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/*
    This file is part of cpp-ethereum.

    cpp-ethereum 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.

    cpp-ethereum 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 cpp-ethereum.  If not, see <http://www.gnu.org/licenses/>.
*/
/** @file peer.cpp
 * @author Gav Wood <i@gavwood.com>
 * @date 2014
 * Peer Network test functions.
 */

#include <boost/test/unit_test.hpp>
#include <chrono>
#include <thread>
#include <libp2p/Host.h>
using namespace std;
using namespace dev;
using namespace dev::p2p;

BOOST_AUTO_TEST_SUITE(p2p)

BOOST_AUTO_TEST_CASE(host)
{
    auto oldLogVerbosity = g_logVerbosity;
    g_logVerbosity = 10;
    
    NetworkPreferences host1prefs("127.0.0.1", 30301, false);
    NetworkPreferences host2prefs("127.0.0.1", 30302, false);
    
    Host host1("Test", host1prefs);
    host1.start();
        
    Host host2("Test", host2prefs);
    auto node2 = host2.id();
    host2.start();
    
    host1.addNode(node2, bi::address::from_string("127.0.0.1"), host2prefs.listenPort, host2prefs.listenPort);
    
    this_thread::sleep_for(chrono::seconds(3));
    
    auto host1peerCount = host1.peerCount();
    auto host2peerCount = host2.peerCount();
    BOOST_REQUIRE_EQUAL(host1peerCount, 1);
    BOOST_REQUIRE_EQUAL(host2peerCount, 1);
    
    g_logVerbosity = oldLogVerbosity;
}

BOOST_AUTO_TEST_CASE(networkConfig)
{
    Host save("Test", NetworkPreferences(false));
    bytes store(save.saveNetwork());
    
    Host restore("Test", NetworkPreferences(false), bytesConstRef(&store));
    BOOST_REQUIRE(save.id() == restore.id());
}

BOOST_AUTO_TEST_CASE(save_nodes)
{
    std::list<Host*> hosts;
    for (auto i:{0,1,2,3,4,5})
    {
        Host* h = new Host("Test", NetworkPreferences("127.0.0.1", 30300 + i, false));
        h->setIdealPeerCount(10);
        // starting host is required so listenport is available
        h->start();
        while (!h->isStarted())
            this_thread::sleep_for(chrono::milliseconds(2));
        hosts.push_back(h);
    }
    
    Host& host = *hosts.front();
    for (auto const& h: hosts)
        host.addNode(h->id(), bi::address::from_string("127.0.0.1"), h->listenPort(), h->listenPort());
    
    Host& host2 = *hosts.back();
    for (auto const& h: hosts)
        host2.addNode(h->id(), bi::address::from_string("127.0.0.1"), h->listenPort(), h->listenPort());

    this_thread::sleep_for(chrono::milliseconds(2000));
    bytes firstHostNetwork(host.saveNetwork());
    bytes secondHostNetwork(host.saveNetwork());
    
    BOOST_REQUIRE_EQUAL(sha3(firstHostNetwork), sha3(secondHostNetwork));
    
    BOOST_CHECK_EQUAL(host.peerCount(), 5);
    BOOST_CHECK_EQUAL(host2.peerCount(), 5);
    
    RLP r(firstHostNetwork);
    BOOST_REQUIRE(r.itemCount() == 3);
    BOOST_REQUIRE(r[0].toInt<unsigned>() == dev::p2p::c_protocolVersion);
    BOOST_REQUIRE_EQUAL(r[1].toBytes().size(), 32); // secret
    BOOST_REQUIRE_EQUAL(r[2].itemCount(), 5);
}

BOOST_AUTO_TEST_SUITE_END()

int peerTest(int argc, char** argv)
{
    Public remoteAlias;
    short listenPort = 30303;
    string remoteHost;
    short remotePort = 30303;
    
    for (int i = 1; i < argc; ++i)
    {
        string arg = argv[i];
        if (arg == "-l" && i + 1 < argc)
            listenPort = (short)atoi(argv[++i]);
        else if (arg == "-r" && i + 1 < argc)
            remoteHost = argv[++i];
        else if (arg == "-p" && i + 1 < argc)
            remotePort = (short)atoi(argv[++i]);
        else if (arg == "-ra" && i + 1 < argc)
            remoteAlias = Public(dev::fromHex(argv[++i]));
        else
            remoteHost = argv[i];
    }

    Host ph("Test", NetworkPreferences(listenPort));

    if (!remoteHost.empty() && !remoteAlias)
        ph.addNode(remoteAlias, bi::address::from_string(remoteHost), remotePort, remotePort);

    this_thread::sleep_for(chrono::milliseconds(200));

    return 0;
}