#!/usr/bin/env python3
# Copyright (c) 2015-2023 Savoir-faire Linux Inc.
# Author: Adrien Béraud <adrien.beraud@savoirfairelinux.com>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; If not, see <https://www.gnu.org/licenses/>.

import asyncio
import time

from opendht import aio as dht


async def main():
	config = dht.DhtConfig()
	config.setRateLimit(-1, -1)

	ping_node = dht.DhtRunner()
	pong_node = dht.DhtRunner()
	# ping_node.enableLogging()
	# pong_node.enableLogging()
	# ping_node.bootstrap("bootstrap.jami.net", "4222")
	await asyncio.gather(
		ping_node.run(config=config),
		pong_node.run(config=config),
	)
	await pong_node.ping(ping_node.getBound())

	net = [dht.DhtRunner() for _ in range(1, 10)]
	await asyncio.gather(*(n.run(config=config) for n in net))
	await asyncio.gather(*(n.ping(ping_node.getBound()) for n in net))

	MAX = 2048
	counter = 0
	loc_ping = dht.InfoHash.get(f"ping-{ping_node.getNodeId()}")
	loc_pong = dht.InfoHash.get(str(loc_ping))

	async def ponger(listener_node: dht.DhtRunner, listen_key, responder_node: dht.DhtRunner, respond_key):
		nonlocal counter
		with listener_node.listen(listen_key) as listener:
			async for value, expired in listener:
				if not expired:
					await responder_node.put(respond_key, dht.Value(b"hey"))
					counter += 1
					if counter >= MAX:
						break

	start = time.time()
	await asyncio.gather(
		ponger(ping_node, loc_ping, pong_node, loc_pong),
		ponger(pong_node, loc_pong, ping_node, loc_ping),
		pong_node.put(loc_ping, dht.Value(b"hey"))
	)
	duration = time.time() - start

	await asyncio.gather(
		ping_node.shutdown(),
		pong_node.shutdown(),
		*(n.shutdown() for n in net),
	)

	print(MAX, "ping-pong done, took", duration, "s")
	print(1000 * duration / MAX, "ms per rt", MAX / duration, "rt per s")


if __name__ == "__main__":
	asyncio.run(main())