<?php

declare(strict_types=1);

use Contractless\Api\Tools\FalconSigner;
use Contractless\Api\Tools\TestWalletLoader;
use Contractless\Api\ApplicationFactory;
use Contractless\Rpc\Client;
use Contractless\Rpc\Crypto\NativeCrypto;
use Contractless\Rpc\Protocol\HandshakeProof;
use Contractless\Rpc\Transport\StreamTransport;

if (PHP_SAPI !== 'cli') {
    http_response_code(404);
    exit;
}

$projectRoot = dirname(__DIR__);
require $projectRoot . '/vendor/autoload.php';
require __DIR__ . '/WalletSupport.php';

$baseUrl = rtrim((string) ($argv[1] ?? ''), '/');
$walletPath = (string) ($argv[2] ?? '');
$route = (string) ($argv[3] ?? '/api/v1/height');

if (
    $baseUrl === ''
    || filter_var($baseUrl, FILTER_VALIDATE_URL) === false
    || !str_starts_with($baseUrl, 'https://')
    || $walletPath === ''
) {
    fwrite(
        STDERR,
        "Usage: php tools/test_api.php https://api.example.com /path/to/wallet [/api/v1/route]\n",
    );
    exit(1);
}
if (!str_starts_with($route, '/api/v1')) {
    fwrite(STDERR, "The test route must begin with /api/v1.\n");
    exit(1);
}

function hiddenPrompt(string $prompt): string
{
    fwrite(STDOUT, $prompt);
    $isWindows = PHP_OS_FAMILY === 'Windows';
    if (!$isWindows) {
        shell_exec('stty -echo');
    }
    try {
        $value = fgets(STDIN);
    } finally {
        if (!$isWindows) {
            shell_exec('stty echo');
        }
        fwrite(STDOUT, PHP_EOL);
    }
    return trim((string) $value);
}

try {
    $walletKey = hiddenPrompt('What is your wallet decryption key? ');
    if ($walletKey === '') {
        throw new RuntimeException('Wallet decryption key cannot be empty.');
    }

    $crypto = new NativeCrypto();
    $wallet = TestWalletLoader::load($walletPath, $walletKey, $crypto);
    $signer = new FalconSigner($wallet['public_key'], $wallet['private_key']);
    $signature = $signer->sign($crypto->skein256('aced'));

    $context = stream_context_create([
        'http' => [
            'method' => 'GET',
            'header' => implode("\r\n", [
                'Accept: application/json',
                'X-Contractless-Address: ' . $wallet['address'],
                'X-Contractless-Public-Key: ' . bin2hex($wallet['public_key']),
                'X-Contractless-Signature: ' . bin2hex($signature),
            ]),
            'ignore_errors' => true,
            'timeout' => 20,
        ],
    ]);
    $body = file_get_contents($baseUrl . $route, false, $context);
    if ($body === false) {
        throw new RuntimeException('The API request could not be completed.');
    }

    $responseHeaders = $http_response_header ?? [];
    $statusLine = (string) ($responseHeaders[0] ?? '');
    if (preg_match('/\s(\d{3})\s/', $statusLine, $match) !== 1) {
        throw new RuntimeException('The API returned an invalid HTTP response.');
    }
    $status = (int) $match[1];
    echo "HTTP $status\n";
    try {
        $decoded = json_decode($body, true, flags: JSON_THROW_ON_ERROR);
        echo json_encode(
            $decoded,
            JSON_PRETTY_PRINT | JSON_UNESCAPED_SLASHES | JSON_THROW_ON_ERROR,
        ) . PHP_EOL;
    } catch (JsonException) {
        echo $body . PHP_EOL;
    }

    if ($status === 503) {
        fwrite(
            STDERR,
            "The API returned 503. Testing each configured RPC endpoint directly:\n",
        );
        $config = ApplicationFactory::configuration($projectRoot);
        $proof = new HandshakeProof($wallet['public_key'], $signature);
        foreach ($config->rpcNodes as $name => $node) {
            try {
                $client = new Client(
                    new StreamTransport(
                        host: $node['host'],
                        port: $node['port'],
                        timeout: $config->rpcTimeout,
                    ),
                    $crypto,
                    $proof,
                );
                $reply = $client->blockHeight();
                if (strlen($reply) !== 4) {
                    throw new RuntimeException(
                        "Block-height reply contained " . strlen($reply) . ' bytes.',
                    );
                }
                $height = unpack('Vheight', $reply);
                fwrite(
                    STDERR,
                    sprintf(
                        "[%s] %s:%d succeeded at height %u\n",
                        $name,
                        $node['host'],
                        $node['port'],
                        (int) ($height['height'] ?? 0),
                    ),
                );
            } catch (Throwable $endpointError) {
                fwrite(
                    STDERR,
                    sprintf(
                        "[%s] %s:%d failed: %s: %s\n",
                        $name,
                        $node['host'],
                        $node['port'],
                        $endpointError::class,
                        $endpointError->getMessage(),
                    ),
                );
            }
        }
    }

    exit($status >= 200 && $status < 300 ? 0 : 1);
} catch (Throwable $error) {
    fwrite(STDERR, 'API test failed: ' . $error->getMessage() . PHP_EOL);
    exit(1);
}