<?php

declare(strict_types=1);

namespace App\Modules\Platform\Http\Controllers;

use App\Http\Controllers\Controller;
use App\Modules\Platform\Capabilities\Capability;
use App\Modules\Platform\Capabilities\CapabilityRegistry;
use App\Modules\Platform\System\SystemEnvironment;
use Illuminate\Http\Request;
use Inertia\Inertia;
use Inertia\Response;

/**
 * "What am I running, and where did it come from?" — the one screen that
 * answers it, and the place the sidebar's version line goes.
 *
 * Read-only, and open to any staff member rather than only those who can
 * edit settings: a support reply that starts "go to About and tell me
 * the version" should not depend on the person having configuration
 * rights.
 *
 * The environment block is the exception, and carries the dashboard
 * System widget's gate verbatim (view_system_info + SystemUpdates) so
 * the two screens cannot disagree about who may read it — where an
 * installation is managed for you, the PHP build is not your concern,
 * which is exactly what that capability already encodes.
 */
class AboutController extends Controller
{
    public function __construct(
        private readonly CapabilityRegistry $capabilities,
        private readonly SystemEnvironment $environment,
    ) {}

    public function __invoke(Request $request): Response
    {
        $user = $request->user();
        assert($user !== null);

        $canSeeEnvironment = $user->can('view_system_info')
            && $this->capabilities->has(Capability::SystemUpdates);

        return Inertia::render('system/about', [
            'license' => 'GNU General Public License v2',
            'environment' => $canSeeEnvironment ? $this->environment->toArray() : null,
        ]);
    }
}