import CSSStyleDeclarationValueParser from './CSSStyleDeclarationValueParser.js';
import type ICSSStyleDeclarationPropertyValue from './ICSSStyleDeclarationPropertyValue.js';

/**
 * Computed style property parser.
 */
export default class CSSStyleDeclarationPropertyGetParser {
	/**
	 * Returns margin.
	 *
	 * @param properties Properties.
	 * @returns Property value
	 */
	public static getMargin(properties: {
		[k: string]: ICSSStyleDeclarationPropertyValue;
	}): ICSSStyleDeclarationPropertyValue | null {
		return this.getPaddingLikeProperty(
			['margin-top', 'margin-right', 'margin-bottom', 'margin-left'],
			properties
		);
	}

	/**
	 * Returns padding.
	 *
	 * @param properties Properties.
	 * @returns Property value
	 */
	public static getPadding(properties: {
		[k: string]: ICSSStyleDeclarationPropertyValue;
	}): ICSSStyleDeclarationPropertyValue | null {
		return this.getPaddingLikeProperty(
			['padding-top', 'padding-right', 'padding-bottom', 'padding-left'],
			properties
		);
	}

	/**
	 * Returns outline.
	 *
	 * @param properties Properties.
	 * @returns Property value
	 */
	public static getOutline(properties: {
		[k: string]: ICSSStyleDeclarationPropertyValue;
	}): ICSSStyleDeclarationPropertyValue | null {
		if (
			!properties['outline-color']?.value ||
			!properties['outline-style']?.value ||
			!properties['outline-width']?.value
		) {
			return null;
		}

		const important =
			properties['outline-color'].important &&
			properties['outline-style'].important &&
			properties['outline-width'].important;

		if (
			CSSStyleDeclarationValueParser.getGlobalExceptInitial(properties['outline-width'].value) &&
			properties['outline-width'].value === properties['outline-style'].value &&
			properties['outline-width'].value === properties['outline-color'].value
		) {
			return {
				important,
				value: properties['outline-width'].value
			};
		}

		const values = [];

		if (!CSSStyleDeclarationValueParser.getInitial(properties['outline-color']?.value)) {
			values.push(properties['outline-color'].value);
		}
		if (!CSSStyleDeclarationValueParser.getInitial(properties['outline-style']?.value)) {
			values.push(properties['outline-style'].value);
		}
		if (!CSSStyleDeclarationValueParser.getInitial(properties['outline-width'].value)) {
			values.push(properties['outline-width'].value);
		}

		return {
			important,
			value: values.join(' ')
		};
	}

	/**
	 * Returns border.
	 *
	 * @param properties Properties.
	 * @returns Property value
	 */
	public static getBorder(properties: {
		[k: string]: ICSSStyleDeclarationPropertyValue;
	}): ICSSStyleDeclarationPropertyValue | null {
		if (
			!properties['border-top-width']?.value ||
			properties['border-top-width']?.value !== properties['border-right-width']?.value ||
			properties['border-top-width']?.value !== properties['border-bottom-width']?.value ||
			properties['border-top-width']?.value !== properties['border-left-width']?.value ||
			!properties['border-top-style']?.value ||
			properties['border-top-style']?.value !== properties['border-right-style']?.value ||
			properties['border-top-style']?.value !== properties['border-bottom-style']?.value ||
			properties['border-top-style']?.value !== properties['border-left-style']?.value ||
			!properties['border-top-color']?.value ||
			properties['border-top-color']?.value !== properties['border-right-color']?.value ||
			properties['border-top-color']?.value !== properties['border-bottom-color']?.value ||
			properties['border-top-color']?.value !== properties['border-left-color']?.value ||
			!properties['border-image-source']?.value ||
			!properties['border-image-slice']?.value ||
			!properties['border-image-width']?.value ||
			!properties['border-image-outset']?.value ||
			!properties['border-image-repeat']?.value
		) {
			return null;
		}

		const important =
			properties['border-top-width'].important &&
			properties['border-right-width'].important &&
			properties['border-bottom-width'].important &&
			properties['border-left-width'].important &&
			properties['border-top-style'].important &&
			properties['border-right-style'].important &&
			properties['border-bottom-style'].important &&
			properties['border-left-style'].important &&
			properties['border-top-color'].important &&
			properties['border-right-color'].important &&
			properties['border-bottom-color'].important &&
			properties['border-left-color'].important &&
			properties['border-image-source'].important &&
			properties['border-image-slice'].important &&
			properties['border-image-width'].important &&
			properties['border-image-outset'].important &&
			properties['border-image-repeat'].important;

