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#include "googletest.h"

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

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

using ::testing::Eq;
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))
{
    return fileName == arg.filePath()
        && contents == arg.fileContent()
        && int(contentsLength) == arg.fileContent().byteSize();
}

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

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

    Utf8String absoluteFilePath = Utf8StringLiteral(TESTDATA_DIR"/file.cpp");

    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, CopyConstruct)
{
    ::UnsavedFile copyFrom(filePath, fileContent);

    ::UnsavedFile copyTo = copyFrom;

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

TEST_F(UnsavedFile, FilePath)
{
    ::UnsavedFile unsavedFile(absoluteFilePath, QStringLiteral(""));

    ASSERT_THAT(unsavedFile.filePath(), Eq(absoluteFilePath));
}

TEST_F(UnsavedFile, NativeFilePath)
{
    ::UnsavedFile unsavedFile(absoluteFilePath, QStringLiteral(""));
    const Utf8String nativeFilePath = FilePath::toNativeSeparators(absoluteFilePath);

    ASSERT_THAT(unsavedFile.nativeFilePath(), Eq(nativeFilePath));
}

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()));
}

TEST_F(UnsavedFile, ToUtf8PositionForValidLineColumn)
{
    ::UnsavedFile unsavedFile(filePath, fileContent);
    bool ok = false;

    const uint position = unsavedFile.toUtf8Position(1, 1, &ok);

    ASSERT_TRUE(ok);
    ASSERT_THAT(position, Eq(0L));
}

TEST_F(UnsavedFile, ToUtf8PositionForInValidLineColumn)
{
    ::UnsavedFile unsavedFile(filePath, fileContent);
    bool ok = false;

    unsavedFile.toUtf8Position(2, 1, &ok);

    ASSERT_FALSE(ok);
}

TEST_F(UnsavedFile, ToUtf8PositionForDefaultConstructedUnsavedFile)
{
    ::UnsavedFile unsavedFile;
    bool ok = false;

    unsavedFile.toUtf8Position(1, 1, &ok);

    ASSERT_FALSE(ok);
}

TEST_F(UnsavedFile, HasNoCharacterForDefaultConstructedUnsavedFile)
{
    ::UnsavedFile unsavedFile;

    ASSERT_FALSE(unsavedFile.hasCharacterAt(0, 'x'));
}

TEST_F(UnsavedFile, ReplacingInCopyDoesNotModifyOriginal)
{
    const Utf8String originalContent = Utf8StringLiteral("foo");
    ::UnsavedFile original(filePath, originalContent);
    ::UnsavedFile copy = original;

    const bool hasReplaced = copy.replaceAt(0, 3, aReplacement);

    ASSERT_TRUE(hasReplaced);
    ASSERT_THAT(original, IsUnsavedFile(filePath, originalContent, originalContent.byteSize()));
    ASSERT_THAT(copy, IsUnsavedFile(filePath, aReplacement, aReplacement.byteSize()));
}

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

    ASSERT_FALSE(unsavedFile.hasCharacterAt(100, 'x'));
}

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

    ASSERT_FALSE(unsavedFile.hasCharacterAt(0, 'x'));
}

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

    ASSERT_TRUE(unsavedFile.hasCharacterAt(0, 'c'));
}

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

    ASSERT_TRUE(unsavedFile.hasCharacterAt(1, 7, 't'));
}

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

    ASSERT_THAT(unsavedFile.lineRange(2, 1), Utf8String());
}

TEST_F(UnsavedFile, LineRangeForSingleLine)
{
    ::UnsavedFile unsavedFile(filePath, Utf8StringLiteral("foo"));

    ASSERT_THAT(unsavedFile.lineRange(1, 1), Utf8StringLiteral("foo"));
}

TEST_F(UnsavedFile, LineRangeForSingleLineInMultipleLines)
{
    ::UnsavedFile unsavedFile(filePath, Utf8StringLiteral("foo\nbar\n\baz"));

    ASSERT_THAT(unsavedFile.lineRange(2, 2), Utf8StringLiteral("bar"));
}

TEST_F(UnsavedFile, LineRangeForTwoLines)
{
    ::UnsavedFile unsavedFile(filePath, Utf8StringLiteral("foo\nbar\n\baz"));

    ASSERT_THAT(unsavedFile.lineRange(2, 3), Utf8StringLiteral("bar\n\baz"));
}

} // anonymous namespace