$(function () {

    'use strict';

    var data = [];

    /*
    Reference DOM elements
     */
    var go = $('#go'), goError = $('#go-error'), nogo = $('#nogo'), nogoError = $('#nogo-error');

    /*
    Task flow variables
     */
    var counter = 0, currentTrial = null, correct = null, keyPressed = false, goErrorTimeout, nogoErrorTimeout,
        timer = void 0, time_elapsed = void 0;

    var _createClass = function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; }();

    function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }

    var Timer = function () {
        // begin timer, end timer, and difference time.
        function Timer() {
            _classCallCheck(this, Timer);

            this.start_time = new Date().getTime();
        }

        _createClass(Timer, [{
            key: 'start',
            value: function start() {
                this.start_time = new Date().getTime();
            }
        }, {
            key: 'get_elapsed',
            value: function get_elapsed() {
                return new Date().getTime() - this.start_time;
            }
        }]);

        return Timer;
    }();


    goNoGo();

    $(this).on('keydown', function (e) {
        if (e.which === 32) {
            e.preventDefault();
            if(!keyPressed) {
                time_elapsed = timer.get_elapsed();
                answerCheck();
            }
        }
    });

    $('#gonogo-bar').on('click', function () {
        if(!keyPressed) {
            time_elapsed = timer.get_elapsed();
            answerCheck();
        }
    });

    function goNoGo() {
        counter ++;
        currentTrial = trials[counter-1];
        go.hide();
        nogo.hide();
        setTimeout(function () {
            keyPressed = false;
            timer = new Timer();
            $('#'+currentTrial).show();
            }, 300);
        if(currentTrial === 'go') {
            goErrorTimeout = setTimeout(function () {
                correct = false;
                console.log(data);
                go.hide();
                keyPressed = true;
                goError.show();
                setTimeout(function () {
                    goError.hide();
                    fillData(counter, currentTrial, correct, 2000);
                    goNoGo()
                }, 2000)
            }, 2000)
        } else {
            nogoErrorTimeout = setTimeout(function () {
                correct = true;
                fillData(counter, currentTrial, correct, 2000);
                console.log(data);
                nogo.hide();
                goNoGo();
            }, 2000)
        }
    }

    function answerCheck() {
        keyPressed = true;
        if (currentTrial === 'nogo'){
            correct = false;
            clearTimeout(nogoErrorTimeout);
            nogo.hide();
            nogoError.show();
            setTimeout(function () {
                nogoError.hide();
                fillData(counter, currentTrial, correct, time_elapsed);
                console.log(data);
                goNoGo()
            }, 2000)
        } else {
            correct = true;
            clearTimeout(goErrorTimeout);
            fillData(counter, currentTrial, correct, time_elapsed);
            console.log(data);
            goNoGo();
        }
    }

    function fillData(counter, trial, correct, timeElapsed) {
        data.push({id: counter, trial: trial, correct: correct, time_elapsed: timeElapsed});
        if (data.length === trials.length) {
            $('input[name=gonogo_trials]').val(JSON.stringify(data));
            $('#form').submit()
        }
    }

});