var SortableTable = {
	init : function(elm, o){
		var table = $(elm);
		Object.extend(SortableTable.options, o || {} );
		
		var doscroll = (SortableTable.options.tableScroll == 'on' || (SortableTable.options.tableScroll == 'class' && table.hasClassName(SortableTable.options.tableScrollClass)));
		var sortFirst;
		var cells = SortableTable.getHeaderCells(table);
		
		cells.each(function(c,i){
			c = $(c);
			if(!doscroll) {
				c.addEvent('click', SortableTable.sort.pass([table,table, c, i]));
				c.addClassName(SortableTable.options.columnClass);
			}
			if(c.hasClassName(SortableTable.options.sortFirstAscendingClass) || c.hasClassName(SortableTable.options.sortFirstDecendingClass)) sortFirst = c;
		});
		
		var rows = SortableTable.getBodyRows(table);
		rows.each(function(r,i) {
				SortableTable.addRowClass(r,i);
		});
		
		if(doscroll) SortableTable.initScroll(table);
	},
	initScroll : function(elm){
		var table = $(elm);
		table.addClassName(SortableTable.options.tableScrollClass);
		
		var w = table.offsetWidth;
		
		table.setStyles({'border-spacing': '0', 'table-layout': 'fixed',	width: w + 'px'	});
		
		var cells = SortableTable.getHeaderCells(table);
		cells.each(function(c,i){
			c = $(c);
			var cw = c.offsetWidth;
			c.setStyles({width: cw + 'px'});
			$A(table.tBodies[0].rows).each(function(r){
				$(r.cells[i]).setStyles({width: cw + 'px'});
			})
		})	
		// Fixed Head
		var head = (table.tHead && table.tHead.rows.length > 0) ? table.tHead : table.rows[0];
		var hclone = head.cloneNode(true);
		
		var hdiv = $(document.createElement('div'));
		hdiv.id = table.id + '-head';
		table.parentNode.insertBefore(hdiv, table);
		hdiv.setStyles({overflow: 'hidden'});
		var htbl = $(document.createElement('table'));
		htbl.setStyles({'border-spacing': '0','table-layout': 'fixed',	width: w + 'px'	});
		hdiv.appendChild(htbl);
		hdiv.addClassName('scroll-table-head');
		
		table.removeChild(head);
		htbl.appendChild(hclone);
		
		cells = SortableTable.getHeaderCells(htbl);
		cells.each(function(c,i){
			c = $(c);
			c.addEvent('click', SortableTable.sort.pass([htbl, table, c, i]));
			c.addClassName(SortableTable.options.columnClass);
		});	

		// Table Body
		var cdiv = $(document.createElement('div'));
		cdiv.id = table.id + '-body';
		table.parentNode.insertBefore(cdiv, table);
		cdiv.setStyles({overflow: 'auto'});
		cdiv.appendChild(table);
		cdiv.addClassName('scroll-table-body');
		
		hdiv.scrollLeft = 0;
		cdiv.scrollLeft = 0;
		
		cdiv.addEvent('scroll', SortableTable.scroll.pass([],table));
		if(table.offsetHeight - cdiv.offsetHeight > 0){
			cdiv.setStyles({width:(cdiv.offsetWidth + 16) + 'px'})
		}
	},
	scroll: function(){
		$(this.id + '-head').scrollLeft  = $(this.id + '-body').scrollLeft;
    },
	sort : function(tableH, tableB, cell, index) {
		tableH = $(tableH);
		tableB = $(tableB);
		cell = $(cell);
		var op = SortableTable.options;
		if(cell.hasClassName(op.nosortClass)) return;	
		var order = order ? order : (cell.hasClassName(op.descendingClass) ? 1 : -1);

		var hcells = SortableTable.getHeaderCells(tableH);
		
		$A(hcells).each(function(c,i){
			c = $(c);
			if(i == index) {
				if(order == 1) {
					c.removeClassName(op.descendingClass);
					c.addClassName(op.ascendingClass);
				} else {
					c.removeClassName(op.ascendingClass);
					c.addClassName(op.descendingClass);
				}
			} else {
				c.removeClassName(op.ascendingClass);
				c.removeClassName(op.descendingClass);
			}
		});

		var rows = SortableTable.getBodyRows(tableB);
		var datatype = SortableTable.getDataType(cell);
		
		rows.sort(function(a,b) {
			return order * SortableTable.types[datatype](SortableTable.getCellText(a.cells[index]),SortableTable.getCellText(b.cells[index]));
		});
		
		rows.each(function(r,i) {
			tableB.tBodies[0].appendChild(r);
			SortableTable.addRowClass(r,i);
		});
		
