipUser){
    return coupArr.map((v) => {
        return returnProductCoupon(v, goodsArr, vipUser)
      })

}

//计算商品券总优惠价格
export function returnProductCouponAllPrice(coupArr, goodsArr, vipUser) {
    if(coupArr.length == 0){
        return 0;
    }
    return coupArr.reduce((a, b) => {
        const price = returnProductCouponPrice(b, goodsArr, vipUser)
        return a + price;
    }, 0).toFixed(2);

}
//计算满减券总优惠价格
export function returnFullReductionCouponAllPrice(coupArr) {
    if(coupArr.length == 0){
        return 0;
    }
    return coupArr.filter(v => v.type == 1).reduce((a, b) => {
        const price = b.discountAmount
        return a + price;
    }, 0).toFixed(2);

}
//计算优惠券总价格
export function returnCouponAllPrice(coupArr, goodsArr, vipUser) {
    const poductAllprice=returnProductCouponAllPrice(coupArr, goodsArr, vipUser)
    const pointAllPrice=returnFullReductionCouponAllPrice(coupArr)
    return (poductAllprice*1+pointAllPrice*1).toFixed(2);
}