jQuery.fn.waDialog = function (options) {
	options = options || {}
	options = jQuery.extend({
		esc: true,
		buttons: null,
		url: null,
		disableButtonsOnSubmit: false,
		onLoad: null,
		onCancel: null,
		onSubmit: null		
	}, options);
	
	var d = $(this);

	var id = d.attr('id');
	if (id && !d.hasClass('dialog')) {
		d.removeAttr('id');
		$("#" + id).remove();
	}	
	
	var cl = (options['class'] || options['className']) ? (options['class'] || options['className']) : d.attr('class');
	
	if (!d.hasClass('dialog')) {
		var content = $(this);
		var d = $('<div ' + (id ? 'id = "' + id + '"' : '') + ' class="dialog ' + cl + '" style="display: none">'+
					'<div class="dialog-background"></div>'+
					'<div class="dialog-window"></div>'+
			  '</div>').appendTo('body');
		if (content.find('.dialog-content').length || content.find('.dialog-buttons').length) {
			$('.dialog-window', d).append(content.show());
			var dc = content.find('.dialog-content');
			if (dc.length) {
				var tmp = $('<div class="dialog-content-indent"></div>');
				dc.contents().appendTo(tmp);
				dc.append(tmp);
			}
			dc = content.find('.dialog-buttons');
			if (dc.length) {
				var tmp = $('<div class="dialog-buttons-gradient"></div>');
				dc.contents().appendTo(tmp);
				dc.append(tmp);
			}			
		} else {
			$('.dialog-window', d).append(
					(options.onSubmit ? '<form method="post" action="">' : '') + 
					'<div class="dialog-content">'+
						'<div class="dialog-content-indent">'+
							// content goes here
						'</div>'+
					'</div>'+
					'<div class="dialog-buttons">'+
						'<div class="dialog-buttons-gradient">'+
							// buttons go here
						'</div>'+
					'</div>'+
					(options.onSubmit ? '</form>' : '')
			);
			d.find('.dialog-content-indent').append(content.show());
		}
		d.find('.dialog-buttons-gradient').append(options.buttons);
		if (options.url) {
			d.find('.dialog-content-indent').append('<h1>Loading... <i class="icon16 loading"></i></h1>');
		} else if (options.content) {
			d.find('.dialog-content-indent').append(options.content);
		} 		
		if (options.title) {
			d.find('.dialog-content-indent').prepend('<h1>' + options.title + '</h1>');
		} 
	} else if (options.content) {
		d.find('.dialog-content-indent').html(options.content);
	} else if (options.buttons) {
		d.find('.dialog-buttons-gradient').html(options.buttons);
	}
	
	if (d.find('.dialog-background').length) {
		d.prepend('<div class="dialog-background"> </div>');
	}
	
	d.bind('close', function () {
		if (options.onClose) {
			options.onClose.call($(this));
		}
		$(this).hide();
	});
	
	var css = ['width', 'height', 'min-width', 'min-height'];
	for (var k = 0; k < css.length; k++) {
		if (options[css[k]]) {
			if ((css[k] == 'height' && options[css[k]] < '300px') || (css[k] == 'width' && options[css[k]] < '400px')) {
				d.find('div.dialog-window').css('min-' + css[k], options[css[k]]);
			} 
			d.find('div.dialog-window').css(css[k], options[css[k]]);
		}
	}
	
	if (options.disableButtonsOnSubmit) {
		d.find("input[type=submit]").removeAttr('disabled');
	}
	
	if (!d.parent().length) {
		d.appendTo('body');
	}
	
	d.find('.dialog-buttons .cancel').unbind('click').click(function (e) {
		e.stopPropagation(); 
		e.preventDefault();
		if (options.onCancel) {
			options.onCancel.call(d.get(0));
		}
		d.trigger('close');
		return false;
	});
	
	d.show();
	
	if (options.url) {
		jQuery.get(options.url, function (response) {
			var el = $(response);
			if (el.find('.dialog-content').length || el.find('.dialog-buttons').length) {
				if (el.find('.dialog-content').length) {
					d.find('.dialog-content-indent').empty().append(el.find('.dialog-content'));
				}
				if (el.find('.dialog-buttons').length) {
					d.find('.dialog-buttons-gradient').empty().append(el.find('.dialog-buttons'));
				}
			} else {
				d.find('.dialog-content-indent').empty().append(el);
			}
			d.trigger('resize');
			if (options.onLoad) {
				options.onLoad.call(d.get(0));
			}
		});
	} else {
		if (options.onLoad) {
			options.onLoad.call(d.get(0));
		}		
	}	

	if (options.onSubmit) {
		d.find('form').unbind('submit').submit(function () {
			if (options.disableButtonsOnSubmit) {
				d.find("input[type=submit]").attr('disabled', 'disabled');
			}
			return options.onSubmit.apply(this, [d]);
		});
	}
		
	d.bind('resize', function () {
		var el = jQuery(this).find('.dialog-window');
		var dw = el.width();
		var dh = el.height();
		
		jQuery("body").css('min-height', dh+'px');
		
		var ww = jQuery(window).width();
		var wh = jQuery(window).height()-60;
	
		//centralize dialog
		var w = (ww-dw)/2 / ww;
		var h = (wh-dh-60)/2 / wh; //60px is the height of .dialog-buttons div
		if (h < 0) h = 0;
		if (w < 0) w = 0;
		
		el.css({
			'left': Math.round(w*100)+'%',
			'top': Math.round(h*100)+'%'
		});
	}).trigger('resize');
	
	if (options.esc) {
		d.bind('esc', function () {
			d.trigger('close');
		});
	}
	return d;
}

jQuery(window).resize(function () {
	jQuery(".dialog:visible").trigger('resize');
});

jQuery(document).keyup(function(e) {
	//all dialogs should be closed when Escape is pressed
	if (e.keyCode == 27) {
		jQuery(".dialog:visible").trigger('esc');
	} 
});