index.php

<?php
// Main entry point - handles installation check and redirects
declare(strict_types=1);

// Check if system is installed
$installLockFile = __DIR__ . '/install.lock';
$isInstalled = file_exists($installLockFile);

// If not installed, redirect to installer
if (!$isInstalled) {
    // Check if we're already on the install page to avoid redirect loops
    $currentPath = $_SERVER['REQUEST_URI'] ?? '';
    if (!str_starts_with($currentPath, '/install')) {
        header('Location: /install/');
        exit;
    }
}

// If installed, redirect to admin login
if ($isInstalled) {
    // Check if we're already on the admin page to avoid redirect loops
    $currentPath = $_SERVER['REQUEST_URI'] ?? '';
    if (!str_starts_with($currentPath, '/admin')) {
        header('Location: /admin/');
        exit;
    }
}

// Fallback - should not reach here in normal operation
http_response_code(200);
header('Content-Type: text/plain; charset=utf-8');
echo 'Codev Support Chat backend is installed. Use /api for API routes.';