/*
 * jQuery Impromptu
 * By: Trent Richardson [http://trentrichardson.com]
 * Version 2.4
 * Last Modified: 3/22/2009
 * 
 * Copyright 2009 Trent Richardson
 * Dual licensed under the MIT and GPL licenses.
 * http://trentrichardson.com/Impromptu/GPL-LICENSE.txt
 * http://trentrichardson.com/Impromptu/MIT-LICENSE.txt
 * 
 */
 
(function($) {
	$.prompt = function(m, o) {
		o = $.extend({},$.prompt.defaults,o);
		$.prompt.currentPrefix = o.prefix;

		var ie6 = ($.browser.msie && $.browser.version < 7);
		var b = $(document.body);
		var w = $(window);

		//build the box and fade
		var msgbox = '<div class="'+ o.prefix +'box" id="'+ o.prefix +'box">';
		if(o.useiframe && (($('object, applet').length > 0) || ie6))
			msgbox += '<iframe src="javascript:;" class="'+ o.prefix +'fade" id="'+ o.prefix +'fade"></iframe>';
		else{
			if(ie6) $('select').css('visibility','hidden');
			msgbox +='<div class="'+ o.prefix +'fade" id="'+ o.prefix +'fade"></div>';
		}
		msgbox += '<div class="'+ o.prefix +'" id="'+ o.prefix +'"><div class="'+ o.prefix +'container"><div class="'
				+ o.prefix +'close">X</div><div id="'+ o.prefix +'states"></div>';
			 	+ '</div></div></div>';

		var jqib = $(msgbox).appendTo(b);
		var jqi = jqib.children('#'+ o.prefix);
		var jqif = jqib.children('#'+ o.prefix +'fade');

		//if a string was passed, convert to a single state
		if(m.constructor == String){
			m = {
				state0: {
					html: m,
				 	buttons: o.buttons,
				 	focus: o.focus,
				 	submit: o.submit
			 	}
		 	};
		}

		//build the states
		var states = "";

		$.each(m,function(statename,stateobj){
			stateobj = $.extend({},$.prompt.defaults.state,stateobj);
			m[statename] = stateobj;

			states += '<div id="'+ o.prefix +'_state_'+ statename +'" class="'+ o.prefix + '_state" style="display:none;"><div class="'+ o.prefix +'message">' + stateobj.html +'</div><div class="'+ o.prefix +'buttons">';
			$.each(stateobj.buttons, function(k, v){
				states += '<button name="' + o.prefix + '_' + statename + '_button' + k + '" id="' + o.prefix +	'_' + statename + '_button' + k + '" value="' + v + '">' + k + '</button>';
			});
			states += '</div></div>';
		});

		//insert the states...
		jqi.find('#'+ o.prefix +'states').html(states).children('.'+ o.prefix +'_state:first').css('display','block');
		jqi.find('.'+ o.prefix +'buttons:empty').css('display','none');
		
		//Events
		$.each(m,function(statename,stateobj){
			var state = jqi.find('#'+ o.prefix +'_state_'+ statename);

			state.children('.'+ o.prefix +'buttons').children('button').click(function(){
				var msg = state.children('.'+ o.prefix +'message');
				var clicked = stateobj.buttons[$(this).text()];
				var forminputs = {};

				//collect all form element values from all states
				$.each(jqi.find('#'+ o.prefix +'states :input').serializeArray(),function(i,obj){
						if (forminputs[obj.name] == undefined)
							forminputs[obj.name] = obj.value;
						else if (typeof forminputs[obj.name] == Array)
							forminputs[obj.name].push(obj.value);
						else forminputs[obj.name] = [forminputs[obj.name],obj.value];
				});

				if(stateobj.submit(clicked,msg,forminputs))
					removePrompt(true,clicked,msg,forminputs);
			});
			state.find('.'+ o.prefix +'buttons button:eq('+ stateobj.focus +')').addClass(o.prefix +'defaultbutton');

