//
// Copyright © 2017 Arm Ltd and Contributors. All rights reserved.
// SPDX-License-Identifier: MIT
//
#define BOOST_TEST_MODULE UnitTests
#include <boost/test/unit_test.hpp>

#include "UnitTests.hpp"
#include <armnn/Logging.hpp>

struct ConfigureLoggingFixture
{
    ConfigureLoggingFixture()
    {
        ConfigureLoggingTest();
    }
};

BOOST_GLOBAL_FIXTURE(ConfigureLoggingFixture);

// On Windows, duplicate the boost test logging output to the Visual Studio output window using OutputDebugString.
#if defined(_MSC_VER)

#include <boost/iostreams/filtering_stream.hpp>
#include <boost/iostreams/tee.hpp>
#include <iostream>
#include <commons/include/WindowsWrapper.hpp>

using namespace boost::iostreams;
using namespace std;

struct DebugOutputSink : boost::iostreams::sink
{
    std::streamsize write(const char* s, std::streamsize n)
    {
        // The given string is not null-terminated, so we need to copy it.
        std::string s2(s, boost::numeric_cast<size_t>(n));
        OutputDebugString(s2.c_str());
        return n;
    }
};

class SetupDebugOutput
{
public:
    SetupDebugOutput()
    {
        // Sends the output to both cout (as standard) and the debug output.
        m_OutputStream.push(tee(std::cout));
        m_OutputStream.push(m_DebugOutputSink);

        boost::unit_test::unit_test_log.set_stream(m_OutputStream);
    }
private:
    filtering_ostream m_OutputStream;
    DebugOutputSink m_DebugOutputSink;
};

BOOST_GLOBAL_FIXTURE(SetupDebugOutput);

#endif // defined(_MSC_VER)


BOOST_AUTO_TEST_SUITE(LoggerSuite)

BOOST_AUTO_TEST_CASE(LoggerTest)
{
    std::stringstream ss;

    {
        struct StreamRedirector
        {
        public:
            StreamRedirector(std::ostream& stream, std::streambuf* newStreamBuffer)
                : m_Stream(stream)
                , m_BackupBuffer(m_Stream.rdbuf(newStreamBuffer))
            {}
            ~StreamRedirector() { m_Stream.rdbuf(m_BackupBuffer); }

        private:
            std::ostream& m_Stream;
            std::streambuf* m_BackupBuffer;
        };


        StreamRedirector redirect(std::cout, ss.rdbuf());

        using namespace armnn;
        SetLogFilter(LogSeverity::Trace);
        SetAllLoggingSinks(true, false, false);


        ARMNN_LOG(trace) << "My trace message; " << -2;
        ARMNN_LOG(debug) << "My debug message; " << -1;
        ARMNN_LOG(info) << "My info message; " << 0;
        ARMNN_LOG(warning) << "My warning message; "  << 1;
        ARMNN_LOG(error) << "My error message; " << 2;
        ARMNN_LOG(fatal) << "My fatal message; "  << 3;

        SetLogFilter(LogSeverity::Fatal);

    }

    BOOST_CHECK(ss.str().find("Trace: My trace message; -2") != std::string::npos);
    BOOST_CHECK(ss.str().find("Debug: My debug message; -1") != std::string::npos);
    BOOST_CHECK(ss.str().find("Info: My info message; 0") != std::string::npos);
    BOOST_CHECK(ss.str().find("Warning: My warning message; 1") != std::string::npos);
    BOOST_CHECK(ss.str().find("Error: My error message; 2") != std::string::npos);
    BOOST_CHECK(ss.str().find("Fatal: My fatal message; 3") != std::string::npos);
}

BOOST_AUTO_TEST_SUITE_END()