<?php

require_once __DIR__ . '/../vendor/autoload.php';

use Jakach\Logging\Storage\Database;

session_set_cookie_params([
    'lifetime' => 86400 * 7,
    'path' => '/',
    'httponly' => true,
    'samesite' => 'Lax',
]);
session_start();

$authToken = $_GET['auth'] ?? '';

if (!$authToken) {
    header('Content-Type: application/json');
    http_response_code(400);
    echo json_encode(['error' => 'Missing auth token']);
    exit;
}

$checkUrl = 'https://auth.jakach.ch/api/auth/check_auth_key.php?auth_token=' . urlencode($authToken);

$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $checkUrl);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_TIMEOUT, 10);
$response = curl_exec($ch);
$httpCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
curl_close($ch);

if ($httpCode !== 200 || !$response) {
    header('Content-Type: application/json');
    http_response_code(502);
    echo json_encode(['error' => 'Auth server unreachable']);
    exit;
}

$data = json_decode($response, true);

if (!isset($data['status']) || $data['status'] !== 'success') {
    header('Content-Type: application/json');
    http_response_code(401);
    echo json_encode(['error' => 'Authentication failed', 'msg' => $data['msg'] ?? 'unknown']);
    exit;
}

$_SESSION['loggedin'] = true;
$_SESSION['username'] = $data['username'] ?? 'unknown';
$_SESSION['id'] = $data['id'] ?? '';
$_SESSION['email'] = $data['email'] ?? '';
$_SESSION['telegram_id'] = $data['telegram_id'] ?? '';
$_SESSION['user_token'] = $data['user_token'] ?? '';

if (!headers_sent()) {
    $db = new Database();
    $repo = new \Jakach\Logging\Storage\Repository($db);
    $allowedTokens = $repo->getAllowedUserTokens();

    if (!empty($allowedTokens) && !in_array($_SESSION['user_token'], $allowedTokens, true)) {
        $_SESSION = [];
        session_destroy();
        header('Content-Type: application/json');
        http_response_code(403);
        echo json_encode(['error' => 'Your account is not authorized to access this system']);
        exit;
    }
}

$redirect = $_GET['redirect'] ?? '/';
header('Location: ' . $redirect);
exit;