const ZPAY_PID = process.env.ZPAY_PID || "2025121809351743";
const ZPAY_KEY = process.env.ZPAY_KEY || "tpEi7wWIWI2kXiYVTpIG6j7it0mjVW89";
const ZPAY_QUERY_URL =
  process.env.ZPAY_QUERY_URL || "https://zpayz.cn/api.php";
const ZPAY_QUERY_TIMEOUT_MS = Number(
  process.env.ZPAY_QUERY_TIMEOUT_MS || 5000
);

export type ZPayStatusResult = {
  ok: boolean;
  paid: boolean;
  status?: string;
  error?: string;
  url: string;
};

export async function queryZPayOrderStatus(
  orderId: string,
  timeoutMs = ZPAY_QUERY_TIMEOUT_MS
): Promise<ZPayStatusResult | null> {
  const normalizedOrderId = orderId.trim();
  if (!normalizedOrderId || !ZPAY_PID || !ZPAY_KEY) {
    return null;
  }

  const url = new URL(ZPAY_QUERY_URL);
  url.searchParams.set("act", "order");
  url.searchParams.set("pid", ZPAY_PID);
  url.searchParams.set("key", ZPAY_KEY);
  url.searchParams.set("out_trade_no", normalizedOrderId);

  try {
    const res = await fetch(url.toString(), {
      cache: "no-store",
      signal: AbortSignal.timeout(timeoutMs),
    });
    const data = await res.json().catch(() => ({}));
    const code = String(data?.code || "").trim();
    const status = String(data?.status || "").trim();

    return {
      ok: res.ok,
      paid: res.ok && code === "1" && status === "1",
      status,
      url: url.toString(),
      error:
        res.ok && code === "1"
          ? undefined
          : String(data?.msg || `status=${res.status}`),
    };
  } catch (error) {
    return {
      ok: false,
      paid: false,
      url: url.toString(),
      error: error instanceof Error ? error.message : String(error),
    };
  }
}