/* global $, interfaceConfig */

/*
 * Created by Yana Stamcheva on 2/10/15.
 */
var messageHandler = require("./util/MessageHandler");
var callStats = require("../statistics/CallStats");
var APP = require("../../app");

/**
 * Constructs the html for the overall feedback window.
 *
 * @returns {string} the constructed html string
 */
var constructOverallFeedbackHtml = function() {
    var feedbackQuestion = (Feedback.feedbackScore < 0)
        ? '<br/><br/>' + APP.translation
        .translateString("dialog.feedbackQuestion")
        : '';

    var message = '<div class="feedback"><div>' +
        '<div class="feedbackTitle">' +
        APP.translation.translateString("dialog.thankYou",
                                        {appName:interfaceConfig.APP_NAME}) +
        '</div>' +
        feedbackQuestion +
        '</div><br/><br/>' +
        '<div id="stars">' +
        '<a><i class="fa fa-star-o fa fa-star"></i></a>' +
        '<a><i class="fa fa-star-o fa fa-star"></i></a>' +
        '<a><i class="fa fa-star-o fa fa-star"></i></a>' +
        '<a><i class="fa fa-star-o fa fa-star"></i></a>' +
        '<a><i class="fa fa-star-o fa fa-star"></i></a>' +
        '</div></div>';

    return message;
};

/**
 * Constructs the html for the detailed feedback window.
 *
 * @returns {string} the contructed html string
 */
var constructDetailedFeedbackHtml = function() {
    // Construct the html, which will be served as a dialog message.
    var message = '<div class="feedback">' +
        '<div class="feedbackTitle">' +
        APP.translation.translateString("dialog.sorryFeedback") +
        '</div><br/><br/>' +
        '<div class="feedbackDetails">' +
        '<textarea id="feedbackTextArea" rows="10" cols="50" autofocus>' +
        '</textarea>' +
        '</div></div>';

    return message;
};

/**
 * The callback function corresponding to the openFeedbackWindow parameter.
 *
 * @type {function}
 */
var feedbackWindowCallback = null;

/**
 * Defines all methods in connection to the Feedback window.
 *
 * @type {{feedbackScore: number, openFeedbackWindow: Function,
 * toggleStars: Function, hoverStars: Function, unhoverStars: Function}}
 */
var Feedback = {
    /**
     * The feedback score. -1 indicates no score has been given for now.
     */
    feedbackScore: -1,
    /**
     * Opens the feedback window.
     */
    openFeedbackWindow: function (callback) {
        feedbackWindowCallback = callback;
        // Add all mouse and click listeners.
        var onLoadFunction = function (event) {
            $('#stars >a').each(function(index) {
                // On star mouse over.
                $(this).get(0).onmouseover = function(){
                    Feedback.hoverStars(index);
                };
                // On star mouse leave.
                $(this).get(0).onmouseleave = function(){
                    Feedback.unhoverStars(index);
                };
                // On star click.
                $(this).get(0).onclick = function(){
                    Feedback.toggleStars(index);
                    Feedback.feedbackScore = index+1;

                    // If the feedback is less than 3 stars we're going to
                    // ask the user for more information.
                    if (Feedback.feedbackScore > 3) {
                        callStats.sendFeedback(Feedback.feedbackScore, "");
                        if (feedbackWindowCallback)
                            feedbackWindowCallback();
                        else
                            APP.UI.messageHandler.closeDialog();
                    }
                    else {
                        feedbackDialog.goToState('detailed_feedback');
                    }
                };
                // Init stars to correspond to previously entered feedback.
                if (Feedback.feedbackScore > 0
                    && index < Feedback.feedbackScore) {
                    Feedback.hoverStars(index);
                    Feedback.toggleStars(index);
                }
            });
        };

        // Defines the different states of the feedback window.
        var states = {
            overall_feedback: {
                html: constructOverallFeedbackHtml(),
                persistent: true,
                buttons: {},
                closeText: '',
                focus: "div[id='stars']",
                position: {width: 500}
            },
            detailed_feedback: {
                html: constructDetailedFeedbackHtml(),
                buttons: {"Submit": true, "Cancel": false},
                closeText: '',
                focus: "textarea[id='feedbackTextArea']",
                position: {width: 500},
                submit: function(e,v,m,f) {
                    e.preventDefault();
                    if (v) {
                        var feedbackDetails
                            = document.getElementById("feedbackTextArea").value;

                        if (feedbackDetails && feedbackDetails.length > 0)
                            callStats.sendFeedback( Feedback.feedbackScore,
                                                    feedbackDetails);

                        if (feedbackWindowCallback)
                            feedbackWindowCallback();
                        else
                            APP.UI.messageHandler.closeDialog();
                    } else {
                        // User cancelled
                        if (feedbackWindowCallback)
                            feedbackWindowCallback();
                        else
                            APP.UI.messageHandler.closeDialog();
                    }
                }
            }
        };

        // Create the feedback dialog.
        var feedbackDialog
            = APP.UI.messageHandler.openDialogWithStates(
                states,
                {   persistent: true,
                    buttons: {},
                    closeText: '',
                    loaded: onLoadFunction,
                    position: {width: 500}}, null);
    },
    /**
     * Toggles the appropriate css class for the given number of stars, to
     * indicate that those stars have been clicked/selected.
     *
     * @param starCount the number of stars, for which to toggle the css class
     */
    toggleStars: function (starCount)
    {
        $('#stars >a >i').each(function(index) {
            if (index <= starCount) {
                $(this).removeClass("fa-star-o");
            }
            else
                $(this).addClass("fa-star-o");
        });
    },
    /**
     * Toggles the appropriate css class for the given number of stars, to
     * indicate that those stars have been hovered.
     *
     * @param starCount the number of stars, for which to toggle the css class
     */
    hoverStars: function (starCount)
    {
        $('#stars >a >i').each(function(index) {
            if (index <= starCount)
                $(this).addClass("starHover");
        });
    },
    /**
     * Toggles the appropriate css class for the given number of stars, to
     * indicate that those stars have been un-hovered.
     *
     * @param starCount the number of stars, for which to toggle the css class
     */
    unhoverStars: function (starCount)
    {
        $('#stars >a >i').each(function(index) {
            if (index <= starCount && $(this).hasClass("fa-star-o"))
                $(this).removeClass("starHover");
        });
    }
};

// Exports the Feedback class.
module.exports = Feedback;