<?php

declare(strict_types=1);

/**
 * Uruk International Prize - Root Router & Gateway Proxy
 * Supports both direct server document root and /backend/public dispatching.
 */

$uri = parse_url($_SERVER['REQUEST_URI'] ?? '/', PHP_URL_PATH);

// 1. If requesting the feasibility presentation or homepage in browser
if ($uri === '/' || $uri === '/feasibility' || $uri === '/docs') {
    $htmlDoc = __DIR__ . '/docs/uruk_project_feasibility_and_architecture.html';
    if (file_exists($htmlDoc)) {
        header('Content-Type: text/html; charset=UTF-8');
        readfile($htmlDoc);
        exit;
    }
}

// 2. Dispatch all API routes and gateway endpoints to backend/public/index.php
$backendIndex = __DIR__ . '/backend/public/index.php';
if (file_exists($backendIndex)) {
    require_once $backendIndex;
    exit;
}

http_response_code(404);
echo json_encode([
    'success' => false,
    'error' => 'Core Backend Engine not found.',
]);