package step_price

import (
	"errors"
	"fusenapi/model/gmodel"
)

// 旧的返回厘（即将废弃）
func GetCentStepPrice(minBuyNum int, stepNum []int, stepPrice []int) int64 {
	if minBuyNum > stepNum[len(stepNum)-1] {
		return int64(stepPrice[len(stepPrice)-1])
	}
	for k, v := range stepNum {
		if minBuyNum <= v {
			if k <= (len(stepPrice) - 1) {
				return int64(stepPrice[k])
			}
			return int64(stepPrice[len(stepPrice)-1])
		}
	}
	return int64(stepPrice[len(stepPrice)-1])
}

// 新的阶梯价格(返回美元)
func GetNewStepPrice(purchaseQuantity int64, stepPrice gmodel.StepPriceJsonStruct, fittingPrice int64) (totalPrice, itemPrice float64, err error) {
	l := len(stepPrice.PriceRange)
	if l == 0 {
		return 0, 0, errors.New("price range is not set")
	}
	//遍历查询合适的价格
	for k, v := range stepPrice.PriceRange {
		//购买数量>起点
		if purchaseQuantity > v.StartQuantity {
			//最后一个 || 小于等于终点
			if k == l-1 || purchaseQuantity <= v.EndQuantity {
				itemPrice = float64(v.Price+fittingPrice) / 1000
				return itemPrice * float64(purchaseQuantity), itemPrice / 1000, nil
			}
		}
	}
	//遍历里面没有则返回第一个
	itemPrice = float64(stepPrice.PriceRange[0].Price+fittingPrice) / 1000
	return itemPrice * float64(purchaseQuantity), itemPrice, nil
}

// 新的阶梯价格(返回厘)
func GetNewCentStepPrice(purchaseQuantity int64, stepPrice gmodel.StepPriceJsonStruct, fittingPrice int64) (totalPrice, itemPrice int64, err error) {
	l := len(stepPrice.PriceRange)
	if l == 0 {
		return 0, 0, errors.New("price range is not set")
	}
	//遍历查询合适的价格
	for k, v := range stepPrice.PriceRange {
		//购买数量>起点
		if purchaseQuantity > v.StartQuantity {
			//最后一个 || 小于等于终点
			if k == l-1 || purchaseQuantity <= v.EndQuantity {
				itemPrice = v.Price + fittingPrice
				return itemPrice * purchaseQuantity, itemPrice, nil
			}
		}
	}
	//遍历里面没有则返回第一个
	itemPrice = stepPrice.PriceRange[0].Price + fittingPrice
	return itemPrice * purchaseQuantity, itemPrice, nil
}