/**
 * segmented-controllers
 * @param {type} $
 * @param {type} window
 * @param {type} document
 * @param {type} undefined
 * @returns {undefined}
 */
(function($, window, document, name, undefined) {

	var CLASS_CONTROL_ITEM = $.className('control-item');
	var CLASS_SEGMENTED_CONTROL = $.className('segmented-control');
	var CLASS_SEGMENTED_CONTROL_VERTICAL = $.className('segmented-control-vertical');
	var CLASS_CONTROL_CONTENT = $.className('control-content');
	var CLASS_TAB_BAR = $.className('bar-tab');
	var CLASS_TAB_ITEM = $.className('tab-item');
	var CLASS_SLIDER_ITEM = $.className('slider-item');

	var handle = function(event, target) {
		if (target.classList && (target.classList.contains(CLASS_CONTROL_ITEM) || target.classList.contains(CLASS_TAB_ITEM))) {
			if (target.parentNode && target.parentNode.classList && target.parentNode.classList.contains(CLASS_SEGMENTED_CONTROL_VERTICAL)) {
				//vertical 如果preventDefault会导致无法滚动
			} else {
				event.preventDefault(); //stop hash change				
			}
			//			if (target.hash) {
			return target;
			//			}
		}
		return false;
	};

	$.registerTarget({
		name: name,
		index: 80,
		handle: handle,
		target: false
	});

	window.addEventListener('tap', function(e) {

		var targetTab = $.targets.tab;
		if (!targetTab) {
			return;
		}
		var activeTab;
		var activeBodies;
		var targetBody;
		var className = $.className('active');
		var classSelector = '.' + className;
		var segmentedControl = targetTab.parentNode;

		for (; segmentedControl && segmentedControl !== document; segmentedControl = segmentedControl.parentNode) {
			if (segmentedControl.classList.contains(CLASS_SEGMENTED_CONTROL)) {
				activeTab = segmentedControl.querySelector(classSelector + '.' + CLASS_CONTROL_ITEM);
				break;
			} else if (segmentedControl.classList.contains(CLASS_TAB_BAR)) {
				activeTab = segmentedControl.querySelector(classSelector + '.' + CLASS_TAB_ITEM);
			}
		}

		if (activeTab) {
			activeTab.classList.remove(className);
		}

		var isLastActive = targetTab === activeTab;
		if (targetTab) {
			targetTab.classList.add(className);
		}

		if (!targetTab.hash) {
			return;
		}
		targetBody = document.getElementById(targetTab.hash.replace('#', ''));

		if (!targetBody) {
			return;
		}
		if (!targetBody.classList.contains(CLASS_CONTROL_CONTENT)) { //tab bar popover
			targetTab.classList[isLastActive ? 'remove' : 'add'](className);
			return;
		}
		if (isLastActive) { //same
			return;
		}
		var parentNode = targetBody.parentNode;
		activeBodies = parentNode.querySelectorAll('.' + CLASS_CONTROL_CONTENT + classSelector);
		for (var i = 0; i < activeBodies.length; i++) {
			var activeBody = activeBodies[i];
			activeBody.parentNode === parentNode && activeBody.classList.remove(className);
		}

		targetBody.classList.add(className);

		var contents = [];
		var _contents = parentNode.querySelectorAll('.' + CLASS_CONTROL_CONTENT);
		for (var i = 0; i < _contents.length; i++) { //查找直属子节点
			_contents[i].parentNode === parentNode && (contents.push(_contents[i]));
		}
		$.trigger(targetBody, $.eventName('shown', name), {
			tabNumber: Array.prototype.indexOf.call(contents, targetBody)
		});
		e.detail && e.detail.gesture.preventDefault(); //fixed hashchange
	});

})(mui, window, document, 'tab');