const PRESET_COLOR_MAP = {
	'light-blue': '#7cd6fd',
	'blue': '#5e64ff',
	'violet': '#743ee2',
	'red': '#ff5858',
	'orange': '#ffa00a',
	'yellow': '#feef72',
	'green': '#28a745',
	'light-green': '#98d85b',
	'purple': '#b554ff',
	'magenta': '#ffa3ef',
	'black': '#36114C',
	'grey': '#bdd3e6',
	'light-grey': '#f0f4f7',
	'dark-grey': '#b8c2cc'
};

export const DEFAULT_COLORS = ['light-blue', 'blue', 'violet', 'red', 'orange',
	'yellow', 'green', 'light-green', 'purple', 'magenta'];

function limitColor(r){
	if (r > 255) return 255;
	else if (r < 0) return 0;
	return r;
}

export function lightenDarkenColor(color, amt) {
	let col = getColor(color);
	let usePound = false;
	if (col[0] == "#") {
		col = col.slice(1);
		usePound = true;
	}
	let num = parseInt(col,16);
	let r = limitColor((num >> 16) + amt);
	let b = limitColor(((num >> 8) & 0x00FF) + amt);
	let g = limitColor((num & 0x0000FF) + amt);
	return (usePound?"#":"") + (g | (b << 8) | (r << 16)).toString(16);
}

export function isValidColor(string) {
	// https://stackoverflow.com/a/8027444/6495043
	return /(^#[0-9A-F]{6}$)|(^#[0-9A-F]{3}$)/i.test(string);
}

export const getColor = (color) => {
	return PRESET_COLOR_MAP[color] || color;
};