var YA_COOKIE_PLATFORM  = "ya_web_platform";

function ya_createCookie(name,value, hours) {
    var date = new Date();
    date.setTime(date.getTime()+(hours*60*60*1000));
    var expires = "; expires="+date.toGMTString();

    document.cookie = name+"="+value+expires+"; path=/";
}

function ya_readCookie(name) {
    var nameEQ = name + "=";
    var ca = document.cookie.split(';');
    for(var i=0;i < ca.length;i++) {
        var c = ca[i];
        while (c.charAt(0)==' ') c = c.substring(1,c.length);
        if (c.indexOf(nameEQ) == 0)
          return c.substring(nameEQ.length,c.length);
    }
    return null;
}

var YOUAPPI_PREFIX = "youappi";

var YA_COOKIE_USER_TOKEN  = "ya_user_token";

var yaWidgets = [];
var yaTimerID = 0;

var yaUserStatus = 0;

var youAPPiWidget = {
    baseURL: "//track.56txs4.com",
    widgetToken: "3779956d-e8c2-4521-8360-96f55e5b9f3f",
    publisherToken: "",
    userToken: "",
    templateToken: "",
    styleToken: "",
    placementsCount: 0,
    width: "300",
    height: "300",
    creativeSize: "",
    containerID: YOUAPPI_PREFIX + "_widget_container",
    overridePlatform: "",
    extraParams: "",
    subid: "",
    subid2: "",
    subid3: "",
    subid4: "",
    subid5: "",
    create: create
}

if (typeof jQuery == 'undefined') {
    document.write("<script src='//ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js' type='text/javascript'></script>");

    if (typeof $ != 'undefined') {
        document.write("<script type='text/javascript'>jQuery.noConflict();</script>");
    }
}

function create() {
    createWidget();

    if (yaTimerID == 0) {
      yaTimerID = setInterval("checkVisible()", 1000 * 1);
    }
}

function createWidget() {
    var url = youAPPiWidget.baseURL + "/widget/generate/?widgettoken=" + youAPPiWidget.widgetToken;

    figureUserToken();

    url = addIfNotEmpty(url, "publishertoken", youAPPiWidget.publisherToken);
    url = addIfNotEmpty(url, "usertoken", youAPPiWidget.userToken);

    url = addIfNotEmpty(url, "templatetoken", youAPPiWidget.templateToken);
    url = addIfNotEmpty(url, "styletoken", youAPPiWidget.styleToken);

    // Check if user has a platform cookie
    if (youAPPiWidget.overridePlatform.length == 0) {
        var cookiePlatform = ya_readCookie(YA_COOKIE_PLATFORM);

        if (cookiePlatform != null && cookiePlatform.length > 0) {
            youAPPiWidget.overridePlatform  = cookiePlatform;
        }
    }

    url = addIfNotEmpty(url, "overrideplatform", youAPPiWidget.overridePlatform);
    url += "&userStatus=" + yaUserStatus;

    if (youAPPiWidget.extraParams.length > 0)
      url += "&" + youAPPiWidget.extraParams;

    if (youAPPiWidget.placementsCount > 0)
        url += "&placementscount=" + youAPPiWidget.placementsCount;

    url = addIfNotEmpty(url, "creativeSize", youAPPiWidget.creativeSize);

    // Sub IDs
    url = addIfNotEmpty(url, "subid", youAPPiWidget.subid);
    url = addIfNotEmpty(url, "subid2", youAPPiWidget.subid2);
    url = addIfNotEmpty(url, "subid3", youAPPiWidget.subid3);
    url = addIfNotEmpty(url, "subid4", youAPPiWidget.subid4);
    url = addIfNotEmpty(url, "subid5", youAPPiWidget.subid5);

    // Timestamp
    url += "&ts=" + new Date().getTime();

    // Extra params
    url += "&" + "widgetToken=3779956d-e8c2-4521-8360-96f55e5b9f3f&webSiteURL=http%3A%2F%2Fsmartstore.youappi.com%2Fresources%2Flinks%2Fshow_widget.jsp%3FwidgetToken%3Dnut_aw_a33a00L2Vd8v7Iu4WucIIbhJ2H11r5643&webSiteName=More apps >&showButton=yes&showRating=yes";

    // Width stuff
    if (youAPPiWidget.width == 'auto') {
        youAPPiWidget.width = jQuery(window).width();
    }

    var html = "<iframe scrolling='no' frameborder='0' class='" + YOUAPPI_PREFIX + "_widget_iframe' allowtransparency='true' width='" + youAPPiWidget.width + "' height='" + youAPPiWidget.height + "' src='" + url + "'></iframe>";

    jQuery(getWidgetContainerID()).html(html);

    yaWidgets.push(getWidgetContainerID());
}

function figureUserToken() {
    // Publisher passed
    yaUserStatus = 0;

    var cookieUT = ya_readCookie(YA_COOKIE_USER_TOKEN);

    if (cookieUT != null && cookieUT.length >0) {
        // Found in cookie
        yaUserStatus = 1;

        if (youAPPiWidget.userToken.length == 0) {
          youAPPiWidget.userToken = cookieUT;

        } else {
          // Conflict?
          if (youAPPiWidget.userToken != cookieUT)
            yaUserStatus = 2;
        }
    }

    if (youAPPiWidget.userToken.length == 0) {
        youAPPiWidget.userToken = new Date().getTime() + "_" + Math.floor(Math.random()* 100000000);

        // Generated
        yaUserStatus = 3;
    }

    ya_createCookie(YA_COOKIE_USER_TOKEN, youAPPiWidget.userToken, 24 * 365 * 40);
}

function addIfNotEmpty(url, paramName, paramValue) {
    if (paramValue.length > 0)
        url += "&" + paramName + "=" + paramValue;

    return url;
}

function getWidgetContainerID() {
    return "#" + youAPPiWidget.containerID;
}

function checkVisible() {
    for (i = 0; i < yaWidgets.length; i++) {
        var currentID = yaWidgets[i];

        if (isElementVisible(jQuery(currentID))) {
            signalVisible(currentID);
        }
    }
}

function signalVisible(currentID) {
    var win = jQuery(currentID + " iframe")[0].contentWindow;

    win.postMessage(YOUAPPI_PREFIX + "_impression", "*");
}

function isElementVisible($element) {
    var winTop = jQuery(window).scrollTop();
    var winBottom = winTop + window.innerHeight;

    var elemTop = $element.offset().top;
    var elemBottom = elemTop + $element.height();

    if ((elemTop >= winTop) && (elemTop <= winBottom))
        return true;

    if ((elemBottom >= winTop) && (elemBottom <= winBottom))
        return true;

    // Check middle
    if ((elemTop < winTop) && (elemBottom > winBottom))
        return true;

    return false;
}