<?php
declare(strict_types=1);

/**
 * Bootstrap dell'applicazione.
 * Carica config, autoloader, error handler, DB, sessione, helpers.
 */

// 1. PSR-4 autoloader minimale (App\* -> /app/*)
spl_autoload_register(function (string $class): void {
    $prefix = 'App\\';
    if (!str_starts_with($class, $prefix)) return;
    $relative = substr($class, strlen($prefix));
    $file = __DIR__ . '/app/' . str_replace('\\', '/', $relative) . '.php';
    if (is_file($file)) {
        require $file;
    }
});

// 2. Carica configurazione
$config = require __DIR__ . '/config/config.php';

date_default_timezone_set($config['app']['timezone']);

// 3. Error handler
if ($config['app']['debug']) {
    error_reporting(E_ALL);
    ini_set('display_errors', '1');
} else {
    error_reporting(E_ALL);
    ini_set('display_errors', '0');
    ini_set('log_errors', '1');
    ini_set('error_log', $config['storage']['path'] . '/logs/php-error.log');
}

set_exception_handler(function (\Throwable $e) use ($config): void {
    $logFile = $config['storage']['path'] . '/logs/app.log';
    $msg = sprintf(
        "[%s] %s: %s in %s:%d\n%s\n\n",
        date('Y-m-d H:i:s'),
        get_class($e),
        $e->getMessage(),
        $e->getFile(),
        $e->getLine(),
        $e->getTraceAsString()
    );
    @file_put_contents($logFile, $msg, FILE_APPEND);

    if (PHP_SAPI === 'cli') {
        fwrite(STDERR, $msg);
        exit(1);
    }

    http_response_code(500);
    if (str_contains($_SERVER['REQUEST_URI'] ?? '', '/api/')) {
        header('Content-Type: application/json; charset=utf-8');
        echo json_encode([
            'error'   => 'server_error',
            'message' => $config['app']['debug'] ? $e->getMessage() : 'Errore interno',
        ]);
    } else {
        header('Content-Type: text/html; charset=utf-8');
        echo '<h1>Errore 500</h1>';
        if ($config['app']['debug']) {
            echo '<pre>' . htmlspecialchars($msg) . '</pre>';
        }
    }
});

// 4. Bootstrap servizi
\App\Core\Database::boot($config['db']);
\App\Core\Config::set($config);

// 5. Sessione (solo per richieste web, non CLI/API stateless)
if (PHP_SAPI !== 'cli' && !str_contains($_SERVER['REQUEST_URI'] ?? '', '/api/')) {
    $sess = $config['session'];
    session_name($sess['name']);
    session_set_cookie_params([
        'lifetime' => $sess['lifetime'] * 60,
        'path'     => '/',
        'secure'   => $sess['secure'],
        'httponly' => true,
        'samesite' => $sess['samesite'],
    ]);
    if (session_status() === PHP_SESSION_NONE) {
        session_start();
    }
}