/*
 * Memokado module
 * Copyright 2009 ThePresentFriend. All Rights Reserved.
 */

/*
    http://www.JSON.org/json2.js
    2009-09-29
*/
/*jslint evil: true, strict: false */
/*members "", "\b", "\t", "\n", "\f", "\r", "\"", JSON, "\\", apply,
    call, charCodeAt, getUTCDate, getUTCFullYear, getUTCHours,
    getUTCMinutes, getUTCMonth, getUTCSeconds, hasOwnProperty, join,
    lastIndex, length, parse, prototype, push, replace, slice, stringify,
    test, toJSON, toString, valueOf
*/



if (!this.JSON) {
    this.JSON = {};
}

(function () {

    function f(n) {
        // Format integers to have at least two digits.
        return n < 10 ? '0' + n : n;
    }

    if (typeof Date.prototype.toJSON !== 'function') {

        Date.prototype.toJSON = function (key) {

            return isFinite(this.valueOf()) ?
                   this.getUTCFullYear()   + '-' +
                 f(this.getUTCMonth() + 1) + '-' +
                 f(this.getUTCDate())      + 'T' +
                 f(this.getUTCHours())     + ':' +
                 f(this.getUTCMinutes())   + ':' +
                 f(this.getUTCSeconds())   + 'Z' : null;
        };

        String.prototype.toJSON =
        Number.prototype.toJSON =
        Boolean.prototype.toJSON = function (key) {
            return this.valueOf();
        };
    }

    var cx = /[\u0000\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g,
        escapable = /[\\\"\x00-\x1f\x7f-\x9f\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g,
        gap,
        indent,
        meta = {    // table of character substitutions
            '\b': '\\b',
            '\t': '\\t',
            '\n': '\\n',
            '\f': '\\f',
            '\r': '\\r',
            '"' : '\\"',
            '\\': '\\\\'
        },
        rep;


    function quote(string) {

// If the string contains no control characters, no quote characters, and no
// backslash characters, then we can safely slap some quotes around it.
// Otherwise we must also replace the offending characters with safe escape
// sequences.

        escapable.lastIndex = 0;
        return escapable.test(string) ?
            '"' + string.replace(escapable, function (a) {
                var c = meta[a];
                return typeof c === 'string' ? c :
                    '\\u' + ('0000' + a.charCodeAt(0).toString(16)).slice(-4);
            }) + '"' :
            '"' + string + '"';
    }


    function str(key, holder) {

// Produce a string from holder[key].

        var i,          // The loop counter.
            k,          // The member key.
            v,          // The member value.
            length,
            mind = gap,
            partial,
            value = holder[key];

// If the value has a toJSON method, call it to obtain a replacement value.

        if (value && typeof value === 'object' &&
                typeof value.toJSON === 'function') {
            value = value.toJSON(key);
        }

// If we were called with a replacer function, then call the replacer to
// obtain a replacement value.

        if (typeof rep === 'function') {
            value = rep.call(holder, key, value);
        }

// What happens next depends on the value's type.

        switch (typeof value) {
        case 'string':
            return quote(value);

        case 'number':

// JSON numbers must be finite. Encode non-finite numbers as null.

            return isFinite(value) ? String(value) : 'null';

        case 'boolean':
        case 'null':

// If the value is a boolean or null, convert it to a string. Note:
// typeof null does not produce 'null'. The case is included here in
// the remote chance that this gets fixed someday.

            return String(value);

// If the type is 'object', we might be dealing with an object or an array or
// null.

        case 'object':

// Due to a specification blunder in ECMAScript, typeof null is 'object',
// so watch out for that case.

            if (!value) {
                return 'null';
            }

// Make an array to hold the partial results of stringifying this object value.

            gap += indent;
            partial = [];

// Is the value an array?

            if (Object.prototype.toString.apply(value) === '[object Array]') {

// The value is an array. Stringify every element. Use null as a placeholder
// for non-JSON values.

                length = value.length;
                for (i = 0; i < length; i += 1) {
                    partial[i] = str(i, value) || 'null';
                }

// Join all of the elements together, separated with commas, and wrap them in
// brackets.

                v = partial.length === 0 ? '[]' :
                    gap ? '[\n' + gap +
                            partial.join(',\n' + gap) + '\n' +
                                mind + ']' :
                          '[' + partial.join(',') + ']';
                gap = mind;
                return v;
            }

// If the replacer is an array, use it to select the members to be stringified.

            if (rep && typeof rep === 'object') {
                length = rep.length;
                for (i = 0; i < length; i += 1) {
                    k = rep[i];
                    if (typeof k === 'string') {
                        v = str(k, value);
                        if (v) {
                            partial.push(quote(k) + (gap ? ': ' : ':') + v);
                        }
                    }
                }
            } else {

