<?php

namespace App\Game;

use App\Engine\Art;
use App\Engine\HdRenderer;
use JumPHP\Kernel\Engine;

/** The graphics mode, saved in the options: 'retro' (the software renderer, 320 x 200) or 'hd' (the GPU). */
final class Graphics
{
    public static function mode(Engine $engine): string
    {
        return $engine->options->get('graphics', 'retro') === 'hd' && $engine->gl()->isAvailable() ? 'hd' : 'retro';
    }

    public static function toggle(Engine $engine): void
    {
        if (!$engine->gl()->isAvailable()) {
            return;
        }
        $engine->options->set('graphics', self::mode($engine) === 'hd' ? 'retro' : 'hd');
    }

    /** The HD renderer, enabled, when the HD mode is on; null otherwise (and the HD layer off). */
    public static function hd(Engine $engine): ?HdRenderer
    {
        if (self::mode($engine) !== 'hd') {
            self::retro($engine);
            return null;
        }
        $hd = HdRenderer::get($engine->gl(), Art::get($engine->config->path('assets/data/art.pak')));
        $hd->enable();
        return $hd;
    }

    /** Back to the plain 2D output (the retro renderer draws its own picture). */
    public static function retro(Engine $engine): void
    {
        if ($engine->gl()->isAvailable()) {
            HdRenderer::get($engine->gl(), Art::get($engine->config->path('assets/data/art.pak')))->disable();
        }
    }
}