var Photoclans = Photoclans || {};

Photoclans.BrowserUtil = function() {
};

// Browser info utility functions. Used by webmaster to analyse site usage data.

Photoclans.BrowserUtil.prototype.ScreenDimensions = function() {
	// we want to know how much space the webpate has to work with.
	// ideally the inner width/height size which is what's left over after browser toolbars/buttons
	// are displayed.

	var wid = "W?";
	var hgt = "H?";
	if (window.innerWidth) wid = window.innerWidth;
		else if (screen.width) wid = screen.width;

	if (window.innerHeight) hgt = window.innerHeight;
		else if (screen.height) hgt = screen.height;

	var dimens = wid + "x" + hgt;
	return dimens;
};

Photoclans.BrowserUtil.prototype.CookiesEnabled = function() {
	// check level of user paranoia
	var cookiesEnabled = "Unknown";
	if (navigator) cookiesEnabled = (navigator.cookieEnabled ? "On" : "Off");
	return cookiesEnabled;
}


Photoclans.BrowserUtil.prototype.BrowserDetection = function () {
    // Chrome 1+
	var base = "";
    var isChrome = !!window.chrome && !!window.chrome.webstore;


    // Opera 8.0+
    var isOpera = (!!window.opr && !!opr.addons) || !!window.opera || navigator.userAgent.indexOf(' OPR/') >= 0;

    // Blink engine detection
    var isBlink = (isChrome || isOpera) && !!window.CSS;

	if (isBlink) return "Blink-" + (isChrome ? "Chrome" : "Opera");
	if (isChrome) return "Chrome";
	if (isOpera ) return "Opera";


    // Safari 3.0+ "[object HTMLElementConstructor]" 
    var isSafari = /constructor/i.test(window.HTMLElement) || (function (p) { return p.toString() === "[object SafariRemoteNotification]"; })(!window['safari'] || safari.pushNotification);
	if (isSafari) return "Safari";

    // Internet Explorer 6-11
    var isIE = /*@cc_on!@*/false || !!document.documentMode;
	if (isIE ) return "Internet Explorer";

    // Firefox 1.0+
    var isFirefox = typeof InstallTrigger !== 'undefined';
	if (isFirefox ) return "FireFox";

    // Edge 20+
    var isEdge = !isIE && !!window.StyleMedia;
	if (isEdge) return "Edge";

	return "Unknown";
}

Photoclans.BrowserUtil.prototype.bsCheckbox = function(id, value) {
		var $checkbox = $("#" + id);
		if ($checkbox) {
			$checkbox.prop("checked", value);
			$checkbox.trigger("updateState");
		}
		else {
			console.log("bsCheckbox - failed to find " + id);
		}
		return false;
	}

Photoclans.BrowserUtil.prototype.bsSelect = function(id, value) {
	cuselSetValue("#" + id, value);
/*
var $select = $("#" + id);
		if ($select) {
			$select.prop("checked", value);
			$select.trigger("updateState");
		}
		else {
			console.log("bsCheckbox - failed to find " + id);
		}
--*/
	return false;
}

Photoclans.BrowserUtil.prototype.encodeHtmlText = function(value) {
		var outText = $('<div />').text(value).html();
		return outText;
	}

Photoclans.BrowserUtil.prototype.showErrors = function(preamble, errors) {
	var errorMessage = preamble + "\n\nError Message(s):\n";
	for(var idx in errors) {
		var error = errors[idx];
		errorMessage += error.message + "\n";
	}
	alert(errorMessage);
}


Photoclans.BrowserUtil.getUrlParameter = function(name) {
    name = name.replace(/[\[]/, '\\[').replace(/[\]]/, '\\]');
    var regex = new RegExp('[\\?&]' + name + '=([^&#]*)');
    var results = regex.exec(location.search);
    return results === null ? '' : decodeURIComponent(results[1].replace(/\+/g, ' '));
};

Photoclans.BrowserUtil.verifyImageLoad = function(img, retries) {
	// console.log("Verify: Attempts Left: " + retries + ", Image: " + img.id);
	var $img = $(img);
	if (img.nodeName == "IMG") {
//		if ($img.attr('data-retries')) {
//			retries = Math.max(0, $img.data('retries')-1);
//			console.log("verify " + img.id + " get attempts left: " + $img.data('retries') + ", and retries: " + retries);
//		}
//		$img.data('retries', retries);
		
		if (img.complete && (img.naturalWidth + img.naturalWidth) > 0) {
			// console.log("Verified: " + img.id);
			return true;
		}
		else {
			// console.log("Verify: " + img.id + ", failed, attempts Left: " + retries);
		}
	}
	else {
		// console.log("Invalid element: " + img.nodeName);
	}
	
