import { CUSTOMER_SERVICE_PHONE, CUSTOMER_SERVICE_WECOM_URL } from '@dukang/shared-types';
import { fetchClientConfig } from './pay-wechat';
import { isWechatEnv } from './weixin';

let cachedPhone = CUSTOMER_SERVICE_PHONE;

/** 企微客服链接：优先 Vite env，否则 shared-types 默认 */
export function getCustomerServiceWecomUrl(): string {
  const fromEnv = import.meta.env.VITE_CS_WECOM_URL?.trim();
  return fromEnv || CUSTOMER_SERVICE_WECOM_URL;
}

export function getCustomerServicePhone(): string {
  return cachedPhone;
}

/** 从系统设置拉取客服电话（失败则保持默认常量） */
export async function loadCustomerServicePhone(): Promise<string> {
  try {
    const cfg = await fetchClientConfig();
    const phone = cfg.customerServicePhone?.trim();
    if (phone) cachedPhone = phone;
  } catch {
    /* keep fallback */
  }
  return cachedPhone;
}

/**
 * 打开企业微信客服会话（须在微信内；需用户点击手势）。
 * @returns true 已跳转；false 非微信环境已提示
 */
export function openWecomCustomerService(): boolean {
  if (!isWechatEnv()) {
    window.alert('请在微信中打开以联系在线客服');
    return false;
  }
  window.location.href = getCustomerServiceWecomUrl();
  return true;
}

/** @deprecated 请用 getCustomerServicePhone()，保留兼容旧引用 */
export { CUSTOMER_SERVICE_PHONE };