/**
	The MIT License

	Copyright (c) 2009 Chris Nizzardini www.cnizz.com
	
	Permission is hereby granted, free of charge, to any person obtaining a copy
	of this software and associated documentation files (the "Software"), to deal
	in the Software without restriction, including without limitation the rights
	to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
	copies of the Software, and to permit persons to whom the Software is
	furnished to do so, subject to the following conditions:
	
	The above copyright notice and this permission notice shall be included in
	all copies or substantial portions of the Software.
	
	THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
	AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
	LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
	OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
	THE SOFTWARE.
	
 * TableSorter
 * @version 0.9.1 
 * @author cnizz.com 
 * @see http://cnizz.com/mootools/table-sorter/doc.php 
 * @param: options (head,request,action,destination,prev,next,rows,method,startWait,endWait)
 * @TODO 1) provide support for column highlighting, 2) up/down arrow by column header, 3) support for a second 
 * prev/next paginator at bottom of the table, 4) add support for optional ajax loader display, 5) stock css 
 */
var TableSorter = new Class({
	Implements: [Options],
	options:{
		head: '',
		request: '', 
		action: '', 
		destination: '', 
		prev: '', 
		next: '', 
		rows: 50, 
		page: location.href, 
		method: 'get',
		defaultStartEndWaitEnabled: 1,
		startWait: '',
		endWait: ''
	},
	initialize: function(options){
		this.setOptions(options);
		this.orderBy = '';
		this.column = '';
		this.param = '';
		this.paramArr = new Array();
		var tr = $(this.options.head).getParent();
		var tbl = tr.getParent();
		this.table = tbl;
		this.setDomElements();
		this.direction = 'upArrow';
		this.cellIndex = null;
		this.headRowIndex = null;
		this.tblLen = null;
	},
	sort: function(column,param,start,tblLen,headRowIndex,cellIndex){ // send resort request	
		if(this.options.defaultStartEndWaitEnabled==1){
			this.reloadView(1);
		}
		else{
			eval(this.options.startWait)
		}
		
		this.cellIndex = cellIndex;
		this.headRowIndex = headRowIndex;
		this.tblLen = tblLen;
		var destination = this.options.destination;
		
		if(column==undefined){
			column='';
		}
		if(param==undefined){
			param='';
		}
		this.column = column;
		this.param = param;
		
		if(isNaN(start)){
			start=0;
		}
		
		var paramStr='';
		for(var i=0;i<this.paramArr.length;i++){
			paramStr+= '&'+this.paramArr[i].name+'='+this.paramArr[i].value;
		}
		
		var xhr = new Request({
			url: this.options.page,
			method: this.options.method,
			onComplete: function(){
				if(this.options.defaultStartEndWaitEnabled==1){
					this.reloadView(0);
				}
				else{
					eval(this.options.startWait)
				}
				
				$(destination).innerHTML = xhr.response.text;
				this.setDomElements();
				var tr = $(this.options.head).getParent();
				var tbl = tr.getParent();
				this.table = tbl;
				var header = false;
				
				for(var i=headRowIndex;i<(tblLen-headRowIndex);i++){
					var cell = this.table.rows[i].cells;

					if(i%2)
					{
						cell[cellIndex].addClass('focusedColumn');
						cell[cellIndex].addClass('focusedColumn');
					}
					else{
						if(header===false){
							var text = cell[this.cellIndex].innerHTML;
							cell[cellIndex].innerHTML='<div class="'+this.direction+'">&nbsp;</div><div class="TableSorterFloatLeft">'+text+'</div>';
							header=true;
						}
						else{
							cell[cellIndex].addClass('focusedColumn');
							cell[cellIndex].addClass('focusedColumn');
						}
					}
				}
			}.bind(this)
		}).send(this.options.request+'='+this.options.action+'&column='+column+'&start='+start+'&rows='+this.options.rows+'&param='+param+'&orderBy='+this.orderBy+paramStr);
	},
	setDomElements: function(column,param){ // set dom events
		if(this.options.prev!='')
		{
			$(this.options.prev).addEvent('click',function(){
				this.sort(this.column,this.param,($(this.options.prev).title*1)-this.options.rows,this.tblLen,this.headRowIndex,this.cellIndex);
			}.bind(this));
		}
		if(this.options.next!='')
		{
			$(this.options.next).addEvent('click',function(){
				this.sort(this.column,this.param,($(this.options.next).title*1),this.tblLen,this.headRowIndex,this.cellIndex);
			}.bind(this))
		}
		
		var childrenArr = $(this.options.head).getChildren();
		var len = childrenArr.length;
		var o = this;
		var tblLen = this.table.getElementsByTagName('tr').length;
		var headRowIndex = $(o.options.head).rowIndex;
		
		for(var i=0;i<len;i++){
 			if(childrenArr[i].id!=''){
				$(childrenArr[i]).addEvent('click',function(){
					o.orderBy=this.title;
					o.sort(o.column,o.param,0,tblLen,headRowIndex,this.cellIndex);
					if(o.direction=='upArrow'){
						o.direction = 'downArrow';
					}
					else{
						o.direction = 'upArrow';
					}
				})
			}
		}
		this.direction = o.direction;
	},
	reloadView: function(is_viewable){
		if(is_viewable==1){ // displays ajax loader
			$(this.options.destination).innerHTML = '<div style="margin:0 auto;font-size:200%;width:250px;">&nbsp;</div>';
			$(this.options.destination).addClass('TableSorterLoadImage');
			$(this.options.destination).fade('out');
		}
		else{ // removes ajax loader
			$(this.options.destination).fade('in');
			$(this.options.destination).removeClass('TableSorterLoadImage');
		}
	},
	addParameter: function(name,value){ // add additional xhr request string (name/parameter)
		var Parameter = new Class({
			initialize: function(name,value){
				this.name = name;
				this.value = value;
			},
		})
		param = new Parameter(name,value);
		this.paramArr.push(param);
	},
	removeParameter: function(name){ // remove xhr request string
		var len = this.paramArr.length;
		var tmpArr = new Array();
		for(var i=0;i<len;i++){
			if(this.paramArr[i].name!=name){
				tmpArr.push(this.paramArr[i]);
			}
		}
		this.paramArr = tmpArr;
	},
	removeAllParameters: function(){
		this.paramArr = new Array();
	}
})