		if (
			CSSStyleDeclarationValueParser.getGlobalExceptInitial(properties['border-top-width'].value) ||
			CSSStyleDeclarationValueParser.getGlobalExceptInitial(properties['border-top-style'].value) ||
			CSSStyleDeclarationValueParser.getGlobalExceptInitial(properties['border-top-color'].value) ||
			CSSStyleDeclarationValueParser.getGlobalExceptInitial(
				properties['border-image-source'].value
			) ||
			CSSStyleDeclarationValueParser.getGlobalExceptInitial(
				properties['border-image-slice'].value
			) ||
			CSSStyleDeclarationValueParser.getGlobalExceptInitial(
				properties['border-image-width'].value
			) ||
			CSSStyleDeclarationValueParser.getGlobalExceptInitial(
				properties['border-image-outset'].value
			) ||
			CSSStyleDeclarationValueParser.getGlobalExceptInitial(properties['border-image-repeat'].value)
		) {
			if (
				properties['border-top-width'].value !== properties['border-top-style'].value ||
				properties['border-top-width'].value !== properties['border-top-color'].value ||
				properties['border-top-width'].value !== properties['border-image-source'].value ||
				properties['border-top-width'].value !== properties['border-image-slice'].value ||
				properties['border-top-width'].value !== properties['border-image-width'].value ||
				properties['border-top-width'].value !== properties['border-image-outset'].value ||
				properties['border-top-width'].value !== properties['border-image-repeat'].value
			) {
				return null;
			}

			return {
				important,
				value: properties['border-top-width'].value
			};
		}

		const values = [];

		if (!CSSStyleDeclarationValueParser.getInitial(properties['border-top-width'].value)) {
			values.push(properties['border-top-width'].value);
		}

		if (!CSSStyleDeclarationValueParser.getInitial(properties['border-top-style'].value)) {
			values.push(properties['border-top-style'].value);
		}

		if (!CSSStyleDeclarationValueParser.getInitial(properties['border-top-color'].value)) {
			values.push(properties['border-top-color'].value);
		}

		return {
			important,
			value: values.join(' ')
		};
	}

	/**
	 * Returns border.
	 *
	 * @param properties Properties.
	 * @returns Property value
	 */
	public static getBorderTop(properties: {
		[k: string]: ICSSStyleDeclarationPropertyValue;
	}): ICSSStyleDeclarationPropertyValue | null {
		return this.getBorderTopRightBottomLeft('top', properties);
	}

	/**
	 * Returns border.
	 *
	 * @param properties Properties.
	 * @returns Property value
	 */
	public static getBorderRight(properties: {
		[k: string]: ICSSStyleDeclarationPropertyValue;
	}): ICSSStyleDeclarationPropertyValue | null {
		return this.getBorderTopRightBottomLeft('right', properties);
	}

	/**
	 * Returns border.
	 *
	 * @param properties Properties.
	 * @returns Property value
	 */
	public static getBorderBottom(properties: {
		[k: string]: ICSSStyleDeclarationPropertyValue;
	}): ICSSStyleDeclarationPropertyValue | null {
		return this.getBorderTopRightBottomLeft('bottom', properties);
	}

	/**
	 * Returns border.
	 *
	 * @param properties Properties.
	 * @returns Property value
	 */
	public static getBorderLeft(properties: {
		[k: string]: ICSSStyleDeclarationPropertyValue;
	}): ICSSStyleDeclarationPropertyValue | null {
		return this.getBorderTopRightBottomLeft('left', properties);
	}

	/**
	 * Returns border.
	 *
	 * @param properties Properties.
	 * @returns Property value
	 */
	public static getBorderColor(properties: {
		[k: string]: ICSSStyleDeclarationPropertyValue;
	}): ICSSStyleDeclarationPropertyValue | null {
		return this.getPaddingLikeProperty(
			['border-top-color', 'border-right-color', 'border-bottom-color', 'border-left-color'],
			properties
		);
	}

