var Footer = require('./Footer');
var Header = require('./Header');
var MainSection = require('./MainSection');
var createWidget = require('jquery-widget');
var TodoStore = require('../stores/TodoStore');

/**
 * Retrieve the current TODO data from the TodoStore
 */
function getTodoState() {
  return {
    allTodos: TodoStore.getAll(),
    areAllComplete: TodoStore.areAllComplete()
  };
}

var TodoApp = createWidget('TodoApp', {

  _getCreateOptions: getTodoState,

  _create: function() {
    this._on(TodoStore, {
        'change': '_onChange'
    });
  },

  /**
   * @return {object}
   */
  render: function() {
    return (
      <div>
        <Header />
        <MainSection
          allTodos={this.options.allTodos}
          areAllComplete={this.options.areAllComplete}
        />
        <Footer allTodos={this.options.allTodos} />
      </div>
    );
  },

  /**
   * Event handler for 'change' events coming from the TodoStore
   */
  _onChange: function() {
    this.option(getTodoState());
  }

});

module.exports = TodoApp;