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

#include <unsavedfile.h>
#include <unsavedfiles.h>

using ClangBackEnd::UnsavedFile;
using ClangBackEnd::UnsavedFiles;

using ::testing::PrintToString;

namespace {

MATCHER_P3(IsUnsavedFile, fileName, contents, contentsLength,
          std::string(negation ? "isn't" : "is")
          + " file name " + PrintToString(fileName)
          + ", contents " + PrintToString(contents)
          + ", contents length " + PrintToString(contentsLength))
{
    CXUnsavedFile unsavedFile = arg.cxUnsavedFile;

    return fileName == unsavedFile.Filename
        && contents == unsavedFile.Contents
        && size_t(contentsLength) == unsavedFile.Length;
}

class UnsavedFile : public ::testing::Test
{
protected:
    Utf8String filePath = Utf8StringLiteral("path");
    Utf8String fileContent = Utf8StringLiteral("content");

    Utf8String otherFilePath = Utf8StringLiteral("otherpath");
    Utf8String otherFileContent = Utf8StringLiteral("othercontent");

    uint aLength = 2;
    Utf8String aReplacement = Utf8StringLiteral("replacement");
};

TEST_F(UnsavedFile, Create)
{
    ::UnsavedFile unsavedFile(filePath, fileContent);

    ASSERT_THAT(unsavedFile, IsUnsavedFile(filePath,
                                           fileContent,
                                           fileContent.byteSize()));
}

TEST_F(UnsavedFile, Destruct)
{
    auto *unsavedFile = new ::UnsavedFile(filePath, fileContent);
    unsavedFile->~UnsavedFile();

    ASSERT_THAT(*unsavedFile, IsUnsavedFile(nullptr, nullptr, 0UL));
}

TEST_F(UnsavedFile, ConstructMoveToIsValid)
{
    ::UnsavedFile movedFrom(filePath, fileContent);

    ::UnsavedFile movedTo = std::move(movedFrom);

    ASSERT_THAT(movedTo, IsUnsavedFile(filePath,
                                       fileContent,
                                       fileContent.byteSize()));
}

TEST_F(UnsavedFile, ConstructMoveFromIsNull)
{
    ::UnsavedFile movedFrom(filePath, fileContent);

    ::UnsavedFile movedTo = std::move(movedFrom);

    ASSERT_THAT(movedFrom, IsUnsavedFile(nullptr, nullptr, 0UL));
}

TEST_F(UnsavedFile, AssignMoveToIsValid)
{
    ::UnsavedFile movedFrom(filePath, fileContent);
    ::UnsavedFile movedTo(otherFilePath, otherFileContent);

    movedTo = std::move(movedFrom);

    ASSERT_THAT(movedTo, IsUnsavedFile(filePath,
                                       fileContent,
                                       fileContent.byteSize()));
}

TEST_F(UnsavedFile, AssignMoveFromIsSwapped)
{
    ::UnsavedFile movedFrom(filePath, fileContent);
    ::UnsavedFile movedTo(otherFilePath, otherFileContent);

    movedTo = std::move(movedFrom);

    ASSERT_THAT(movedFrom, IsUnsavedFile(otherFilePath,
                                         otherFileContent,
                                         otherFileContent.byteSize()));
}

TEST_F(UnsavedFile, DoNotReplaceWithOffsetZeroInEmptyContent)
{
    ::UnsavedFile unsavedFile(filePath, QStringLiteral(""));

    ASSERT_FALSE(unsavedFile.replaceAt(0, aLength, aReplacement));
}

TEST_F(UnsavedFile, DoNotReplaceWithOffsetOneInEmptyContent)
{
    ::UnsavedFile unsavedFile(filePath, QStringLiteral(""));

    ASSERT_FALSE(unsavedFile.replaceAt(1, aLength, aReplacement));
}

TEST_F(UnsavedFile, Replace)
{
    const Utf8String expectedContent = Utf8StringLiteral("hello replacement!");
    ::UnsavedFile unsavedFile(filePath, Utf8StringLiteral("hello world!"));

    const bool hasReplaced = unsavedFile.replaceAt(6, 5, aReplacement);

    ASSERT_TRUE(hasReplaced);
    ASSERT_THAT(unsavedFile, IsUnsavedFile(filePath, expectedContent, expectedContent.byteSize()));
}

} // anonymous namespace