/**
 * Main Grooveshark Script
 */
(function(){
	var gs = window.gs = {
		
		/* Global Variables */
		
		player: null,
		
		// logging variables
		DEBUG: true,
		fakeConsole: null,
		fakeConsoleBox: null,
		
		// model boxes
		lbFactory: null,
		
		// url info
		rootUrl : location.protocol + "//" + location.host,
		pageUrl : location.protocol + "//" + location.host + location.pathname,
		scriptUrl : location.href
		
	};
	
	
	gs.util = {
		/** The following functions are from
		 *  http://blogs.wdevs.com/Sukumar/archive/2005/05/10/3335.aspx
		 *
		 *  These functions are used to detect whether a variable meets certain conditions provided by the name of the function itself:
		 *      isUndefined - sees whether a variable is undefined
		 *      isNull - whether a variable is null
		 *      isIEObject - whether a variable is an object in IE
		 *      isObject -  whether a variable is an object
		 *      isFunction - whether a variable is a function
		 *      isArray - whether a variable is an array
		 *      isEmpty - whether a variable contains other members (applies to objects, functions, arrays)
		 *      isNumber - whether a variable is a number (NaN) and not infinite
		 *      isString - whether a variable is a string
		 *      isBoolean - whether a variable is a boolean
		 */
		isUndefined: function(a) { return typeof a == 'undefined'; },
		
		isNull: function(a) { return typeof a == 'object' && !a; },
		
		isIEObject: function(a) { return gs.util.isObject(a) && typeof a.constructor != 'function'; },
		
		isObject: function(a)
		{
		    if (a == null || a == undefined) return false;
		    return (typeof a == 'object' && !!a) || gs.util.isFunction(a);
		},
		
		isFunction: function(a) { return typeof a == 'function'; },
		
		isArray: function(a) { return gs.util.isObject(a) && a.constructor == Array; },
		
		isEmpty: function(o) {
		    if (gs.util.isObject(o)) {
		        for (var i in o) {
		            return false;
		        }
		    }
		    return true;
		},
		
		isNumber: function(a) { return typeof a == 'number' && isFinite(a); },
		
		isString: function(a) { return typeof a == 'string'; },
		
		isBoolean: function(a) { return typeof a == 'boolean'; },
		
		/**
		 * 	uses fisher-yates algorithm for randomly shuffle an array
		 */
		shuffle: function( myArray )
		{
			var i = myArray.length;
			if ( i == 0 ) return false;
			while ( --i ) {
				var j = Math.floor( Math.random() * ( i + 1 ) );
				var tempi = myArray[i];
				var tempj = myArray[j];
				myArray[i] = tempj;
				myArray[j] = tempi;
			}
			return myArray;
		},
		
		/**
		 * like the php function, makes sure the variable "arr" is an array
		 * formally: ensure_array
		 */
		arrayEnsure: function(arr)
		{
		    return (isArray(arr)) ? arr : [arr];
		},
		
		/** 
		 * give array of what you want replaced, and what you want to replace it with and the text you want to be changed
		 * formally: str_replace
		**/
		strReplace: function(search_arr, replace_str, subject)
		{
		    if(subject=="") return subject;
		    search_arr = arrayEnsure(search_arr);
		    replace_str = arrayEnsure(replace_str);
		    var length = search_arr.length;
		    for(var i=0; i<length; i++) {
		        subject = subject.replace(search_arr[i], replace_str[i]);
		    }
		    return subject;
		},
		
		/**
		 *	remove all children from a dom object
		 **/
		removeChildren: function(element)
		{
			if(!element) return;
		    var node;
		    while ((node = element.lastChild)) {
		        element.removeChild(node);
		    }
		},
		
		/**
		 * force browser to redraw a given element
		 * formally: obj_redraw
		 */
		objRedraw: function(obj)
		{
			obj = obj || document.body;
		    var t = obj.style.display;
		    obj.style.display = 'none';
		    obj.style.display = t;
		    obj.className += "";    // ensure safari redraws too
		},
		
		/**
		 * Returns {X,Y} coordinate position of DOM object
		 */
		get_position: function(doc_obj)
		{
			var left = 0;
			var top  = 0;
		
			while (doc_obj.offsetParent){
				left += doc_obj.offsetLeft;
				top  += doc_obj.offsetTop;
				doc_obj = doc_obj.offsetParent;
			}
		
			left += doc_obj.offsetLeft;
			top  += doc_obj.offsetTop;
		
			return {x:left, y:top};
		},
		
		/**
		 *  fix ie memory leak (http://javascript.crockford.com/memory/leak.html)
		 */
		purge: function(d)
		{
		    var a = d.attributes, i, l, n;
		    if (a) {
		        l = a.length;
		        for (i = 0; i < l; i += 1) {
		            n = a[i].name;
		            if (typeof d[n] === 'function') {
		                d[n] = null;
		            }
		        }
		    }
		    a = d.childNodes;
		    if (a) {
		        l = a.length;
		        for (i = 0; i < l; i += 1) {
		            gs.util.purge(d.childNodes[i]);
		        }
		    }
		},
		
