<?php
define("PHP_CLI_SERVER_HOSTNAME", "localhost");
define("PHP_CLI_SERVER_PORT", 8964);
define("PHP_CLI_SERVER_ADDRESS", PHP_CLI_SERVER_HOSTNAME.":".PHP_CLI_SERVER_PORT);

function php_cli_server_start(
    ?string $code = 'echo "Hello world";',
    ?string $router = 'index.php',
    array $cmd_args = []
) {
    $php_executable = getenv('TEST_PHP_EXECUTABLE');
    $doc_root = __DIR__;
    $error = null;

    if ($code) {
        file_put_contents($doc_root . '/' . ($router ?: 'index.php'), '<?php ' . $code . ' ?>');
    }

    $cmd = [$php_executable, '-t', $doc_root, '-n', ...$cmd_args, '-S', PHP_CLI_SERVER_ADDRESS];
    if (!is_null($router)) {
        $cmd[] = $router;
    }

    $descriptorspec = array(
        0 => STDIN,
        1 => STDOUT,
        2 => array("null"),
    );
    $handle = proc_open($cmd, $descriptorspec, $pipes, $doc_root, null, array("suppress_errors" => true));

    // note: here we check the process is running
    for ($i=0; $i < 120; $i++) {
        $status = proc_get_status($handle);

        if (!$status || !$status['running']) {
            if ($status &&
               ($status['running'] == false && $status['exitcode'] != 0)) {
                $error =
                    "Server could not be started\n";
                break;
            }

            usleep(50000); // 50ms per try
            continue;
        }

        if ($status['signaled']) {
            $error =
                "Server was terminated with {$status['termsig']}\n";
            break;
        }

        if ($status['stopped']) {
            $error =
                "Server was stopped with {$status['stopsig']}\n";
            break;
        }

        // note: here we check the server is listening, even when the server prints
        //          listening on %s:%d
        //       it may not be ready to accept connections
        $start = time();

        for ($try = 0; $try < 120; $try++) {
            $error = @fsockopen(
                        PHP_CLI_SERVER_HOSTNAME, PHP_CLI_SERVER_PORT) ?
                            null :
                            sprintf(
                                "Server is not accepting connections after %d seconds\n",
                                time() - $start);

            if (!$error) {
                break 2;
            }

            usleep(50000);
        }

        break;
    }

php_cli_server_start_error:
    if ($error) {
        echo $error;
        proc_terminate($handle);
        exit(1);
    }

    register_shutdown_function(
        function($handle) use($router) {
            proc_terminate($handle);
            @unlink(__DIR__ . "/{$router}");
        },
        $handle
    );

    return $handle;
}

function php_cli_server_connect() {
    $timeout = 1.0;
    $fp = fsockopen(PHP_CLI_SERVER_HOSTNAME, PHP_CLI_SERVER_PORT, $errno, $errstr, $timeout);
    if (!$fp) {
        die("connect failed");
    }
    return $fp;
}

?>