<?php
/**
 * Created by PhpStorm.
 * User: leanderschmedemann
 * Date: 03/04/2017
 * Time: 14:00
 */

require_once('includes.inc.php');
$data = '';
$error = 0;
$uid = isset($_GET['uid']) ? $_GET['uid'] : '';
$time = isset($_GET['time']) ? $_GET['time'] : '';
$time = (($time === '0') || ($time && gettype(+$time) == 'integer')) ? +$_GET['time'] : 0;
$db = new Database();
$chosen_answer = isset($_GET['answer']) ? $_GET['answer'] : '';
$chosen_answer = (($chosen_answer === '0') || ($chosen_answer && gettype(+$chosen_answer) == 'integer')) ? +$_GET['answer'] : -1;

function calculate_points($time) {
    $points = $time < 2000 ? 100 : 141.1421 - 0.02842916 * $time + 0.000004132312 * pow($time, 2)
        - 3.432331e-10 * pow($time, 3) + 1.391508e-14 * pow($time, 4) - 2.166078e-19 * pow($time, 5);
    $points = $points < 10 ? 100 : intval($points * 10);
    return $points;
}

$correct_answer = $db->query('SELECT "current_right_answer" FROM "Games" WHERE "ID" = $1', array($uid))
    ['data'][0]['current_right_answer'];
$correct = $correct_answer == $chosen_answer ? true : false;
$score = $correct_answer == $chosen_answer ? calculate_points($time) : 0;
if($uid == '') {
    $error = 13101;
} else if($time == 0) {
    $error = 13102;
} else if($chosen_answer == -1) {
    $error = 13103;
} else if($db->query('SELECT EXISTS (SELECT 1 FROM "Games" WHERE "ID" = $1)', array($uid))
    ['data'][0]['exists'] == 'f') {
    $error = 13104;
} else {
    $old_points = $db->query('SELECT "current_score" FROM "Games" WHERE "ID" = $1', array($uid))
        ['data'][0]['current_score'];
    $new_points = $old_points + $score;
    $db->query('UPDATE "Games" SET "current_score" = $1 WHERE "ID" = $2', array($new_points, $uid));
    $results = array('correct' => $correct, 'correctPos' => $correct_answer, 'score' => $score);
    $old_time = $db->query('SELECT "total_time" FROM "Games" WHERE "ID" = $1', array($uid))
        ['data'][0]['total_time'];
    $new_time = $old_time + $time;
    $db->query('UPDATE "Games" SET "total_time" = $1 WHERE "ID" = $2', array($new_time, $uid));
    if($db->query('SELECT EXISTS (SELECT 1 FROM "GamesQuestions" WHERE "Games_ID" = $1)',array($uid))
        ['data'][0]['exists'] == 't') {
        $next_question = Question::get_next_question($db, $uid);
        $data = array('results' => $results, 'next' => $next_question);
    } else {
        $end = array('score' => $new_points, 'time' => $new_time);
        $data = array('results' => $results, 'end' => $end);
        $db->query('DELETE FROM "Games" WHERE "ID" = $1', array($uid));
    }
}

$response = Database::create_response($data, $error);
print_r($response);

?>