const config = {
	'title': false,
	'stylesSet': false,
	'customConfig': '',
	'contentsCss': '',
	'toolbarGroups': [
		{ name: 'spec' },
		{ name: 'styles' },
		{ name: 'basicstyles', groups: ['basicstyles', 'cleanup', 'bidi'] },
		{ name: 'colors' },
		{ name: 'paragraph', groups: ['list', 'indent', 'blocks', 'align'] },
		{ name: 'links' },
		{ name: 'insert' },
		{ name: 'document', groups: ['mode', 'document', 'doctools'] },
		{ name: 'others' }
	],

	'removePlugins': 'liststyle',
	'removeButtons': 'Format,Undo,Redo,Cut,Copy,Paste,Anchor,Strike,Subscript,Superscript,Image,SelectAll,Source',
	'removeDialogTabs': 'link:advanced;link:target;image:advanced;images:advanced',

	'extraPlugins': 'plain,signature',

	'allowedContent': true,
	'extraAllowedContent': true,

	'fillEmptyBlocks': false,
	'ignoreEmptyParagraph': true,
	'disableNativeSpellChecker': false,

	'colorButton_enableAutomatic': false,
	'colorButton_enableMore': true,

	'font_defaultLabel': 'Arial',
	'fontSize_defaultLabel': '13',
	'fontSize_sizes': '10/10px;12/12px;13/13px;14/14px;16/16px;18/18px;20/20px;24/24px;28/28px;36/36px;48/48px'
},

/**
 * @type {Object}
 */
htmlEditorLangsMap = {
	'ar_sa': 'ar-sa',
	'bg_bg': 'bg',
	'cs_CZ': 'cs',
	'de_de': 'de',
	'el_gr': 'el',
	'es_es': 'es',
	'et_ee': 'et',
	'fr_fr': 'fr',
	'hu_hu': 'hu',
	'is_is': 'is',
	'it_it': 'it',
	'ja_jp': 'ja',
	'ko_kr': 'ko',
	'lt_lt': 'lt',
	'lv_lv': 'lv',
	'fa_ir': 'fa',
	'nb_no': 'nb',
	'nl_nl': 'nl',
	'pl_pl': 'pl',
	'pt_br': 'pt-br',
	'pt_pt': 'pt',
	'ro_ro': 'ro',
	'ru_ru': 'ru',
	'sk_sk': 'sk',
	'sl_si': 'sl',
	'sv_se': 'sv',
	'tr_tr': 'tr',
	'uk_ua': 'uk',
	'zh_cn': 'zh-cn',
	'zh_tw': 'zh'
};

export function createCKEditor(element)
{
	const language = rl.settings.get('Language'),
		allowSource = !!rl.settings.app('allowHtmlEditorSourceButton'),
		biti = !!rl.settings.app('allowHtmlEditorBitiButtons');

	if ((allowSource || !biti) && !config.toolbarGroups.__cfgInited) {
		config.toolbarGroups.__cfgInited = true;

		if (allowSource) {
			config.removeButtons = config.removeButtons.replace(',Source', '');
		}

		if (!biti) {
			config.removePlugins += (config.removePlugins ? ',' : '') + 'bidi';
		}
	}

	config.enterMode = CKEDITOR.ENTER_BR;
	config.shiftEnterMode = CKEDITOR.ENTER_P;

	config.language = htmlEditorLangsMap[(language || 'en').toLowerCase()] || 'en';
	if (CKEDITOR.env) {
		CKEDITOR.env.isCompatible = true;
	}

	const editor = CKEDITOR.appendTo(element, config);

	editor.on('key', event => !(event && event.data && 'Tab' == event.data.key));

	if (window.FileReader) {
		editor.on('drop', event => {
			if (0 < event.data.dataTransfer.getFilesCount()) {
				const file = event.data.dataTransfer.getFile(0);
				if (file && event.data.dataTransfer.id && file.type && file.type.match(/^image/i)) {
					const id = event.data.dataTransfer.id,
						imageId = `[img=${id}]`,
						reader = new FileReader();

					reader.onloadend = () => {
						if (reader.result) {
							if ('wysiwyg' === editor.mode) {
								try {
									editor.setData(editor.getData().replace(imageId, `<img src="${reader.result}" />`));
								} catch (e) {} // eslint-disable-line no-empty
							}
						}
					};

					reader.readAsDataURL(file);

					event.data.dataTransfer.setData('text/html', imageId);
				}
			}
		});
	}

	return editor;
}