/**
 * 支付环境检测：PC / H5 / 微信浏览器
 */

export type PayEnv = "pc" | "h5" | "wechat";

export type PayChannel = "alipay" | "wxpay";

export function isWeChat(): boolean {
  if (typeof navigator === "undefined") return false;
  return /MicroMessenger/i.test(navigator.userAgent);
}

export function isAlipay(): boolean {
  if (typeof navigator === "undefined") return false;
  return /AlipayClient|Alipay/i.test(navigator.userAgent);
}

export function isMobile(): boolean {
  if (typeof navigator === "undefined") return false;
  return /AppleWebKit.*Mobile|Android|webOS|iPhone|iPad|iPod|BlackBerry|IEMobile|Opera Mini/i.test(
    navigator.userAgent
  );
}

export function getPayEnv(): PayEnv {
  if (isWeChat()) return "wechat";
  if (isMobile()) return "h5";
  return "pc";
}

export function getRecommendedChannel(env: PayEnv): PayChannel {
  return "wxpay";  // 默认微信支付（PC/H5/微信内均优先）
}

export function mustUseWxPay(env: PayEnv): boolean {
  return env === "wechat";
}