/*!
 * Jodit Editor (https://xdsoft.net/jodit/)
 * Licensed under GNU General Public License version 2 or later or a commercial license or MIT;
 * For GPL see LICENSE-GPL.txt in the project root for license information.
 * For MIT see LICENSE-MIT.txt in the project root for license information.
 * For commercial licenses see https://xdsoft.net/jodit/commercial/
 * Copyright (c) 2013-2019 Valeriy Chupurnov. All rights reserved. https://xdsoft.net
 */

import { Config } from '../Config';
import { Dom } from '../modules/Dom';
import { css } from '../modules/helpers/';
import { IDictionary, IJodit } from '../types';
import { IControlType } from '../types/toolbar';

const pluginKey: string = 'copyformat';

/**
 * Plug-in copy and paste formatting from elements
 *
 * @module copyformat
 */

const copyStyles: string[] = [
	'fontWeight',
	'fontStyle',
	'fontSize',
	'color',
	'margin',
	'padding',
	'borderWidth',
	'borderStyle',
	'borderColor',
	'borderRadius',
	'backgroundColor',
	'textDecorationLine',
	'fontFamily'
];

const getStyle = (
	editor: IJodit,
	key: string,
	box: HTMLElement,
	defaultStyles: IDictionary<string | number>
): string | number | undefined => {
	let result: string | number | undefined = css(box, key);

	// TODO need check 0 == "0" and another cases
	if (result === defaultStyles[key]) {
		if (
			box.parentNode &&
			box !== editor.editor &&
			box.parentNode !== editor.editor
		) {
			result = getStyle(
				editor,
				key,
				box.parentNode as HTMLElement,
				defaultStyles
			);
		} else {
			result = void 0;
		}
	}

	return result;
};

const getStyles = (
	editor: IJodit,
	box: HTMLElement,
	defaultStyles: IDictionary<string | number>
): IDictionary<string | number | undefined> => {
	const result: IDictionary<string | number | undefined> = {};

	if (box) {
		copyStyles.forEach((key: string) => {
			result[key] = getStyle(editor, key, box, defaultStyles);
			if (key.match(/border(Style|Color)/) && !result.borderWidth) {
				result[key] = void 0;
			}
		});
	}

	return result;
};

Config.prototype.controls.copyformat = {
	exec: (editor: IJodit, current: Node | false) => {
		if (current) {
			if (editor.buffer[pluginKey]) {
				editor.buffer[pluginKey] = false;
				editor.events.off(editor.editor, 'mouseup.' + pluginKey);
			} else {
				const defaultStyles: IDictionary<string | number> = {},
					box: HTMLElement =
						(Dom.up(
							current,
							(elm: Node | null) =>
								elm && elm.nodeType !== Node.TEXT_NODE,
							editor.editor
						) as HTMLElement) || editor.editor;

				const ideal: HTMLElement = editor.create.inside.span();
				editor.editor.appendChild(ideal);

				copyStyles.forEach((key: string) => {
					defaultStyles[key] = css(ideal, key);
				});

				if (ideal !== editor.editor) {
					Dom.safeRemove(ideal);
				}

				const format: IDictionary<
					string | number | undefined
				> = getStyles(editor, box, defaultStyles);

				const onMouseDown = () => {
					editor.buffer[pluginKey] = false;
					const currentNode:
						| Node
						| false = editor.selection.current();

					if (currentNode) {
						if (currentNode.nodeName === 'IMG') {
							css(currentNode as HTMLElement, format);
						} else {
							editor.selection.applyCSS(format);
						}
					}

					editor.events.off(editor.editor, 'mouseup.' + pluginKey);
				};

				editor.events.on(
					editor.editor,
					'mouseup.' + pluginKey,
					onMouseDown
				);

				editor.buffer[pluginKey] = true;
			}
		}
	},

	isActive: (editor: IJodit): boolean => {
		return !!editor.buffer[pluginKey];
	},

	tooltip: 'Paint format'
} as IControlType;