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#include <filecontainer.h>
#include <projectpart.h>
#include <projects.h>
#include <translationunitdoesnotexistexception.h>
#include <translationunitfilenotexitexception.h>
#include <translationunit.h>
#include <translationunitisnullexception.h>
#include <translationunitparseerrorexception.h>
#include <translationunits.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 <chrono>
#include <thread>


using ClangBackEnd::TranslationUnit;
using ClangBackEnd::UnsavedFiles;
using ClangBackEnd::ProjectPart;
using ClangBackEnd::TranslationUnits;

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

namespace {

class TranslationUnit : public ::testing::Test
{
protected:
    ClangBackEnd::ProjectParts projects;
    ClangBackEnd::UnsavedFiles unsavedFiles;
    ClangBackEnd::TranslationUnits translationUnits{projects, unsavedFiles};
    ::TranslationUnit translationUnit{Utf8StringLiteral(TESTDATA_DIR"/translationunits.cpp"),
                                      ProjectPart(Utf8StringLiteral("/path/to/projectfile")),
                                      translationUnits};
};

TEST_F(TranslationUnit, DefaultTranslationUnitIsInvalid)
{
    ::TranslationUnit translationUnit;

    ASSERT_TRUE(translationUnit.isNull());
}

TEST_F(TranslationUnit, ThrowExceptionForNonExistingFilePath)
{
    ASSERT_THROW(::TranslationUnit(Utf8StringLiteral("file.cpp"), ProjectPart(Utf8StringLiteral("/path/to/projectfile")), translationUnits),
                 ClangBackEnd::TranslationUnitFileNotExitsException);
}

TEST_F(TranslationUnit, ThrowNoExceptionForNonExistingFilePathIfDoNotCheckIfFileExistsIsSet)
{
    ASSERT_NO_THROW(::TranslationUnit(Utf8StringLiteral("file.cpp"), ProjectPart(Utf8StringLiteral("/path/to/projectfile")), translationUnits, ::TranslationUnit::DoNotCheckIfFileExists));
}

TEST_F(TranslationUnit, TranslationUnitIsValid)
{
    ASSERT_FALSE(translationUnit.isNull());
}


TEST_F(TranslationUnit, ThrowExceptionForGettingIndexForInvalidUnit)
{
    ::TranslationUnit translationUnit;

    ASSERT_THROW(translationUnit.index(), ClangBackEnd::TranslationUnitIsNullException);
}

TEST_F(TranslationUnit, IndexGetterIsNonNullForValidUnit)
{
    ASSERT_THAT(translationUnit.index(), NotNull());
}

TEST_F(TranslationUnit, ThrowExceptionForGettingCxTranslationUnitForInvalidUnit)
{
    ::TranslationUnit translationUnit;

    ASSERT_THROW(translationUnit.cxTranslationUnit(), ClangBackEnd::TranslationUnitIsNullException);
}

TEST_F(TranslationUnit, CxTranslationUnitGetterIsNonNullForValidUnit)
{
    ASSERT_THAT(translationUnit.cxTranslationUnit(), NotNull());
}

TEST_F(TranslationUnit, ThrowExceptionIfGettingFilePathForNullUnit)
{
   ::TranslationUnit translationUnit;

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

TEST_F(TranslationUnit, ResetedTranslationUnitIsNull)
{
    translationUnit.reset();

    ASSERT_TRUE(translationUnit.isNull());
}

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

    translationUnit.cxTranslationUnit();

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

TEST_F(TranslationUnit, TimeStampForProjectPartChangeIsUpdatedAsProjectPartIsCleared)
{
    ProjectPart projectPart = translationUnit.projectPart();
    translationUnit.cxTranslationUnit();
    auto lastChangeTimePoint = translationUnit.lastProjectPartChangeTimePoint();
    std::this_thread::sleep_for(std::chrono::steady_clock::duration(1));

    projectPart.clear();
    translationUnit.cxTranslationUnit();

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

TEST_F(TranslationUnit, DocumentRevisionInFileContainerGetter)
{
    translationUnit.setDocumentRevision(74);

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

TEST_F(TranslationUnit, DependedFilePaths)
{
    ASSERT_THAT(translationUnit.dependedFilePaths(),
                AllOf(Contains(Utf8StringLiteral(TESTDATA_DIR"/translationunits.cpp")),
                      Contains(Utf8StringLiteral(TESTDATA_DIR"/translationunits.h"))));
}

TEST_F(TranslationUnit, NoNeedForReparsingForIndependendFile)
{
    translationUnit.cxTranslationUnit();

    translationUnit.updateIsNeedingReparseIfDependencyIsMet(Utf8StringLiteral(TESTDATA_DIR"/otherfiles.h"));

    ASSERT_FALSE(translationUnit.isNeedingReparse());
}

TEST_F(TranslationUnit, NeedsReparsingForDependendFile)
{
    translationUnit.cxTranslationUnit();

    translationUnit.updateIsNeedingReparseIfDependencyIsMet(Utf8StringLiteral(TESTDATA_DIR"/translationunits.h"));

    ASSERT_TRUE(translationUnit.isNeedingReparse());
}

TEST_F(TranslationUnit, NeedsReparsingForMainFile)
{
    translationUnit.cxTranslationUnit();

    translationUnit.updateIsNeedingReparseIfDependencyIsMet(Utf8StringLiteral(TESTDATA_DIR"/translationunits.cpp"));

    ASSERT_TRUE(translationUnit.isNeedingReparse());
}

TEST_F(TranslationUnit, NeedsNoReparsingForDependendFileAfterReparsing)
{
    translationUnit.cxTranslationUnit();
    translationUnit.updateIsNeedingReparseIfDependencyIsMet(Utf8StringLiteral(TESTDATA_DIR"/translationunits.h"));

    translationUnit.cxTranslationUnit();

    ASSERT_FALSE(translationUnit.isNeedingReparse());
}

//TEST_F(TranslationUnit, ThrowParseErrorForWrongArguments)
//{
//    ProjectPart project(Utf8StringLiteral("/path/to/projectfile"));
//    project.setArguments({Utf8StringLiteral("-fblah")});
//    TranslationUnit translationUnit(Utf8StringLiteral(TESTDATA_DIR"/complete_testfile_1.cpp"), unsavedFiles, project);

//    ASSERT_THROW(translationUnit.cxTranslationUnit(), ClangBackEnd::TranslationUnitParseErrorException);
//}

}