// Copyright (C) 2016 The Android Open Source Project
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
(function() {
  'use strict';

  Polymer({
    is: 'gr-avatar',

    properties: {
      account: {
        type: Object,
        observer: '_accountChanged',
      },
      imageSize: {
        type: Number,
        value: 16,
      },
    },

    created: function() {
      this.hidden = true;
    },

    attached: function() {
      this.$.restAPI.getConfig().then(function(cfg) {
        var hasAvatars = !!(cfg && cfg.plugin && cfg.plugin.has_avatars);
        if (hasAvatars) {
          this.hidden = false;
          // src needs to be set if avatar becomes visible
          this._updateAvatarURL(this.account);
        }
      }.bind(this));
    },

    _accountChanged: function(account) {
      this._updateAvatarURL(account);
    },

    _updateAvatarURL: function(account) {
      if (!this.hidden && account) {
        var url = this._buildAvatarURL(this.account);
        if (url) {
          this.style.backgroundImage = 'url("' + url + '")';
        }
      }
    },

    _buildAvatarURL: function(account) {
      if (!account) { return ''; }
      var avatars = account.avatars || [];
      for (var i = 0; i < avatars.length; i++) {
        if (avatars[i].height === this.imageSize) {
          return avatars[i].url;
        }
      }
      return '/accounts/' + account._account_id + '/avatar?s=' + this.imageSize;
    },
  });
})();