/**
 * Adapted from wp-admin/js/post.js
 */
(function ($, counter) {
	$(function () {
		var $content = $('#html-tag-description'),
			$count = $('#description-word-count').find('.word-count'),
			prevCount = 0,
			contentEditor;

		function update() {
			var text, count;

			if (!contentEditor || contentEditor.isHidden()) {
				text = $content.val();
			} else {
				text = contentEditor.getContent({format: 'raw'});
			}

			count = counter.count(text);

			if (count !== prevCount) {
				$count.text(count);
			}

			prevCount = count;
		}

		$(document).on('tinymce-editor-init', function (event, editor) {
			if (editor.id !== 'html-tag-description') {
				return;
			}

			contentEditor = editor;

			editor.on('nodechange keyup', _.debounce(update, 1000));
		});

		$content.on('input keyup', _.debounce(update, 1000));

		update();
	});
})(jQuery, new wp.utils.WordCounter());