		/**
		 * Get the position of the mouse and will place the mouse X and Y value to the corresponding parameters.
		 * formally: trackmouse
		 */
		getMouse: function(e)
		{
		    var posx =  posy = 0;
		    if (e.pageX || e.pageY) 	{
				posx = e.pageX;
				posy = e.pageY;
			} else if (e.clientX || e.clientY) 	{
				posx = e.clientX + document.body.scrollLeft
					+ document.documentElement.scrollLeft;
				posy = e.clientY + document.body.scrollTop
					+ document.documentElement.scrollTop;
			}
		    return {x:posx, y:posy};
		}
	};
	
	/**
	 * Standardized show event for all modal boxes
     */
    gs.modal_show = function(hash) {
        hash.w.show();
    }
    
    /**
     * Standardized hide event for all modal boxes
     */
    gs.modal_hide = function(hash) {
        hash.o.remove();
        hash.w.hide();
    }
    
    gs.copy = function(inElement) {
        if (!$.browser.opera && inElement.createTextRange) {
            var range = inElement.createTextRange();
            if (range && range.execCommand) {
                range.execCommand("Copy");
                //range.execCommand("copy");
            }
        } else {
            var flashcopier = "flashcopier";
            if (!document.getElementById(flashcopier)) {
                var divholder = document.createElement("div");
                divholder.id = flashcopier;
                document.body.appendChild(divholder);
            }
            document.getElementById(flashcopier).innerHTML = "";
            var divinfo = "<embed src=\"_clipboard.swf\" FlashVars=\"clipboard=" + escape(inElement.value) + "\" width=\"0\" height=\"0\" type=\"application/x-shockwave-flash\"></embed>";
            document.getElementById(flashcopier).innerHTML = divinfo;
        }
    }
    
	/**
	 *  Extends the array object to have the "indexOf" and "inArray" methods
	 */
	if(!Array.prototype.indexOf) {
	    Array.prototype.indexOf = function(val) {
	        for (var n = 0; n < this.length; n++) {
	            if (this[n] == val) {
	                return n;
	            }
	        }
	        return -1;
	    }
	}
	if(!Array.prototype.inArray) {
	    Array.prototype.inArray = function (value) {
	        for (var i=0; i < this.length; i++) {
	            if (this[i] === value) {
	                return true;
	            }
	        }
	        return false;
	    }
	}
	
	/**
	 * Extend jQuery to add some custom functions
	 */
	$.extend({
		/**  
		 * Post information to server and ensure json return data
		 */
	    postJSON: function( url, data, callback ) {
	            return $.post(url, data, callback, "json");
	    },
	    
	    /**
	     * Standard forms funcionality
	     * formally show_messages
	     */
	    showMessages: function()
		{
		    var text = $("p#messages_text").html();
		    if (text != '') {
		        $("div#messages").show();
		    }
		    return this;
		},
		
		/**
	     * Standard forms funcionality
	     * formally show_alert
	     */
		showAlert: function()
		{
		    var text = $("p#alert_text").html();
		    if (text != '') {
		        $("div#alert").show();
		    }
		    return this;
		},
	    
	    /**
	     * Retrieve dom object from jQuery's function chaining
	     */
	    dom: function(getAll) {
	    	getAll = getAll || false;
	    	if(getAll) {
	    		var d = [];
	    		$(this).each(function() {
	    			d.push(this);
	    		});
	    		return d;
	    	}
			return this[0];
		},
		
		/**
		 * Change the way jQuery displays dragged objects
		 */
		fixDrag: function() {
			var dragtype = ($(this).attr("id")).split("_")[0];
		    if(dragtype=="sid" || dragtype=="lib" || dragtype=="ssid") {
		        if(isIE) {
		            var ieobj = document.getElementById($(this).attr("id"));
		            var helper = document.getElementById("dragHelper");
		            helper.innerHTML="<table><tr>"+ieobj.innerHTML+"</tr></table>";
		            var arr = $("td",helper).children();
		        } else {
		            var arr = $("td",this).children();
		        }
		        
		        var arr_length = arr.length;
		        $(arr[1]).width(180+"px");
		        $(arr[2]).width(180+"px");
		        $(arr[3]).width(180+"px");
		        $(arr[0]).remove();
		        $(arr[arr_length-1]).remove();
		        $(arr[arr_length-2]).remove();
				
		        $("#dragHelper").width(540+"px").css("opacity",.75);
		        $(this).children().children().children(".ellipses").remove();
		        $(this).css("background","#FFFFFF").css("color","#294251");
		    }
		    return this;
		}
	});
	
	//ie6 flicker bug-fix
	if (isIE6) {
		try {
			document.execCommand("BackgroundImageCache", false, true);
		} catch(e) {}
	}
	
	$(document).ready(function() {
		gs.lbFactory = new ModalBoxFactory();
	});
	
})();