/**
 * External dependencies
 */
import styled from '@emotion/styled';
import { css } from '@emotion/react';

/**
 * Internal dependencies
 */
import { COLORS, reduceMotion } from '../../utils';
import type {
	AlignmentMatrixControlProps,
	AlignmentMatrixControlCellProps,
} from '../types';

export const rootBase = () => {
	return css`
		border-radius: 2px;
		box-sizing: border-box;
		direction: ltr;
		display: grid;
		grid-template-columns: repeat( 3, 1fr );
		outline: none;
	`;
};

const rootSize = ( { size = 92 } ) => {
	return css`
		grid-template-rows: repeat( 3, calc( ${ size }px / 3 ) );
		width: ${ size }px;
	`;
};

export const Root = styled.div< {
	size: AlignmentMatrixControlProps[ 'width' ];
} >`
	${ rootBase };

	border: 1px solid transparent;
	cursor: pointer;
	grid-template-columns: auto;

	${ rootSize };
`;

export const Row = styled.div`
	box-sizing: border-box;
	display: grid;
	grid-template-columns: repeat( 3, 1fr );
`;

const pointActive = ( {
	isActive,
}: Pick< AlignmentMatrixControlCellProps, 'isActive' > ) => {
	const boxShadow = isActive ? `0 0 0 2px ${ COLORS.gray[ 900 ] }` : null;
	const pointColor = isActive ? COLORS.gray[ 900 ] : COLORS.gray[ 400 ];
	const pointColorHover = isActive ? COLORS.gray[ 900 ] : COLORS.ui.theme;

	return css`
		box-shadow: ${ boxShadow };
		color: ${ pointColor };

		*:hover > & {
			color: ${ pointColorHover };
		}
	`;
};

export const pointBase = (
	props: Pick< AlignmentMatrixControlCellProps, 'isActive' >
) => {
	return css`
		background: currentColor;
		box-sizing: border-box;
		display: grid;
		margin: auto;
		transition: all 120ms linear;

		${ reduceMotion( 'transition' ) }
		${ pointActive( props ) }
	`;
};

export const Point = styled.span`
	height: 6px;
	width: 6px;
	${ pointBase }
`;

export const Cell = styled.span`
	appearance: none;
	border: none;
	box-sizing: border-box;
	margin: 0;
	display: flex;
	position: relative;
	outline: none;
	align-items: center;
	justify-content: center;
	padding: 0;
`;