import type { ClientRuntimeConfig, WechatLoginResult } from '@dukang/shared-types';
import { isWxAuthorizeEnabled } from '@dukang/shared-types';
import { WECHAT_INAPP_REQUIRED_MSG } from '@dukang/weixin-sdk';
import { isWechatEnv, weixinSdk } from './weixin';
import { request, saveAuth } from './api';

export type PartnerProfile = {
  id: string;
  name: string;
  phone: string;
  companyName: string;
  hasWechat?: boolean;
};

export async function fetchClientConfig(): Promise<ClientRuntimeConfig> {
  return request<ClientRuntimeConfig>('PARTNER_H5', '/common/client-config');
}

export async function fetchPartnerProfile(): Promise<PartnerProfile> {
  return request<PartnerProfile>('PARTNER_H5', '/partner/me');
}

/** 微信内上传照片前需完成公众号授权绑定 */
export function needsWechatAuth(
  profile: PartnerProfile | null,
  config?: Pick<ClientRuntimeConfig, 'wxAuthorize'> | null,
): boolean {
  if (config && !isWxAuthorizeEnabled(config)) return false;
  return isWechatEnv() && !!profile && !profile.hasWechat;
}

export async function checkNeedsWechatAuth(profile: PartnerProfile | null): Promise<boolean> {
  const config = await fetchClientConfig();
  return needsWechatAuth(profile, config);
}

/** 处理微信登录/绑定结果，返回是否已拿到 token 可进入首页 */
export function handlePartnerWechatLoginResult(result: WechatLoginResult): boolean {
  if (!result.accessToken) return false;
  saveAuth({ accessToken: result.accessToken });
  return true;
}

/** 微信登录成功后拉取并缓存合伙人资料，供一键登录页展示 */
export async function persistPartnerProfileAfterLogin(): Promise<void> {
  try {
    const profile = await fetchPartnerProfile();
    saveAuth({
      accessToken: localStorage.getItem('accessToken') ?? '',
      partner: profile,
    });
  } catch {
    /* ignore */
  }
}

export async function handlePartnerWechatCallback(): Promise<WechatLoginResult | null> {
  if (!isWechatEnv()) return null;
  const config = await fetchClientConfig();
  if (!isWxAuthorizeEnabled(config)) return null;
  return weixinSdk.handleOAuthCallback();
}

/**
 * 微信授权登录（对齐 C 端：仅微信内置浏览器走 OAuth）。
 * 返回 true = 已登录；void = 已跳转授权页等待回调。
 */
export async function loginPartnerWithWechat(): Promise<boolean | void> {
  const config = await fetchClientConfig();
  if (!isWxAuthorizeEnabled(config)) return false;
  if (!isWechatEnv()) {
    throw new Error(WECHAT_INAPP_REQUIRED_MSG);
  }
  const result = await weixinSdk.login();
  if (result) return handlePartnerWechatLoginResult(result);
}

export async function authorizePartnerWechat(): Promise<WechatLoginResult | void> {
  const config = await fetchClientConfig();
  if (!isWxAuthorizeEnabled(config)) return;
  if (!isWechatEnv()) {
    throw new Error(WECHAT_INAPP_REQUIRED_MSG);
  }
  return weixinSdk.login();
}

/** @deprecated 使用 handlePartnerWechatLoginResult */
export function savePartnerWechatAuth(result: WechatLoginResult): boolean {
  return handlePartnerWechatLoginResult(result);
}