let tty = require("tty")

let isColorSupported =
	!("NO_COLOR" in process.env || process.argv.includes("--no-color")) &&
	("FORCE_COLOR" in process.env ||
		process.argv.includes("--color") ||
		process.platform === "win32" ||
		(tty.isatty(1) && process.env.TERM !== "dumb") ||
		"CI" in process.env)

function formatter(open, close, replace = open) {
	return (input) => {
		let string = "" + input
		let index = string.indexOf(close, open.length)
		return !~index
			? open + string + close
			: open + replaceClose(string, close, replace, index) + close
	}
}

function replaceClose(string, close, replace, index) {
	let start = string.substring(0, index) + replace
	let end = string.substring(index + close.length)
	let nextIndex = end.indexOf(close)
	return !~nextIndex ? start + end : start + replaceClose(end, close, replace, nextIndex)
}

function createColors(enabled = isColorSupported) {
	return {
		isColorSupported: enabled,
		reset: enabled ? (s) => `\x1b[0m${s}\x1b[0m` : String,
		bold: enabled ? formatter("\x1b[1m", "\x1b[22m", "\x1b[22m\x1b[1m") : String,
		dim: enabled ? formatter("\x1b[2m", "\x1b[22m", "\x1b[22m\x1b[2m") : String,
		italic: enabled ? formatter("\x1b[3m", "\x1b[23m") : String,
		underline: enabled ? formatter("\x1b[4m", "\x1b[24m") : String,
		inverse: enabled ? formatter("\x1b[7m", "\x1b[27m") : String,
		hidden: enabled ? formatter("\x1b[8m", "\x1b[28m") : String,
		strikethrough: enabled ? formatter("\x1b[9m", "\x1b[29m") : String,
		black: enabled ? formatter("\x1b[30m", "\x1b[39m") : String,
		red: enabled ? formatter("\x1b[31m", "\x1b[39m") : String,
		green: enabled ? formatter("\x1b[32m", "\x1b[39m") : String,
		yellow: enabled ? formatter("\x1b[33m", "\x1b[39m") : String,
		blue: enabled ? formatter("\x1b[34m", "\x1b[39m") : String,
		magenta: enabled ? formatter("\x1b[35m", "\x1b[39m") : String,
		cyan: enabled ? formatter("\x1b[36m", "\x1b[39m") : String,
		white: enabled ? formatter("\x1b[37m", "\x1b[39m") : String,
		gray: enabled ? formatter("\x1b[90m", "\x1b[39m") : String,
		bgBlack: enabled ? formatter("\x1b[40m", "\x1b[49m") : String,
		bgRed: enabled ? formatter("\x1b[41m", "\x1b[49m") : String,
		bgGreen: enabled ? formatter("\x1b[42m", "\x1b[49m") : String,
		bgYellow: enabled ? formatter("\x1b[43m", "\x1b[49m") : String,
		bgBlue: enabled ? formatter("\x1b[44m", "\x1b[49m") : String,
		bgMagenta: enabled ? formatter("\x1b[45m", "\x1b[49m") : String,
		bgCyan: enabled ? formatter("\x1b[46m", "\x1b[49m") : String,
		bgWhite: enabled ? formatter("\x1b[47m", "\x1b[49m") : String,
	}
}

module.exports = createColors()
module.exports.createColors = createColors