#!/usr/bin/env python

import socket
import sys

HOST = "127.0.0.1"
PORT = 9001

def client(n):
	global HOST, PORT
	sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
	sock.connect((HOST, PORT))
	while n > 0:
		sock.send(str(n))
		data = sock.recv(20)
		sys.stdout.write("%02d: %s" % (n, data))
		n -= 1
	sock.close()

def server():
	global HOST, PORT
	sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
	sock.bind((HOST, PORT))
	sock.listen(1)
	while True:
		conn, addr = sock.accept()
		conn.setblocking(1)
		while True:
			i = 0
			try:
				i = int(conn.recv(20))
			except:
				break
			s = ""
			if (i % 3) == 0:
				s += "fizz"
			if (i % 5) == 0:
				s += "buzz"
			conn.send(s + "\n")
			if i == 0:
				break
		conn.close()

if __name__ == '__main__':
	if len(sys.argv) < 2:
		print("Usage: %s <client|server> [number]" % sys.argv[0])
		exit(1)
	if sys.argv[1] == "client":
		if len(sys.argv) < 3:
			print("Usage: %s <client|server> [number]" % sys.argv[0])
			exit(1)
		client(int(sys.argv[2]))
	elif sys.argv[1] == "server":
		server()
	else:
		print("Usage: %s <client|server> [number]" % sys.argv[0])
		exit(1)