#!/usr/bin/env python3
# Copyright (c) 2016 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 various net timeouts.

- Create three bitcoind nodes:

    no_verack_node - we never send a verack in response to their version
    no_version_node - we never send a version (only a ping)
    no_send_node - we never send any P2P message.

- Start all three nodes
- Wait 1 second
- Assert that we're connected
- Send a ping to no_verack_node and no_version_node
- Wait 30 seconds
- Assert that we're still connected
- Send a ping to no_verack_node and no_version_node
- Wait 31 seconds
- Assert that we're no longer connected (timeout to receive version/verack is 60 seconds)
"""

from time import sleep

from test_framework.mininode import *
from test_framework.test_framework import BitcoinTestFramework
from test_framework.util import *

class TestNode(NodeConnCB):
    def __init__(self):
        super().__init__()
        self.connected = False
        self.received_version = False

    def on_open(self, conn):
        self.connected = True

    def on_close(self, conn):
        self.connected = False

    def on_version(self, conn, message):
        # Don't send a verack in response
        self.received_version = True

class TimeoutsTest(BitcoinTestFramework):
    def __init__(self):
        super().__init__()
        self.setup_clean_chain = True
        self.num_nodes = 1

    def setup_network(self):
        self.nodes = []

        # Start up node0 to be a version 1, pre-segwit node.
        self.nodes = start_nodes(self.num_nodes, self.options.tmpdir)

    def run_test(self):
        # Setup the p2p connections and start up the network thread.
        self.no_verack_node = TestNode() # never send verack
        self.no_version_node = TestNode() # never send version (just ping)
        self.no_send_node = TestNode() # never send anything

        connections = []
        connections.append(NodeConn('127.0.0.1', p2p_port(0), self.nodes[0], self.no_verack_node))
        connections.append(NodeConn('127.0.0.1', p2p_port(0), self.nodes[0], self.no_version_node, send_version=False))
        connections.append(NodeConn('127.0.0.1', p2p_port(0), self.nodes[0], self.no_send_node, send_version=False))
        self.no_verack_node.add_connection(connections[0])
        self.no_version_node.add_connection(connections[1])
        self.no_send_node.add_connection(connections[2])

        NetworkThread().start()  # Start up network handling in another thread

        sleep(1)

        assert(self.no_verack_node.connected)
        assert(self.no_version_node.connected)
        assert(self.no_send_node.connected)

        ping_msg = msg_ping()
        connections[0].send_message(ping_msg)
        connections[1].send_message(ping_msg)

        sleep(30)

        assert(self.no_verack_node.received_version)

        assert(self.no_verack_node.connected)
        assert(self.no_version_node.connected)
        assert(self.no_send_node.connected)

        connections[0].send_message(ping_msg)
        connections[1].send_message(ping_msg)

        sleep(31)

        assert(not self.no_verack_node.connected)
        assert(not self.no_version_node.connected)
        assert(not self.no_send_node.connected)

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