var vent = require('vent');
var CommandModel = require('./CommandModel');
var CommandCollection = require('./CommandCollection');
var CommandMessengerCollectionView = require('./CommandMessengerCollectionView');
var _ = require('underscore');
var moment = require('moment');
var Messenger = require('../Shared/Messenger');
require('../jQuery/jquery.spin');

module.exports = (function(){
    CommandMessengerCollectionView.render();
    var singleton = function(){
        return {
            _lastCommand        : {},
            Execute             : function(name, properties){
                var attr = _.extend({name : name.toLocaleLowerCase()}, properties);
                var commandModel = new CommandModel(attr);
                if(this._lastCommand.command && this._lastCommand.command.isSameCommand(attr) && moment().add('seconds', -5).isBefore(this._lastCommand.time)) {
                    Messenger.show({
                        message   : 'Please wait at least 5 seconds before running this command again',
                        hideAfter : 5,
                        type      : 'error'
                    });
                    return this._lastCommand.promise;
                }
                var promise = commandModel.save().success(function(){
                    CommandCollection.add(commandModel);
                });
                this._lastCommand = {
                    command : commandModel,
                    promise : promise,
                    time    : moment()
                };
                return promise;
            },
            bindToCommand       : function(options){
                var self = this;
                var existingCommand = CommandCollection.findCommand(options.command);
                if(existingCommand) {
                    this._bindToCommandModel.call(this, existingCommand, options);
                }
                CommandCollection.bind('add', function(model){
                    if(model.isSameCommand(options.command)) {
                        self._bindToCommandModel.call(self, model, options);
                    }
                });
                CommandCollection.bind('sync', function(){
                    var command = CommandCollection.findCommand(options.command);
                    if(command) {
                        self._bindToCommandModel.call(self, command, options);
                    }
                });
            },
            _bindToCommandModel : function bindToCommand (model, options){
                if(!model.isActive()) {
                    options.element.stopSpin();
                    return;
                }
                model.bind('change:state', function(model){
                    if(!model.isActive()) {
                        options.element.stopSpin();
                        if(model.isComplete()) {
                            vent.trigger(vent.Events.CommandComplete, {
                                command : model,
                                model   : options.model
                            });
                        }
                    }
                });
                options.element.startSpin();
            }
        };
    };
    return singleton();
}).call(this);