registerMode('multiple-choice', {

    validate: true,

    validateAnswer: function(question){
        var correctAnswers = 0;
        var wrongAnswers = 0;
        $('#question').find('.answers .answer').each(function() {
            $(this).off('click');
            var answer_id = $(this).attr('data-answer-id');
            var selected = $(this).hasClass('active');
            if((question.answers[answer_id].correct && selected) || (!question.answers[answer_id].correct && !selected)) {
                correctAnswers++;
            } else {
                wrongAnswers++;
            }
            if(question.answers[answer_id].correct) {
                $(this).addClass('correct');
            } else {
                $(this).addClass('wrong');
            }
        });

        var correct = wrongAnswers === 0 && correctAnswers > 0;
        if(correct) {
            $("#site .meta").removeClass("wrong");
            $("#site .meta").addClass("correct");
        } else {
            $("#site .meta").removeClass("correct");
            $("#site .meta").addClass("wrong");
            $("#check").removeClass("shake");
            setTimeout( function(){$("#check").addClass("shake");}, 100);
        }

        showHint(false);

        $("#check").unbind( "click" );
        $("#check").text("Weiter");
        $("#check").on("click", function(e){
            next();
        });


        return correct;

    },

    loadQuestion: function(question){
        var editArea = $('.meta #edit');
        var checkButton = $('#check');
        var questionContainer = $('#question');
        var hintContainer = $('#hint');
        var answersContainer = questionContainer.find('.answers');

        if(question.edit_url) {
            editArea.attr('href', question.edit_url);
            editArea.show();
        } else {
            editArea.hide();
        }

        checkButton.unbind( "click" );
        checkButton.text("Überprüfen");
        checkButton.on("click", function(){
            check();
        });

        questionContainer.find('.question').html(question.question);
        answersContainer.html('');
        hintContainer.fadeOut(0);
        hintContainer.html(question.hint);
        for(var i = 0; i < question.answers.length; i++) {
            var answer = question.answers[i];
            answersContainer.append('<div class="answer choice" data-answer-id="' + i +'"><div class="tick"></div>'+ answer.answer +'</div>');
        }

        questionContainer.find('.answers .answer').on('click',function() {
            $(this).toggleClass('active');
        });



    },

    init: function() {
        $('#hint-link').on('click',function() {
            if(window.lives > 0) {
                showHint(true);
            } else {
                alert("Du hast nicht genug Herzen, um einen Hinweis zur Hilfe anzeigen zu lassen.");
            }
        });
    }

});