<?php

namespace Komponent\Component\Testquestions\Site\View\Set;

defined('_JEXEC') or die;

use Joomla\CMS\Factory;
use Joomla\CMS\MVC\View\HtmlView as BaseHtmlView;

class HtmlView extends BaseHtmlView
{
    protected $set;
    protected $items;
    protected $results;

    public function display($tpl = null)
    {
        $this->set = $this->get('Set');
        $this->items = $this->get('Items');
        $this->results = $this->buildResults($this->items);

        return parent::display($tpl);
    }

    protected function buildResults(array $items)
    {
        $input = Factory::getApplication()->getInput();

        if ($input->getCmd('task') !== 'check' || $input->getMethod() !== 'POST') {
            return null;
        }

        $answers = (array) $input->post->get('answers', [], 'array');
        $results = [];
        $correct = 0;

        foreach ($items as $item) {
            $selected = isset($answers[$item->id]) ? trim((string) $answers[$item->id]) : '';
            $isCorrect = false;

            if ($item->question_type === 'open') {
                $patterns = preg_split('/\s*\|\s*/', (string) $item->answer_open, -1, PREG_SPLIT_NO_EMPTY);
                foreach ($patterns as $pattern) {
                    if (mb_strtolower(trim($pattern), 'UTF-8') === mb_strtolower($selected, 'UTF-8')) {
                        $isCorrect = true;
                        break;
                    }
                }
            } else {
                $isCorrect = (string) $item->correct_answer === $selected;
            }

            if ($isCorrect) {
                $correct++;
            }

            $results[$item->id] = ['selected' => $selected, 'correct' => $isCorrect];
        }

        return [
            'items' => $results,
            'correct' => $correct,
            'total' => count($items),
            'percentage' => count($items) ? round(($correct / count($items)) * 100, 2) : 0,
        ];
    }
}