// 使用Facebook JavaScript SDK初始化
FB.init({
  appId: 'YOUR_APP_ID',
  cookie: true,
  xfbml: true,
  version: 'v2.12'  // 注意使用支持的API版本
});

// 登录并获取权限
FB.login(function(response) {
  if (response.authResponse) {
    // 用户已授权
    getOnlineFriends();
  } else {
    console.log('用户取消登录或未完全授权');
  }
}, {scope: 'user_online_presence,friends_online_presence'});

// 获取在线好友函数
function getOnlineFriends() {
  FB.api({
    method: 'fql.query',
    query: 'SELECT uid, name, online_presence FROM user WHERE uid IN (SELECT uid2 FROM friend WHERE uid1 = me()) AND online_presence IN ("active", "idle")'
  }, function(response) {
    console.log('在线好友:', response);
    // 处理返回的好友数据
    displayOnlineFriends(response);
  });
}

// 显示在线好友
function displayOnlineFriends(friends) {
  let onlineList = document.getElementById('online-friends');
  friends.forEach(friend => {
    let li = document.createElement('li');
    li.textContent = `${friend.name} (${friend.online_presence})`;
    onlineList.appendChild(li);
  });
}

FB.api(
  '/me/friends?fields=id,name,online_presence',
  'GET',
  {},
  function(response) {
    let onlineFriends = response.data.filter(friend => 
      friend.online_presence === 'active' || friend.online_presence === 'idle'
    );
    console.log('在线好友:', onlineFriends);
  }
);