import type { PartnerMe } from '@dukang/shared-types';
import { isOnAppPath, toAppPath } from '@dukang/weixin-sdk';

export const apiBase = '/api/v1';

const LAST_PHONE = 'partnerLastPhone';
const PARTNER_PROFILE = 'partnerProfile';

export type PartnerSessionProfile = Pick<PartnerMe, 'id' | 'name' | 'phone' | 'companyName'>;

export type PartnerAuthPayload = {
  accessToken: string;
  partner?: PartnerSessionProfile;
};

export type ApiRequestOptions = RequestInit & {
  /** 保留字段，兼容旧调用；错误提示由页面自行处理 */
  silent?: boolean;
};

export function getLastPhone() {
  return localStorage.getItem(LAST_PHONE) ?? '';
}

export function getPartnerProfile(): PartnerSessionProfile | null {
  try {
    const raw = localStorage.getItem(PARTNER_PROFILE);
    return raw ? (JSON.parse(raw) as PartnerSessionProfile) : null;
  } catch {
    return null;
  }
}

export async function request<T>(
  clientApp: string,
  path: string,
  options: ApiRequestOptions = {},
): Promise<T> {
  const { silent, ...fetchOptions } = options;
  const token = localStorage.getItem('accessToken');
  const headers: Record<string, string> = {
    'Content-Type': 'application/json',
    'X-Client-App': clientApp,
    ...(fetchOptions.headers as Record<string, string>),
  };
  if (token) headers.Authorization = `Bearer ${token}`;
  const res = await fetch(`${apiBase}${path}`, { ...fetchOptions, headers });
  const json = await res.json().catch(() => ({ code: res.status, message: '网络异常' }));
  const rawMessage = json.message;
  const message = Array.isArray(rawMessage)
    ? rawMessage.join('；')
    : (rawMessage || (res.status === 401 ? '登录已过期，请重新登录' : '请求失败'));

  if (res.status === 401 || json.code === 401) {
    if (token && localStorage.getItem('accessToken') === token) {
      clearAuth();
      if (typeof window !== 'undefined' && !isOnAppPath('/login')) {
        window.location.href = toAppPath('/login');
      }
    }
    throw new Error(message);
  }
  if (json.code !== 0) {
    throw new Error(message);
  }
  return json.data as T;
}

export function saveAuth(data: PartnerAuthPayload) {
  localStorage.setItem('accessToken', data.accessToken);
  if (data.partner) {
    localStorage.setItem(PARTNER_PROFILE, JSON.stringify(data.partner));
    localStorage.setItem(LAST_PHONE, data.partner.phone);
  }
}

export function clearAuth() {
  localStorage.removeItem('accessToken');
  localStorage.removeItem(PARTNER_PROFILE);
}

export function isLoggedIn() {
  return !!localStorage.getItem('accessToken');
}