/*!
 * 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 { IDictionary } from '../../types';
import { isPlainObject } from './checker/isPlainObject';
import { isNumeric } from './checker/isNumeric';
import { normilizeCSSValue } from './normalize/normilizeCSSValue';
import { camelCase } from './string/camelCase';
import { fromCamelCase } from './string/fromCamelCase';

/**
 * Get the value of a computed style property for the first element in the set of matched elements or set one or
 * more CSS properties for every matched element
 * @param {HTMLElement} element
 * @param {string|object} key An object of property-value pairs to set. A CSS property name.
 * @param {string|int} value A value to set for the property.
 * @param {boolean} onlyStyleMode Get value from style attribute, without calculating
 */
export const css = (
	element: HTMLElement,
	key: string | IDictionary<number | string | null | undefined>,
	value?: string | number,
	onlyStyleMode: boolean = false
): string | number => {
	const numberFieldsReg = /^left|top|bottom|right|width|min|max|height|margin|padding|font-size/i;

	if (isPlainObject(key) || value !== undefined) {
		const setValue = (
			elm: HTMLElement,
			_key: string,
			_value: string | number | undefined
		) => {
			if (
				_value !== undefined &&
				_value !== null &&
				numberFieldsReg.test(_key) &&
				isNumeric(_value.toString())
			) {
				_value = parseInt(_value.toString(), 10) + 'px';
			}

			if (
				_value !== undefined &&
				css(elm, _key, void 0, true) !== normilizeCSSValue(_key, _value)
			) {
				(elm.style as any)[_key] = _value;
			}
		};

		if (isPlainObject(key)) {
			const keys: string[] = Object.keys(key);
			for (let j = 0; j < keys.length; j += 1) {
				setValue(element, camelCase(keys[j]), (key as any)[keys[j]]);
			}
		} else {
			setValue(element, camelCase(key as string), value);
		}

		return '';
	}

	const key2: string = fromCamelCase(key as string) as string,
		doc: Document = element.ownerDocument || document,
		win = doc ? doc.defaultView || (doc as any).parentWindow : false;

	const currentValue: string | undefined = (element.style as any)[
		key as string
	];

	let result: string | number =
		currentValue !== undefined && currentValue !== ''
			? currentValue
			: win && !onlyStyleMode
			? win.getComputedStyle(element).getPropertyValue(key2)
			: '';

	if (
		numberFieldsReg.test(key as string) &&
		/^[\-+]?[0-9.]+px$/.test(result.toString())
	) {
		result = parseInt(result.toString(), 10);
	}

	return normilizeCSSValue(key as string, result);
};