<?php

declare(strict_types=1);

namespace Mummert\SurveyBundle\Controller\FrontendModule;

use Contao\CoreBundle\Controller\FrontendModule\AbstractFrontendModuleController;
use Contao\CoreBundle\DependencyInjection\Attribute\AsFrontendModule;
use Contao\CoreBundle\Twig\FragmentTemplate;
use Contao\ModuleModel;
use Mummert\SurveyBundle\Form\Model\SurveyAnswerData;
use Mummert\SurveyBundle\Form\SurveyQuestionAnswerType;
use Mummert\SurveyBundle\Repository\SurveyRepository;
use Mummert\SurveyBundle\Service\SurveyFlowService;
use Mummert\SurveyBundle\Service\SurveySubmissionService;
use Symfony\Component\HttpFoundation\RedirectResponse;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\HttpFoundation\Response;

#[AsFrontendModule(type: 'show_survey', category: 'survey', template: 'frontend/show_survey')]
final class ShowSurveyController extends AbstractFrontendModuleController
{
    public function __construct(
        private readonly SurveyRepository $surveyRepository,
        private readonly SurveyFlowService $surveyFlowService,
        private readonly SurveySubmissionService $surveySubmissionService,
    ) {
    }

    protected function getResponse(FragmentTemplate $template, ModuleModel $model, Request $request): Response
    {
        $publicAlias = $this->resolvePublicAlias($request);

        if ('' === $publicAlias) {
            $template->set('errorMessage', 'Es wurde kein oeffentlicher Link auf der Anzeigeseite gefunden.');
            $template->set('question', null);
            $template->set('surveyForm', null);
            $template->set('isComplete', false);
            $template->set('answers', []);
            $template->set('survey', null);
            $template->set('progress', ['current' => 0, 'total' => 0, 'percentage' => 0]);

            return $template->getResponse();
        }

        $survey = $this->surveyRepository->findByPublicAlias($publicAlias, true);

        if (null === $survey) {
            $template->set('errorMessage', 'Die Umfrage wurde nicht gefunden oder ist nicht veroeffentlicht.');
            $template->set('question', null);
            $template->set('surveyForm', null);
            $template->set('isComplete', false);
            $template->set('answers', []);
            $template->set('survey', null);
            $template->set('progress', ['current' => 0, 'total' => 0, 'percentage' => 0]);

            return $template->getResponse();
        }

        if ($htmlHeadBag = $this->getHtmlHeadBag()) {
            $htmlHeadBag->setTitle((string) $survey->title);
        }

        $submission = $this->surveySubmissionService->resolveActiveSubmission($survey, $request->getSession(), null);
        $question = $this->surveyFlowService->resolveCurrentQuestion($survey, $submission);

        if (null === $question && '1' !== (string) $submission->isFinished) {
            $template->set('errorMessage', 'Diese Umfrage ist noch nicht vollstaendig eingerichtet. Es fehlt eine gueltige erste Frage oder eine verknuepfte Folgefrage ist nicht mehr verfuegbar.');
            $template->set('question', null);
            $template->set('surveyForm', null);
            $template->set('isComplete', false);
            $template->set('answers', []);
            $template->set('survey', $survey);
            $template->set('progress', ['current' => 0, 'total' => 0, 'percentage' => 0]);

            return $template->getResponse();
        }

        if (null === $question) {
            $template->set('errorMessage', null);
            $template->set('survey', $survey);
            $template->set('progress', $this->surveyFlowService->getProgress($survey, null));
            $template->set('question', null);
            $template->set('surveyForm', null);
            $template->set('isComplete', true);
            $template->set('answers', $this->surveySubmissionService->getAnswersForSubmission($submission));

            return $template->getResponse();
        }

        $answerData = new SurveyAnswerData();
        $form = $this->createForm(SurveyQuestionAnswerType::class, $answerData, ['question' => $question]);
        $form->handleRequest($request);

        if ($form->isSubmitted() && $form->isValid()) {
            $normalizedAnswer = $this->surveySubmissionService->storeAnswer($survey, $submission, $question, $answerData->answer);
            $nextQuestion = $this->surveyFlowService->determineNextQuestion($survey, $question, $normalizedAnswer);
            $this->surveySubmissionService->advance($submission, $nextQuestion);

            return new RedirectResponse($request->getUri());
        }

        $template->set('errorMessage', null);
        $template->set('survey', $survey);
        $template->set('progress', $this->surveyFlowService->getProgress($survey, $question));
        $template->set('question', $question);
        $template->set('surveyForm', $form->createView());
        $template->set('isComplete', false);
        $template->set('answers', []);

        return $template->getResponse();
    }

    private function resolvePublicAlias(Request $request): string
    {
        $candidate = $request->attributes->get('auto_item');

        if (\is_string($candidate) && '' !== trim($candidate)) {
            return trim($candidate);
        }

        $queryValue = (string) $request->query->get('auto_item', '');

        return trim($queryValue);
    }
}