#!/usr/bin/env python3
# Copyright (c) 2020 The Bitcoin Core developers
# Distributed under the MIT software license, see the accompanying
# file COPYING or http://www.opensource.org/licenses/mit-license.php.
"""
Test addrv2 relay
"""

import time

from test_framework.messages import (
    CAddress,
    msg_addrv2,
    NODE_NETWORK,
    NODE_WITNESS,
)
from test_framework.p2p import P2PInterface
from test_framework.test_framework import BitcoinTestFramework
from test_framework.util import assert_equal

I2P_ADDR = "c4gfnttsuwqomiygupdqqqyy5y5emnk5c73hrfvatri67prd7vyq.b32.i2p"

ADDRS = []
for i in range(10):
    addr = CAddress()
    addr.time = int(time.time()) + i
    addr.nServices = NODE_NETWORK | NODE_WITNESS
    # Add one I2P address at an arbitrary position.
    if i == 5:
        addr.net = addr.NET_I2P
        addr.ip = I2P_ADDR
    else:
        addr.ip = f"123.123.123.{i % 256}"
    addr.port = 8333 + i
    ADDRS.append(addr)


class AddrReceiver(P2PInterface):
    addrv2_received_and_checked = False

    def __init__(self):
        super().__init__(support_addrv2 = True)

    def on_addrv2(self, message):
        expected_set = set((addr.ip, addr.port) for addr in ADDRS)
        received_set = set((addr.ip, addr.port) for addr in message.addrs)
        if expected_set == received_set:
            self.addrv2_received_and_checked = True

    def wait_for_addrv2(self):
        self.wait_until(lambda: "addrv2" in self.last_message)


class AddrTest(BitcoinTestFramework):
    def set_test_params(self):
        self.setup_clean_chain = True
        self.num_nodes = 1
        self.extra_args = [["-whitelist=addr@127.0.0.1"]]

    def run_test(self):
        self.log.info('Create connection that sends addrv2 messages')
        addr_source = self.nodes[0].add_p2p_connection(P2PInterface())
        msg = msg_addrv2()

        self.log.info('Send too-large addrv2 message')
        msg.addrs = ADDRS * 101
        with self.nodes[0].assert_debug_log(['addrv2 message size = 1010']):
            addr_source.send_and_ping(msg)

        self.log.info('Check that addrv2 message content is relayed and added to addrman')
        addr_receiver = self.nodes[0].add_p2p_connection(AddrReceiver())
        msg.addrs = ADDRS
        with self.nodes[0].assert_debug_log([
                # The I2P address is not added to node's own addrman because it has no
                # I2P reachability (thus 10 - 1 = 9).
                'Added 9 addresses from 127.0.0.1: 0 tried',
                'received: addrv2 (159 bytes) peer=0',
                'sending addrv2 (159 bytes) peer=1',
        ]):
            addr_source.send_and_ping(msg)
            self.nodes[0].setmocktime(int(time.time()) + 30 * 60)
            addr_receiver.wait_for_addrv2()

        assert addr_receiver.addrv2_received_and_checked
        assert_equal(len(self.nodes[0].getnodeaddresses(count=0, network="i2p")), 0)


if __name__ == '__main__':
    AddrTest().main()