#!/usr/bin/python3
#
import argparse
import shutil
import logging
import random
import os
import multiprocessing
import threading
import time
import json
import gzip
import pickle
import tempfile
#
import stem.control
import stem.descriptor.remote
import stem.process
#
import numa
import log_system_usage
import chutney_manager
import throughput_server
import experiment_client
import experiment
import useful
#
class CustomExperiment(experiment.Experiment):
	def __init__(self, *args, **kwargs):
		super().__init__(*args, **kwargs)
		#
		self.chutney_path = '/home/sengler/code/measureme/chutney'
		self.tor_path = '/home/sengler/code/parallel/tor-single'
	#
	def configure_chutney(self):
		#self.nodes = [chutney_manager.Node(tag='a', relay=1, authority=1, torrc='authority.tmpl') for _ in range(self.num_authorities)] + \
		#        [chutney_manager.Node(tag='r', relay=1, torrc='relay-non-exit.tmpl') for _ in range(self.num_guards)] + \
		#        [chutney_manager.Node(tag='e', exit=1, torrc='relay.tmpl') for _ in range(self.num_exits)] + \
		#        [chutney_manager.Node(tag='c', client=1, torrc='client.tmpl') for _ in range(self.num_clients)]
		#
		new_tor_path = '/home/sengler/code/parallel/tor-parallel/src/app/tor'
		valgrind_settings = ['--tool=helgrind', '-v', '--suppressions=libevent.supp', '--read-var-info=yes']
		#
		self.nodes = [chutney_manager.Node(tag='a', relay=1, authority=1, torrc='authority.tmpl') for _ in range(self.num_authorities)] + \
		        [chutney_manager.Node(tag='r', relay=1, torrc='relay-non-exit.tmpl') for _ in range(self.num_guards)] + \
		        [chutney_manager.Node(tag='target', tor=new_tor_path, valgrind_settings=valgrind_settings, relay=1, torrc='relay-non-exit.tmpl')] + \
		        [chutney_manager.Node(tag='e', exit=1, torrc='relay.tmpl') for _ in range(self.num_exits)] + \
		        [chutney_manager.Node(tag='c', client=1, torrc='client.tmpl') for _ in range(self.num_clients)]
		#
		self.proxy_control_ports = [self.nodes[x].guess_control_port(x) for x in range(len(self.nodes)) if ('client', 1) in self.nodes[x].options.items()]
		# TODO: ^^ improve this
	#
#
def build_circuit_generator(consensus, server_address):
	fingerprints = [desc.nickname for desc in consensus]
	exit_fingerprints = [desc.nickname for desc in consensus if desc.exit_policy.can_exit_to(*server_address)]
	#
	target_fingerprint = [desc.nickname for desc in consensus if desc.nickname.endswith('target')][0]
	non_exit_fingerprints = list(set(fingerprints)-set(exit_fingerprints)-set([target_fingerprint]))
	#
	assert len(exit_fingerprints) >= 1, 'Need at least one exit relay'
	assert len(non_exit_fingerprints) >= 1, 'Need at least one non-exit relay'
	#
	return lambda: [random.choice(non_exit_fingerprints), target_fingerprint, random.choice(exit_fingerprints)]
#
if __name__ == '__main__':
	#
	logging.basicConfig(level=logging.DEBUG)
	logging.getLogger('stem').setLevel(logging.WARNING)
	#
	parser = argparse.ArgumentParser(description='Test the network throughput.')
	parser.add_argument('num_bytes', type=useful.parse_bytes,
	                    help='number of bytes to send per connection (can also end with \'B\', \'KiB\', \'MiB\', or \'GiB\')', metavar='num-bytes')
	parser.add_argument('--buffer-len', type=useful.parse_bytes,
	                    help='size of the send and receive buffers (can also end with \'B\', \'KiB\', \'MiB\', or \'GiB\')', metavar='bytes')
	parser.add_argument('--wait-range', type=int, default=0,
	                    help='add a random wait time to each connection so that they don\'t all start at the same time (default is 0)', metavar='time')
	args = parser.parse_args()
	#
	num_clients = 2
	num_guards = 2 # number of relays (including guards)
	num_authorities = 2 # will also act as a relay or guard
	num_exits = 3 # will be used only as an exit
	#
	experiment_time = time.time()
	#
	save_data_path = None
	measureme_log_path = None
	measureme = False
	#
	start_time = time.time()
	#
	num_streams_per_client = 1
	logging.info('Starting with {} streams per client'.format(num_streams_per_client))
	#
	experiment = CustomExperiment(save_data_path, measureme_log_path, args.num_bytes, num_streams_per_client,
	                              num_clients, num_guards, num_authorities, num_exits, build_circuit_generator,
	                              args.buffer_len, args.wait_range, measureme, test_network=False)
	#
	def sleep_then_run(duration, func):
		logging.info('Sleeping for {} seconds before running {}'.format(duration, func))
		time.sleep(duration)
		return func()
	#
	experiment.start_chutney(lambda: experiment.start_throughput_server(lambda: sleep_then_run(20, experiment.start_throughput_clients)))
	#
	logging.info('Total time: {:.2f} minutes'.format((time.time()-start_time)/60))
#