/**
 * Pagify jQuery plugin
 *
 * Copyright (C) Martin Vlcek, 2011
 *
 * License: GPL 3
 */

(function($) {

var defaults = {
items: null,
pageSize: 10,
location: "after",
wrap: false,
currentPage: 1,
onPage: null
};

var methods = {

init: function(options) {
       return this.each(function() {
   var $this = $(this);
var opts = $.extend(defaults, options);
   $this.data('pagify', opts);
   var $items = opts.items ? $this.find(opts.items) : $this.children();
   var numPages = Math.ceil($items.size() / opts.pageSize);
   if (numPages > 1) {
   var $container = $this;
   if (opts.wrap) {
    $container = $this.wrap('<div class="pagify-container"></div>').closest('.pagify-container');
   }
   var nav = '<div class="pagify">';
   for (var i=1; i<=numPages; i++) nav += ' <a href="#" class="pagify-'+i+'">'+i+'</a> ';
   nav += '</div>';
   switch (opts.location) {
  case "before": $container.prepend(nav); break;
  case "both"  : $container.prepend(nav).append(nav); break;
  default      : $container.append(nav);
   }
   $container.find('.pagify a').click(function(e) {
    methods.setPage.apply($this, [ $(e.target).text() ]);
   })
   methods.setPage.apply($this, [ opts.currentPage ]);
   }
       });
},

setPage: function(page) {
var num = parseInt(page);
return this.each(function() {
var $this = $(this);
var opts = $this.data('pagify');
var $container = opts.wrap ? $this.closest('.pagify-container') : $this;
if ($container.find('.pagify a.current.pagify-'+page).size() == 0) {
   var $items = opts.items ? $this.find(opts.items) : $this.children();
   if (!opts.wrap) $items = $items.filter(':not(.pagify)');
   var numPages = Math.ceil($items.size() / opts.pageSize);
   if (page < 1) page = 1; else if (page > numPages) page = numPages;
   $items.hide();
   $items.slice((page-1)*opts.pageSize, page*opts.pageSize).show();
   $container.find('.pagify a').removeClass('current').
    filter('.pagify-'+page).addClass('current');
   if (opts.onPage) opts.onPage.apply(this, [ this, page ]);
}
})
},
}

$.fn.pagify = function(method) {
   if (methods[method]) {
   return methods[method].apply(this, Array.prototype.slice.call(arguments, 1));
   } else if (typeof method === 'object' || !method) {
   return methods.init.apply(this, arguments);
} else {
   $.error( 'Method ' +  method + ' does not exist on jQuery.pagify' );
}    
};

})(jQuery);