/*
 * jQuery Flickr - jQuery plug-in
 * Version 1.0, Released 2008.04.17
 *
 * Copyright (c) 2008 Daniel MacDonald (www.projectatomic.com)
 * Dual licensed GPL http://www.gnu.org/licenses/gpl.html 
 * and MIT http://www.opensource.org/licenses/mit-license.php
 */
(function($) {
$.fn.flickr = function(o){
	var s = {
		api_key: null,              // [string]    required, see http://www.flickr.com/services/api/misc.api_keys.html
		type: null,                 // [string]    allowed values: 'photoset', 'search', default: 'flickr.photos.getRecent'
		photoset_id: null,          // [string]    required, for type=='photoset'  
		text: null,			            // [string]    for type=='search' free text search
		user_id: null,              // [string]    for type=='search' search by user id
		group_id: null,             // [string]    for type=='search' search by group id
		tags: null,                 // [string]    for type=='search' comma separated list
		tag_mode: 'any',            // [string]    for type=='search' allowed values: 'any' (OR), 'all' (AND)
		sort: 'relevance',    // [string]    for type=='search' allowed values: 'date-posted-asc', 'date-posted-desc', 'date-taken-asc', 'date-taken-desc', 'interestingness-desc', 'interestingness-asc', 'relevance'
		thumb_size: 's',            // [string]    allowed values: 's' (75x75), 't' (100x?), 'm' (240x?)
		size: null,                 // [string]    allowed values: 'm' (240x?), 'b' (1024x?), 'o' (original), default: (500x?)
		per_page: 100,              // [integer]   allowed values: max of 500
		page: 1,     	              // [integer]   see paging notes
		attr: '',                   // [string]    optional, attributes applied to thumbnail <a> tag
		api_url: null,              // [string]    optional, custom url that returns flickr JSON or JSON-P 'photos' or 'photoset'
		params: '',                 // [string]    optional, custom arguments, see http://www.flickr.com/services/api/flickr.photos.search.html
		api_callback: '?',          // [string]    optional, custom callback in flickr JSON-P response
		callback: null              // [function]  optional, callback function applied to entire <ul>
		
		// PAGING NOTES: jQuery Flickr plug-in does not provide paging functionality, but does provide hooks for a custom paging routine
		// within the <ul> created by the plug-in, there are two hidden <input> tags, 
		// input:eq(0): current page, input:eq(1): total number of pages, input:eq(2): images per page, input:eq(3): total number of images
		
		// SEARCH NOTES: when setting type to 'search' at least one search parameter  must also be passed text, user_id, group_id, or tags
		
		// SIZE NOTES: photos must allow viewing original size for size 'o' to function, if not, default size is shown
	};
	if(o) $.extend(s, o);
	return this.each(function(){
		// create unordered list to contain flickr images
		var list = $('<ul>').appendTo(this);
		var url = $.flickr.format(s);
		
		$.getJSON(url, function(r){
			if (r.stat != "ok"){
				for (i in r){
					$('<li>').text(i+': '+ r[i]).appendTo(list);
				};
			} else {
				if (s.type == 'photoset') r.photos = r.photoset;
				// add hooks to access paging data
				list.append('<input type="hidden" value="'+r.photos.page+'" />');
				list.append('<input type="hidden" value="'+r.photos.pages+'" />');
				list.append('<input type="hidden" value="'+r.photos.perpage+'" />');
				list.append('<input type="hidden" value="'+r.photos.total+'" />');
				for (var i=0; i<r.photos.photo.length; i++){
					var photo = r.photos.photo[i];
					// format thumbnail url
					var t = 'http://farm'+photo['farm']+'.static.flickr.com/'+photo['server']+'/'+photo['id']+'_'+photo['secret']+'_'+s.thumb_size+'.jpg';
					//format image url
					var h = 'http://farm'+photo['farm']+'.static.flickr.com/'+photo['server']+'/'+photo['id']+'_';
					
					switch (s.size){
						case 'm':
							h += photo['secret'] + '_m.jpg';
						break;
						case 'b':
							h += photo['secret'] + '_b.jpg';
						break;
						case 'o':
							if (photo['originalsecret'] && photo['originalformat']) {
								h += photo['originalsecret'] + '_o.' + photo['originalformat'];
							} else {
								h += photo['secret'] + '_b.jpg';
							};
						break;
						default:
							h += photo['secret'] + '.jpg';
					};					
					list.append('<li><a rel="id_'+photo['id']+'" href="'+h+'" '+s.attr+' title="'+photo['title']+'"><img src="'+t+'" alt="'+photo['title']+'" /></a></li>');
				};
				
				if (s.callback) s.callback(list);
			};
		});
	});
};
// static function to format the flickr API url according to the plug-in settings 
$.flickr = {
    format: function(s){
        if (s.url) return s.url;
        var url = 'http://api.flickr.com/services/rest/?format=json&jsoncallback='+s.api_callback+'&api_key='+s.api_key;
        switch (s.type){
            case 'photoset':
                url += '&method=flickr.photosets.getPhotos&photoset_id=' + s.photoset_id;
                break;
            case 'search':
                url += '&method=flickr.photos.search&sort=' + s.sort;
                if (s.user_id) url += '&user_id=' + s.user_id;
                if (s.group_id) url += '&group_id=' + s.group_id;
                if (s.tags) url += '&tags=' + s.tags;
                if (s.tag_mode) url += '&tag_mode=' + s.tag_mode;
                if (s.text) url += '&text=' + s.text;
                break;
            default:
                url += '&method=flickr.photos.getRecent';
        };
        if (s.size == 'o') url += '&extras=original_format';
        url += '&per_page=' + s.per_page + '&page=' + s.page + s.params;
        return url;
    }
};
})(jQuery);