<?php
namespace App\Console\Commands;

use Illuminate\Console\Command;

class PanasonicCtiProbeCommand extends Command
{
    protected $signature = 'cti:probe-panasonic
        {--host=192.168.0.101 : Panasonic host/IP}
        {--port=33333 : Panasonic CTI TCP port}
        {--timeout=5 : Connect and read timeout in seconds}
        {--send= : Optional ASCII payload to send after connect}
        {--read-bytes=512 : Max bytes to read from socket}
        {--hex : Print payload and response as hex dump}';

    protected $description = 'Probe the Panasonic CTI TCP endpoint and print the first response bytes for protocol analysis.';

    public function handle(): int
    {
        $host      = (string) $this->option('host');
        $port      = max(1, (int) $this->option('port'));
        $timeout   = max(1, (int) $this->option('timeout'));
        $send      = (string) ($this->option('send') ?? '');
        $readBytes = max(1, min(8192, (int) $this->option('read-bytes')));
        $hex       = (bool) $this->option('hex');

        $this->line("Connessione a {$host}:{$port} con timeout {$timeout}s...");

        $socket = @stream_socket_client("tcp://{$host}:{$port}", $errno, $errstr, $timeout);
        if (! is_resource($socket)) {
            $this->error("Connessione fallita ({$errno}): {$errstr}");
            return self::FAILURE;
        }

        stream_set_timeout($socket, $timeout);
        stream_set_blocking($socket, true);
        $this->info('Connessione stabilita.');

        if ($send !== '') {
            fwrite($socket, $send);
            $this->line($hex ? ('Payload inviato (hex): ' . strtoupper(bin2hex($send))) : ('Payload inviato: ' . $send));
        }

        $response = fread($socket, $readBytes);
        $response = is_string($response) ? $response : '';
        $meta     = stream_get_meta_data($socket);
        fclose($socket);

        if ($response === '') {
            $this->warn('Nessun banner o risposta immediata letta dalla socket.');
            if (($meta['timed_out'] ?? false) === true) {
                $this->line('La lettura è andata in timeout senza dati.');
            }

            $this->line('Nota: su Linux non possiamo implementare un TAPI/TSP nativo Panasonic senza specifica protocollo o middleware proprietario.');
            return self::SUCCESS;
        }

        if ($hex) {
            $this->line('Risposta (hex):');
            $this->line(strtoupper(implode(' ', str_split(bin2hex($response), 2))));
        }

        $printable = preg_replace('/[^\P{C}\n\r\t]/u', '.', $response);
        $this->line('Risposta (testo best-effort):');
        $this->line($printable === '' ? '[vuota]' : $printable);
        $this->line('Nota: su Linux non possiamo implementare un TAPI/TSP nativo Panasonic senza specifica protocollo o middleware proprietario.');

        return self::SUCCESS;
    }
}