package utils

import (
	"fmt"
	"strconv"

	v2 "gitea.timerzz.com/kedaya_haitao/common/structs/v2"
)

func ProfitRate(article *v2.Article) (after *v2.Article, changed bool) {
	// 拿到最低成本价和最低售价
	var cost, sell float64
	//检查能不能购买，只要有一个供应商能买，就认为能购买
	var available bool

	for _, provider := range article.Providers {
		final := provider.Cost.FinalPrice
		if final > 0 && (final < cost || cost == 0) && !provider.Exclude {
			if available && !provider.Available {
				// 上个最低价供应商能买，这个供应商不能买，那么即使现在的供应商价格更低，也不使用
				continue
			}
			cost = final
		}
		available = available || provider.Available
	}

	for _, seller := range article.Sellers {
		final := seller.Sell.FinalPrice
		if final > 0 && (final < sell || sell == 0) && !seller.Exclude {
			sell = final
		}
	}
	// 成本和售价没有改动，不保存，直接返回
	if cost == article.CostPrice && sell == article.SellPrice {
		return article, false
	}
	// 到这里说明成本和售价有变动
	article.CostPrice = Decimal(cost)
	article.SellPrice = Decimal(sell)
	article.Available = available
	if cost > 0 {
		article.Rate = Decimal((article.SellPrice - article.CostPrice) * 100 / article.CostPrice)
	}
	article.GrossProfit = Decimal(article.SellPrice - article.CostPrice)
	return article, true
}

func Decimal(num float64) float64 {
	num, _ = strconv.ParseFloat(fmt.Sprintf("%.2f", num), 64)
	return num
}