/**
 * Plugin: "remove_button" (selectize.js)
 * Copyright (c) 2013 Brian Reavis & contributors
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this
 * file except in compliance with the License. You may obtain a copy of the License at:
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software distributed under
 * the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF
 * ANY KIND, either express or implied. See the License for the specific language
 * governing permissions and limitations under the License.
 *
 * @author Brian Reavis <brian@thirdroute.com>
 */

Selectize.define('remove_button', function(options) {
	if (this.settings.mode === 'single') return;

	options = $.extend({
		label     : '&times;',
		title     : 'Remove',
		className : 'remove',
		append    : true
	}, options);

	var self = this;
	var html = '<a href="javascript:void(0)" class="' + options.className + '" tabindex="-1" title="' + escape_html(options.title) + '">' + options.label + '</a>';

	/**
	 * Appends an element as a child (with raw HTML).
	 *
	 * @param {string} html_container
	 * @param {string} html_element
	 * @return {string}
	 */
	var append = function(html_container, html_element) {
		var pos = html_container.search(/(<\/[^>]+>\s*)$/);
		return html_container.substring(0, pos) + html_element + html_container.substring(pos);
	};

	this.setup = (function() {
		var original = self.setup;
		return function() {
			// override the item rendering method to add the button to each
			if (options.append) {
				var render_item = self.settings.render.item;
				self.settings.render.item = function(data) {
					return append(render_item.apply(this, arguments), html);
				};
			}

			original.apply(this, arguments);

			// add event listener
			this.$control.on('click', '.' + options.className, function(e) {
				e.preventDefault();
				if (self.isLocked) return;

				var $item = $(e.currentTarget).parent();
				self.setActiveItem($item);
				if (self.deleteSelection()) {
					self.setCaret(self.items.length);
				}
			});

		};
	})();

});