(function($) {
	var target = null;
	var template = null;
	var lock = false;
	var cur_last = 0;
	var variables = {
		'last': 0
	}
	var settings = {
		'amount': '10',
		'address': 'comments.php',
		'format': 'json',
		'template': '.single_item',
		'trigger': '.get_more',
		'scroll': 'false',
		'offset': '100',
                'data':{},
		'spinner_code': ''
	}

	var methods = {
		init: function(options) {
			return this.each(function() {

				if (options) {
					$.extend(settings, options);
				}
				template = $(this).children(settings.template).wrap('<div/>').parent();
				template.css('display', 'none');
				$(this).append('<div class="more_loader_spinner">' + settings.spinner_code + '</div>');
				template.remove();
				target = $(this);
				if (settings.scroll == 'false') {
					$(this).find(settings.trigger).bind('click.more', methods.get_data);
					$(this).more('get_data');
				} else {
					if ($(this).height() <= $(this).attr('scrollHeight')) {
						target.more('get_data', settings.amount * 2);
					}
					$(this).bind('scroll.more', methods.check_scroll);
				}
			})
		
		},
		check_scroll: function() {
			if ((target.scrollTop() + target.height() + parseInt(settings.offset)) >= target.attr('scrollHeight') && lock == false) {
				target.more('get_data');
			}
		},
		debug: function() {
			var debug_string = '';
			$.each(variables, function(k, v) {
				debug_string += k + ' : ' + v + '\n';
			})
			alert(debug_string);
		},
		remove: function() {
			target.children(settings.trigger).unbind('.more');
			target.unbind('.more')
			target.children(settings.trigger).remove();
		
		},
		add_elements: function(data) {
			//alert('adding elements')
			var root = target
			//   alert(root.attr('id'))
			var counter = 0;
			if (data) {
				$(data).each(function() {
					counter++
					var t = template
					$.each(this, function(key, value) {
						if (t.find('.' + key)) t.find('.' + key).html(value);
					})
					//t.attr('id', 'more_element_'+ (variables.last++))
					if (settings.scroll == 'true') {
						//    root.append(t.html())
						root.children('.more_loader_spinner').before(t.html())
					} else {
						//alert('...')

						root.children(settings.trigger).before(t.html())

					}

					root.children(settings.template + ':last').attr('id', 'more_element_' + ((variables.last++) + 1));

				})

			} else methods.remove()
			//target.children('.more_loader_spinner').css('display', 'none');
			if (counter < settings.amount){
                            methods.remove();
                            target.children('.more_loader_spinner').html("<div style='line-height:3rem;text-align:center;'>亲，已经最后一页了哦！");
                        }

		},
		get_data: function() {
			//alert('getting data')

			var ile;
			lock = true;
			target.children(".more_loader_spinner").css('display', 'block');
			$(settings.trigger).css('display', 'none');
			if (typeof(arguments[0]) == 'number') ile = arguments[0];
			else {
				ile = settings.amount;
			}
			if(variables.last >= cur_last){
                        var postdata = settings.data;
                        postdata['last'] = variables.last;
                        postdata['amount'] = ile;
                        $.post(settings.address, postdata, function(data){  

				$(settings.trigger).css('display', 'block')
				methods.add_elements(data)
				lock = false;
			}, settings.format)
				cur_last  = cur_last+6;
			}
		
		}
	};
	$.fn.more = function(method) {
		if (methods[method]) {
			//load_flag = true;
			return methods[method].apply(this, Array.prototype.slice.call(arguments, 1));
		} else if (typeof method == 'object' || !method) {
			//load_flag = true;
			return methods.init.apply(this, arguments);
		} else $.error('Method ' + method + ' does not exist!');

	}

})(jQuery)