<?php

namespace Komponent\Component\Testquestions\Administrator\Model;

defined('_JEXEC') or die;

use Joomla\CMS\Factory;
use Joomla\CMS\MVC\Model\BaseDatabaseModel;

class ResultModel extends BaseDatabaseModel
{
    public function getItem($pk = null)
    {
        $id = (int) ($pk ?: Factory::getApplication()->getInput()->getInt('id'));
        $db = Factory::getContainer()->get('DatabaseDriver');
        $item = $db->setQuery(
            $db->getQuery(true)
                ->select(['r.*', 's.title AS set_title', 'sub.title AS subject_title'])
                ->from($db->quoteName('#__testquestions_results', 'r'))
                ->leftJoin($db->quoteName('#__testquestions_sets', 's') . ' ON s.id = r.set_id')
                ->leftJoin($db->quoteName('#__testquestions_subjects', 'sub') . ' ON sub.id = s.subject_id')
                ->where('r.id = ' . $id)
        )->loadObject();

        if (!$item) {
            return null;
        }

        $item->answers = json_decode((string) $item->answers, true) ?: [];
        $ids = array_map('intval', array_keys($item->answers));
        $item->questions = [];

        if ($ids) {
            $item->questions = $db->setQuery(
                $db->getQuery(true)
                    ->select(['id', 'question_type', 'question', 'answer_a', 'answer_b', 'answer_c', 'answer_d', 'answer_open', 'correct_answer', 'points'])
                    ->from($db->quoteName('#__testquestions_questions'))
                    ->where('id IN (' . implode(',', $ids) . ')')
            )->loadObjectList('id');
        }

        return $item;
    }

    public function saveAssessment(int $id, array $awardedPoints, array $comments): bool
    {
        $item = $this->getItem($id);

        if (!$item) {
            return false;
        }

        foreach ($item->answers as $questionId => &$answer) {
            $key = (string) $questionId;
            $maxPoints = (int) ($item->questions[(int) $questionId]->points ?? 0);
            $answer['awarded_points'] = min($maxPoints, max(0, (int) ($awardedPoints[$key] ?? 0)));
            $answer['comment'] = trim((string) ($comments[$key] ?? ''));
        }
        unset($answer);

        $correctionPoints = 0;
        foreach ($item->answers as $answer) {
            $correctionPoints += (int) ($answer['awarded_points'] ?? 0);
        }

        $db = Factory::getContainer()->get('DatabaseDriver');
        $row = (object) [
            'id' => $id,
            'answers' => json_encode($item->answers, JSON_UNESCAPED_UNICODE),
            'points_after' => (int) $item->points_before + $correctionPoints,
        ];

        return (bool) $db->updateObject('#__testquestions_results', $row, 'id');
    }
}