	},
	types : {
		number : function(a,b) {
			// This will grab the first thing that looks like a number from a string, so you can use it to order a column of various srings containing numbers.
			var calc = function(v) {
				v = parseFloat(v.replace(/^.*?([-+]?[\d]*\.?[\d]+(?:[eE][-+]?[\d]+)?).*$/,"$1"));
				return isNaN(v) ? 0 : v;
			}
			return SortableTable.compare(calc(a),calc(b));
		},
		text : function(a,b) {
			return SortableTable.compare(a ? a.toLowerCase() : '', b ? b.toLowerCase() : '');
		},
		casesensitivetext : function(a,b) {
			return SortableTable.compare(a,b);
		},
		datasize : function(a,b) {
			var calc = function(v) {
				var r = v.match(/^([-+]?[\d]*\.?[\d]+([eE][-+]?[\d]+)?)\s?([k|m|g|t]?b)?/i);
				var b = r[1] ? Number(r[1]).valueOf() : 0;
				var m = r[3] ? r[3].substr(0,1).toLowerCase() : '';
				switch(m) {
					case  'k':
						return b * 1024;
						break;
					case  'm':				
						return b * 1024 * 1024;
						break;
					case  'g':
						return b * 1024 * 1024 * 1024;
						break;
					case  't':
						return b * 1024 * 1024 * 1024 * 1024;
						break;
				}
				return b;
			}
			return SortableTable.compare(calc(a),calc(b));
		},
		'date-au' : function(a,b) {
			var calc = function(v) {
				var r = v.match(/^(\d{2})\/(\d{2})\/(\d{4})\s?(?:(\d{1,2})\:(\d{2})(?:\:(\d{2}))?\s?([a|p]?m?))?/i);
				var yr_num = r[3];
				var mo_num = parseInt(r[2])-1;
				var day_num = r[1];
				var hr_num = r[4] ? r[4] : 0;
				if(r[7] && r[7].toLowerCase().indexOf('p') != -1) {
					hr_num = parseInt(r[4]) + 12;
				}
				var min_num = r[5] ? r[5] : 0;
				var sec_num = r[6] ? r[6] : 0;
				return new Date(yr_num, mo_num, day_num, hr_num, min_num, sec_num, 0).valueOf();
			}
			return SortableTable.compare(a ? calc(a) : 0, b ? calc(b) : 0);
		},
		'date-us' : function(a,b) {
			var calc = function(v) {
				var r = v.match(/^(\d{2})\/(\d{2})\/(\d{4})\s?(?:(\d{1,2})\:(\d{2})(?:\:(\d{2}))?\s?([a|p]?m?))?/i);
				var yr_num = r[3];
				var mo_num = parseInt(r[1])-1;
				var day_num = r[2];
				var hr_num = r[4] ? r[4] : 0;
				if(r[7] && r[7].toLowerCase().indexOf('p') != -1) {
					hr_num = parseInt(r[4]) + 12;
				}
				var min_num = r[5] ? r[5] : 0;
				var sec_num = r[6] ? r[6] : 0;
				return new Date(yr_num, mo_num, day_num, hr_num, min_num, sec_num, 0).valueOf();
			}
			return SortableTable.compare(a ? calc(a) : 0, b ? calc(b) : 0);
		},
		'date-eu' : function(a,b) {
			var calc = function(v) {
				var r = v.match(/^(\d{2})-(\d{2})-(\d{4})/);
				var yr_num = r[3];
				var mo_num = parseInt(r[2])-1;
				var day_num = r[1];
				return new Date(yr_num, mo_num, day_num).valueOf();
			}
			return SortableTable.compare(a ? calc(a) : 0, b ? calc(b) : 0);
		},
		'date-iso' : function(a,b) {
			// http://delete.me.uk/2005/03/iso8601.html ROCK!
			var calc = function(v) {
			    var d = v.match(/([\d]{4})(-([\d]{2})(-([\d]{2})(T([\d]{2}):([\d]{2})(:([\d]{2})(\.([\d]+))?)?(Z|(([-+])([\d]{2}):([\d]{2})))?)?)?)?/);
			
