const $ = { enabled:true };

const CODES = {
  // modifiers
  reset: fmt(0, 0),
  bold: fmt(1, 22),
  dim: fmt(2, 22),
  italic: fmt(3, 23),
  underline: fmt(4, 24),
  inverse: fmt(7, 27),
  hidden: fmt(8, 28),
  strikethrough: fmt(9, 29),
  // colors
  black: fmt(30, 39),
  red: fmt(31, 39),
  green: fmt(32, 39),
  yellow: fmt(33, 39),
  blue: fmt(34, 39),
  magenta: fmt(35, 39),
  cyan: fmt(36, 39),
  white: fmt(37, 39),
  gray: fmt(90, 39),
  // background colors
  bgBlack: fmt(40, 49),
  bgRed: fmt(41, 49),
  bgGreen: fmt(42, 49),
  bgYellow: fmt(43, 49),
  bgBlue: fmt(44, 49),
  bgMagenta: fmt(45, 49),
  bgCyan: fmt(46, 49),
  bgWhite: fmt(47, 49)
};

function fmt(x, y) {
	return {
		open: `\x1b[${x}m`,
		close: `\x1b[${y}m`,
		rgx: new RegExp(`\\x1b\\[${y}m`, 'g')
	}
}

function run(key, str) {
	let tmp = CODES[key];
	return tmp.open + str.replace(tmp.rgx, tmp.open) + tmp.close;
}

function exec(key, str) {
	str += '';
	if (!$.enabled) return str;
	let arr = this.keys;
	while (arr.length > 0) {
		str = run(arr.shift(), str);
	}
	this.keys.push(key);
	return str;
}

function attach(key) {
	let ctx = { keys:[key] };
	let fn = exec.bind(ctx, key);
	for (let k in CODES) {
		Reflect.defineProperty(fn, k, {
			get() {
				ctx.keys.push(k);
				return fn;
			}
		});
	}
	return fn;
}

for (let k in CODES) {
	$[k] = attach(k);
}

module.exports = $;