// original by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
function in_array(needle, haystack, strict) {
    var found = false, key, strict = !!strict;
 
    for (key in haystack) {
        if ((strict && haystack[key] === needle) || (!strict && haystack[key] == needle)) {
            found = true;
            break;
        }
    }
 
    return found;
}

(function($) {
	// setup a namespace for us
	var nsp = 'EmbedPicasaGallery';
	
	// Public Variables and Methods
	$[nsp] = {
		defaultOptions: {
			url : [],
			img_url : [],
			size : 72,
			msg_loading_list : 'Loading list from PicasaWeb',
			msg_loading_album : 'Loading album from PicasaWeb',
			msg_back : 'Back',
			msg_source : 'View source',
			album_title_tag: '<h2/>',
			slimboxparam: {} // @author ajaxforum
		} 
	};
	
	// Private Variables and Functions in the _ object
	// note that this will refer to _ unless you
	// call using the call or apply methods
	var _ = {
	};
	
	$.fn[nsp] = function(user,opts) {
	var localOpts = $.extend( 
		{}, // start with an empty map
		$[nsp].defaultOptions, // add defaults
		opts // add options
	);
	var Cache = {};
	
	function showOverview() {
		if ( Cache.__overview ){
			Cache.__overview.show();
			return;
		}
		var $this = $(this);
		if ( ! Cache.__original ){
			Cache.__original = $this.clone(true);
		}
		
		$this.after($('<div/>').css('clear','left'));
		
		var meta_opts = localOpts;
		if ($.meta){
			meta_opts = $.extend({}, localOpts, $this.data());
		}
		
		$this.text(meta_opts.msg_loading_list);
		var albumCount = 0;
		function appendImage(i,item){
			var title = item.media$group.media$title.$t;
			var href = item.link[1].href; // @author ajaxforum
			if (meta_opts.url.length == 0 || in_array(href, meta_opts.url)){ // @author ajaxforum
				albumCount++;
				$this.append( $("<div/>")
				.addClass('album_list')
				.click(function () {
					showAlbum($this,meta_opts,item.gphoto$id.$t,title);
				})
				.append(
					$("<img/>")
				.attr("src", item.media$group.media$thumbnail[0].url)
				)
				.append(
				$('<div/>')
				.addClass('album_description')
				.text(title)
				.width( meta_opts.size )
				)
				);
			};
		}
		
		function renderAlbumList(data){
			$this.empty();
			$.each(data.feed.entry,appendImage); 
			if (albumCount == 1){
				$this.children().eq(0).click();
				return;
			}
			
			Cache.__overview = $this;
		}
		
		$.getJSON('http://picasaweb.google.com/data/feed/api/user/' 
		+ user + '?kind=album&access=public&alt=json-in-script&thumbsize=' + meta_opts.size + 'c&callback=?',
		renderAlbumList
		);
	};
	
	function showAlbum($el,meta_opts,album,title){
	$el.hide();
	if ( Cache[album] ){
		Cache[album].show();
		return;
	};
	var $album = Cache.__original.clone(true);
	$el.after($album);
	$album.text(meta_opts.msg_loading_album);
	
	function appendImage(i,item){
		if (meta_opts.img_url.length == 0 || in_array(item.link[1].href, meta_opts.img_url)){ // @author ajaxforum
			var title = (item.media$group.media$description.$t? item.media$group.media$description.$t: item.media$group.media$title.$t); // @author ajaxforum
			var a = $("<a/>")
			.attr("href",item.content.src) 
			.attr("title",title)
			.append(
			$("<img/>")
			.attr("src", item.media$group.media$thumbnail[0].url)
			.attr("title",item.link[1].href ) // @author ajaxforum 
			.css({'border-width': '0px',
				width : meta_opts.size + 'px',
				height : meta_opts.size + 'px' 
			})
			);
			$album.append(
			$("<div/>")
			.addClass('album_image') // @author ajaxforum
			.append(a)
			.append(
					$("<div/>")
			.addClass('album_image_description')
			.append(title)
			) // @author ajaxforum
			);
		}
	}
	
	function renderAlbum(data){
		$album.empty();
		
		if (meta_opts.img_url.length == 0) {
			$album.append($(meta_opts.album_title_tag).text(title))
		}
		
		if (Cache.__overview){
			$album.append($("<div/>")
			.css({
				width : meta_opts.size + 'px',
				height : meta_opts.size + 'px' 
			})
			.html('<br/>'+meta_opts.msg_back)
			.click(function(){$album.hide();showOverview()})
			.addClass('pic-thumb')
			);
		}
		$.each(data.feed.entry,appendImage);
		
		function linkMapper(el){
			return [
				el.href,
				'<span>'+el.title+'</span> (<a href="'+el.childNodes[0].title+'" target="_blank">'+meta_opts.msg_source+'</a>)'
			]
		}
		
		if ($.fn.slimbox){
			$('a',$album).slimbox(meta_opts.slimboxparam,linkMapper); // @author ajaxforum
		}
		
		Cache[album] = $album;
	}
	
	$.getJSON('http://picasaweb.google.com/data/feed/api/user/' 
	+ user + '/albumid/' 
	+ album + '?kind=photo&access=public&alt=json-in-script&thumbsize='+meta_opts.size+'c&imgmax=800&callback=?',
	renderAlbum
	);
	};
	
	return this.each(showOverview);
};
})(jQuery);


/*
	Slimbox v2.02 - The ultimate lightweight Lightbox clone for jQuery
	(c) 2007-2009 Christophe Beyls <http://www.digitalia.be>
	MIT-style license.
*/
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