<?php

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

defined('_JEXEC') or die;

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

class HtmlView extends BaseHtmlView
{
    protected $items;
    protected $symbol;
    protected $symbols;
    protected $results;

    public function formatSheetLabel($sheet)
    {
        $qualification = (string) ($sheet->category_title ?: '');

        if (preg_match('/^([A-Z]+)(\d+)$/i', $qualification, $matches)) {
            $qualification = strtoupper($matches[1]) . '.' . $matches[2];
        }

        $months = [
            1 => 'Styczeń', 2 => 'Luty', 3 => 'Marzec', 4 => 'Kwiecień',
            5 => 'Maj', 6 => 'Czerwiec', 7 => 'Lipiec', 8 => 'Sierpień',
            9 => 'Wrzesień', 10 => 'Październik', 11 => 'Listopad', 12 => 'Grudzień',
        ];
        $period = '';

        if (preg_match('/-(\d{2})\.(\d{2})$/', (string) $sheet->test_symbol, $matches)) {
            $month = (int) $matches[2];
            $year = (int) $sheet->exam_year ?: 2000 + (int) $matches[1];
            $period = ($months[$month] ?? '') . ' ' . $year;
        } elseif ($sheet->exam_year) {
            $period = (string) $sheet->exam_year;
        }

        return trim('Kwalifikacja ' . $qualification . ($period ? ' - ' . $period : '') . ' (' . $sheet->test_symbol . ')');
    }

    public function display($tpl = null)
    {
        $this->getDocument()->getWebAssetManager()->registerAndUseStyle(
            'com_testquestions.exam',
            'media/com_testquestions/egzamin.css'
        );
        $this->items = $this->get('Items');
        $this->symbol = $this->get('State')->get('filter.test_symbol');
        $this->symbols = $this->get('TestSymbols');
        $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,
        ];
    }
}