/*
	This file is part of solidity.

	solidity 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.

	solidity 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 solidity.  If not, see <http://www.gnu.org/licenses/>.
*/
// SPDX-License-Identifier: GPL-3.0
/** @file boostTest.cpp
 * @author Marko Simovic <markobarko@gmail.com>
 * @date 2014
 * Stub for generating main boost.test module.
 * Original code taken from boost sources.
 */

#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wunused-parameter"

#if defined(_MSC_VER)
#pragma warning(push)
#pragma warning(disable:4535) // calling _set_se_translator requires /EHa
#endif
#include <boost/test/unit_test.hpp>
#include <boost/test/tree/traverse.hpp>
#if defined(_MSC_VER)
#pragma warning(pop)
#endif

#pragma GCC diagnostic pop

#include <test/InteractiveTests.h>
#include <test/Common.h>
#include <test/EVMHost.h>

#include <boost/algorithm/string.hpp>
#include <boost/algorithm/string/predicate.hpp>
#include <boost/filesystem.hpp>
#include <string>

using namespace boost::unit_test;
using namespace solidity::frontend::test;
namespace fs = boost::filesystem;
using namespace std;

namespace
{
void removeTestSuite(std::string const& _name)
{
	master_test_suite_t& master = framework::master_test_suite();
	auto id = master.get(_name);
	soltestAssert(id != INV_TEST_UNIT_ID, "Removing non-existent test suite!");
	master.remove(id);
}

/**
 * Class that traverses the boost test tree and removes unit tests that are
 * not in the current batch.
 */
class BoostBatcher: public test_tree_visitor
{
public:
	BoostBatcher(solidity::test::Batcher& _batcher):
		m_batcher(_batcher)
	{}

	void visit(test_case const& _testCase) override
	{
		if (!m_batcher.checkAndAdvance())
			// disabling them would be nicer, but it does not work like this:
			// const_cast<test_case&>(_testCase).p_run_status.value = test_unit::RS_DISABLED;
			m_path.back()->remove(_testCase.p_id);
	}
	bool test_suite_start(test_suite const& _testSuite) override
	{
		m_path.push_back(&const_cast<test_suite&>(_testSuite));
		return test_tree_visitor::test_suite_start(_testSuite);
	}
	void test_suite_finish(test_suite const& _testSuite) override
	{
		m_path.pop_back();
		test_tree_visitor::test_suite_finish(_testSuite);
	}

private:
	solidity::test::Batcher& m_batcher;
	std::vector<test_suite*> m_path;
};


void runTestCase(TestCase::Config const& _config, TestCase::TestCaseCreator const& _testCaseCreator)
{
	try
	{
		stringstream errorStream;
		auto testCase = _testCaseCreator(_config);
		if (testCase->shouldRun())
			switch (testCase->run(errorStream))
			{
				case TestCase::TestResult::Success:
					break;
				case TestCase::TestResult::Failure:
					BOOST_ERROR("Test expectation mismatch.\n" + errorStream.str());
					break;
				case TestCase::TestResult::FatalError:
					BOOST_ERROR("Fatal error during test.\n" + errorStream.str());
					break;
			}
	}
	catch (boost::exception const& _e)
	{
		BOOST_ERROR("Exception during extracted test: " << boost::diagnostic_information(_e));
	}
	catch (std::exception const& _e)
	{
		BOOST_ERROR("Exception during extracted test: " << boost::diagnostic_information(_e));
	}
	catch (...)
	{
		BOOST_ERROR("Unknown exception during extracted test: " << boost::current_exception_diagnostic_information());
	}
}

int registerTests(
	boost::unit_test::test_suite& _suite,
	boost::filesystem::path const& _basepath,
	boost::filesystem::path const& _path,
	vector<string> const& _labels,
	TestCase::TestCaseCreator _testCaseCreator,
	solidity::test::Batcher& _batcher
)
{
	int numTestsAdded = 0;
	fs::path fullpath = _basepath / _path;
	TestCase::Config config{
		fullpath.string(),
		solidity::test::CommonOptions::get().evmVersion(),
		solidity::test::CommonOptions::get().eofVersion(),
		solidity::test::CommonOptions::get().vmPaths,
		solidity::test::CommonOptions::get().enforceGasTest,
		solidity::test::CommonOptions::get().enforceGasTestMinValue,
	};
	if (fs::is_directory(fullpath))
	{
		test_suite* sub_suite = BOOST_TEST_SUITE(_path.filename().string());
		for (auto const& entry: boost::iterator_range<fs::directory_iterator>(
			fs::directory_iterator(fullpath),
			fs::directory_iterator()
		))
			if (
				solidity::test::isValidSemanticTestPath(entry) &&
				(fs::is_directory(entry.path()) || TestCase::isTestFilename(entry.path().filename()))
			)
				numTestsAdded += registerTests(
					*sub_suite,
					_basepath, _path / entry.path().filename(),
					_labels,
					_testCaseCreator,
					_batcher
				);
		_suite.add(sub_suite);
	}
	else
	{
		// TODO would be better to set the test to disabled.
		if (_batcher.checkAndAdvance())
		{
			// This must be a vector of unique_ptrs because Boost.Test keeps the equivalent of a string_view to the filename
			// that is passed in. If the strings were stored directly in the vector, pointers/references to them would be
			// invalidated on reallocation.
			static vector<unique_ptr<string const>> filenames;