// Otherwise, iterate through all of the keys in the object.

                for (k in value) {
                    if (Object.hasOwnProperty.call(value, k)) {
                        v = str(k, value);
                        if (v) {
                            partial.push(quote(k) + (gap ? ': ' : ':') + v);
                        }
                    }
                }
            }

// Join all of the member texts together, separated with commas,
// and wrap them in braces.

            v = partial.length === 0 ? '{}' :
                gap ? '{\n' + gap + partial.join(',\n' + gap) + '\n' +
                        mind + '}' : '{' + partial.join(',') + '}';
            gap = mind;
            return v;
        }
    }

// If the JSON object does not yet have a stringify method, give it one.

    if (typeof JSON.stringify !== 'function') {
        JSON.stringify = function (value, replacer, space) {

// The stringify method takes a value and an optional replacer, and an optional
// space parameter, and returns a JSON text. The replacer can be a function
// that can replace values, or an array of strings that will select the keys.
// A default replacer method can be provided. Use of the space parameter can
// produce text that is more easily readable.

            var i;
            gap = '';
            indent = '';

// If the space parameter is a number, make an indent string containing that
// many spaces.

            if (typeof space === 'number') {
                for (i = 0; i < space; i += 1) {
                    indent += ' ';
                }

// If the space parameter is a string, it will be used as the indent string.

            } else if (typeof space === 'string') {
                indent = space;
            }

// If there is a replacer, it must be a function or an array.
// Otherwise, throw an error.

            rep = replacer;
            if (replacer && typeof replacer !== 'function' &&
                    (typeof replacer !== 'object' ||
                     typeof replacer.length !== 'number')) {
                throw new Error('JSON.stringify');
            }

// Make a fake root object containing our value under the key of ''.
// Return the result of stringifying the value.

            return str('', {'': value});
        };
    }


// If the JSON object does not yet have a parse method, give it one.

    if (typeof JSON.parse !== 'function') {
        JSON.parse = function (text, reviver) {

// The parse method takes a text and an optional reviver function, and returns
// a JavaScript value if the text is a valid JSON text.

            var j;

            function walk(holder, key) {

// The walk method is used to recursively walk the resulting structure so
// that modifications can be made.

                var k, v, value = holder[key];
                if (value && typeof value === 'object') {
                    for (k in value) {
                        if (Object.hasOwnProperty.call(value, k)) {
                            v = walk(value, k);
                            if (v !== undefined) {
                                value[k] = v;
                            } else {
                                delete value[k];
                            }
                        }
                    }
                }
                return reviver.call(holder, key, value);
            }


// Parsing happens in four stages. In the first stage, we replace certain
// Unicode characters with escape sequences. JavaScript handles many characters
// incorrectly, either silently deleting them, or treating them as line endings.

            cx.lastIndex = 0;
            if (cx.test(text)) {
                text = text.replace(cx, function (a) {
                    return '\\u' +
                        ('0000' + a.charCodeAt(0).toString(16)).slice(-4);
                });
            }

// In the second stage, we run the text against regular expressions that look
// for non-JSON patterns. We are especially concerned with '()' and 'new'
// because they can cause invocation, and '=' because it can cause mutation.
// But just to be safe, we want to reject all unexpected forms.

// We split the second stage into 4 regexp operations in order to work around
// crippling inefficiencies in IE's and Safari's regexp engines. First we
// replace the JSON backslash pairs with '@' (a non-JSON character). Second, we
// replace all simple value tokens with ']' characters. Third, we delete all
// open brackets that follow a colon or comma or that begin the text. Finally,
// we look to see that the remaining characters are only whitespace or ']' or
// ',' or ':' or '{' or '}'. If that is so, then the text is safe for eval.

            if (/^[\],:{}\s]*$/.
test(text.replace(/\\(?:["\\\/bfnrt]|u[0-9a-fA-F]{4})/g, '@').
replace(/"[^"\\\n\r]*"|true|false|null|-?\d+(?:\.\d*)?(?:[eE][+\-]?\d+)?/g, ']').
replace(/(?:^|:|,)(?:\s*\[)+/g, ''))) {

// In the third stage we use the eval function to compile the text into a
// JavaScript structure. The '{' operator is subject to a syntactic ambiguity
// in JavaScript: it can begin a block or an object literal. We wrap the text
// in parens to eliminate the ambiguity.

                j = eval('(' + text + ')');

// In the optional fourth stage, we recursively walk the new structure, passing
// each name/value pair to a reviver function for possible transformation.

                return typeof reviver === 'function' ?
                    walk({'': j}, '') : j;
            }

// If the text is not JSON parseable, then a SyntaxError is thrown.

