import { REDEEM_WEAKNET_FAIL_THRESHOLD } from '@dukang/shared-types';
import type { RedeemErrorClass, RedeemFailureReportResult } from '@dukang/shared-types';
import { request } from './api';

export function isNetworkError(e: unknown): boolean {
  const err = e as Error & { status?: number };
  const status = err.status;
  const message = (err.message ?? String(e)).toLowerCase();
  if (status != null && status >= 500) return true;
  if (status === 0 || status === 408 || status === 429 || status === 502 || status === 503 || status === 504) {
    return true;
  }
  if (/failed to fetch|network|timeout|timed out|abort|offline|连接|网络|超时/.test(message)) {
    return true;
  }
  // 无 status 的 fetch 失败通常是网络类
  if (status == null && e instanceof TypeError) return true;
  return false;
}

export async function reportRedeemFailure(
  token: string,
  step: 'preview' | 'confirm',
  error: unknown,
): Promise<RedeemFailureReportResult | null> {
  const err = error as Error & { status?: number };
  const errorClass: RedeemErrorClass = isNetworkError(error) ? 'NETWORK' : 'BUSINESS';
  try {
    return await request<RedeemFailureReportResult>('SHOP_H5', '/shop/redeem/failures', {
      method: 'POST',
      body: JSON.stringify({
        token,
        errorClass,
        message: err.message?.slice(0, 200),
        step,
      }),
    });
  } catch {
    if (errorClass === 'NETWORK') {
      return {
        failCount: REDEEM_WEAKNET_FAIL_THRESHOLD,
        thresholdReached: true,
        threshold: REDEEM_WEAKNET_FAIL_THRESHOLD,
      };
    }
    return null;
  }
}

export { REDEEM_WEAKNET_FAIL_THRESHOLD };