/*
 inspired by the lightbox plugin adapted to jquery by leandro vieira pinho (http://leandrovieira.com)
 
 @author  : nicolas turlais : nicolas-at-insipi.de
 @version : v0.3.1 - june 2012
 @license : licensed under ccattribution-sharealike
 @website : http://chocolat.insipi.de
 
*/
(function($) {
	images = [];
	var calls = 0;
	$.fn.chocolat = function(settings) {
		settings = $.extend({
			container             : $('body'),
			displayasalink        : false,
			linkimages            : true,
			linkscontainer        : 'choco_links_container',				
			overlayopacity        : 0.9,
			overlaycolor          : '#fff',
			fadeinoverlayduration : 500,
			fadeinimageduration   : 500,
			fadeoutimageduration  : 500,
			vache                 : true,					
			separator1            : ' | ',						
			separator2            : '/',						
			leftimg               : 'images/left.gif',	
			rightimg              : 'images/right.gif',	
			closeimg              : 'images/close.gif',		
			loadingimg            : 'images/loading.gif',		
			currentimage          : 0,						
			setindex              : 0,
			settitle              : '',
			lastimage             : 0
		},settings);
		
		calls++;
		settings.setindex = calls;
		images[settings.setindex] = [];
		
		//images:
		this.each(function(index){
			if(index == 0 && settings.linkimages && settings.settitle == ''){
				settings.settitle = isset($(this).attr('rel'), ' ');
			}
			$(this).each(function() {
				images[settings.setindex]['displayasalink'] = settings.displayasalink;
				images[settings.setindex][index]            = [];
				images[settings.setindex][index]['adress']  = isset($(this).attr('href'), ' ');
				images[settings.setindex][index]['caption'] = isset($(this).attr('title'), ' ');
				if(!settings.displayasalink){
					$(this).unbind('click').bind('click', {
						id  : settings.setindex,
						nom : settings.settitle,
						i   : index
					}, _initialise);
				}
			})
		});
		
		//setindex:
		for(var i = 0; i < images[settings.setindex].length; i++)
		{
			if(images[settings.setindex]['displayasalink']){
				if($('#'+settings.linkscontainer).size() == 0){
					this.filter(":first").before('<ul id="'+settings.linkscontainer+'"></ul>');
				}
				$('#'+settings.linkscontainer).append('<li><a href="#" id="choco_numsetindex_'+settings.setindex+'" class="choco_link">'+settings.settitle+'</a></li>');
				e = this.parent();
				$(this).remove();
				if($.trim(e.html()) == ""){//if parent empty : remove it
					e.remove();
				}
				return $('#choco_numsetindex_'+settings.setindex).unbind('click').bind('click', {id: settings.setindex, nom : settings.settitle, i : settings.currentimage}, _initialise);
			}
		}
		
		function _initialise(event) {
			
			settings.currentimage = event.data.i;
			settings.setindex     = event.data.id;
			settings.settitle     = event.data.nom;
			settings.lastimage    = images[settings.setindex].length - 1;
			showchocolat();
			return false;
		}
		function _interface(){
			//html
			clear();
			settings.container.append('<div id="choco_overlay"></div><div id="choco_content"><div id="choco_close"></div><div id="choco_loading"></div><div id="choco_container_photo"><img id="choco_bigimage" src="" /></div><div id="choco_container_description"><span id="choco_container_title"></span><span id="choco_container_via"></span></div><div id="choco_left_arrow" class="choco_arrows"></div><div id="choco_right_arrow" class="choco_arrows"></div></div>');	
			$('#choco_left_arrow').css('background-image', 'url('+settings.leftimg+')');  
			$('#choco_right_arrow').css('background-image', 'url('+settings.rightimg+')');  
			$('#choco_close').css('background-image', 'url('+settings.closeimg+')'); 
			$('#choco_loading').css('background-image', 'url('+settings.loadingimg+')'); 
			if(settings.container.get(0).nodename.tolowercase() !== 'body'){
				settings.container.css({'position':'relative','overflow':'hidden','line-height':'normal'});//yes, yes
				$('#choco_content').css('position','relative');
				$('#choco_overlay').css('position', 'absolute');
			}
			//events
			$(document).unbind('keydown').bind('keydown', function(e){
				switch(e.keycode){
					case 37:
						changepagechocolat(-1);
						break;
					case 39:
						changepagechocolat(1);
						break;
					case 27:
						close();
						break;
				};
			});
			if(settings.vache){
				$('#choco_overlay').click(function(){
					close();
					return false;
				});
			}
			$('#choco_left_arrow').unbind().bind('click', function(){
				changepagechocolat(-1);
				return false;
			});
			$('#choco_right_arrow').unbind().bind('click', function(){
				changepagechocolat(1);
				return false;
			});
			$('#choco_close').unbind().bind('click', function(){
				close();
				return false;
			});
			$(window).resize(function() {
				load(settings.currentimage,true);
			});
	
		}
		function showchocolat(){	
			_interface();
			load(settings.currentimage, false);
			$('#choco_overlay')
				.css({
					'background-color' : settings.overlaycolor,
					'opacity'          : settings.overlayopacity
				})
				.fadein(settings.fadeinoverlayduration);
			$('#choco_content').fadein(settings.fadeinimageduration,function(){});
			
