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#include <cmbalivemessage.h>
#include <cmbcodecompletedmessage.h>
#include <cmbcompletecodemessage.h>
#include <cmbendmessage.h>
#include <cmbmessages.h>
#include <cmbregistertranslationunitsforcodecompletionmessage.h>
#include <cmbunregistertranslationunitsforcodecompletionmessage.h>
#include <diagnosticcontainer.h>
#include <diagnosticschangedmessage.h>
#include <requestdiagnosticsmessage.h>
#include <readmessageblock.h>
#include <sourcelocation.h>
#include <writemessageblock.h>

#include <QBuffer>
#include <QString>
#include <QVariant>

#include <vector>

#include <gmock/gmock.h>
#include <gmock/gmock-matchers.h>
#include <gtest/gtest.h>
#include "gtest-qt-printing.h"

using namespace testing;
namespace CodeModelBackeEndTest {

class ReadAndWriteMessageBlock : public ::testing::Test
{
protected:
    ReadAndWriteMessageBlock();

    virtual void SetUp() override;
    virtual void TearDown() override;

    template<class Type>
    void CompareMessage(const Type &message);

    QVariant writeCodeCompletedMessage();
    void popLastCharacterFromBuffer();
    void pushLastCharacterToBuffer();
    void readPartialMessage();

protected:
    QBuffer buffer;
    ClangBackEnd::WriteMessageBlock writeMessageBlock;
    ClangBackEnd::ReadMessageBlock readMessageBlock;
    char lastCharacter = 0;
};

ReadAndWriteMessageBlock::ReadAndWriteMessageBlock()
    :  writeMessageBlock(&buffer),
       readMessageBlock(&buffer)
{
}

void ReadAndWriteMessageBlock::SetUp()
{
    buffer.open(QIODevice::ReadWrite);
    writeMessageBlock = ClangBackEnd::WriteMessageBlock(&buffer);
    readMessageBlock = ClangBackEnd::ReadMessageBlock(&buffer);
}

void ReadAndWriteMessageBlock::TearDown()
{
    buffer.close();
}

TEST_F(ReadAndWriteMessageBlock, WriteMessageAndTestSize)
{
    writeMessageBlock.write(QVariant::fromValue(ClangBackEnd::EndMessage()));

    ASSERT_EQ(46, buffer.size());
}

TEST_F(ReadAndWriteMessageBlock, WriteSecondMessageAndTestSize)
{
    writeMessageBlock.write(QVariant::fromValue(ClangBackEnd::EndMessage()));

    ASSERT_EQ(46, buffer.size());
}

TEST_F(ReadAndWriteMessageBlock, WriteTwoMessagesAndTestCount)
{
    writeMessageBlock.write(QVariant::fromValue(ClangBackEnd::EndMessage()));
    writeMessageBlock.write(QVariant::fromValue(ClangBackEnd::EndMessage()));

    ASSERT_EQ(2, writeMessageBlock.counter());
}

TEST_F(ReadAndWriteMessageBlock, ReadThreeMessagesAndTestCount)
{
    writeMessageBlock.write(QVariant::fromValue(ClangBackEnd::EndMessage()));
    writeMessageBlock.write(QVariant::fromValue(ClangBackEnd::EndMessage()));
    writeMessageBlock.write(QVariant::fromValue(ClangBackEnd::EndMessage()));
    buffer.seek(0);

    ASSERT_EQ(3, readMessageBlock.readAll().count());
}

TEST_F(ReadAndWriteMessageBlock, CompareEndMessage)
{
    CompareMessage(ClangBackEnd::EndMessage());
}

TEST_F(ReadAndWriteMessageBlock, CompareAliveMessage)
{
    CompareMessage(ClangBackEnd::AliveMessage());
}

TEST_F(ReadAndWriteMessageBlock, CompareRegisterTranslationUnitForCodeCompletionMessage)
{
    ClangBackEnd::FileContainer fileContainer(Utf8StringLiteral("foo.cpp"), Utf8StringLiteral("pathToProject.pro"));
    QVector<ClangBackEnd::FileContainer> fileContainers({fileContainer});

    CompareMessage(ClangBackEnd::RegisterTranslationUnitForCodeCompletionMessage(fileContainers));
}

