<?php
declare(strict_types=1);

require_once dirname(dirname(__DIR__)) . '/bootstrap.php';

if (!TaskCertRequest::isPost()) {
    TaskCertResponse::error('Methode nicht erlaubt', 405);
}

$auth = TaskCertAuthContext::fromGlobals();
if (!$auth->isLoggedIn()) {
    TaskCertResponse::error('Nicht eingeloggt', 401);
}

TaskCertCsrf::assertValidFromRequest(true);

$assignmentId = TaskCertRequest::postInt('assignment_id', 0);
$methodId = TaskCertRequest::postInt('method_id', 0);
$answersRaw = TaskCertRequest::postArray('answers');

if ($assignmentId <= 0 || $methodId <= 0) {
    TaskCertResponse::error('Ungültige assignment_id oder method_id', 400);
}

$answers = [];
foreach ($answersRaw as $questionId => $questionAnswers) {
    $questionIdInt = (int) $questionId;
    if ($questionIdInt <= 0) {
        continue;
    }

    if (!is_array($questionAnswers)) {
        $questionAnswers = [$questionAnswers];
    }

    $answers[$questionIdInt] = array_values(array_unique(array_map('intval', $questionAnswers)));
}

try {
    $services = task_cert_services();
    $submissionId = $services['completionService']->submitQuiz($assignmentId, $methodId, $answers);

    $redirectTo = TaskCertRequest::postString('redirect_to', '');
    if ($redirectTo !== '') {
        TaskCertResponse::redirect($redirectTo);
    }

    TaskCertResponse::json([
        'success' => true,
        'submission_id' => $submissionId,
    ]);
} catch (Throwable $throwable) {
    TaskCertResponse::json([
        'success' => false,
        'error' => $throwable->getMessage(),
    ], 400);
}