(function($) {
$.fn.flickr = function(o){
var s = {
    api_key: null,              
    type: null,                 
    photoset_id: null,          
    text: null,			        
    user_id: null,              
    group_id: null,             
    tags: null,                 
    tag_mode: 'any',            
    sort: 'relevance',    
    thumb_size: 's',      
    size: null,           
    per_page: 100,        
    page: 1,     	      
    attr: '',             
    api_url: null,        
    params: '',           
    api_callback: '?',    
    callback: null        

  };
  if(o) $.extend(s, o);
  return this.each(function(){
		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';
          };
		  var flickrLink = 'http://www.flickr.com/photos/' + r.photoset.owner + '/' + photo['id'];
		  //console.log(flickrLink);
          list.append('<li><a href="'+h+'" '+s.attr+' title="'+flickrLink+'"><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);