<?php

declare(strict_types=1);

namespace App\Http\Middleware;

use Closure;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\Config;
use Illuminate\Support\Facades\Vite;
use Symfony\Component\HttpFoundation\Response;

class SecureHeaders
{
    /**
     * Enumerate headers which you do not want in your application's responses.
     * Great starting point would be to go check out @Scott_Helme's:
     * https://securityheaders.com/
     *
     * @var string[]
     */
    private $unwantedHeaderList = [
        'X-Powered-By',
        'Server',
    ];

    /**
     * Handle an incoming request.
     *
     * @param  \Closure(\Illuminate\Http\Request):(\Illuminate\Http\Response)  $next
     */
    public function handle(Request $request, Closure $next): Response
    {
        $appUrl           = Config::string('app.url');
        $appDebug         = Config::boolean('app.debug');
        $telescopeEnabled = Config::boolean('telescope.enabled', false);

        // * For Vite DEV
        $host          = \parse_url($appUrl, \PHP_URL_HOST);
        $viteDevOrigin = $appDebug && \is_string($host) && $host !== ''
            ? "https://{$host}:4443"
            : '';
        $viteDevSocket = $appDebug && \is_string($host) && $host !== ''
            ? "wss://{$host}:4443"
            : '';
        Vite::useCspNonce(Vite::cspNonce());
        $nonce = Vite::cspNonce();
        app()->instance('csp_nonce', $nonce);

        $jsBo            = $request->routeIs('bo*') ? "'unsafe-eval'" : '';
        $cspReportUri    = route('cspReportUri');
        $reportUri       =
            \sprintf(' report-to default; report-uri %s ;', \parse_url($cspReportUri, \PHP_URL_PATH));

        $jsdelivrUrl        = 'https://cdn.jsdelivr.net';
        $openStreetMapTiles = 'https://*.tile.openstreetmap.org';

        $this->removeUnwantedHeaders($this->unwantedHeaderList);
        $response = $next($request);

        $response->headers->set('Referrer-Policy', 'no-referrer-when-downgrade');
        $response->headers->set('X-Content-Type-Options', 'nosniff');
        $response->headers->set('X-XSS-Protection', '1; mode=block');
        $response->headers->set('X-Frame-Options', 'SAMEORIGIN');
        $response->headers->set('Strict-Transport-Security', 'max-age=31536000; includeSubDomains; preload');

        // * Ignore CSP on some conditions.
        if (
            $appDebug && (
                $response->isClientError() || // Ignition
                $response->isServerError() || // Ignition
                Vite::isRunningHot()       || // Vite
                ($telescopeEnabled && str_starts_with($request->path(), 'telescope')) // Telescope
            )
        ) {
            return $response;
        }

        $cspPolicies = [
            "default-src 'none';",
            "base-uri 'self';",
            "manifest-src 'self';",
            // * CKEDITOR Specific https://ckeditor.com/docs/ckeditor5/latest/installation/advanced/csp.html
            "connect-src 'self' " . implode(' ', [
                'https://yl.s-web.fr/',
                // * BAN address autocomplete (api-adresse.data.gouv.fr)
                'https://api-adresse.data.gouv.fr',
                // * VITE DEV
                $viteDevSocket,
                $viteDevOrigin,
            ]) . ';',
            "img-src 'self' data: blob: " . implode(' ', [
                $viteDevOrigin,
                $openStreetMapTiles,
            ]) . ' data:;',
            'child-src ' . implode(' ', []) . ';',
            "object-src 'none';",
            "font-src 'self' data: " . \implode(' ', [
                // * VITE DEV
                $viteDevOrigin,
            ]) . ';',
            // ! Using CKEditor will must have unsafe-inline style
            "style-src 'self' 'unsafe-inline' " . \implode(' ', [
                $jsdelivrUrl,
                // * File Manager
                $jsdelivrUrl,
                // * VITE DEV
                $viteDevOrigin,
            ]) . ';',

            // ! If you dont use ckeditor use this
            // "style-src 'self' 'nonce-$nonce';",
            "script-src 'self' 'nonce-$nonce' 'strict-dynamic' " . \implode(' ', [
                'https:  blob:',
                $jsBo,
                // * VITE DEV
                $viteDevOrigin,
            ]) . ';',
        ];
        $response->headers->set(
            'Content-Security-Policy',
            implode(' ', $cspPolicies) . $reportUri
        );
        $response->headers->set('Feature-Policy', 'fullscreen \'self\'; geolocation \'self\';');
        $response->headers->set('Reporting-Endpoints', 'default="' . $cspReportUri . '"');

        return $response;
    }

    /**
     * Remove unwanted headers
     *
     * @param  string[]  $headerList  List of headers to remove from the response
     * @return void
     */
    private function removeUnwantedHeaders(array $headerList)
    {
        foreach ($headerList as $header) {
            header_remove($header);
        }
    }
}