/*
 * Fuel UX Combobox
 * https://github.com/ExactTarget/fuelux
 *
 * Copyright (c) 2014 ExactTarget
 * Licensed under the BSD New license.
 */

// -- BEGIN UMD WRAPPER PREFACE --

// For more information on UMD visit:
// https://github.com/umdjs/umd/blob/master/jqueryPlugin.js

(function (factory) {
	if (typeof define === 'function' && define.amd) {
		// if AMD loader is available, register as an anonymous module.
		define(['jquery'], factory);
	} else if (typeof exports === 'object') {
		// Node/CommonJS
		module.exports = factory(require('jquery'));
	} else {
		// OR use browser globals if AMD is not present
		factory(jQuery);
	}
}(function ($) {
	// -- END UMD WRAPPER PREFACE --

	// -- BEGIN MODULE CODE HERE --

	var old = $.fn.combobox;


	// COMBOBOX CONSTRUCTOR AND PROTOTYPE

	var Combobox = function (element, options) {
		this.$element = $(element);
		this.options = $.extend({}, $.fn.combobox.defaults, options);

		this.$dropMenu = this.$element.find('.dropdown-menu');
		this.$input = this.$element.find('input');
		this.$button = this.$element.find('.btn');

		this.$element.on('click.fu.combobox', 'a', $.proxy(this.itemclicked, this));
		this.$element.on('change.fu.combobox', 'input', $.proxy(this.inputchanged, this));
		this.$element.on('shown.bs.dropdown', $.proxy(this.menuShown, this));

		// set default selection
		this.setDefaultSelection();

		// if dropdown is empty, disable it
		var items = this.$dropMenu.children('li');
		if( items.length === 0) {
			this.$button.addClass('disabled');
		}

	};

	Combobox.prototype = {

		constructor: Combobox,

		destroy: function () {
			this.$element.remove();
			// remove any external bindings
			// [none]

			// set input value attrbute in markup
			this.$element.find('input').each(function () {
				$(this).attr('value', $(this).val());
			});

			// empty elements to return to original markup
			// [none]

			return this.$element[0].outerHTML;
		},

		doSelect: function ($item) {
			if (typeof $item[0] !== 'undefined') {
				this.$selectedItem = $item;
				this.$input.val(this.$selectedItem.text().trim());
			} else {
				this.$selectedItem = null;
			}
		},

		menuShown: function () {
			if (this.options.autoResizeMenu) {
				this.resizeMenu();
			}
		},

		resizeMenu: function () {
			var width = this.$element.outerWidth();
			this.$dropMenu.outerWidth(width);
		},

		selectedItem: function () {
			var item = this.$selectedItem;
			var data = {};

			if (item) {
				var txt = this.$selectedItem.text().trim();
				data = $.extend({
					text: txt
				}, this.$selectedItem.data());
			} else {
				data = {
					text: this.$input.val()
				};
			}

			return data;
		},

		selectByText: function (text) {
			var $item = $([]);
			this.$element.find('li').each(function () {
				if ((this.textContent || this.innerText || $(this).text() || '').toLowerCase() === (text || '').toLowerCase()) {
					$item = $(this);
					return false;
				}
			});
			this.doSelect($item);
		},

		selectByValue: function (value) {
			var selector = 'li[data-value="' + value + '"]';
			this.selectBySelector(selector);
		},

		selectByIndex: function (index) {
			// zero-based index
			var selector = 'li:eq(' + index + ')';
			this.selectBySelector(selector);
		},

		selectBySelector: function (selector) {
			var $item = this.$element.find(selector);
			this.doSelect($item);
		},

		setDefaultSelection: function () {
			var selector = 'li[data-selected=true]:first';
			var item = this.$element.find(selector);

			if (item.length > 0) {
				// select by data-attribute
				this.selectBySelector(selector);
				item.removeData('selected');
				item.removeAttr('data-selected');
			}
		},

		enable: function () {
			this.$element.removeClass('disabled');
			this.$input.removeAttr('disabled');
			this.$button.removeClass('disabled');
		},

		disable: function () {
			this.$element.addClass('disabled');
			this.$input.attr('disabled', true);
			this.$button.addClass('disabled');
		},

		itemclicked: function (e) {
			this.$selectedItem = $(e.target).parent();

			// set input text and trigger input change event marked as synthetic
			this.$input.val(this.$selectedItem.text().trim()).trigger('change', {
				synthetic: true
			});

			// pass object including text and any data-attributes
			// to onchange event
			var data = this.selectedItem();

			// trigger changed event
			this.$element.trigger('changed.fu.combobox', data);

			e.preventDefault();

			// return focus to control after selecting an option
			this.$element.find('.dropdown-toggle').focus();
		},

		inputchanged: function (e, extra) {
			// skip processing for internally-generated synthetic event
			// to avoid double processing
			if (extra && extra.synthetic) return;
			var val = $(e.target).val();
			this.selectByText(val);

			// find match based on input
			// if no match, pass the input value
			var data = this.selectedItem();
			if (data.text.length === 0) {
				data = {
					text: val
				};
			}

			// trigger changed event
			this.$element.trigger('changed.fu.combobox', data);
		}
	};


	// COMBOBOX PLUGIN DEFINITION

	$.fn.combobox = function (option) {
		var args = Array.prototype.slice.call(arguments, 1);
		var methodReturn;

		var $set = this.each(function () {
			var $this = $(this);
			var data = $this.data('fu.combobox');
			var options = typeof option === 'object' && option;

			if (!data) {
				$this.data('fu.combobox', (data = new Combobox(this, options)));
			}

			if (typeof option === 'string') {
				methodReturn = data[option].apply(data, args);
			}
		});

		return (methodReturn === undefined) ? $set : methodReturn;
	};

	$.fn.combobox.defaults = {
		autoResizeMenu: true
	};

	$.fn.combobox.Constructor = Combobox;

	$.fn.combobox.noConflict = function () {
		$.fn.combobox = old;
		return this;
	};

	// DATA-API

	$(document).on('mousedown.fu.combobox.data-api', '[data-initialize=combobox]', function (e) {
		var $control = $(e.target).closest('.combobox');
		if (!$control.data('fu.combobox')) {
			$control.combobox($control.data());
		}
	});

	// Must be domReady for AMD compatibility
	$(function () {
		$('[data-initialize=combobox]').each(function () {
			var $this = $(this);
			if (!$this.data('fu.combobox')) {
				$this.combobox($this.data());
			}
		});
	});

	// -- BEGIN UMD WRAPPER AFTERWORD --
}));
// -- END UMD WRAPPER AFTERWORD --