	// else load failed -- retry in 2 seconds if we haven't run out of tries.
	if (retries > 0) {
		// console.log("verify " + img.id + " failed, attempts left: " + retries);
		
//		window.setTimeout(function() {
		//	console.log("verify " + img.id + " try reload, retry: " + retries);
			$(img).attr('src', img.src);
			window.setTimeout(function(){Photoclans.BrowserUtil.verifyImageLoad(img, retries-1);}, 1500);
//		},2000);
	}
	else {
		console.log("Photoclans.BrowserUtil.verifyImageLoad: out of retries");
	}
	return false;
}

/**
*
*  Base64 encode / decode
*  http://www.webtoolkit.info/
*
**/
 
Photoclans.BrowserUtil.Base64 = {
 
	// private property
	_keyStr : "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=",
 
	// public method for encoding
	encode : function (input) {
		var output = "";
		var chr1, chr2, chr3, enc1, enc2, enc3, enc4;
		var i = 0;
 
		input = Photoclans.BrowserUtil.Base64._utf8_encode(input);
 
		while (i < input.length) {
 
			chr1 = input.charCodeAt(i++);
			chr2 = input.charCodeAt(i++);
			chr3 = input.charCodeAt(i++);
 
			enc1 = chr1 >> 2;
			enc2 = ((chr1 & 3) << 4) | (chr2 >> 4);
			enc3 = ((chr2 & 15) << 2) | (chr3 >> 6);
			enc4 = chr3 & 63;
 
			if (isNaN(chr2)) {
				enc3 = enc4 = 64;
			} else if (isNaN(chr3)) {
				enc4 = 64;
			}
 
			output = output +
			this._keyStr.charAt(enc1) + this._keyStr.charAt(enc2) +
			this._keyStr.charAt(enc3) + this._keyStr.charAt(enc4);
 
		}
 
		return output;
	},
 
	// public method for decoding
	decode : function (input) {
		var output = "";
		var chr1, chr2, chr3;
		var enc1, enc2, enc3, enc4;
		var i = 0;
 
		input = input.replace(/[^A-Za-z0-9\+\/\=]/g, "");
 
		while (i < input.length) {
 
			enc1 = this._keyStr.indexOf(input.charAt(i++));
			enc2 = this._keyStr.indexOf(input.charAt(i++));
			enc3 = this._keyStr.indexOf(input.charAt(i++));
			enc4 = this._keyStr.indexOf(input.charAt(i++));
 
			chr1 = (enc1 << 2) | (enc2 >> 4);
			chr2 = ((enc2 & 15) << 4) | (enc3 >> 2);
			chr3 = ((enc3 & 3) << 6) | enc4;
 
			output = output + String.fromCharCode(chr1);
 
			if (enc3 != 64) {
				output = output + String.fromCharCode(chr2);
			}
			if (enc4 != 64) {
				output = output + String.fromCharCode(chr3);
			}
 
		}
 
		output = Photoclans.BrowserUtil.Base64._utf8_decode(output);
 
		return output;
 
	},
 
	// private method for UTF-8 encoding
	_utf8_encode : function (string) {
		string = string.replace(/\r\n/g,"\n");
		var utftext = "";
 
		for (var n = 0; n < string.length; n++) {
 
			var c = string.charCodeAt(n);
 
			if (c < 128) {
				utftext += String.fromCharCode(c);
			}
			else if((c > 127) && (c < 2048)) {
				utftext += String.fromCharCode((c >> 6) | 192);
				utftext += String.fromCharCode((c & 63) | 128);
			}
			else {
				utftext += String.fromCharCode((c >> 12) | 224);
				utftext += String.fromCharCode(((c >> 6) & 63) | 128);
				utftext += String.fromCharCode((c & 63) | 128);
			}
 
		}
 
		return utftext;
	},
 
	// private method for UTF-8 decoding
	_utf8_decode : function (utftext) {
		var string = "";
		var i = 0;
		var c = c1 = c2 = 0;
 
		while ( i < utftext.length ) {
 
			c = utftext.charCodeAt(i);
 
			if (c < 128) {
				string += String.fromCharCode(c);
				i++;
			}
			else if((c > 191) && (c < 224)) {
				c2 = utftext.charCodeAt(i+1);
				string += String.fromCharCode(((c & 31) << 6) | (c2 & 63));
				i += 2;
			}
			else {
				c2 = utftext.charCodeAt(i+1);
				c3 = utftext.charCodeAt(i+2);
				string += String.fromCharCode(((c & 15) << 12) | ((c2 & 63) << 6) | (c3 & 63));
				i += 3;
			}
 
		}
 
		return string;
	}
 
}

var pcBrowserUtil = new Photoclans.BrowserUtil();