	/**
	 * Returns border.
	 *
	 * @param properties Properties.
	 * @returns Property value
	 */
	public static getBorderWidth(properties: {
		[k: string]: ICSSStyleDeclarationPropertyValue;
	}): ICSSStyleDeclarationPropertyValue | null {
		return this.getPaddingLikeProperty(
			['border-top-width', 'border-right-width', 'border-bottom-width', 'border-left-width'],
			properties
		);
	}

	/**
	 * Returns border.
	 *
	 * @param properties Properties.
	 * @returns Property value
	 */
	public static getBorderStyle(properties: {
		[k: string]: ICSSStyleDeclarationPropertyValue;
	}): ICSSStyleDeclarationPropertyValue | null {
		return this.getPaddingLikeProperty(
			['border-top-style', 'border-right-style', 'border-bottom-style', 'border-left-style'],
			properties
		);
	}

	/**
	 * Returns border radius.
	 *
	 * @param properties Properties.
	 * @returns Property value
	 */
	public static getBorderRadius(properties: {
		[k: string]: ICSSStyleDeclarationPropertyValue;
	}): ICSSStyleDeclarationPropertyValue | null {
		return this.getPaddingLikeProperty(
			[
				'border-top-left-radius',
				'border-top-right-radius',
				'border-bottom-right-radius',
				'border-bottom-left-radius'
			],
			properties
		);
	}

	/**
	 * Returns border image.
	 *
	 * @param properties Properties.
	 * @returns Property value
	 */
	public static getBorderImage(properties: {
		[k: string]: ICSSStyleDeclarationPropertyValue;
	}): ICSSStyleDeclarationPropertyValue | null {
		if (
			!properties['border-image-source']?.value ||
			!properties['border-image-slice']?.value ||
			!properties['border-image-width']?.value ||
			!properties['border-image-outset']?.value ||
			!properties['border-image-repeat']?.value
		) {
			return null;
		}

		const important =
			properties['border-image-source'].important &&
			properties['border-image-slice'].important &&
			properties['border-image-width'].important &&
			properties['border-image-outset'].important &&
			properties['border-image-repeat'].important;

		if (
			CSSStyleDeclarationValueParser.getGlobal(properties['border-image-source'].value) ||
			CSSStyleDeclarationValueParser.getGlobal(properties['border-image-slice'].value) ||
			CSSStyleDeclarationValueParser.getGlobal(properties['border-image-width'].value) ||
			CSSStyleDeclarationValueParser.getGlobal(properties['border-image-outset'].value) ||
			CSSStyleDeclarationValueParser.getGlobal(properties['border-image-repeat'].value)
		) {
			if (
				properties['border-image-source'].value !== properties['border-image-slice'].value ||
				properties['border-image-source'].value !== properties['border-image-width'].value ||
				properties['border-image-source'].value !== properties['border-image-outset'].value ||
				properties['border-image-source'].value !== properties['border-image-repeat'].value
			) {
				return null;
			}
			return {
				important,
				value: properties['border-image-source'].value
			};
		}

		return {
			important,
			value: `${properties['border-image-source'].value} ${properties['border-image-slice'].value} / ${properties['border-image-width'].value} / ${properties['border-image-outset'].value} ${properties['border-image-repeat'].value}`
		};
	}

	/**
	 * Returns background.
	 *
	 * @param properties Properties.
	 * @returns Property value
	 */
	public static getBackground(properties: {
		[k: string]: ICSSStyleDeclarationPropertyValue;
	}): ICSSStyleDeclarationPropertyValue | null {
		if (
			!properties['background-image']?.value ||
			!properties['background-repeat']?.value ||
			!properties['background-attachment']?.value ||
			!properties['background-position-x']?.value ||
			!properties['background-position-y']?.value ||
			!properties['background-color']?.value ||
			!properties['background-size']?.value ||
			!properties['background-origin']?.value ||
			!properties['background-clip']?.value
		) {
			return null;
		}

		const important =
			properties['background-image'].important &&
			properties['background-repeat'].important &&
			properties['background-attachment'].important &&
			properties['background-position-x'].important &&
			properties['background-position-y'].important &&
			properties['background-color'].important &&
			properties['background-size'].important &&
			properties['background-origin'].important &&
			properties['background-clip'].important;