		});

		var ie6scroll = function(){
			jqib.css({ top: w.scrollTop() });
		};

		var fadeClicked = function(){
			if(o.persistent){
				var i = 0;
				jqib.addClass(o.prefix +'warning');
				var intervalid = setInterval(function(){
					jqib.toggleClass(o.prefix +'warning');
					if(i++ > 1){
						clearInterval(intervalid);
						jqib.removeClass(o.prefix +'warning');
					}
				}, 100);
			}
			else removePrompt();
		};

		var escapeKeyClosePrompt = function(e){
			var key = (window.event) ? event.keyCode : e.keyCode; // MSIE or Firefox?
			if(key==27) removePrompt();
		};

		var positionPrompt = function(){
			jqib.css({
				position: (ie6) ? "absolute" : "fixed",
				height: w.height(),
				width: "100%",
				top: (ie6)? w.scrollTop() : 0,
				left: 0,
				right: 0,
				bottom: 0
			});
			jqif.css({
				position: "absolute",
				height: w.height(),
				width: "100%",
				top: 0,
				left: 0,
				right: 0,
				bottom: 0
			});
			jqi.css({
				position: "absolute",
				top: o.top,
				left: "50%",
				marginLeft: ((jqi.outerWidth()/2)*-1)
			});
		};

		var stylePrompt = function(){
			jqif.css({
				zIndex: o.zIndex,
				display: "none",
				opacity: o.opacity
			});
			jqi.css({
				zIndex: o.zIndex+1,
				display: "none"
			});
			jqib.css({
				zIndex: o.zIndex
			});
		};

		var removePrompt = function(callCallback, clicked, msg, formvals){
			jqi.remove();
			if(ie6)b.unbind('scroll',ie6scroll);//ie6, remove the scroll event
			w.unbind('resize',positionPrompt);
			jqif.fadeOut(o.overlayspeed,function(){
				jqif.unbind('click',fadeClicked);
				jqif.remove();
				if(callCallback) o.callback(clicked,msg,formvals);
				jqib.unbind('keypress',escapeKeyClosePrompt);
				jqib.remove();
				if(ie6 && !o.useiframe) $('select').css('visibility','visible');
			});
		};

		positionPrompt();
		stylePrompt();

		if(ie6) w.scroll(ie6scroll);//ie6, add a scroll event to fix position:fixed
		jqif.click(fadeClicked);
		w.resize(positionPrompt);
		jqib.keypress(escapeKeyClosePrompt);
		jqi.find('.'+ o.prefix +'close').click(removePrompt);

		//Show it
		jqif.fadeIn(o.overlayspeed);
		jqi[o.show](o.promptspeed,o.loaded);
		jqi.find('#'+ o.prefix +'states .'+ o.prefix +'_state:first .'+ o.prefix +'defaultbutton').focus();

		return jqib;
	};
	
	$.prompt.defaults = {
		prefix:'jqi',
		buttons: {
			Ok: true
		},
	 	loaded: function(){

	 	},
	  	submit: function(){
	  		return true;
		},
	 	callback: function(){

	 	},
		opacity: 0.6,
	 	zIndex: 999,
	  	overlayspeed: 'slow',
	   	promptspeed: 'fast',
   		show: 'fadeIn',
	   	focus: 0,
	    useiframe: false,
	 	top: "15%",
	  	persistent: true,
	  	state: {
			html: '',
		 	buttons: {
		 		Ok: true
		 	},
		  	focus: 0,
		   	submit: function(){
		   		return true;
		   }
	  	}
	};
	
	$.prompt.currentPrefix = $.prompt.defaults.prefix;

	$.prompt.setDefaults = function(o) {
		$.prompt.defaults = $.extend({}, $.prompt.defaults, o);
	};
	
	$.prompt.setStateDefaults = function(o) {
        	$.prompt.defaults.state = $.extend({}, $.prompt.defaults.state, o);
	};
	
	$.prompt.getStateContent = function(state) {
		return $('#'+ $.prompt.currentPrefix +'_state_'+ state);
	};
	
	$.prompt.goToState = function(state) {
		$('.'+ $.prompt.currentPrefix +'_state').slideUp('slow');
		$('#'+ $.prompt.currentPrefix +'_state_'+ state).slideDown('slow',function(){
			$(this).find('.'+ $.prompt.currentPrefix +'defaultbutton').focus();
		});
	};
	
	$.prompt.nextState = function() {
		var next = $('.'+ $.prompt.currentPrefix +'_state:visible').next();

		$('.'+ $.prompt.currentPrefix +'_state').slideUp('slow');
		
		next.slideDown('slow',function(){
			$(this).find('.'+ $.prompt.currentPrefix +'defaultbutton').focus();
		});
	};
	
	$.prompt.prevState = function() {
		var next = $('.'+ $.prompt.currentPrefix +'_state:visible').prev();

		$('.'+ $.prompt.currentPrefix +'_state').slideUp('slow');
		
		next.slideDown('slow',function(){
			$(this).find('.'+ $.prompt.currentPrefix +'defaultbutton').focus();
		});
	};
	
	$.prompt.close = function() {
        	$('#'+ $.prompt.currentPrefix +'box').fadeOut('fast',function(){
        		$(this).remove();
		});
	};
	
})(jQuery);