/*
  This can be mixed into a route to provide pagination support. 
*/
App._PaginatedRouteMixin = Ember.Mixin.create({
  paginationRoute: Ember.required(String),

  // This function is for use in a route that calls find() to get a
  // paginated collection of records.  It takes the pagination metadata
  // from the store and puts it into the record array.
  _includePagination: function(records){
    var metadata = records.store.typeMapFor(records.type).metadata;
    // put the pagination content directly on the collection
    records.set('pagination', metadata.pagination);
    return records;
  },

  actions: {
    gotoPage: function(pageNum){
      var last = this.get('controller.content.pagination.total_pages') || 1;
      var num = Util.clamp(pageNum, 1, last);
      this.transitionTo(this.paginationRoute, num);
    },
    nextPage: function(){
      var cur = this.get('controller.content.pagination.current_page') || 0;
      this.transitionTo(this.paginationRoute, cur + 1);
    },
    previousPage: function(){
      var cur = this.get('controller.content.pagination.current_page') || 2;
      this.transitionTo(this.paginationRoute, cur - 1);
    },
    lastPage: function(){
      var last = this.get('controller.content.pagination.total_pages') || 1;
      this.transitionTo(this.paginationRoute, last);
    },
    firstPage: function(){
      this.transitionTo(this.paginationRoute, 1);
    }
  }

});


// MODEL

App.Message = DS.Model.extend({
  created_at: DS.attr('date'),
  text: DS.attr('string')
});


// ROUTES

App.MessagesIndexRoute = Ember.Route.extend({
  redirect: function(){
    this.transitionTo('messages.page', 1);
  }
});

App.MessagesPageRoute = Ember.Route.extend(App._PaginatedRouteMixin, {
   paginationRoute: 'messages.page',
   
   model: function(params){
     var query = { page: params.num };
     return this.get('store').find('message', query).then(this._includePagination);
   }
      
});


// CONTROLLER

App.MessagesPageController = Ember.ArrayController.extend({
});