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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 TestUtils.cpp
 * @author Marek Kotewicz <marek@ethdev.com>
 * @date 2015
 */

#include <thread>
#include <boost/test/unit_test.hpp>
#include <boost/filesystem.hpp>
#include <libtestutils/Common.h>
#include <libtestutils/BlockChainLoader.h>
#include <libtestutils/FixedClient.h>
#include "TestUtils.h"

using namespace std;
using namespace dev;
using namespace dev::eth;
using namespace dev::test;

namespace dev
{
namespace test
{

bool getCommandLineOption(std::string const& _name);
std::string getCommandLineArgument(std::string const& _name, bool _require = false);

}
}

bool dev::test::getCommandLineOption(string const& _name)
{
    auto argc = boost::unit_test::framework::master_test_suite().argc;
    auto argv = boost::unit_test::framework::master_test_suite().argv;
    bool result = false;
    for (auto i = 0; !result && i < argc; ++i)
        result = _name == argv[i];
    return result;
}

std::string dev::test::getCommandLineArgument(string const& _name, bool _require)
{
    auto argc = boost::unit_test::framework::master_test_suite().argc;
    auto argv = boost::unit_test::framework::master_test_suite().argv;
    for (auto i = 1; i < argc; ++i)
    {
        string str = argv[i];
        if (_name == str.substr(0, _name.size()))
            return str.substr(str.find("=") + 1);
    }
    if (_require)
        BOOST_ERROR("Failed getting command line argument: " << _name << " from: " << argv);
    return "";
}

LoadTestFileFixture::LoadTestFileFixture()
{
    m_json = loadJsonFromFile(toTestFilePath(getCommandLineArgument("--eth_testfile")));
}

void ParallelFixture::enumerateThreads(std::function<void()> callback) const
{
    size_t threadsCount = std::stoul(getCommandLineArgument("--eth_threads"), nullptr, 10);
    
    vector<thread> workers;
    for (size_t i = 0; i < threadsCount; i++)
        workers.emplace_back(callback);
    
    for_each(workers.begin(), workers.end(), [](thread &t)
    {
        t.join();
    });
}

void BlockChainFixture::enumerateBlockchains(std::function<void(Json::Value const&, dev::eth::BlockChain const&, State state)> callback) const
{
    for (string const& name: m_json.getMemberNames())
    {
        BlockChainLoader bcl(m_json[name]);
        callback(m_json[name], bcl.bc(), bcl.state());
    }
}

void ClientBaseFixture::enumerateClients(std::function<void(Json::Value const&, dev::eth::ClientBase&)> callback) const
{
    enumerateBlockchains([&callback](Json::Value const& _json, BlockChain const& _bc, State _state) -> void
    {
        FixedClient client(_bc, _state);
        callback(_json, client);
    });
}

void ParallelClientBaseFixture::enumerateClients(std::function<void(Json::Value const&, dev::eth::ClientBase&)> callback) const
{
    ClientBaseFixture::enumerateClients([this, &callback](Json::Value const& _json, dev::eth::ClientBase& _client) -> void
    {
        // json is being copied here
        enumerateThreads([callback, _json, &_client]() -> void
        {
            callback(_json, _client);
        });
    });
}