<?php
use Index\Colour\Colour;

function byte_symbol(int $bytes, bool $decimal = false, array $symbols = ['', 'K', 'M', 'G', 'T', 'P', 'E', 'Z', 'Y']): string {
    if($bytes < 1)
        return '0 B';

    $divider = $decimal ? 1000 : 1024;
    $exp = floor(log($bytes) / log($divider));
    $bytes = $bytes / pow($divider, $exp);
    $symbol = $symbols[$exp];

    return sprintf("%.2f %s%sB", $bytes, $symbol, $symbol !== '' && !$decimal ? 'i' : '');
}

function get_country_name(string $code, string $locale = 'en'): string {
    $code = strtolower($code);
    switch($code) {
        case 'xx':
            return 'Unknown';
        case 'a1':
            return 'Anonymous Proxy';
        case 'a2':
            return 'Satellite Provider';
        case 'cn':
            return 'West Taiwan';
        case 'xm':
            return 'The Moon';
        default:
            return \Locale::getDisplayRegion("-{$code}", $locale);
    }
}

// render_error, render_info and render_info_or_json should be redone a bit better
// following a uniform format so there can be a global handler for em

function render_error(int $code, string $template = 'errors.%d'): string {
    return render_info(null, $code, $template);
}

function render_info(?string $message, int $httpCode, string $template = 'errors.%d'): string {
    http_response_code($httpCode);

    \Misuzu\Template::set('http_code', $httpCode);

    if(!empty($message))
        \Misuzu\Template::set('message', $message);

    $template = sprintf($template, $httpCode);

    return \Misuzu\Template::renderRaw(sprintf($template, $httpCode));
}

function html_colour(int|null|Colour $colour, $attribs = '--user-colour'): string {
    $colour = (string)($colour instanceof Colour ? $colour : Colour::fromMisuzu($colour ?? 0x40000000));

    if(is_string($attribs))
        $attribs = [ $attribs => '%s' ];

    if(!$attribs)
        $attribs = [
            'color' => '%s',
            '--user-colour' => '%s',
        ];

    $css = '';
    foreach($attribs as $name => $format)
        $css .= $name . ':' . sprintf($format, $colour) . ';';

    return $css;
}