			filenames.emplace_back(make_unique<string>(_path.string()));
			auto test_case = make_test_case(
				[config, _testCaseCreator]
				{
					BOOST_REQUIRE_NO_THROW({
						runTestCase(config, _testCaseCreator);
					});
				},
				_path.stem().string(),
				*filenames.back(),
				0
			);
			for (auto const& _label: _labels)
				test_case->add_label(_label);
			_suite.add(test_case);
			numTestsAdded = 1;
		}
	}
	return numTestsAdded;
}

bool initializeOptions()
{
	auto const& suite = boost::unit_test::framework::master_test_suite();

	auto options = std::make_unique<solidity::test::CommonOptions>();
	bool shouldContinue = options->parse(suite.argc, suite.argv);
	if (!shouldContinue)
		return false;
	options->validate();

	solidity::test::CommonOptions::setSingleton(std::move(options));
	return true;
}

}

// TODO: Prototype -- why isn't this declared in the boost headers?
// TODO: replace this with a (global) fixture.
test_suite* init_unit_test_suite(int /*argc*/, char* /*argv*/[]);

test_suite* init_unit_test_suite(int /*argc*/, char* /*argv*/[])
{
	using namespace solidity::test;

	master_test_suite_t& master = framework::master_test_suite();
	master.p_name.value = "SolidityTests";

	try
	{
		bool shouldContinue = initializeOptions();
		if (!shouldContinue)
			exit(EXIT_SUCCESS);

		if (!solidity::test::loadVMs(solidity::test::CommonOptions::get()))
			exit(EXIT_FAILURE);

		if (solidity::test::CommonOptions::get().disableSemanticTests)
			cout << endl << "--- SKIPPING ALL SEMANTICS TESTS ---" << endl << endl;

		if (!solidity::test::CommonOptions::get().enforceGasTest)
			cout << endl << "WARNING :: Gas Cost Expectations are not being enforced" << endl << endl;

		Batcher batcher(CommonOptions::get().selectedBatch, CommonOptions::get().batches);
		if (CommonOptions::get().batches > 1)
			cout << "Batch " << CommonOptions::get().selectedBatch << " out of " << CommonOptions::get().batches << endl;

		// Batch the boost tests
		BoostBatcher boostBatcher(batcher);
		traverse_test_tree(master, boostBatcher, true);

		// Include the interactive tests in the automatic tests as well
		for (auto const& ts: g_interactiveTestsuites)
		{
			auto const& options = solidity::test::CommonOptions::get();

			if (ts.smt && options.disableSMT)
				continue;

			if (ts.needsVM && solidity::test::CommonOptions::get().disableSemanticTests)
				continue;

			//TODO
			//solAssert(
			registerTests(
				master,
				options.testPath / ts.path,
				ts.subpath,
				ts.labels,
				ts.testCaseCreator,
				batcher
			);
			// > 0, std::string("no ") + ts.title + " tests found");
		 }

		if (solidity::test::CommonOptions::get().disableSemanticTests)
		{
			for (auto suite: {
				"ABIDecoderTest",
				"ABIEncoderTest",
				"SolidityAuctionRegistrar",
				"SolidityWallet",
				"GasMeterTests",
				"GasCostTests",
				"SolidityEndToEndTest",
				"SolidityOptimizer"
			})
				removeTestSuite(suite);
		}
	}
	catch (solidity::test::ConfigException const& exception)
	{
		cerr << exception.what() << endl;
		exit(EXIT_FAILURE);
	}
	catch (std::runtime_error const& exception)
	{
		cerr << exception.what() << endl;
		exit(EXIT_FAILURE);
	}

	return nullptr;
}

// BOOST_TEST_DYN_LINK should be defined if user want to link against shared boost test library
#ifdef BOOST_TEST_DYN_LINK

// Because we want to have customized initialization function and support shared boost libraries at the same time,
// we are forced to customize the entry point.
// see: https://www.boost.org/doc/libs/1_67_0/libs/test/doc/html/boost_test/adv_scenarios/shared_lib_customizations/init_func.html

int main(int argc, char* argv[])
{
	auto init_unit_test = []() -> bool { init_unit_test_suite(0, nullptr); return true; };
	return boost::unit_test::unit_test_main(init_unit_test, argc, argv);
}

#endif