#!/usr/bin/python3
#
import basic_protocols
import logging
import enum
import time
import socket
#
class ClientConnectionProtocol(basic_protocols.Protocol):
	def __init__(self, endpoint, data, proxy=None, username=None):
		self.endpoint = endpoint
		self.data = data
		self.proxy = proxy
		self.username = username
		#
		self.states = enum.Enum('CLIENT_CONN_STATES', 'READY_TO_BEGIN CONNECT_TO_PROXY SEND_DATA DONE')
		self.state = self.states.READY_TO_BEGIN
		#
		self.socket = socket.socket()
		self.sub_protocol = None
		#
		if self.proxy is None:
			logging.debug('Socket %d connecting to endpoint %r...', self.socket.fileno(), self.endpoint)
			self.socket.connect(self.endpoint)
		else:
			logging.debug('Socket %d connecting to proxy %r...', self.socket.fileno(), self.proxy)
			self.socket.connect(self.proxy)
		#
	#
	def _run_iteration(self, block=True):
		if self.state is self.states.READY_TO_BEGIN:
			if self.proxy is None:
				self.sub_protocol = basic_protocols.SendDataProtocol(self.socket, self.data)
				self.state = self.states.SEND_DATA
			else:
				#self.sub_protocol = basic_protocols.Socks4Protocol(self.socket, self.endpoint, username=self.username)
				self.sub_protocol = basic_protocols.WeirdProtocol(self.socket, self.endpoint)
				self.state = self.states.CONNECT_TO_PROXY
			#
		#
		if self.state is self.states.CONNECT_TO_PROXY:
			if self.sub_protocol.run(block=block):
				self.sub_protocol = basic_protocols.SendDataProtocol(self.socket, self.data)
				self.state = self.states.SEND_DATA
			#
		#
		if self.state is self.states.SEND_DATA:
			if self.sub_protocol.run(block=block):
				self.state = self.states.DONE
				return True
			#
		#
		return False
	#
#
class ServerConnectionProtocol(basic_protocols.Protocol):
	def __init__(self, socket, conn_id, data_callback=None):
		self.socket = socket
		self.conn_id = conn_id
		self.data_callback = data_callback
		#
		self.states = enum.Enum('SERVER_CONN_STATES', 'READY_TO_BEGIN RECV_DATA DONE')
		self.state = self.states.READY_TO_BEGIN
		#
		self.sub_protocol = None
	#
	def _run_iteration(self, block=True):
		if self.state is self.states.READY_TO_BEGIN:
			self.sub_protocol = basic_protocols.ReceiveDataProtocol(self.socket)
			self.state = self.states.RECV_DATA
		#
		if self.state is self.states.RECV_DATA:
			if self.sub_protocol.run(block=block):
				self.data_callback(self.conn_id, self.sub_protocol.received_data)
				self.state = self.states.DONE
				return True
			#
		#
		return False
	#
#
if __name__ == '__main__':
	import sys
	logging.basicConfig(level=logging.DEBUG)
	#
	import random
	random.seed(10)
	data_to_send = bytearray(random.getrandbits(8) for _ in range(1024*1024*100))
	#
	print('Generated bytes')
	#
	if sys.argv[1] == 'client':
		import os
		#
		endpoint = ('127.0.0.1', 4747)
		#endpoint = ('127.0.0.1', 8627)
		#proxy = ('127.0.0.1', 9003+int(sys.argv[3])-1)
		#proxy = ('127.0.0.1', 9003)
		proxy = ('127.0.0.1', 12849)
		#proxy = None
		username = bytes([x for x in os.urandom(12) if x != 0])
		#username = None
		#
		client = ClientConnectionProtocol(endpoint, data_to_send, proxy=proxy, username=username)
		client.run()
		#
	elif sys.argv[1] == 'server':
		import multiprocessing
		import queue
		#
		endpoint = ('127.0.0.1', 4747)
		processes = []
		processes_map = {}
		joinable_connections = multiprocessing.Queue()
		conn_counter = [0]
		group_queue = multiprocessing.Queue()
		bw_queue = multiprocessing.Queue()
		#
		def data_callback(conn_id, data):
			# check data here
			print('Received {} MB'.format(len(data)/(1024**2)))
			print('Data matches: {}'.format(data==data_to_send))
		#
		def start_server_conn(socket, conn_id):
			server = ServerConnectionProtocol(socket, conn_id, data_callback=data_callback)
			try:
				server.run()
			except KeyboardInterrupt:
				socket.close()
			finally:
				joinable_connections.put(conn_id)
			#
		#
		def accept_callback(socket):
			conn_id = conn_counter[0]
			conn_counter[0] += 1
			#logging.debug('Adding connection %d', conn_id)
			p = multiprocessing.Process(target=start_server_conn, args=(socket, conn_id))
			processes.append(p)
			processes_map[conn_id] = p
			p.start()
			socket.close()
			# close this process' copy of the socket
		#
		l = basic_protocols.ServerListener(endpoint, accept_callback)
		#
		try:
			while True:
				l.accept()
				try:
					while True:
						conn_id = joinable_connections.get(False)
						p = processes_map[conn_id]
						p.join()
					#
				except queue.Empty:
					pass
				#
			#
		except KeyboardInterrupt:
			print()
		#
		for p in processes:
			p.join()
		#
	#
#