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

/**
 * Set the PBV iframe URL with the location informations
 * @param {number} lat         The latitude value
 * @param {number} lng         The longitude value
 */
function setIframeUrlByLocation(lat, lng) {
	var iframeUrlWithLocation = iframeBaseUrl + '?userlat=' + lat + '&userlng=' + lng;

	checkActivitySharing(iframeUrlWithLocation);
}

/**
 * Retrieve the navigator position and set the iframe URL
 * @param {string} errorLocalisationMsg 	 Error message to display in navigator console if the location fails
 * @return {(Object.<string, number>)|false} The lat/lng coordinates or false if the navigator refused the access
 */
function getNavigatorLocation(errorLocalisationMsg) {
	navigator.geolocation.getCurrentPosition(
		function(pos) {
			var lat = pos.coords.latitude;
			var lng = pos.coords.longitude;

			setIframeUrlByLocation(lat, lng);
		},
		function(error) {
			createIframe(iframeBaseUrl);
			console.log(errorLocalisationMsg);
		}
	);
}

/**
 * Retrieve a parameter in the navigator URL
 * @param  {string} param The parameter label to retrieve
 * @return {string|null}  The parameter value or null if the parameter is not found
 */
function getURLParam(param) {
	var vars = {};
	window.location.href.replace(location.hash, '').replace(/[?&]+([^=&]+)=?([^&]*)?/gi,
		function(m, key, value) {
			vars[key] = value !== undefined ? value : '';
		}
	);

	if (param) {
		return vars[param] ? vars[param] : null;	
	}

	return vars;
}

/**
 * Check if the user comes from a sharing post and set the
 * URL params in the activity if that's the case
 * @param {string} iframeUrlWithLocation Iframe URL
 */
function checkActivitySharing(iframeUrlWithLocation) {
	var activityId = getURLParam('activityId');
	var lat = getURLParam('lat');
	var lng = getURLParam('lng');

	if (activityId !== null && lat !== null && lng !== null) {
		var iframeUrlWithActivity = iframeUrlWithLocation + '&activityId=' + activityId + '&lat=' + lat + '&lng=' + lng;
	} else {
		iframeUrlWithActivity = iframeUrlWithLocation;
	}
	createIframe(iframeUrlWithActivity);
}

/**
 * Create the app iframe 
 * @param {string} iframeUrl URL to set inside iframe element
 */
function createIframe(iframeUrl) {
	var iframeContainer = document.getElementById('iframe-container');

	var iframeElement = document.createElement('iframe');
	iframeElement.setAttribute('src', iframeUrl);
	iframeElement.setAttribute('id', pbvIframeId);
	iframeElement.setAttribute('style', 'display: none;');
	iframeElement.setAttribute('onload', 'hideLoadingMessage()');
	iframeContainer.appendChild(iframeElement);
}

/**
 * Hide the loading message in the parent app
 */
function hideLoadingMessage() {
	var messageContainer = document.getElementById('loading-msg');
	messageContainer.style.display = 'none';

	var ourIframe = document.getElementById(pbvIframeId);
	ourIframe.style.height = "100%";
	ourIframe.style.width = "100%";
	ourIframe.style.border = "none";
	ourIframe.style.display = 'block';
}

function fontSizeListener() {
	// IE6+ addEventListener Polyfill
	!function(a,n){function e(e){var t=n[e];n[e]=function(e){return r(t(e))}}function o(e,t,n){return(n=this).attachEvent("on"+e,function(e){(e=e||a.event).preventDefault=e.preventDefault||function(){e.returnValue=!1},e.stopPropagation=e.stopPropagation||function(){e.cancelBubble=!0},t.call(n,e)})}function r(e,t){if(t=e.length)for(;t--;)e[t].addEventListener=o;else e.addEventListener=o;return e}a.addEventListener||(r([n,a]),"Element"in a?a.Element.prototype.addEventListener=o:(n.attachEvent("onreadystatechange",function(){r(n.all)}),e("getElementsByTagName"),e("getElementById"),e("createElement"),r(n.all)))}(window,document);

	var increaseButton = document.getElementById(increaseButtonId);
	var decreaseButton = document.getElementById(decreaseButtonId);

	var listenerAction = function() {
		var currentFontSize = parseFloat(getComputedStyle(document.body)['font-size'], 10);
//		var fontValue = getCookie('text_resize');
		var fontValue = currentFontSize;
		if (fontValue !== '') {
			var iframe = document.getElementById(pbvIframeId);
			var currentUrl = iframe.getAttribute('src');
			var newUrl = currentUrl.split('#')[0] + '#fontsize' + Math.round(fontValue) + 'end';

			iframe.setAttribute('src', newUrl);
		}
	};

	increaseButton.addEventListener('click', listenerAction);
	decreaseButton.addEventListener('click', listenerAction);
}

// Settings the iframe id HTML attribut and processing iframe URL by "géolocalisation"
var iframeBaseUrl = "https://vabf-sipac-lot1.cnavts.fr/ppaspbvrs/ppaspbvcomponent";
var pbvIframeId = 'pbv-app-iframe';
var increaseButtonId = 'text_resize_increase';
var decreaseButtonId = 'text_resize_decrease';
var errorLocalisationMsg = 'La géolocalisation n’est pas activée sur le site Portail Bien Vieillir';

getNavigatorLocation(errorLocalisationMsg);
fontSizeListener();