<?php

namespace App;

class BOB {
    private $sock;

    protected $options = [
        "bob_host"    => "127.0.0.1",
        "bob_port"    => "2827",
        "bob_options" => "inbound.quantity=5 outbound.quantity=5 inbound.length=1 outbound.length=1 i2cp.leaseSetType=3",
        "bob_nick"    => "hostchecker",
    ];

    public function __construct(array $options = [])
    {
        ob_implicit_flush();

        $this->options = array_merge($this->options, (array) $options);

        $this->sock = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
        if ($this->sock === false)
        {
            throw new \ErrorException("socket_create() failed: reason: " . socket_strerror(socket_last_error()));
        }
        else
        {
            $result = socket_connect($this->sock, $this->options["bob_host"], $this->options["bob_port"]);
            if ($result === false)
            {
                throw new \ErrorException("socket_connect() failed.\nReason: ($result) " . socket_strerror(socket_last_error($socket)));
            }

            /* Reading BOB greeting */
            $response = socket_read($this->sock, 1024);

            if(!preg_match('/OK/', $response))
            {
                throw new \ErrorException("BOB returned incorrect response on connect");
            }
        }
    }

    public function __destruct()
    {
        $command = "quit\n";

        socket_write($this->sock, $command, strlen($command));
        socket_read($this->sock, 1024, PHP_NORMAL_READ);

        socket_close($this->sock);
    }

    public function setnick()
    {
        $command = "setnick " . $this->options["bob_nick"] . "\n";
        socket_write($this->sock, $command, strlen($command));

        $response = socket_read($this->sock, 1024, PHP_NORMAL_READ);
        if(!preg_match('/^OK/', $response))
            echo "BOB response: " . $response;
    }

    public function options()
    {
        $options = explode(" ", $this->options["bob_options"]);

        foreach($options as $option)
        {
            $command = "option " . $option . "\n";
            socket_write($this->sock, $command, strlen($command));

            $response = socket_read($this->sock, 1024, PHP_NORMAL_READ);
            if(!preg_match('/^OK/', $response))
                echo "BOB response: " . $response;
        }
    }

    public function newkeys()
    {
        $command = "newkeys\n";
        socket_write($this->sock, $command, strlen($command));

        $response = socket_read($this->sock, 1024, PHP_NORMAL_READ);
        if(!preg_match('/^OK/', $response))
            echo "BOB response: " . $response;
    }

    public function start()
    {
        $command = "start\n";
        socket_write($this->sock, $command, strlen($command));

        $response = socket_read($this->sock, 1024, PHP_NORMAL_READ);
        if(!preg_match('/^OK/', $response))
            echo "BOB response: " . $response;
    }

    public function intun()
    {
        $command = "inhost 127.0.0.1\n";
        socket_write($this->sock, $command, strlen($command));

        $response = socket_read($this->sock, 1024, PHP_NORMAL_READ);
        if(!preg_match('/^OK/', $response))
            echo "BOB response: " . $response;

        $command = "inport " . rand(1024, 65535) . "\n";
        socket_write($this->sock, $command, strlen($command));

        $response = socket_read($this->sock, 1024, PHP_NORMAL_READ);
        if(!preg_match('/^OK/', $response))
            echo "BOB response: " . $response;
    }

    public function getnick()
    {
        $command = "getnick " . $this->options["bob_nick"] . "\n";
        socket_write($this->sock, $command, strlen($command));

        $response = socket_read($this->sock, 1024, PHP_NORMAL_READ);
        if(!preg_match('/^OK/', $response))
            echo "BOB response: " . $response;
    }

    public function lookup(string $address): bool
    {
        $command = "lookup " . $address . "\n";
        socket_write($this->sock, $command, strlen($command));

        $response = socket_read($this->sock, 1024, PHP_NORMAL_READ);

        if(preg_match('/^OK/', $response))
            return true;

        return false;
    }

    public function stop()
    {
        $command = "stop\n";
        socket_write($this->sock, $command, strlen($command));

        $response = socket_read($this->sock, 1024, PHP_NORMAL_READ);
        if(!preg_match('/^OK/', $response))
            echo "BOB response: " . $response;
    }

    public function clear()
    {
        $command = "clear\n";
        socket_write($this->sock, $command, strlen($command));

        $response = socket_read($this->sock, 1024, PHP_NORMAL_READ);
        if(!preg_match('/^OK/', $response))
            echo "BOB response: " . $response;
    }

    public function zap()
    {
        $command = "zap\n";
        socket_write($this->sock, $command, strlen($command));

        $response = socket_read($this->sock, 1024, PHP_NORMAL_READ);
        if(!preg_match('/^OK/', $response))
            echo "BOB response: " . $response;
    }
}