			    var offset = 0;
			    var date = new Date(d[1], 0, 1);
			
			    if (d[3]) { date.setMonth(d[3] - 1) ;}
			    if (d[5]) { date.setDate(d[5]); }
			    if (d[7]) { date.setHours(d[7]); }
			    if (d[8]) { date.setMinutes(d[8]); }
			    if (d[10]) { date.setSeconds(d[10]); }
			    if (d[12]) { date.setMilliseconds(Number("0." + d[12]) * 1000); }
			    if (d[14]) {
			        offset = (Number(d[16]) * 60) + Number(d[17]);
			        offset *= ((d[15] == '-') ? 1 : -1);
			    }
			    offset -= date.getTimezoneOffset();
			    if(offset != 0) {
			    	var time = (Number(date) + (offset * 60 * 1000));
			    	date.setTime(Number(time));
			    }
				return date.valueOf();
			}
			return SortableTable.compare(a ? calc(a) : 0, b ? calc(b) : 0);

		},
		date : function(a,b) { // must be standard javascript date format
			if(a && b) {
				return SortableTable.compare(new Date(a),new Date(b));
			} else {
				return SortableTable.compare(a ? 1 : 0, b ? 1 : 0);
			}
			return SortableTable.compare(a ? new Date(a).valueOf() : 0, b ? new Date(b).valueOf() : 0);
		},
		time : function(a,b) {
			var d = new Date();
			var ds = d.getMonth() + "/" + d.getDate() + "/" + d.getFullYear() + " "
			return SortableTable.compare(new Date(ds + a),new Date(ds + b));
		},
		currency : function(a,b) {
			a = parseFloat(a.replace(/[^-\d\.]/g,''));
			b = parseFloat(b.replace(/[^-\d\.]/g,''));
			return SortableTable.compare(a,b);
		}
	},
	compare : function(a,b) {
		return a < b ? -1 : a == b ? 0 : 1;
	},
	addSortType : function(name, sortfunc) {
		SortableTable.types[name] = sortfunc;
	},
	getBodyRows : function(table) {
		table = $(table);
		return (table.hasClassName(SortableTable.options.tableScrollClass) || table.tHead && table.tHead.rows.length > 0) ? 
					$A(table.tBodies[0].rows) : $A(table.rows).without(table.rows[0]);
	},
	addRowClass : function(r,i) {
		r = $(r)
		r.removeClassName(SortableTable.options.rowEvenClass);
		r.removeClassName(SortableTable.options.rowOddClass);
		r.addClassName(((i+1)%2 == 0 ? SortableTable.options.rowEvenClass : SortableTable.options.rowOddClass));
	},
	getHeaderCells : function(table) {
		return $A((table.tHead && table.tHead.rows.length > 0) ? table.tHead.rows[table.tHead.rows.length-1].cells : table.rows[0].cells);
	},
	getCellText : function(cell) {
		if(!cell) return "";
		return cell.textContent ? cell.textContent : cell.innerText;
	},
	getDataType : function(cell) {
		return cell.getProperty('type');
	},
	setup : function(o) {
		Object.extend(SortableTable.options, o || {} )
	},
	options : {
		autoLoad : true,
		tableSelector : ['table.sortable'],
		columnClass : 'sortcol',
		descendingClass : 'sortdesc',
		ascendingClass : 'sortasc',
		nosortClass : 'nosort',
		sortFirstAscendingClass : 'sortfirstasc',
		sortFirstDecendingClass : 'sortfirstdesc',
		rowEvenClass : 'roweven',
		rowOddClass : 'rowodd',
		tableScroll : 'class',   // off | on | class;
		tableScrollClass : 'scroll'
	},
	_count : 0,
	load : function() {
		if(SortableTable.options.autoLoad) {
			$A(SortableTable.options.tableSelector).each(function(s){
				$$(s).each(function(t) {
					SortableTable.init(t, {tableScroll : SortableTable.options.tableScroll});
				});
			});
		}
	}
}
window.addEvent('load', function(){ SortableTable.load();});