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#include "googletest.h"

#include <filepathcaching.h>
#include <modifiedtimechecker.h>
#include <refactoringdatabaseinitializer.h>

namespace {

using ClangBackEnd::SourceEntries;
using ClangBackEnd::SourceType;
using ClangBackEnd::FilePathView;


class ModifiedTimeChecker : public testing::Test
{
protected:

    ClangBackEnd::FilePathId id(const Utils::SmallStringView &path) const
    {
        return filePathCache.filePathId(ClangBackEnd::FilePathView{path});
    }


    ModifiedTimeChecker()
    {
        ON_CALL(getModifiedTimeCallback, Call(Eq(FilePathView("/path1")))).WillByDefault(Return(50));
        ON_CALL(getModifiedTimeCallback, Call(Eq(FilePathView("/path2")))).WillByDefault(Return(30));
    }
    NiceMock<MockFunction<ClangBackEnd::TimeStamp(ClangBackEnd::FilePathView filePath)>> getModifiedTimeCallback;
    Sqlite::Database database{":memory:", Sqlite::JournalMode::Memory};
    ClangBackEnd::RefactoringDatabaseInitializer<Sqlite::Database> databaseInitializer{database};
    ClangBackEnd::FilePathCaching filePathCache{database};
    decltype(getModifiedTimeCallback.AsStdFunction()) callback = getModifiedTimeCallback
                                                                     .AsStdFunction();
    ClangBackEnd::ModifiedTimeChecker<> checker{callback, filePathCache};
    SourceEntries upToDateEntries = {{id("/path1"), SourceType::UserInclude, 100},
                                     {id("/path2"), SourceType::SystemInclude, 30}};
    SourceEntries notUpToDateEntries = {{id("/path1"), SourceType::UserInclude, 50},
                                        {id("/path2"), SourceType::SystemInclude, 20}};
};

TEST_F(ModifiedTimeChecker, IsUpToDate)
{
    auto isUpToDate = checker.isUpToDate(upToDateEntries);

    ASSERT_TRUE(isUpToDate);
}

TEST_F(ModifiedTimeChecker, IsNotUpToDateIfSourceEntriesAreEmpty)
{
    auto isUpToDate = checker.isUpToDate({});

    ASSERT_FALSE(isUpToDate);
}

TEST_F(ModifiedTimeChecker, IsNotUpToDate)
{
    auto isUpToDate = checker.isUpToDate({});

    ASSERT_FALSE(isUpToDate);
}

TEST_F(ModifiedTimeChecker, PathChangesUpdatesTimeStamps)
{
    checker.isUpToDate(upToDateEntries);

    EXPECT_CALL(getModifiedTimeCallback, Call(Eq(FilePathView("/path1"))));
    EXPECT_CALL(getModifiedTimeCallback, Call(Eq(FilePathView("/path2"))));

    checker.pathsChanged({id(FilePathView("/path1")), id(FilePathView("/path2")), id(FilePathView("/path3"))});
}

TEST_F(ModifiedTimeChecker, IsNotUpToDateAnyMoreAfterUpdating)
{
    checker.isUpToDate(upToDateEntries);
    ON_CALL(getModifiedTimeCallback, Call(Eq(FilePathView("/path1")))).WillByDefault(Return(120));
    ON_CALL(getModifiedTimeCallback, Call(Eq(FilePathView("/path2")))).WillByDefault(Return(30));

    checker.pathsChanged({id(FilePathView("/path1")), id(FilePathView("/path2")), id(FilePathView("/path3"))});

    ASSERT_FALSE(checker.isUpToDate(upToDateEntries));
}

} // namespace