<?php
declare(strict_types=1);

$requestUri = $_SERVER['REQUEST_URI'] ?? '/';
$path = rawurldecode(parse_url($requestUri, PHP_URL_PATH) ?: '/');

$publicRoot = __DIR__;
$adminReactRoot = __DIR__ . '/adminex';

$adminReactFile = null;
if (strpos($path, '/adminex/') === 0) {
    $adminReactFile = $adminReactRoot . substr($path, strlen('/adminex'));
}

$sendStaticFile = static function (string $filePath): void {
    $extension = strtolower(pathinfo($filePath, PATHINFO_EXTENSION));
    $contentTypes = [
        'css' => 'text/css; charset=UTF-8',
        'js' => 'application/javascript; charset=UTF-8',
        'json' => 'application/json; charset=UTF-8',
        'map' => 'application/json; charset=UTF-8',
        'svg' => 'image/svg+xml',
        'png' => 'image/png',
        'jpg' => 'image/jpeg',
        'jpeg' => 'image/jpeg',
        'gif' => 'image/gif',
        'webp' => 'image/webp',
        'ico' => 'image/x-icon',
    ];

    if (isset($contentTypes[$extension])) {
        header('Content-Type: ' . $contentTypes[$extension]);
    }

    header('Content-Length: ' . (string) filesize($filePath));
    readfile($filePath);
};

if ($adminReactFile && is_file($adminReactFile)) {
    $sendStaticFile($adminReactFile);
    return true;
}

$publicFile = realpath($publicRoot . $path);
if ($path !== '/' && $publicFile !== false && str_starts_with($publicFile, $publicRoot) && is_file($publicFile)) {
    $sendStaticFile($publicFile);
    return true;
}

$publicIndexFile = realpath(rtrim($publicRoot . $path, '/') . '/index.html');
if ($path !== '/' && rtrim($path, '/') !== '/back' && $publicIndexFile !== false && str_starts_with($publicIndexFile, $publicRoot) && is_file($publicIndexFile)) {
    $sendStaticFile($publicIndexFile);
    return true;
}

$legacyPublicFile = realpath(__DIR__ . $path);
if (
    str_starts_with($path, '/img/')
    && $path !== '/'
    && $legacyPublicFile !== false
    && str_starts_with($legacyPublicFile, __DIR__ . '/img')
    && is_file($legacyPublicFile)
) {
    $sendStaticFile($legacyPublicFile);
    return true;
}

if (strpos($path, '/back') === 0) {
    require __DIR__ . '/back/ex.php';
    return true;
}

if (strpos($path, '/api') === 0) {
    require __DIR__ . '/api/ex.php';
    return true;
}

require __DIR__ . '/ex.php';
return true;