<?php

require_once __DIR__ . '/faceai_config.php';

$config = faceai_config();

try {
    $raceId = faceai_request_value('raceId');
    $raceSlug = faceai_request_value('raceSlug');
    $raceName = faceai_request_value('raceName', $raceSlug !== '' ? $raceSlug : $raceId);
    $raceYear = faceai_request_value('raceYear');
    $raceMonthFolder = faceai_request_value('raceMonthFolder');
    $raceFolder = faceai_request_value('raceFolder');
    $raceStorageRelativeDir = faceai_request_value('raceStorageRelativeDir');
    $lang = faceai_request_value('lang', 'it');
    $returnUrl = faceai_request_value('returnUrl');

    if (empty($config['feature_enabled'])) {
        faceai_redirect_with_error($returnUrl, 'La ricerca Face ID non e ancora disponibile.');
    }

    if ($raceId === '' || $returnUrl === '') {
        faceai_render_message_page(
            'FaceAI handoff non disponibile',
            'Mancano i parametri minimi richiesti per lanciare FaceAI.',
            array(
                'Parametri richiesti: raceId, returnUrl.',
                'Il pulsante Face ID deve passare anche raceSlug e lang quando disponibili.'
            ),
            400
        );
    }

    $identity = faceai_resolve_identity($config);
    if ($identity === null) {
        faceai_redirect_with_error($returnUrl, 'Il servizio Face ID non e al momento disponibile. Riprova piu tardi.');
    }

    if (($identity['membershipStatus'] ?? 'inactive') !== 'active') {
        faceai_redirect_with_error($returnUrl, 'Il tuo account non e abilitato all uso di Face ID.');
    }

    $racePayload = array(
        'id' => $raceId,
        'slug' => $raceSlug !== '' ? $raceSlug : $raceId,
        'name' => $raceName !== '' ? $raceName : $raceId
    );

    if ($raceYear !== '' || $raceMonthFolder !== '' || $raceFolder !== '' || $raceStorageRelativeDir !== '') {
        $racePayload['storage'] = array(
            'year' => $raceYear,
            'monthFolder' => $raceMonthFolder,
            'raceFolder' => strtoupper(trim($raceFolder)),
            'relativeDir' => $raceStorageRelativeDir
        );
    }

    $payload = array(
        'type' => 'handoff',
        'user' => array(
            'id' => $identity['id'],
            'displayName' => $identity['displayName'],
            'email' => $identity['email'],
            'membershipStatus' => $identity['membershipStatus']
        ),
        'race' => $racePayload,
        'lang' => $lang,
        'returnUrl' => $returnUrl,
        'expiresAt' => ((int) round(microtime(true) * 1000)) + (5 * 60 * 1000)
    );

    $token = faceai_sign_payload($payload, $config['shared_secret']);
    $targetUrl = faceai_build_url($config['frontend_url'] . '/auth/callback', array('token' => $token));

    header('Cache-Control: no-store, no-cache, must-revalidate, max-age=0');
    header('Pragma: no-cache');
    header('Location: ' . $targetUrl, true, 302);
    exit;
} catch (Throwable $error) {
    faceai_redirect_with_error(isset($returnUrl) ? $returnUrl : '', 'Il servizio Face ID non e al momento disponibile. Riprova piu tardi.');
}