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** Copyright (C) 2016 The Qt Company Ltd.
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** General Public License version 3 as published by the Free Software
** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
** included in the packaging of this file. Please review the following
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#include <clangfilepath.h>
#include <clangtranslationunitupdater.h>
#include <commandlinearguments.h>
#include <diagnosticset.h>
#include <highlightingmarks.h>
#include <filecontainer.h>
#include <projectpart.h>
#include <projectpartcontainer.h>
#include <projects.h>
#include <translationunitdoesnotexistexception.h>
#include <translationunitfilenotexitexception.h>
#include <clangdocument.h>
#include <clangtranslationunitcore.h>
#include <translationunitisnullexception.h>
#include <translationunitparseerrorexception.h>
#include <clangdocuments.h>
#include <unsavedfiles.h>
#include <utf8string.h>

#include <clang-c/Index.h>

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

#include <QTemporaryFile>

#include <chrono>
#include <thread>

using ClangBackEnd::FileContainer;
using ClangBackEnd::FilePath;
using ClangBackEnd::Document;
using ClangBackEnd::UnsavedFiles;
using ClangBackEnd::ProjectPart;
using ClangBackEnd::ProjectPartContainer;
using ClangBackEnd::Documents;
using ClangBackEnd::TranslationUnitUpdateResult;

using testing::IsNull;
using testing::NotNull;
using testing::Eq;
using testing::Gt;
using testing::Contains;
using testing::EndsWith;
using testing::AllOf;

namespace {

class Document : public ::testing::Test
{
protected:
    void SetUp() override;
    ::Document createDocumentAndDeleteFile();
    QByteArray readContentFromDocumentFile() const;

protected:
    ClangBackEnd::ProjectParts projects;
    Utf8String projectPartId{Utf8StringLiteral("/path/to/projectfile")};
    ProjectPart projectPart;
    Utf8String documentFilePath = Utf8StringLiteral(TESTDATA_DIR"/translationunits.cpp");
    ClangBackEnd::UnsavedFiles unsavedFiles;
    ClangBackEnd::Documents documents{projects, unsavedFiles};
    ::Document document;
};

TEST_F(Document, DefaultDocumentIsInvalid)
{
    ::Document document;

    ASSERT_TRUE(document.isNull());
}

TEST_F(Document, DefaultDocumentIsNotIntact)
{
    ::Document document;

    ASSERT_FALSE(document.isIntact());
}

TEST_F(Document, ThrowExceptionForNonExistingFilePath)
{
    ASSERT_THROW(::Document(Utf8StringLiteral("file.cpp"), projectPart, Utf8StringVector(), documents),
                 ClangBackEnd::TranslationUnitFileNotExitsException);
}

TEST_F(Document, ThrowNoExceptionForNonExistingFilePathIfDoNotCheckIfFileExistsIsSet)
{
    ASSERT_NO_THROW(::Document(Utf8StringLiteral("file.cpp"), projectPart, Utf8StringVector(), documents, ::Document::DoNotCheckIfFileExists));
}

TEST_F(Document, DocumentIsValid)
{
    ASSERT_FALSE(document.isNull());
}


TEST_F(Document, ThrowExceptionForGettingIndexForInvalidUnit)
{
    ::Document document;

    ASSERT_THROW(document.translationUnitCore().cxIndex(), ClangBackEnd::TranslationUnitIsNullException);
}

TEST_F(Document, ThrowExceptionForGettingCxTranslationUnitForInvalidUnit)
{
    ::Document document;

    ASSERT_THROW(document.translationUnitCore().cxIndex(), ClangBackEnd::TranslationUnitIsNullException);
}

TEST_F(Document, CxTranslationUnitGetterIsNonNullForParsedUnit)
{
    document.parse();

    ASSERT_THAT(document.translationUnitCore().cxIndex(), NotNull());
}

TEST_F(Document, ThrowExceptionIfGettingFilePathForNullUnit)
{
   ::Document document;

    ASSERT_THROW(document.filePath(), ClangBackEnd::TranslationUnitIsNullException);
}

TEST_F(Document, ResettedDocumentIsNull)
{
    document.reset();

    ASSERT_TRUE(document.isNull());
}

TEST_F(Document, LastCommandLineArgumentIsFilePath)
{
    const Utf8String nativeFilePath = FilePath::toNativeSeparators(documentFilePath);
    const auto arguments = document.createUpdater().commandLineArguments();

    ASSERT_THAT(arguments.at(arguments.count() - 1), Eq(nativeFilePath));
}

TEST_F(Document, TimeStampForProjectPartChangeIsUpdatedAsNewCxTranslationUnitIsGenerated)
{
    auto lastChangeTimePoint = document.lastProjectPartChangeTimePoint();
    std::this_thread::sleep_for(std::chrono::steady_clock::duration(1));

    document.parse();

    ASSERT_THAT(document.lastProjectPartChangeTimePoint(), Gt(lastChangeTimePoint));
}

TEST_F(Document, TimeStampForProjectPartChangeIsUpdatedAsProjectPartIsCleared)
{
    ProjectPart projectPart = document.projectPart();
    document.parse();
    auto lastChangeTimePoint = document.lastProjectPartChangeTimePoint();
    std::this_thread::sleep_for(std::chrono::steady_clock::duration(1));

    projectPart.clear();
    document.parse();

    ASSERT_THAT(document.lastProjectPartChangeTimePoint(), Gt(lastChangeTimePoint));
}

TEST_F(Document, DocumentRevisionInFileContainerGetter)
{
    document.setDocumentRevision(74);

    ASSERT_THAT(document.fileContainer().documentRevision(), 74);
}

TEST_F(Document, DependedFilePaths)
{
    document.parse();

