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 _, d := range discounts {
        val := d.Discount
        if val > 1 && val <= 100 {
            val = val / 100.0
        }
        if val < 0 {
            val = 0
        }
        if inputMonths >= d.Quantity && val < finalDiscount {
            finalDiscount = val
        }
    }

    return finalDiscount
}