#!/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, use_helgrind, target_tor, *args, **kwargs):
		self.use_helgrind = use_helgrind
		self.target_tor = target_tor
		super().__init__(*args, **kwargs)
		#
		self.chutney_path = '/home/sengler/code/working/chutney'
		self.tor_path = '/home/sengler/code/releases/tor-0.4.2.5'
	#
	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)]
		#
		#target_tor_path = '/home/sengler/code/working/tor/src/app/tor'
		#target_tor_path = '/home/sengler/code/releases/tor-0.4.2.5/src/app/tor'

		local_ip = '172.19.156.16'
		target_ip = '172.19.156.136'
		target_hostname = 'cluck2'

		target_optional_args = {}
		if self.target_tor is not None:
			target_optional_args['tor'] = self.target_tor
		if self.use_helgrind:
			target_optional_args['valgrind_settings'] = ['--tool=helgrind', '-v', '--suppressions=libevent.supp', '--read-var-info=yes']

		#target_optional_args['add_environ_vars'] = {'LD_PRELOAD': '/usr/lib/libprofiler.so.0'}
		target_optional_args['add_environ_vars'] = {'LD_PRELOAD': '/usr/lib/libtcmalloc_and_profiler.so.4'}
		target_optional_args['ip'] = target_ip
		target_optional_args['remote_hostname'] = target_hostname
		target_cpu_prof = False #True
		target_daemon = False
		logs = ['notice']
		#if self.use_helgrind:
		#	valgrind_settings = ['--tool=helgrind', '-v', '--suppressions=libevent.supp', '--read-var-info=yes']
		#else:
		#	valgrind_settings = None
		#

		self.nodes = [chutney_manager.Node(tag='a', relay=1, authority=1, torrc='authority.tmpl', log_files=logs) for _ in range(self.num_authorities)] + \
		    [chutney_manager.Node(tag='r', relay=1, torrc='relay-non-exit.tmpl', log_files=logs) for _ in range(self.num_guards)] + \
		    [chutney_manager.Node(tag='target', relay=1, torrc='relay-non-exit.tmpl',
		      daemon=target_daemon, log_files=logs, sandbox=0, google_cpu_profiler=target_cpu_prof, **target_optional_args)] + \
		    [chutney_manager.Node(tag='e', exit=1, torrc='relay.tmpl', log_files=logs) for _ in range(self.num_exits)] + \
		    [chutney_manager.Node(tag='c', client=1, torrc='client.tmpl', log_files=logs) for _ in range(self.num_clients)]
		#
		for node in self.nodes:
			if not 'num_cpus' in node.options:
				node.options['num_cpus'] = 2
			#
			if not 'ip' in node.options:
				node.options['ip'] = local_ip
			#
		#
		numa_remaining = numa.get_numa_overview()
		for (node, index) in zip(self.nodes, range(len(self.nodes))):
			num_cpus = node.options['num_cpus']
			if num_cpus%2 != 0:
				num_cpus += 1
			#
			if node.options['tag'] == 'target':
				num_cpus = max(num_cpus, 6)
			#
			(numa_node, processors) = chutney_manager.numa_scheduler(num_cpus, numa_remaining)
			node.options['numa_settings'] = (numa_node, processors)
		#
		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 gen_id=None: [random.choice(non_exit_fingerprints), target_fingerprint, random.choice(exit_fingerprints)]
	return lambda gen_id: [non_exit_fingerprints[gen_id%len(non_exit_fingerprints)], target_fingerprint, exit_fingerprints[gen_id%len(exit_fingerprints)]]
	'''
	fingerprints = [desc.fingerprint for desc in consensus]
	exit_fingerprints = [desc.fingerprint for desc in consensus if desc.exit_policy.can_exit_to(*server_address)]
	#
	target_fingerprint = [desc.fingerprint 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 gen_id=None: [random.choice(non_exit_fingerprints), target_fingerprint, random.choice(exit_fingerprints)]
	return lambda gen_id: [non_exit_fingerprints[gen_id%len(non_exit_fingerprints)], target_fingerprint, exit_fingerprints[gen_id%len(exit_fingerprints)]]
	'''
#
def existing_file(path):
	if not os.path.isfile(path):
		raise argparse.ArgumentTypeError('The file path is not valid')
	return path
#
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')
	parser.add_argument('--target-tor', type=existing_file, default=None,
	                    help='use a different tor binary for the target', metavar='tor-path')
	parser.add_argument('--helgrind', action='store_true',
	                    help='log helgrind data')
	args = parser.parse_args()
	#
	#num_clients = 4
	#num_guards = 6 # number of relays (including guards)
	#num_authorities = 2 # will also act as a relay or guard
	#num_exits = 8 # will be used only as an exit
	num_clients = 12
	num_guards = 14 # number of relays (including guards)
	num_authorities = 2 # will also act as a relay or guard
	num_exits = 16 # 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
	num_streams_per_client = 6
	logging.info('Starting with {} streams per client'.format(num_streams_per_client))
	#
	experiment = CustomExperiment(args.helgrind, args.target_tor, 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.__name__))
		time.sleep(duration)
		logging.info('Done sleeping')
		return func()
	#
	try:
		experiment.start_chutney(lambda: experiment.start_throughput_server(lambda: sleep_then_run(20, experiment.start_throughput_clients)))
	except KeyboardInterrupt:
		logging.info('Stopped (KeyboardInterrupt)')
	#
	logging.info('Total time: {:.2f} minutes'.format((time.time()-start_time)/60))
#