    ASSERT_THAT(document.dependedFilePaths(),
                AllOf(Contains(documentFilePath),
                      Contains(Utf8StringLiteral(TESTDATA_DIR"/translationunits.h"))));
}

TEST_F(Document, DeletedFileShouldNotNeedReparsing)
{
    auto document = createDocumentAndDeleteFile();

    document.setDirtyIfDependencyIsMet(document.filePath());

    ASSERT_FALSE(document.isNeedingReparse());
}

TEST_F(Document, NeedsNoReparseAfterCreation)
{
    ASSERT_FALSE(document.isNeedingReparse());
}

TEST_F(Document, NeedsReparseAfterChangeOfMainFile)
{
    document.parse();

    document.setDirtyIfDependencyIsMet(documentFilePath);

    ASSERT_TRUE(document.isNeedingReparse());
}

TEST_F(Document, NoNeedForReparsingForIndependendFile)
{
    document.parse();

    document.setDirtyIfDependencyIsMet(Utf8StringLiteral(TESTDATA_DIR"/otherfiles.h"));

    ASSERT_FALSE(document.isNeedingReparse());
}

TEST_F(Document, NeedsReparsingForDependendFile)
{
    document.parse();

    document.setDirtyIfDependencyIsMet(Utf8StringLiteral(TESTDATA_DIR"/translationunits.h"));

    ASSERT_TRUE(document.isNeedingReparse());
}

TEST_F(Document, NeedsNoReparsingAfterReparsing)
{
    document.parse();
    document.setDirtyIfDependencyIsMet(Utf8StringLiteral(TESTDATA_DIR"/translationunits.h"));

    document.reparse();

    ASSERT_FALSE(document.isNeedingReparse());
}

TEST_F(Document, IsIntactAfterParsing)
{
    document.parse();

    ASSERT_TRUE(document.isIntact());
}

TEST_F(Document, IsNotIntactForDeletedFile)
{
    auto document = createDocumentAndDeleteFile();

    ASSERT_FALSE(document.isIntact());
}

TEST_F(Document, DoesNotNeedReparseAfterParse)
{
    document.parse();

    ASSERT_FALSE(document.isNeedingReparse());
}

TEST_F(Document, NeedsReparseAfterMainFileChanged)
{
    document.parse();

    document.setDirtyIfDependencyIsMet(documentFilePath);

    ASSERT_TRUE(document.isNeedingReparse());
}

TEST_F(Document, NeedsReparseAfterIncludedFileChanged)
{
    document.parse();

    document.setDirtyIfDependencyIsMet(Utf8StringLiteral(TESTDATA_DIR"/translationunits.h"));

    ASSERT_TRUE(document.isNeedingReparse());
}

TEST_F(Document, DoesNotNeedReparseAfterNotIncludedFileChanged)
{
    document.parse();

    document.setDirtyIfDependencyIsMet(Utf8StringLiteral(TESTDATA_DIR"/otherfiles.h"));

    ASSERT_FALSE(document.isNeedingReparse());
}

TEST_F(Document, DoesNotNeedReparseAfterReparse)
{
    document.parse();
    document.setDirtyIfDependencyIsMet(documentFilePath);

    document.reparse();

    ASSERT_FALSE(document.isNeedingReparse());
}

TEST_F(Document, SetDirtyIfProjectPartIsOutdated)
{
    projects.createOrUpdate({ProjectPartContainer(projectPartId)});
    document.parse();
    projects.createOrUpdate({ProjectPartContainer(projectPartId, {Utf8StringLiteral("-DNEW")})});

    document.setDirtyIfProjectPartIsOutdated();

    ASSERT_TRUE(document.isNeedingReparse());
}

TEST_F(Document, SetNotDirtyIfProjectPartIsNotOutdated)
{
    document.parse();

    document.setDirtyIfProjectPartIsOutdated();

    ASSERT_FALSE(document.isNeedingReparse());
}

TEST_F(Document, IncorporateUpdaterResultResetsDirtyness)
{
    document.setDirtyIfDependencyIsMet(document.filePath());
    TranslationUnitUpdateResult result;
    result.reparsed = true;
    result.needsToBeReparsedChangeTimePoint = document.isNeededReparseChangeTimePoint();

    document.incorporateUpdaterResult(result);

    ASSERT_FALSE(document.isNeedingReparse());
}

TEST_F(Document, IncorporateUpdaterResultDoesNotResetDirtynessIfItWasChanged)
{
    TranslationUnitUpdateResult result;
    result.reparsed = true;
    result.needsToBeReparsedChangeTimePoint = std::chrono::steady_clock::now();
    document.setDirtyIfDependencyIsMet(document.filePath());

    document.incorporateUpdaterResult(result);

    ASSERT_TRUE(document.isNeedingReparse());
}

void Document::SetUp()
{
    projects.createOrUpdate({ProjectPartContainer(projectPartId)});
    projectPart = *projects.findProjectPart(projectPartId);

    const QVector<FileContainer> fileContainer{FileContainer(documentFilePath, projectPartId)};
    const auto createdDocuments = documents.create(fileContainer);
    document = createdDocuments.front();
}

::Document Document::createDocumentAndDeleteFile()
{
    QTemporaryFile temporaryFile;
    EXPECT_TRUE(temporaryFile.open());
    EXPECT_TRUE(temporaryFile.write(readContentFromDocumentFile()));
    ::Document document(temporaryFile.fileName(),
                        projectPart,
                        Utf8StringVector(),
                        documents);

    return document;
}

QByteArray Document::readContentFromDocumentFile() const
{
    QFile contentFile(documentFilePath);
    EXPECT_TRUE(contentFile.open(QIODevice::ReadOnly));

    return contentFile.readAll();
}

}