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

#include <clang-c/Index.h>

#include <translationunit.h>
#include <unsavedfiles.h>
#include <utf8string.h>
#include <projectpart.h>
#include <translationunits.h>
#include <filecontainer.h>
#include <projectpartcontainer.h>
#include <projects.h>
#include <translationunitdoesnotexistexception.h>
#include <translationunitisnullexception.h>
#include <translationunitfilenotexitexception.h>
#include <projectpartsdonotexistexception.h>

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

using testing::IsNull;
using testing::NotNull;
using testing::Gt;
using testing::Not;
using testing::Contains;

namespace {

using ::testing::PrintToString;

MATCHER_P2(IsTranslationUnit, filePath, projectPartId,
           std::string(negation ? "isn't" : "is") + " translation unit with file path "
           + PrintToString(filePath) + " and project " + PrintToString(projectPartId)
           )
{
    if (arg.filePath() != filePath) {
        *result_listener << "file path is " + PrintToString(arg.filePath()) + " and not " +  PrintToString(filePath);
        return false;
    }

    if (arg.projectPartId() != projectPartId) {
        *result_listener << "file path is " + PrintToString(arg.projectPartId()) + " and not " +  PrintToString(projectPartId);
        return false;
    }

    return true;
}

class TranslationUnits : public ::testing::Test
{
protected:
    void SetUp() override;

    ClangBackEnd::ProjectParts projects;
    ClangBackEnd::UnsavedFiles unsavedFiles;
    ClangBackEnd::TranslationUnits translationUnits = ClangBackEnd::TranslationUnits(projects, unsavedFiles);
    const Utf8String filePath = Utf8StringLiteral(TESTDATA_DIR"/complete_testfile_1.cpp");
    const Utf8String projectPartId = Utf8StringLiteral("/path/to/projectfile");

};

void TranslationUnits::SetUp()
{
    projects.createOrUpdate({ClangBackEnd::ProjectPartContainer(projectPartId)});
}


TEST_F(TranslationUnits, ThrowForGettingWithWrongFilePath)
{
    ASSERT_THROW(translationUnits.translationUnit(Utf8StringLiteral("foo.cpp"), projectPartId),
                 ClangBackEnd::TranslationUnitDoesNotExistException);

}

TEST_F(TranslationUnits, ThrowForGettingWithWrongProjectPartFilePath)
{
    ASSERT_THROW(translationUnits.translationUnit(filePath, Utf8StringLiteral("foo.pro")),
                 ClangBackEnd::ProjectPartDoNotExistException);

}

TEST_F(TranslationUnits, ThrowForAddingNonExistingFile)
{
    ClangBackEnd::FileContainer fileContainer(Utf8StringLiteral("foo.cpp"), projectPartId);

    ASSERT_THROW(translationUnits.createOrUpdate({fileContainer}),
                 ClangBackEnd::TranslationUnitFileNotExitsException);
}

TEST_F(TranslationUnits, DoNotThrowForAddingNonExistingFileWithUnsavedContent)
{
    ClangBackEnd::FileContainer fileContainer(Utf8StringLiteral("foo.cpp"), projectPartId, Utf8String(), true);

    ASSERT_NO_THROW(translationUnits.createOrUpdate({fileContainer}));
}

TEST_F(TranslationUnits, Add)
{
    ClangBackEnd::FileContainer fileContainer(filePath, projectPartId);

    translationUnits.createOrUpdate({fileContainer});

    ASSERT_THAT(translationUnits.translationUnit(filePath, projectPartId),
                IsTranslationUnit(filePath, projectPartId));
}

TEST_F(TranslationUnits, ThrowForRemovingWithWrongFilePath)
{
    ClangBackEnd::FileContainer fileContainer(Utf8StringLiteral("foo.cpp"), projectPartId);

    ASSERT_THROW(translationUnits.remove({fileContainer}),
                 ClangBackEnd::TranslationUnitDoesNotExistException);
}

TEST_F(TranslationUnits, ThrowForRemovingWithWrongProjectPartFilePath)
{
    ClangBackEnd::FileContainer fileContainer(filePath, Utf8StringLiteral("foo.pro"));

    ASSERT_THROW(translationUnits.remove({fileContainer}),
                 ClangBackEnd::ProjectPartDoNotExistException);
}

TEST_F(TranslationUnits, Remove)
{
    ClangBackEnd::FileContainer fileContainer(filePath, projectPartId);
    translationUnits.createOrUpdate({fileContainer});

    translationUnits.remove({fileContainer});

    ASSERT_THROW(translationUnits.translationUnit(filePath, projectPartId),
                 ClangBackEnd::TranslationUnitDoesNotExistException);
}

TEST_F(TranslationUnits, RemoveAllValidIfExceptionIsThrown)
{
    ClangBackEnd::FileContainer fileContainer(filePath, projectPartId);
    translationUnits.createOrUpdate({fileContainer});

    ASSERT_THROW(translationUnits.remove({ClangBackEnd::FileContainer(Utf8StringLiteral("dontextist.pro"), projectPartId), fileContainer}),
                 ClangBackEnd::TranslationUnitDoesNotExistException);

    ASSERT_THAT(translationUnits.translationUnits(),
                Not(Contains(TranslationUnit(filePath, unsavedFiles, projects.project(projectPartId)))));
}

}