/**
  Represents a user's stream

  @class UserStream
  @extends Discourse.Model
  @namespace Discourse
  @module Discourse
**/
Discourse.UserStream = Discourse.Model.extend({
  loaded: false,

  init: function() {
    this.setProperties({ itemsLoaded: 0, content: [] });
  },

  filterParam: function() {
    var filter = this.get('filter');
    if (filter === Discourse.UserAction.TYPES.replies) {
      return [Discourse.UserAction.TYPES.replies,
              Discourse.UserAction.TYPES.mentions,
              Discourse.UserAction.TYPES.quotes].join(",");
    }
    return filter;
  }.property('filter'),

  baseUrl: Discourse.computed.url('itemsLoaded', 'user.username_lower', '/user_actions.json?offset=%@&username=%@'),

  filterBy: function(filter) {
    if (this.get('loaded') && (this.get('filter') === filter)) { return Ember.RSVP.resolve(); }

    this.setProperties({
      filter: filter,
      itemsLoaded: 0,
      content: []
    });
    return this.findItems();
  },

  findItems: function() {
    var userStream = this;
    if(this.get('loading')) { return Ember.RSVP.reject(); }

    this.set('loading', true);

    var url = this.get('baseUrl');
    if (this.get('filterParam')) {
      url += "&filter=" + this.get('filterParam');
    }

    var loadingFinished = function() {
      userStream.set('loading', false);
    };

    return Discourse.ajax(url, {cache: 'false'}).then( function(result) {
      if (result && result.user_actions) {
        var copy = Em.A();
        result.user_actions.forEach(function(action) {
          copy.pushObject(Discourse.UserAction.create(action));
        });

        userStream.get('content').pushObjects(Discourse.UserAction.collapseStream(copy));
        userStream.setProperties({
          loaded: true,
          itemsLoaded: userStream.get('itemsLoaded') + result.user_actions.length
        });
      }
      loadingFinished();
    }, loadingFinished);
  }

});