export const WECHAT_PROFILE_KEY = "miniapp:wechat-profile";

export type WechatProfile = {
  avatarUrl: string;
  nickName?: string;
};

function isWechatProfile(value: unknown): value is WechatProfile {
  if (!value || typeof value !== "object") return false;
  const profile = value as Partial<WechatProfile>;
  return typeof profile.avatarUrl === "string" && profile.avatarUrl.trim().length > 0;
}

export function getStoredWechatProfile(): WechatProfile | null {
  try {
    const value = uni.getStorageSync(WECHAT_PROFILE_KEY);
    return isWechatProfile(value) ? value : null;
  } catch {
    return null;
  }
}

export function saveWechatProfile(profile: WechatProfile) {
  if (!isWechatProfile(profile)) return;
  uni.setStorageSync(WECHAT_PROFILE_KEY, profile);
}

export function requestWechatProfile(): Promise<WechatProfile | null> {
  return new Promise((resolve) => {
    if (typeof uni.getUserProfile !== "function") {
      resolve(null);
      return;
    }

    uni.getUserProfile({
      provider: "weixin",
      desc: "用于展示您的微信头像",
      lang: "zh_CN",
      success: (result) => {
        const profile = {
          avatarUrl: result.userInfo?.avatarUrl?.trim() ?? "",
          nickName: result.userInfo?.nickName?.trim() || undefined,
        };
        resolve(isWechatProfile(profile) ? profile : null);
      },
      fail: () => resolve(null),
    });
  });
}