<?php

include 'includes/config.php';
include 'includes/common.php';

$quizID = (int) $_GET['id'];
$quizes = new Quizes();
$quizInfo = $quizes->getQuiz('quiz_id="' . $quizID . '"');

if ($quizInfo) {
    $questions = new Questions();
    $questionsList = $questions->getQuestions('quiz_id="' . $quizID . '"');

    if (isset($_POST['submit'])) {
        $answers = new Answers();
        $totalQuestions = $questionsList['count']['questions'];
        $correctAnswers = 0;

        foreach ($_POST as $key => $value) {
            $answerInfo = $answers->getAnswer('question_id="' . $key . '" AND answer="' . $value . '"');
            if ($answerInfo['is_true']) {
                $correctAnswers++;
            }
        }

        $correctAnswersPercent = round(($correctAnswers / $totalQuestions) * 100);

        $mark = ($correctAnswers / $totalQuestions) * 4 + 2;
    }
    include TEMPLATE_DIR . DIRECTORY_SEPARATOR . 'view_quiz.phtml';
} else {
    include TEMPLATE_DIR . DIRECTORY_SEPARATOR . 'error.phtml';
}