import { unwrap } from "./unwrap.js";

export function isEmail(addr: string): boolean {
	return String(addr)
		.toLowerCase()
		.match(
			/^(([^<>()[\]\\.,;:\s@"]+(\.[^<>()[\]\\.,;:\s@"]+)*)|.(".+"))@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\])|(([a-zA-Z\-0-9]+\.)+[a-zA-Z]{2,}))$/
		) !== null;
}

export function isIPAddr4(addr: string): boolean {
	if (/^(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)$/.test(addr)) {
		return (true)
	}
	return false;
}

export function hexToRgb(hex: string): { r: number; g: number; b: number; } | null {
    const result = /^#?([a-f\d]{2})([a-f\d]{2})([a-f\d]{2})$/i.exec(hex);
    return result ? {
        r: parseInt(result[1], 16),
        g: parseInt(result[2], 16),
        b: parseInt(result[3], 16)
    } : null;
}

export function isBrightColor(color: string): boolean {
    const cv = unwrap(hexToRgb(color));
    if ((cv.r * 0.299 + cv.g * 0.587 + cv.b * 0.114) > 140) {
        return true;
    } else {
        return false;
    }
}