package order

import "github.com/perfect-panel/server/internal/types"

// getDiscount 计算最终价格倍数
// 参数：discounts 折扣规则列表（数量阈值 + 折扣倍数）；inputMonths 购买时长
// 返回：最终价格倍数（如 0.95 表示按 95% 计价）
func getDiscount(discounts []types.SubscribeDiscount, inputMonths int64) float64 {
	var finalDiscount float64 = 1.0

	for _, discount := range discounts {
		if inputMonths >= discount.Quantity && discount.Discount < finalDiscount {
			finalDiscount = discount.Discount
		}
	}

	return finalDiscount
}