#!/usr/bin/perl
#
# Script Written by Hansen33
# Discord: hansen33#2541
#
# Dero name service
# https://docs.dero.io/rtd_pages/dev_dvm.html#nameservice

# Check if name is registered
# curl http://127.0.0.1:40402/json_rpc -d '{"jsonrpc":"2.0","id":"0","method":"nametoaddress","params":{"name":"TESTUSERNAME" }}' -H 'Content-Type: application/json'

# Register 
# curl http://127.0.0.1:40403/json_rpc -d '{"jsonrpc":"2.0","id":"0","method":"scinvoke","params":{"scid":"0000000000000000000000000000000000000000000000000000000000000001","ringsize":2, "sc_rpc":[{"name":"entrypoint","datatype":"S","value":"Register"}, {"name":"name","datatype":"S","value":"TESTUSERNAME" }] }}' -H 'Content-Type: application/json'

$|=1;

use warnings;
use strict;

use JSON;
use Data::Dumper;
use WWW::Curl::Easy;

use FindBin;
use lib "$FindBin::RealBin/../lib";
use Curses::UI;

# options
use Getopt::Long;
my %options;
GetOptions(
        'daemon-rpc=s'   => \$options{'daemon-rpc'},
        'wallet-rpc=s'   => \$options{'wallet-rpc'},
        'name=s'   => \$options{'name'},
);

my $daemon = 'https://dero-node.mysrv.cloud';
$daemon = $options{'daemon-rpc'} if $options{'daemon-rpc'};

my $wallet_rpc = '127.0.0.0:10103';
$wallet_rpc = $options{'wallet-rpc'} if $options{'wallet-rpc'};

my $name = 'MySrvCloud';
$name = $options{'name'} if $options{'name'};

my $check = check_name($name);

if (defined $check and $check->{'status'} eq 'OK') {
	printf "Name: (%s) is taken by this address (%s)\n", $check->{'name'}, $check->{'address'};
} else {
	printf "Name: (%s) is FREE - Do you want to register it?\n", $name;
}

print "Checking wallet RPC\n";
my $count = 0;
while (not defined check_wallet_rpc() and $count < 10) {

	print "Please start wallet with --rpc-server option\n" if $count == 0;

	sleep 1;

	$count++;
}

#exit

my $reg = register($name);
print Dumper($reg);

sub register {

	my $name = shift;

	# Register 
	# curl http://127.0.0.1:40403/json_rpc -d '{"jsonrpc":"2.0","id":"0","method":"scinvoke","params":{"scid":"0000000000000000000000000000000000000000000000000000000000000001","ringsize":2, "sc_rpc":[{"name":"entrypoint","datatype":"S","value":"Register"}, {"name":"name","datatype":"S","value":"TESTUSERNAME" }] }}' -H 'Content-Type: application/json'

	my $data = {
		'jsonrpc' => '2.0',
		'id' => 0,
		'method' => 'scinvoke',
		'params' => {
			'scid' => '0000000000000000000000000000000000000000000000000000000000000001',
			'ringsize' => 2,
			'sc_rpc' => [
				{
					'name' => 'entrypoint',
					'datatype' => 'S',
					'value' => 'Register',
				},
				{
					'name' => 'name',
					'datatype' => 'S',
					'valye' => $name,
				}
			],
		},
	};

	my $url = sprintf '%s/json_rpc', $daemon;

        my $status = decode_json( post_url($url, $data) );

        return $status->{'result'};

}

sub check_wallet_rpc {

	my ($ip,$port) = split /:/, $wallet_rpc;

        my $cmd = sprintf 'timeout 1 /usr/bin/nc -z %s %d', $ip, $port;

        system "$cmd >/dev/null 2>&1";

        if ( $? == 0 ) {
        	return 1;
        }

	return;
}

sub check_name {

        my $name   = shift;

	# Check if name is registered
	# curl http://127.0.0.1:40402/json_rpc -d '{"jsonrpc":"2.0","id":"0","method":"nametoaddress","params":{"name":"TESTUSERNAME" }}' -H 'Content-Type: application/json'

	my $data = {
		'jsonrpc' => '2.0',
		'id' => 0,
		'method' => 'nametoaddress',
		'params' => {
			'name' => $name,
		},
	};

	my $url = sprintf '%s/json_rpc', $daemon;


        my $status = decode_json( post_url($url, $data) );

        return $status->{'result'};

}

sub post_url {


        my $url  = shift;
        my $data = shift;

        my $response_data;


        my $curl = WWW::Curl::Easy->new();
        $curl->setopt( CURLOPT_URL,     $url );

        $curl->setopt( CURLOPT_POSTFIELDS,    encode_json($data) );
        $curl->setopt( CURLOPT_HTTPHEADER, [ 'Content-Type: application/json' ]);
        $curl->setopt( CURLOPT_FOLLOWLOCATION, 1);
        $curl->setopt( CURLOPT_WRITEDATA,       \$response_data );

        my $return_code   = $curl->perform();
        my $response_code = $curl->getinfo(CURLINFO_RESPONSE_CODE);

        # If curl fails to get the URL - report the error and exit
        if ( $return_code != 0 ) {
                die "Failed to contact RPC API : $url";
        }

        return $response_data;

}