		if (
			CSSStyleDeclarationValueParser.getGlobalExceptInitial(properties['background-image'].value) ||
			CSSStyleDeclarationValueParser.getGlobalExceptInitial(
				properties['background-repeat'].value
			) ||
			CSSStyleDeclarationValueParser.getGlobalExceptInitial(
				properties['background-attachment'].value
			) ||
			CSSStyleDeclarationValueParser.getGlobalExceptInitial(
				properties['background-position-x'].value
			) ||
			CSSStyleDeclarationValueParser.getGlobalExceptInitial(
				properties['background-position-y'].value
			) ||
			CSSStyleDeclarationValueParser.getGlobalExceptInitial(properties['background-color'].value) ||
			CSSStyleDeclarationValueParser.getGlobalExceptInitial(properties['background-size'].value) ||
			CSSStyleDeclarationValueParser.getGlobalExceptInitial(
				properties['background-origin'].value
			) ||
			CSSStyleDeclarationValueParser.getGlobalExceptInitial(properties['background-clip'].value)
		) {
			if (
				properties['background-image'].value !== properties['background-repeat'].value ||
				properties['background-image'].value !== properties['background-attachment'].value ||
				properties['background-image'].value !== properties['background-position-x'].value ||
				properties['background-image'].value !== properties['background-position-y'].value ||
				properties['background-image'].value !== properties['background-color'].value ||
				properties['background-image'].value !== properties['background-size'].value ||
				properties['background-image'].value !== properties['background-origin'].value ||
				properties['background-image'].value !== properties['background-clip'].value
			) {
				return null;
			}

			return {
				important,
				value: properties['background-image'].value
			};
		}

		const values = [];

		if (!CSSStyleDeclarationValueParser.getInitial(properties['background-image'].value)) {
			values.push(properties['background-image'].value);
		}

		if (
			!CSSStyleDeclarationValueParser.getInitial(properties['background-position-x'].value) &&
			!CSSStyleDeclarationValueParser.getInitial(properties['background-position-y'].value) &&
			!CSSStyleDeclarationValueParser.getInitial(properties['background-size'].value)
		) {
			values.push(
				`${properties['background-position-x'].value} ${properties['background-position-y'].value} / ${properties['background-size'].value}`
			);
		} else if (
			!CSSStyleDeclarationValueParser.getInitial(properties['background-position-x'].value) &&
			!CSSStyleDeclarationValueParser.getInitial(properties['background-position-y'].value)
		) {
			values.push(
				`${properties['background-position-x'].value} ${properties['background-position-y'].value}`
			);
		}

		if (!CSSStyleDeclarationValueParser.getInitial(properties['background-repeat'].value)) {
			values.push(properties['background-repeat'].value);
		}

		if (!CSSStyleDeclarationValueParser.getInitial(properties['background-attachment'].value)) {
			values.push(properties['background-attachment'].value);
		}

		if (!CSSStyleDeclarationValueParser.getInitial(properties['background-origin'].value)) {
			values.push(properties['background-origin'].value);
		}

		if (!CSSStyleDeclarationValueParser.getInitial(properties['background-clip'].value)) {
			values.push(properties['background-clip'].value);
		}

		if (!CSSStyleDeclarationValueParser.getInitial(properties['background-color'].value)) {
			values.push(properties['background-color'].value);
		}

		return {
			important,
			value: values.join(' ')
		};
	}

	/**
	 * Returns background position.
	 *
	 * @param properties Properties.
	 * @returns Property value
	 */
	public static getBackgroundPosition(properties: {
		[k: string]: ICSSStyleDeclarationPropertyValue;
	}): ICSSStyleDeclarationPropertyValue | null {
		if (
			!properties['background-position-x']?.value ||
			!properties['background-position-y']?.value
		) {
			return null;
		}

		const important =
			properties['background-position-x'].important &&
			properties['background-position-y'].important;
		if (
			CSSStyleDeclarationValueParser.getGlobal(properties['background-position-x'].value) ||
			CSSStyleDeclarationValueParser.getGlobal(properties['background-position-y'].value)
		) {
			if (properties['background-position-x'].value !== properties['background-position-y'].value) {
				return null;
			}

			return {
				important,
				value: properties['background-position-x'].value
			};
		}

