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import { roundHalfUp } from "@/lib/math";
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export type MarkupType = "percent" | "fixed";
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export const MARKUP_PERCENT_MIN = 0;
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export const MARKUP_PERCENT_MAX = 30;
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export const MARKUP_PERCENT_DECIMALS = 2;
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export const MARKUP_FIXED_MAX = 99_999.99;
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export type ParsedMarkupInput = {
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markupType: MarkupType;
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markupPercent: number;
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markupFixedAmount: number | null;
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};
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export type MarkupValidationError =
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| { code: "INVALID_BODY"; message: string }
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| { code: "PERCENT_TOO_HIGH"; message: string }
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| { code: "INVALID_PERCENT"; message: string }
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| { code: "INVALID_FIXED"; message: string };
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function parseMarkupType(value: unknown): MarkupType | null {
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if (value === undefined || value === null || value === "") {
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return "percent";
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}
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if (value === "percent" || value === "fixed") {
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return value;
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}
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return null;
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}
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function parsePercentValue(value: unknown): number | null {
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if (typeof value !== "number" || Number.isNaN(value)) {
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return null;
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}
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return roundHalfUp(value, MARKUP_PERCENT_DECIMALS);
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}
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function parseFixedAmount(value: unknown): number | null {
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if (typeof value !== "number" || Number.isNaN(value)) {
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return null;
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}
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if (value < 0 || value > MARKUP_FIXED_MAX) {
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return null;
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}
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return roundHalfUp(value, 2);
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}
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/** 解析并校验加价配置入参（宿主 API / 管理端共用） */
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export function parseMarkupInput(body: {
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markup_type?: unknown;
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markup_percent?: unknown;
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markup_fixed_amount?: unknown;
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}): ParsedMarkupInput | MarkupValidationError {
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const markupType = parseMarkupType(body.markup_type);
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if (!markupType) {
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return { code: "INVALID_BODY", message: "加价方式无效，请使用 percent 或 fixed" };
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}
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if (markupType === "fixed") {
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const fixed = parseFixedAmount(body.markup_fixed_amount);
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if (fixed === null) {
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if (
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typeof body.markup_fixed_amount === "number" &&
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body.markup_fixed_amount > MARKUP_FIXED_MAX
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) {
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return {
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code: "INVALID_FIXED",
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message: `固定加价金额不能超过 $${MARKUP_FIXED_MAX.toFixed(2)}`,
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};
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}
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return {
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code: "INVALID_FIXED",
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message: "请提供有效的固定加价金额（≥ 0）",
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};
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}
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return {
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markupType: "fixed",
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markupPercent: 0,
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markupFixedAmount: fixed,
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};
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}
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const percent = parsePercentValue(body.markup_percent);
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if (percent === null) {
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return { code: "INVALID_PERCENT", message: "请提供有效的加价比例（0~30%，步长 0.01%）" };
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}
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if (percent > MARKUP_PERCENT_MAX) {
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return { code: "PERCENT_TOO_HIGH", message: "加价比例不能超过 30%" };
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}
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if (percent < MARKUP_PERCENT_MIN) {
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return { code: "INVALID_PERCENT", message: "请提供有效的加价比例（0~30%，步长 0.01%）" };
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}
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return {
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markupType: "percent",
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markupPercent: percent,
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markupFixedAmount: null,
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};
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}
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