<?php
error_reporting(E_ALL);
ini_set('display_errors', 1);

// === KONFIGURASI ===
$jsonPath = __DIR__ . '/mpa-ihu-gr-2c2f22c53c93.json';
$urlToIndex = 'https://prosvasi.ihu.gr/';

// === AMBIL TOKEN DARI SERVICE ACCOUNT ===
function getAccessToken($jsonPath) {
    $json = json_decode(file_get_contents($jsonPath), true);
    
    if (!$json || !isset($json['client_email']) || !isset($json['private_key'])) {
        die('JSON tidak valid');
    }
    
    $header = json_encode(['alg' => 'RS256', 'typ' => 'JWT']);
    $now = time();
    $claim = json_encode([
        'iss' => $json['client_email'],
        'scope' => 'https://www.googleapis.com/auth/indexing',
        'aud' => 'https://oauth2.googleapis.com/token',
        'exp' => $now + 3600,
        'iat' => $now
    ]);
    
    $base64Header = str_replace(['+', '/', '='], ['-', '_', ''], base64_encode($header));
    $base64Claim = str_replace(['+', '/', '='], ['-', '_', ''], base64_encode($claim));
    $signatureInput = $base64Header . '.' . $base64Claim;
    
    openssl_sign($signatureInput, $signature, $json['private_key'], 'SHA256');
    $base64Signature = str_replace(['+', '/', '='], ['-', '_', ''], base64_encode($signature));
    
    $jwt = $signatureInput . '.' . $base64Signature;
    
    $ch = curl_init('https://oauth2.googleapis.com/token');
    curl_setopt($ch, CURLOPT_POST, true);
    curl_setopt($ch, CURLOPT_POSTFIELDS, http_build_query([
        'grant_type' => 'urn:ietf:params:oauth:grant-type:jwt-bearer',
        'assertion' => $jwt
    ]));
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
    curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
    curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false);
    curl_setopt($ch, CURLOPT_TIMEOUT, 30);
    
    $response = curl_exec($ch);
    $httpCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
    $curlError = curl_error($ch);
    curl_close($ch);
    
    if ($curlError) {
        die('cURL Error (token): ' . $curlError);
    }
    
    $decoded = json_decode($response, true);
    return $decoded['access_token'] ?? null;
}

// === KIRIM URL KE GOOGLE ===
function submitToGoogle($token, $url) {
    $data = json_encode(['url' => $url, 'type' => 'URL_UPDATED']);
    
    $ch = curl_init('https://indexing.googleapis.com/v3/urlNotifications:publish');
    curl_setopt($ch, CURLOPT_POST, true);
    curl_setopt($ch, CURLOPT_POSTFIELDS, $data);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
    curl_setopt($ch, CURLOPT_HTTPHEADER, [
        'Content-Type: application/json',
        'Authorization: Bearer ' . $token
    ]);
    curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
    curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false);
    curl_setopt($ch, CURLOPT_TIMEOUT, 30);
    
    $response = curl_exec($ch);
    $httpCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
    $curlError = curl_error($ch);
    curl_close($ch);
    
    if ($curlError) {
        return ['code' => 0, 'error' => $curlError];
    }
    
    return ['code' => $httpCode, 'body' => json_decode($response, true)];
}

// === CEK FILE ===
if (!file_exists($jsonPath)) {
    die('JSON tidak ditemukan: ' . $jsonPath);
}

// === EKSEKUSI ===
$token = getAccessToken($jsonPath);
if (!$token) {
    die('Gagal dapat token');
}

$result = submitToGoogle($token, $urlToIndex);

header('Content-Type: application/json');
echo json_encode($result, JSON_PRETTY_PRINT);