		const positionX = properties['background-position-x'].value.replace(/ *, */g, ',').split(',');
		const positionY = properties['background-position-y'].value.replace(/ *, */g, ',').split(',');
		const parts = [];

		for (let i = 0; i < positionX.length; i++) {
			parts.push(`${positionX[i]} ${positionY[i]}`);
		}

		return {
			important,
			value: parts.join(', ')
		};
	}

	/**
	 * Returns flex.
	 *
	 * @param properties Properties.
	 * @returns Property value
	 */
	public static getFlex(properties: {
		[k: string]: ICSSStyleDeclarationPropertyValue;
	}): ICSSStyleDeclarationPropertyValue | null {
		if (
			!properties['flex-grow']?.value ||
			!properties['flex-shrink']?.value ||
			!properties['flex-basis']?.value
		) {
			return null;
		}

		const important =
			properties['flex-grow'].important &&
			properties['flex-shrink'].important &&
			properties['flex-basis'].important;

		if (
			CSSStyleDeclarationValueParser.getGlobal(properties['flex-grow'].value) ||
			CSSStyleDeclarationValueParser.getGlobal(properties['flex-shrink'].value) ||
			CSSStyleDeclarationValueParser.getGlobal(properties['flex-basis'].value)
		) {
			if (
				properties['flex-grow'].value !== properties['flex-shrink'].value ||
				properties['flex-grow'].value !== properties['flex-basis'].value
			) {
				return null;
			}

			return {
				important,
				value: properties['flex-grow'].value
			};
		}

		return {
			important,
			value: `${properties['flex-grow'].value} ${properties['flex-shrink'].value} ${properties['flex-basis'].value}`
		};
	}

	/**
	 * Returns flex.
	 *
	 * @param properties Properties.
	 * @returns Property value
	 */
	public static getFont(properties: {
		[k: string]: ICSSStyleDeclarationPropertyValue;
	}): ICSSStyleDeclarationPropertyValue | null {
		if (
			!properties['font-size']?.value ||
			!properties['font-family']?.value ||
			!properties['font-weight']?.value ||
			!properties['font-style']?.value ||
			!properties['font-variant']?.value ||
			!properties['font-stretch']?.value ||
			!properties['line-height']?.value
		) {
			return null;
		}

		const important =
			properties['font-size'].important &&
			properties['font-family'].important &&
			properties['font-weight'].important &&
			properties['font-style'].important &&
			properties['font-variant'].important &&
			properties['font-stretch'].important &&
			properties['line-height'].important;

		if (
			CSSStyleDeclarationValueParser.getGlobal(properties['font-size'].value) ||
			CSSStyleDeclarationValueParser.getGlobal(properties['font-family'].value) ||
			CSSStyleDeclarationValueParser.getGlobal(properties['font-weight'].value) ||
			CSSStyleDeclarationValueParser.getGlobal(properties['font-style'].value) ||
			CSSStyleDeclarationValueParser.getGlobal(properties['font-variant'].value) ||
			CSSStyleDeclarationValueParser.getGlobal(properties['font-stretch'].value) ||
			CSSStyleDeclarationValueParser.getGlobal(properties['line-height'].value)
		) {
			if (
				properties['font-size'].value !== properties['font-family'].value ||
				properties['font-size'].value !== properties['font-weight'].value ||
				properties['font-size'].value !== properties['font-style'].value ||
				properties['font-size'].value !== properties['font-variant'].value ||
				properties['font-size'].value !== properties['font-stretch'].value ||
				properties['font-size'].value !== properties['line-height'].value
			) {
				return null;
			}

			return {
				important,
				value: properties['font-size'].value
			};
		}

		const values = [];

		if (properties['font-style'].value !== 'normal') {
			values.push(properties['font-style'].value);
		}
		if (properties['font-variant'].value !== 'normal') {
			values.push(properties['font-variant'].value);
		}
		if (properties['font-weight'].value !== 'normal') {
			values.push(properties['font-weight'].value);
		}
		if (properties['font-stretch'].value !== 'normal') {
			values.push(properties['font-stretch'].value);
		}

		if (properties['line-height'].value !== 'normal') {
			values.push(`${properties['font-size'].value} / ${properties['line-height'].value}`);
		} else {
			values.push(properties['font-size'].value);
		}

