/**
* @license Apache-2.0
*
* Copyright (c) 2019 The Stdlib Authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
*    http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/

'use strict';

var net = require( 'net' );
var stdin = require( '@stdlib/streams/node/stdin' );
var stdout = require( '@stdlib/streams/node/stdout' );

// Create a new TCP connection:
var socket = net.connect( 1337 );

// Setup data flow:
stdin.pipe( socket );
socket.pipe( stdout );

// Listen for socket events:
socket.on( 'connect', onConnect );
socket.on( 'close', onClose );

// Listen for `stdin` events:
stdin.on( 'end', onEnd );
stdin.on( 'data', onData );

function onConnect() {
	// Upon establishing a TCP connection, switch `stdin` to "raw" mode:
	stdin.setRawMode( true );
}

function onClose() {
	socket.removeListener( 'close', onClose );
}

function onEnd() {
	// Upon no longer receiving `stdin` data, we need to ensure we close the TCP connection:
	socket.destroy();
	console.log();
}

function onData( buf ) {
	// Detect an end of transmission (EOT) ASCII character, which indicates a desire to close the `stdin` stream...
	if ( buf.length === 1 && buf[ 0 ] === 4 ) {
		stdin.pause();
		stdin.setRawMode( false );
		stdin.emit( 'end' );
	}
}