/**
 * 带鉴权下载二进制文件（Excel 等）。
 * 为何：window.open 带 token 遇 JSON 错误页难提示；统一走 fetch + blob。
 */
import { useGlobSetting } from '/@/hooks/setting';
import { getToken } from '/@/utils/auth';

export type AuthDownloadParams = Record<string, string | number | undefined | null>;

/**
 * GET 下载附件并触发浏览器保存。
 * @param path 相对 API 路径，如 /inquiry/workOrder/view/export
 * @param params query 参数（空值跳过）
 * @param fallbackName 无 Content-Disposition 时的文件名
 */
export async function downloadAuthGet(
  path: string,
  params: AuthDownloadParams = {},
  fallbackName = 'download.bin',
): Promise<void> {
  const glob = useGlobSetting();
  const base = (glob.apiUrl || '').replace(/\/$/, '');
  const qs = new URLSearchParams();
  Object.keys(params).forEach((k) => {
    const v = params[k];
    if (v === undefined || v === null || String(v).trim() === '') return;
    qs.set(k, String(v));
  });
  const url = `${base}${path}${qs.toString() ? `?${qs.toString()}` : ''}`;
  const token = getToken() || '';
  const res = await fetch(url, {
    method: 'GET',
    headers: {
      'X-Access-Token': String(token),
    },
  });
  const ctype = (res.headers.get('content-type') || '').toLowerCase();
  if (!res.ok || ctype.includes('application/json')) {
    let msg = `下载失败 HTTP ${res.status}`;
    try {
      const j = await res.json();
      if (j?.message) msg = String(j.message);
    } catch {
      /* ignore */
    }
    throw new Error(msg);
  }
  const blob = await res.blob();
  let name = fallbackName;
  const cd = res.headers.get('content-disposition') || '';
  const m = /filename\*=UTF-8''([^;]+)|filename=\"?([^\";]+)\"?/i.exec(cd);
  if (m) {
    name = decodeURIComponent((m[1] || m[2] || name).trim());
  }
  const href = URL.createObjectURL(blob);
  const a = document.createElement('a');
  a.href = href;
  a.download = name;
  document.body.appendChild(a);
  a.click();
  a.remove();
  URL.revokeObjectURL(href);
}