		values.push(properties['font-family'].value);

		return {
			important,
			value: values.join(' ')
		};
	}

	/**
	 * Returns border.
	 *
	 * @param properties Properties.
	 * @param position
	 * @returns Property value
	 */
	private static getBorderTopRightBottomLeft(
		position: 'top' | 'right' | 'bottom' | 'left',
		properties: {
			[k: string]: ICSSStyleDeclarationPropertyValue;
		}
	): ICSSStyleDeclarationPropertyValue | null {
		if (
			!properties[`border-${position}-width`]?.value ||
			!properties[`border-${position}-style`]?.value ||
			!properties[`border-${position}-color`]?.value
		) {
			return null;
		}

		const important =
			properties[`border-${position}-width`].important &&
			properties[`border-${position}-style`].important &&
			properties[`border-${position}-color`].important;

		if (
			CSSStyleDeclarationValueParser.getGlobalExceptInitial(
				properties[`border-${position}-width`].value
			) &&
			properties[`border-${position}-width`].value ===
				properties[`border-${position}-style`].value &&
			properties[`border-${position}-width`].value === properties[`border-${position}-color`].value
		) {
			return {
				important,
				value: properties[`border-${position}-width`].value
			};
		}

		const values = [];

		if (!CSSStyleDeclarationValueParser.getInitial(properties[`border-${position}-width`].value)) {
			values.push(properties[`border-${position}-width`].value);
		}
		if (!CSSStyleDeclarationValueParser.getInitial(properties[`border-${position}-style`]?.value)) {
			values.push(properties[`border-${position}-style`].value);
		}
		if (!CSSStyleDeclarationValueParser.getInitial(properties[`border-${position}-color`]?.value)) {
			values.push(properties[`border-${position}-color`].value);
		}

		return {
			important,
			value: values.join(' ')
		};
	}

	/**
	 * Returns a padding like property.
	 *
	 * @param properties Properties.
	 * @param position
	 * @param propertyNames
	 * @returns Property value
	 */
	private static getPaddingLikeProperty(
		propertyNames: [string, string, string, string],
		properties: {
			[k: string]: ICSSStyleDeclarationPropertyValue;
		}
	): ICSSStyleDeclarationPropertyValue | null {
		if (
			!properties[propertyNames[0]]?.value ||
			!properties[propertyNames[1]]?.value ||
			!properties[propertyNames[2]]?.value ||
			!properties[propertyNames[3]]?.value
		) {
			return null;
		}

		const important =
			properties[propertyNames[0]].important &&
			properties[propertyNames[1]].important &&
			properties[propertyNames[2]].important &&
			properties[propertyNames[3]].important;

		if (
			CSSStyleDeclarationValueParser.getGlobal(properties[propertyNames[0]].value) ||
			CSSStyleDeclarationValueParser.getGlobal(properties[propertyNames[1]].value) ||
			CSSStyleDeclarationValueParser.getGlobal(properties[propertyNames[2]].value) ||
			CSSStyleDeclarationValueParser.getGlobal(properties[propertyNames[3]].value)
		) {
			if (
				properties[propertyNames[0]].value !== properties[propertyNames[1]].value ||
				properties[propertyNames[0]].value !== properties[propertyNames[2]].value ||
				properties[propertyNames[0]].value !== properties[propertyNames[3]].value
			) {
				return null;
			}
			return {
				important,
				value: properties[propertyNames[0]].value
			};
		}

		const values = [properties[propertyNames[0]].value];

		if (
			properties[propertyNames[1]].value !== properties[propertyNames[0]].value ||
			properties[propertyNames[2]].value !== properties[propertyNames[0]].value ||
			properties[propertyNames[3]].value !== properties[propertyNames[1]].value
		) {
			values.push(properties[propertyNames[1]].value);
		}

		if (
			properties[propertyNames[2]].value !== properties[propertyNames[0]].value ||
			properties[propertyNames[3]].value !== properties[propertyNames[1]].value
		) {
			values.push(properties[propertyNames[2]].value);
		}

		if (properties[propertyNames[3]].value !== properties[propertyNames[1]].value) {
			values.push(properties[propertyNames[3]].value);
		}

		return {
			important,
			value: values.join(' ')
		};
	}
}