            throw new SyntaxError('JSON.parse');
        };
    }
}());


// Avoid reloading of script
var Memokado;
if (!this.Memokado) {
    // Memokado singleton and namespace
    Memokado = function () {
	// http://www.webtoolkit.info/javascript-base64.html
	var Base64 = {
	    _keyStr : "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=",
	    encode : function (input) {
		var output = "";
		var chr1, chr2, chr3, enc1, enc2, enc3, enc4;
		var i = 0;
		input = 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;
	    },
	    
	    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 = Base64._utf8_decode(output);
		return output;
	    },
	    
	    _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;
	    },
	    
	    _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 HOST = (document.domain.indexOf("localhost.com") > -1 ? "localhost.com:3000/" : "memokado.eu/");
	// Constants
	var TIMEOUT = 600,
	MASCOT_HOST = "http://mascot." + HOST,
	APPLI_HOST = "http://" + HOST,
	WINDOW_WIDTH = 320,
	WINDOW_HEIGHT = 200;
	var caller,
	bookmarkWindow,
	timeoutId,
	catalog,
	uid;

	function crossBrowserAddEvent(obj, type, fn){
	    if(obj.addEventListener){
		obj.addEventListener( type, fn, false );
	    } else if(obj.attachEvent){ /*IE*/
		obj["e"+type+fn] = fn;
		obj[type+fn] = function() { obj["e"+type+fn]( window.event ); }
		obj.attachEvent( "on"+type, obj[type+fn] );
	    }
	}

	function attachMouseEvents(){
	    links = document.getElementsByTagName("a");	
	    for(var i = 0, len = links.length; i < len; ++i){
		var onclickAttr = links[i].attributes['onclick']
		if(onclickAttr && onclickAttr.nodeValue && onclickAttr.nodeValue.indexOf("Memokado.bookmark") != -1){
		    // Set the links to a relative position because the popup image will be set to absolute.
		    links[i].style.position = "relative";
		    crossBrowserAddEvent(links[i], 'mouseout', function(){Memokado.mouseout(this)});
		    crossBrowserAddEvent(links[i], 'mouseover', function(){Memokado.mouseover(this)});
		}
	    }
	}

	function getCatalog(){
	    var catalog = "";

	    var	allScripts = document.getElementsByTagName("script"),
		lastScript=allScripts[allScripts.length-1];
	    if(lastScript){
		var query = lastScript.src.split("?")[1],
		    params = parseQuery(query);
	    }
	    if(params){
		catalog = params.catalog;
	    }

	    return catalog;
	}

	function parseQuery(q){
	    var params = {};
	    if(q==undefined){
		q = location.search ? location.search : "";
	    }
	    if(q.charAt(0) == "?"){
		q = q.substring(1);
	    }
	    q = q.replace("+"," ");
	    var d = q.split(/[&;]/g);
	    for(var i = 0; i < d.length; i++){
		var f = d[i].split("=");
		var key = decodeURIComponent(f[0]);
		var val = decodeURIComponent(f[1]);
		params[key]=val;
	    }
	    return params
	}

	function FindXY(obj){
	    // TODO offsetTop-scrollTop is dilated when Safari is zoomed
	    var x = 0,y = 0;
	    // With safari, we don't consider the img object because it returns wrong values when in a relative position
	    if(navigator.userAgent.indexOf("Safari")){
		obj = obj.offsetParent;
	    }
	    while(obj != null){
		x += obj.offsetLeft - obj.scrollLeft;
		y += obj.offsetTop - obj.scrollTop;
		obj = obj.offsetParent;
	    }
	    return { x: x, y: y };
	}

	function getReferrer(){
	    var ref = "";
	    try{
		ref = top.document.referrer;
	    }catch(exc){
		if(parent){
		    try {
			ref = parent.document.referrer;
		    }catch(exc2){
			ref = "";
		    }
		}
	    }
	    if(ref === ""){
		ref = document.referrer;
	    }
	    return ref;
	}

	function checkComesFromMemokado() {
	    var	params = parseQuery(),
	    ref = getReferrer(),
	    mmkd = params["mmkd"];
	    if ( mmkd || ref.indexOf('memokado.eu') > -1 || ref.indexOf('memoriser-idee-cadeau.com') > -1) {
		setCookie("mmkd_from", "true", 30);
		if ( mmkd ) {
		    mmkdObject = JSON.parse(Base64.decode(mmkd));
		    setCookie("mmkd_u", mmkdObject.user_id, 30)
		}
	    }
	}

