<?php
declare(strict_types=1);

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

function task_cert_user_task_detail_action(): array
{
    $auth = TaskCertAuthContext::fromGlobals();
    if (!$auth->isLoggedIn()) {
        return [
            'error' => 'Nicht eingeloggt.',
        ];
    }

    $assignmentId = TaskCertRequest::queryInt('assignment_id', 0);
    if ($assignmentId <= 0) {
        return [
            'error' => 'Ungültige Assignment-ID.',
        ];
    }

    $services = task_cert_services();
    $assignment = $services['assignmentRepo']->findById($assignmentId);

    if ($assignment === null) {
        return [
            'error' => 'Assignment nicht gefunden.',
        ];
    }

    if ((int) $assignment['main_contact_id'] !== $auth->contactId()) {
        return [
            'error' => 'Keine Berechtigung für dieses Assignment.',
        ];
    }

    $task = $services['definitionRepo']->findById((int) $assignment['task_id']);
    if ($task === null) {
        return [
            'error' => 'Aufgabe nicht gefunden.',
        ];
    }

    $methods = $services['ruleRepo']->getMethodsByTask((int) $assignment['task_id']);
    $methods = array_values(array_filter($methods, static function (array $method): bool {
        return (int) ($method['active'] ?? 1) === 1;
    }));
    $submissions = $services['submissionRepo']->listByAssignment($assignmentId);

    $postIds = [];
    foreach ($methods as $method) {
        if ((string) ($method['method_type'] ?? '') !== 'knowledge_read') {
            continue;
        }

        foreach ((array) ($method['knowledge_posts'] ?? []) as $post) {
            $postId = (int) ($post['knowledge_post_id'] ?? 0);
            if ($postId > 0) {
                $postIds[] = $postId;
            }
        }
    }

    $knowledgePostTitleMap = [];
    $lookupService = $services['lookupService'] ?? null;
    if ($lookupService instanceof TaskLookupService) {
        $languageId = (int) ($GLOBALS['language']['id'] ?? 1);
        $knowledgePostTitleMap = $lookupService->getKnowledgePostTitleMapByIds($languageId, $postIds);
    }

    foreach ($methods as &$method) {
        if ((string) ($method['method_type'] ?? '') !== 'knowledge_read') {
            continue;
        }

        foreach ((array) ($method['knowledge_posts'] ?? []) as &$post) {
            $postId = (int) ($post['knowledge_post_id'] ?? 0);
            $post['title'] = $knowledgePostTitleMap[$postId] ?? ('Beitrag #' . $postId);
        }
        unset($post);
    }
    unset($method);

    $responsibles = $services['ruleRepo']->getResponsiblesWithContactData((int) $assignment['task_id']);

    $neededPrefillColumns = [];
    foreach ($methods as $m) {
        foreach ((array) ($m['form_fields'] ?? []) as $ff) {
            $col = trim((string) ($ff['prefill_column'] ?? ''));
            if ($col !== '' && ContactPrefillColumns::isValid($col)) {
                $neededPrefillColumns[$col] = true;
            }
        }
    }
    $contactData = [];
    if ($neededPrefillColumns !== []) {
        try {
            $contactRow = TaskCertDb::fetchOne(
                'SELECT * FROM main_contact WHERE id = ? LIMIT 1',
                'i',
                [$auth->contactId()]
            );
            if (is_array($contactRow)) {
                $contactData = $contactRow;
            }
        } catch (Throwable $e) {
            $contactData = [];
        }
    }

    return [
        'error' => null,
        'assignment' => $assignment,
        'task' => $task,
        'methods' => $methods,
        'submissions' => $submissions,
        'task_certificates_history' => $services['certificateService']->listUserTaskCertificates(
            $auth->contactId(),
            (int) $assignment['task_id']
        ),
        'responsibles' => $responsibles,
        'contact_data' => $contactData,
        'csrf_token' => TaskCertCsrf::token(),
    ];
}