TEST_F(ReadAndWriteMessageBlock, CompareUnregisterFileForCodeCompletionMessage)
{
    ClangBackEnd::FileContainer fileContainer(Utf8StringLiteral("foo.cpp"), Utf8StringLiteral("pathToProject.pro"));

    CompareMessage(ClangBackEnd::UnregisterTranslationUnitsForCodeCompletionMessage({fileContainer}));
}

TEST_F(ReadAndWriteMessageBlock, CompareCompleteCodeMessage)
{
    CompareMessage(ClangBackEnd::CompleteCodeMessage(Utf8StringLiteral("foo.cpp"), 24, 33, Utf8StringLiteral("do what I want")));
}

TEST_F(ReadAndWriteMessageBlock, CompareCodeCompletedMessage)
{
    ClangBackEnd::CodeCompletions codeCompletions({Utf8StringLiteral("newFunction()")});

    CompareMessage(ClangBackEnd::CodeCompletedMessage(codeCompletions, 1));
}

TEST_F(ReadAndWriteMessageBlock, CompareDiagnosticsChangedMessage)
{
    ClangBackEnd::FileContainer fileContainer(Utf8StringLiteral("foo.cpp"),
                                              Utf8StringLiteral("projectId"));
    ClangBackEnd::DiagnosticContainer container(Utf8StringLiteral("don't do that"),
                                                Utf8StringLiteral("warning"),
                                                {Utf8StringLiteral("-Wpadded"), Utf8StringLiteral("-Wno-padded")},
                                                ClangBackEnd::DiagnosticSeverity::Warning,
                                                {Utf8StringLiteral("foo.cpp"), 20u, 103u},
                                                {{{Utf8StringLiteral("foo.cpp"), 20u, 103u}, {Utf8StringLiteral("foo.cpp"), 20u, 110u}}},
                                                {},
                                                {});

    CompareMessage(ClangBackEnd::DiagnosticsChangedMessage(fileContainer,
                                                           {container},
                                                           1));
}

TEST_F(ReadAndWriteMessageBlock, RequestDiagnosticsMessage)
{
    ClangBackEnd::FileContainer fileContainer(Utf8StringLiteral("foo.cpp"), Utf8StringLiteral("pathToProject.pro"));

    CompareMessage(ClangBackEnd::RequestDiagnosticsMessage(fileContainer, 1));
}

TEST_F(ReadAndWriteMessageBlock, GetInvalidMessageForAPartialBuffer)
{
    writeCodeCompletedMessage();
    popLastCharacterFromBuffer();
    buffer.seek(0);

    readPartialMessage();
}

TEST_F(ReadAndWriteMessageBlock, ReadMessageAfterInterruption)
{
    const QVariant writeMessage = writeCodeCompletedMessage();
    popLastCharacterFromBuffer();
    buffer.seek(0);
    readPartialMessage();
    pushLastCharacterToBuffer();

    ASSERT_EQ(readMessageBlock.read(), writeMessage);
}

QVariant ReadAndWriteMessageBlock::writeCodeCompletedMessage()
{
    ClangBackEnd::CodeCompletedMessage message(ClangBackEnd::CodeCompletions({Utf8StringLiteral("newFunction()")}), 1);
    const QVariant writeMessage = QVariant::fromValue(message);
    writeMessageBlock.write(writeMessage);

    return writeMessage;
}

void ReadAndWriteMessageBlock::popLastCharacterFromBuffer()
{
    auto &internalBuffer = buffer.buffer();
    lastCharacter = internalBuffer.at(internalBuffer.size() - 1);
    internalBuffer.chop(1);
}

void ReadAndWriteMessageBlock::pushLastCharacterToBuffer()
{
    buffer.buffer().push_back(lastCharacter);
}

void ReadAndWriteMessageBlock::readPartialMessage()
{
    QVariant readMessage = readMessageBlock.read();

    ASSERT_FALSE(readMessage.isValid());
}

template<class Type>
void ReadAndWriteMessageBlock::CompareMessage(const Type &message)
{
    const QVariant writeMessage = QVariant::fromValue(message);
    writeMessageBlock.write(writeMessage);
    buffer.seek(0);

    const QVariant readMessage = readMessageBlock.read();

    ASSERT_EQ(writeMessage, readMessage);
}

}