<?php
$url = getenv('API_URL') ?: 'http://127.0.0.1:8080/orders/42';
$maxAttempts = 3;
$baseDelaySeconds = 0.2;
$retryStatuses = [408, 429, 500, 502, 503, 504];
$retryCurlErrors = [
    CURLE_COULDNT_RESOLVE_HOST,
    CURLE_COULDNT_CONNECT,
    CURLE_OPERATION_TIMEDOUT,
    CURLE_RECV_ERROR,
    CURLE_SEND_ERROR,
    CURLE_GOT_NOTHING,
];

$lastError = null;

for ($attempt = 1; $attempt <= $maxAttempts; $attempt++) {
    $curl = curl_init($url);
    if ($curl === false) {
        fwrite(STDERR, "Could not initialize cURL." . PHP_EOL);
        exit(1);
    }

    curl_setopt_array($curl, [
        CURLOPT_RETURNTRANSFER => true,
        CURLOPT_HTTPHEADER => [
            'Accept: application/json',
        ],
        CURLOPT_CONNECTTIMEOUT => 3,
        CURLOPT_TIMEOUT => 10,
    ]);

    $body = curl_exec($curl);
    $errno = curl_errno($curl);
    $error = curl_error($curl);
    $status = curl_getinfo($curl, CURLINFO_HTTP_CODE);
    curl_close($curl);

    if ($body === false) {
        $lastError = "cURL error {$errno}: {$error}";
        echo "Attempt {$attempt}: {$lastError}" . PHP_EOL;
        $shouldRetry = in_array($errno, $retryCurlErrors, true);
    } else {
        echo "Attempt {$attempt}: HTTP {$status}" . PHP_EOL;

        if ($status >= 200 && $status < 300) {
            echo "Response body: " . trim($body) . PHP_EOL;
            exit(0);
        }

        $lastError = "HTTP {$status}: " . trim($body);
        $shouldRetry = in_array($status, $retryStatuses, true);
    }

    if (!$shouldRetry || $attempt === $maxAttempts) {
        break;
    }

    $delay = $baseDelaySeconds * (2 ** ($attempt - 1));
    echo "Retrying after {$delay} seconds." . PHP_EOL;
    usleep((int) ($delay * 1000000));
}

echo "Request failed after {$maxAttempts} attempts." . PHP_EOL;
echo "Last error: {$lastError}" . PHP_EOL;
exit(1);