		}
		function load(image,resize){
			settings.currentimage = image;
			$('#choco_loading').fadein(settings.fadeinimageduration);
			var imgpreloader = new image();
			imgpreloader.onload = function(){
				$('#choco_bigimage').attr('src',images[settings.setindex][settings.currentimage]['adress']);
				var ajustees = iwanttheperfectimagesize(imgpreloader.height,imgpreloader.width);
				chocolat(ajustees['hauteur'],ajustees['largeur'],resize);
				$('#choco_loading').stop().fadeout(settings.fadeoutimageduration);
			};
			imgpreloader.src = images[settings.setindex][settings.currentimage]['adress'];
			preload();
			upadtedescription();
		}
		function changepagechocolat(signe){
			if(!settings.linkimages || (settings.currentimage == 0 && signe == -1) || (settings.currentimage == settings.lastimage && signe == 1))
			{
				return false;
			}
			else{
				//$('#choco_container_description').fadeto(settings.fadeoutimageduration,0); making a weird bug with firefox 17
				$('#choco_container_description').css('visibility','hidden');
				$('#choco_bigimage').fadeto(settings.fadeoutimageduration, 0, function(){
					load(settings.currentimage + parseint(signe), false);
				});
			}
		}
		function chocolat(hauteur_image,largeur_image,resize){

			if(resize){
				$('#choco_container_photo, #choco_content, #choco_bigimage').stop(true,false).css({'overflow':'visible'});
				$('#choco_bigimage').animate({
					'height' : hauteur_image+'px',
					'width'  : largeur_image+'px'
				},settings.fadeinimageduration);
			}
			$('#choco_container_photo').animate({
					'height' : hauteur_image,
					'width'  : largeur_image
			},settings.fadeinimageduration);
			$('#choco_content').animate({
				'height'     : hauteur_image,
				'width'      : largeur_image,
				'marginleft' : -largeur_image/2,
				'margintop'  : -(hauteur_image)/2
			},settings.fadeinimageduration, 'swing', function(){
				$('#choco_bigimage').fadeto(settings.fadeinimageduration, 1).height(hauteur_image).width(largeur_image);
				if(!resize)
				{
					arrowsmanaging();
					//$('#choco_container_description').fadeto(settings.fadeinimageduration,1); making a weird bug with firefox 17
					$('#choco_container_description').css('visibility','visible');
					$('#choco_close').fadein(settings.fadeinimageduration);
				}
			}).
			css('overflow', 'visible');
		}
		function arrowsmanaging(){
			if(settings.linkimages){
				var what = ['choco_right_arrow','choco_left_arrow'];
				for(var i=0; i < what.length; i++){
					hide = false;
					if(what[i] == 'choco_right_arrow' && settings.currentimage == settings.lastimage){
						hide = true;
						$('#'+what[i]).fadeout(300);
					}
					else if(what[i] == 'choco_left_arrow' && settings.currentimage == 0){
						hide = true;
						$('#'+what[i]).fadeout(300);
					}
					if(!hide){
						$('#'+what[i]).fadein(settings.fadeoutimageduration);
					}
				}
			}
		}
		function preload(){
			if(settings.currentimage !== settings.lastimage){
				i = new image;
				z = settings.currentimage + 1;
				i.src = images[settings.setindex][z]['adress'];
			}
		}
		function upadtedescription(){
			var current = settings.currentimage + 1;
			var last = settings.lastimage + 1;
			$('#choco_container_title').html(images[settings.setindex][settings.currentimage]['caption']);
			$('#choco_container_via').html(settings.settitle+settings.separator1+current +settings.separator2+last);
		}
		function isset(variable,defaultvalue){
			// return variable === undefined ? defaultvalue : variable; ?
			if (variable === undefined) {
				return defaultvalue;
			}
			else{
				return variable;
			}
		}
		function iwanttheperfectimagesize(himg,limg){
			//28% = 14% + 14% margin
			var lblock             = limg + (limg*28/100);
			var heightdescandclose = $('#choco_container_description').height()+$('#choco_close').height();
			var hblock             = himg + heightdescandclose;
			var k                  = limg/himg;
			var kk                 = himg/limg;
			if(settings.container.get(0).nodename.tolowercase() == 'body'){
				windowheight = $(window).height();
				windowwidth  = $(window).width();
			}
			else{
				windowheight = settings.container.height();
				windowwidth  = settings.container.width();
			}
			notfitting = true;
				while (notfitting){
				var lblock = limg + (limg*28/100);
				var hblock = himg + heightdescandclose;
					if(lblock > windowwidth){
						limg = windowwidth*100/128;
						
						himg = kk * limg;
					}else if(hblock > windowheight){
						himg = (windowheight - heightdescandclose);
						limg = k * himg;
					}else{
						notfitting = false;
					};
				};
			return {
				largeur:limg,
				hauteur:himg
			};

		}
		function clear(){
			$('#choco_overlay').remove();
			$('#choco_content').remove();
		}
		function close(){
			$('#choco_overlay').fadeout(900, function(){$('#choco_overlay').remove()});
			$('#choco_content').fadeout(500, function(){$('#choco_content').remove()});
			settings.currentimage = 0;
		}
	
};
})(jquery);