<?php
require_once __DIR__ . '/db/config.php';

function generate_code($length = 6) {
    $chars = '0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ';
    $code = '';
    for ($i = 0; $i < $length; $i++) {
        $code .= $chars[rand(0, strlen($chars) - 1)];
    }
    return $code;
}

$pdo = db();
$session_code = '';
$is_unique = false;

// Generate a unique code
while (!$is_unique) {
    $session_code = generate_code();
    $stmt = $pdo->prepare("SELECT id FROM sessions WHERE session_code = ?");
    $stmt->execute([$session_code]);
    if ($stmt->rowCount() === 0) {
        $is_unique = true;
    }
}

// Insert the new session
$stmt = $pdo->prepare("INSERT INTO sessions (session_code) VALUES (?)");
$stmt->execute([$session_code]);

$session_id = $pdo->lastInsertId();

// Redirect to the session page
header("Location: session.php?id=" . $session_id);
exit();