//
// VMime library (http://www.vmime.org)
// Copyright (C) 2002-2013 Vincent Richard <vincent@vmime.org>
//
// This program 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.
//
// This program 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 this program; if not, write to the Free Software Foundation, Inc.,
// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
//
// Linking this library statically or dynamically with other modules is making
// a combined work based on this library.  Thus, the terms and conditions of
// the GNU General Public License cover the whole combination.
//

#include <sys/time.h>
#include <time.h>

#include <iostream>
#include <vector>
#include <algorithm>
#include <memory>

#include <cppunit/XmlOutputter.h>
#include <cppunit/extensions/TestFactoryRegistry.h>
#include <cppunit/ui/text/TestRunner.h>
#include <cppunit/TestListener.h>
#include <cppunit/TestResult.h>
#include <cppunit/TestResultCollector.h>
#include <cppunit/TestFailure.h>
#include <cppunit/SourceLine.h>
#include <cppunit/Exception.h>
#include <cppunit/tools/XmlDocument.h>
#include <cppunit/tools/XmlElement.h>

#include "vmime/vmime.hpp"
#include "vmime/platforms/posix/posixHandler.hpp"


class Clock
{
public:

	void reset()
	{
		struct timezone tz;

		gettimeofday(&m_start, &tz);
	}

	double getDuration() const
	{
		struct timeval tv;
		struct timezone tz;

		gettimeofday(&tv, &tz);

		return static_cast <double>(tv.tv_sec - m_start.tv_sec)
			+ static_cast <double>(tv.tv_usec - m_start.tv_usec) / 1000000.0;
	}

private:

	struct timeval m_start;
};


class XmlTestListener : public CppUnit::TestListener
{
public:

	XmlTestListener()
		: m_doc("utf-8"), m_testElt(NULL)
	{
		m_doc.setRootElement(new CppUnit::XmlElement("TestRun"));
	}

	void startTest(CppUnit::Test* test)
	{
		m_testElt = new CppUnit::XmlElement("Test");
		m_suiteElt.back()->addElement(m_testElt);

		m_testElt->addElement(new CppUnit::XmlElement("Name", test->getName()));

		m_chrono.reset();
	}

	void addFailure(const CppUnit::TestFailure& failure)
	{
		CppUnit::XmlElement* failElt = new CppUnit::XmlElement("Failure");
		m_testElt->addElement(failElt);

		failElt->addElement(new CppUnit::XmlElement("FailureType",
			failure.isError() ? "Error" : "Assertion"));

		if (failure.sourceLine().isValid())
		{
			CppUnit::XmlElement* locElt = new CppUnit::XmlElement("Location");
			failElt->addElement(locElt);

			locElt->addElement(new CppUnit::XmlElement("File", failure.sourceLine().fileName()));
			locElt->addElement(new CppUnit::XmlElement("Line", failure.sourceLine().lineNumber()));
		}

		CppUnit::XmlElement* exElt = new CppUnit::XmlElement("Exception");
		failElt->addElement(exElt);

		exElt->addElement(new CppUnit::XmlElement("Message", failure.thrownException()->what()));
	}

	void endTest(CppUnit::Test* /* test */)
	{
		std::ostringstream ossTime;
		ossTime << (m_chrono.getDuration() * 1000.0);

		m_testElt->addElement(new CppUnit::XmlElement("Time", ossTime.str()));

		m_testElt = NULL;
	}

	void startSuite(CppUnit::Test* suite)
	{
		if (suite->getName() == "All Tests")
			return;

		CppUnit::XmlElement* suiteElt = new CppUnit::XmlElement("Suite");

		if (m_suiteElt.size() == 0)
			m_doc.rootElement().addElement(suiteElt);
		else
			m_suiteElt.back()->addElement(suiteElt);

		m_suiteElt.push_back(suiteElt);

		suiteElt->addElement(new CppUnit::XmlElement("Name", suite->getName()));
	}

	void endSuite(CppUnit::Test* /* suite */)
	{
		if (m_suiteElt.size())
			m_suiteElt.pop_back();
	}

	void startTestRun(CppUnit::Test* /* test */, CppUnit::TestResult* /* eventManager */)
	{
	}

	void endTestRun(CppUnit::Test* /* test */, CppUnit::TestResult* /* eventManager */)
	{
	}

	void output(std::ostream& os)
	{
		os << m_doc.toString();
	}

private:

	Clock m_chrono;

	CppUnit::XmlDocument m_doc;
	std::vector <CppUnit::XmlElement*> m_suiteElt;
	CppUnit::XmlElement* m_testElt;
};



// see testUtils.hpp

std::vector <std::string>& getTestModules()
{
	static std::vector <std::string> allModules;
	return allModules;
}


void registerTestModule(const char* name_)
{
	std::vector <std::string>& testModules = getTestModules();
	std::string name(name_);

	if (std::find(testModules.begin(), testModules.end(), name) == testModules.end())
		testModules.push_back(name);
}


const std::string getNormalizedPath(const std::string& path)
{
	std::string res = path;

	for (std::size_t i = 0, n = res.length() ; i < n ; ++i)
	{
		if (res[i] == '\\')
			res[i] = '/';
	}

	return res;
}


const std::string getFileNameFromPath(const std::string& path)
{
	const std::size_t pos = path.find_last_of('/');

	if (pos == std::string::npos)
		return "";

	return path.substr(pos + 1);
}


static char g_moduleNameBuffer[2048];


const char* getTestModuleNameFromSourceFile(const char *path_)
{
	static const std::string testRunnerPath(getNormalizedPath(__FILE__));
	static const std::string testRunnerFileName(getFileNameFromPath(testRunnerPath));

	const std::string path = getNormalizedPath(path_);

	// "/path/to/testRunner.cpp" --> "/path/to/"
	const std::string basePath
		(testRunnerPath.begin(), testRunnerPath.end() - testRunnerFileName.length());

	// "/path/to/module/testFile.cpp" --> "module/testFile.cpp"
	const std::string testFileName(getFileNameFromPath(path));
	const std::string testPath(path.begin() + basePath.length(), path.end());

	// "module/testFile.cpp" --> "module"
	const std::string moduleName(testPath.substr(0, testPath.length() - testFileName.length() - 1));
	std::copy(moduleName.begin(), moduleName.end(), g_moduleNameBuffer);
	g_moduleNameBuffer[moduleName.length()] = 0;

	return g_moduleNameBuffer;
}


int main(int argc, char* argv[])
{
	// Parse arguments
	bool xmlOutput = false;

	for (int c = 1 ; c < argc ; ++c)
	{
		const std::string arg = argv[c];

		if (arg == "--xml")
			xmlOutput = true;
	}

	// Run the tests
	if (xmlOutput)
	{
		// Get the test suites from the registry and add them to the list of tests to run
		CppUnit::TestRunner runner;

		for (unsigned int i = 0 ; i < getTestModules().size() ; ++i)
		{
			runner.addTest(CppUnit::TestFactoryRegistry::
				getRegistry(getTestModules()[i]).makeTest());
		}

		XmlTestListener xmlListener;

		CppUnit::TestResult controller;
		controller.addListener(&xmlListener);

		CppUnit::TestResultCollector result;
		controller.addListener(&result);

		runner.run(controller);

		xmlListener.output(std::cout);

		// Return error code 1 if a test failed
		return result.wasSuccessful() ? 0 : 1;
	}
	else
	{
		// Get the top level suite from the registry
		CppUnit::TextUi::TestRunner runner;
		runner.addTest(CppUnit::TestFactoryRegistry::getRegistry().makeTest());

		return runner.run() ? 0 : 1;
	}
}