	function readUid() {
	    return getCookie("mmkd_u", "");
	}

	function setCookie(name, value, days) {
	    var expiryDate;
	    if (days) {
		expiryDate = new Date();
		expiryDate.setTime(expiryDate.getTime() + days * 1000*60*60*24);
	    }
	    document.cookie = name + '=' + escape(value) +
	    (days ? ';expires=' + expiryDate.toGMTString() : '') +
	    ';path=/';
	}
	
	function getCookie(name, defaultValue) {
	    var regex = new RegExp(name + "s*=s*(.*?)(;|$)");
	    var cookies = document.cookie.toString();
	    var match = cookies.match(regex);
	    if(match)
		return unescape(match[1]);
	    
	    return defaultValue;
	}

	function getDescImage(link) {
	    var image = undefined,
	        images = link.getElementsByTagName('img');
	    if ( images.length >= 2 ) {
		image = images[1];
	    } else if ( images.length >= 1 && images[0].indexOf('/mascot/desc') != -1  ) {
		image = images[0];
	    }
	    return image;
	}

	function Tracker() {
	    var order;

	    var Item = function(sku, price, quantity) {
		this.sku = sku;
		this.price = price;
		this.quantity = quantity;
	    }

	    var Order = function(merchant_order, total) {
		this.merchant_order = merchant_order;
		this.total = total;
		this.items = new Array();
		this.confirmed = true;
		this.addItem = function(sku, price, quantity) {
		    var i = this.items.length;
		    this.items[i] = new Item(sku, price, quantity);
		}
		this.toJson = function(catalog_id, user_id) {
		    this.catalog_id = catalog_id;
		    this.user_id = user_id;
		    return JSON.stringify(this);
		}
	    }
	    
	    function httpGet(url) {
		var img = new Image(1,1);
		img.onLoad = function(){};
		img.src = url;
	    }


	    // Constructor

	    // Public data and methods
	    return {
		// Returns true if the user arrived to the merchant site
		// thanks to memokado during the last 30 days
		fromMemokado: function () {
		    var mmkd = getCookie("mmkd_from", "false")
		    return mmkd == "true";
		},
	        addTrans: function (merchant_order, total) {
		    order = new Order(merchant_order, total);
	        },
	        addItem: function (merchant_order, sku, price, quantity) {
		    if(order == undefined || order.merchant_order != merchant_order) {
			order = new Order(merchant_order, "");
		    }
		    order.addItem(sku, price, quantity);
	        },
		setConfirmed: function (confirmed) {
		    if (order) {
			order.confirmed = confirmed;
		    }
		},
	        trackTrans: function() {
		    if (order) {
			httpGet(APPLI_HOST + 'track?order='+escape(Base64.encode(order.toJson(catalog, uid))));
		    }
	        }
     	    };

	}

	// Constructors
	attachMouseEvents();
	catalog = getCatalog();
	checkComesFromMemokado();
	uid = readUid();

	// Public
	return {
	    bookmark: function (event, sku) {
		var element = event.target || event.srcElement/*IE*/;
		clearTimeout ( this.timeoutId );// cancel the mouseover event when the mouseover popup didn't appear yet
		var posCaller = FindXY(element);
		var posBrowser = { x: event.screenX - event.clientX,
				   y: event.screenY - event.clientY };
		var left = posBrowser.x + posCaller.x + 20;
		var topShift = navigator.userAgent.indexOf("Safari") == -1 ? 90 : 40;
		var top = posBrowser.y + posCaller.y - WINDOW_HEIGHT - topShift;
		if (bookmarkWindow != null) {
		    bookmarkWindow.close();
		}
		bookmarkWindow = window.open(MASCOT_HOST +'bookmark?catalog_id=' + catalog
			    + '&sku=' + encodeURIComponent(sku)
			    + '&url=' + encodeURIComponent(location.href),
			    'memokado_popup',
			    'height=' + WINDOW_HEIGHT
			    + ',width=' + WINDOW_WIDTH
			    + ',left=' + left
			    + ',top=' + top
			    + ',toolbar=no,status=no,scrollbars=yes,resizable=yes');
	    },

	    mouseover : function(caller) {
		this.caller = caller;
		this.timeoutId = setTimeout ( "Memokado.popup();", TIMEOUT );
	    },

	    popup: function () {
		var img = getDescImage(this.caller);
		if ( img ) {
		    img.style.width = "300px";
		    img.style.height = "164px";
		    img.style.position = "absolute";
		    img.style.left = "20px";
		    img.style.bottom = navigator.userAgent.indexOf("MSIE") == -1 ? "25px" : "25px";
		}
	    },

	    mouseout: function (caller) {
		clearTimeout ( this.timeoutId );
		var img = getDescImage(caller);
		if ( img ) {
		    img.style.width = "0";
		    img.style.height = "0";
		}
	    },
	    
	    getTracker: function () {
		return new Tracker();
	    }

	};
    }();
}