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import type { QuoteContractRates } from "@/workers/rpa/quote-capture/quote-contract-guard";
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/** 归一化后的报价 rates（契约校验唯一输入） */
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export type CanonicalQuote = {
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rates: QuoteContractRates;
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/** 解析来源路径（debug） */
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sourcePath: string;
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};
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function isRatesObject(value: unknown): value is QuoteContractRates {
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return value != null && typeof value === "object" && !Array.isArray(value);
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}
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function hasRatesBranchShape(rates: QuoteContractRates): boolean {
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return Object.keys(rates).some((key) => {
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if (key === "fastest") {
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return true;
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}
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const val = rates[key];
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return val != null && typeof val === "object" && !Array.isArray(val);
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});
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}
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function readPath(obj: unknown, ...keys: string[]): unknown {
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let cur = obj;
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for (const key of keys) {
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if (cur == null || typeof cur !== "object" || Array.isArray(cur)) {
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return undefined;
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}
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cur = (cur as Record<string, unknown>)[key];
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}
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return cur;
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}
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type RatesCandidate = { rates: QuoteContractRates; sourcePath: string };
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function tryRatesAt(
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rates: unknown,
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sourcePath: string,
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): RatesCandidate | null {
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if (!isRatesObject(rates) || !hasRatesBranchShape(rates)) {
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return null;
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}
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return { rates, sourcePath };
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}
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/**
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* 从 API body 解析 rates（支持常见嵌套变体）。
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* body.rates | body.data.rates | body.result.rates | array[0].rates
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*/
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export function resolveRatesFromBody(body: unknown): RatesCandidate | null {
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if (body == null) {
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return null;
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}
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if (Array.isArray(body)) {
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if (body.length > 0) {
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const fromFirst = tryRatesAt(
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readPath(body[0], "rates"),
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"[0].rates",
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);
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if (fromFirst) {
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return fromFirst;
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}
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}
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return null;
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}
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if (typeof body !== "object") {
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return null;
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}
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const candidates: RatesCandidate[] = [];
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const direct = tryRatesAt(readPath(body, "rates"), "rates");
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if (direct) {
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candidates.push(direct);
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}
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const fromData = tryRatesAt(readPath(body, "data", "rates"), "data.rates");
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if (fromData) {
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candidates.push(fromData);
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}
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const fromResult = tryRatesAt(
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readPath(body, "result", "rates"),
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"result.rates",
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);
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if (fromResult) {
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candidates.push(fromResult);
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}
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return candidates[0] ?? null;
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}
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/** body → CanonicalQuote；无法解析 rates 时返回 null */
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export function normalizeQuote(body: unknown): CanonicalQuote | null {
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const resolved = resolveRatesFromBody(body);
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if (!resolved) {
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return null;
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}
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return {
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rates: resolved.rates,
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sourcePath: resolved.sourcePath,
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};
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}
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