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#include "googletest.h"

#include <clangformat/clangformatbaseindenter.h>
#include <utils/fileutils.h>

#include <QTextDocument>

namespace TextEditor {
class TabSettings
{
};
}

namespace {

class ClangFormatIndenter : public ClangFormat::ClangFormatBaseIndenter
{
public:
    ClangFormatIndenter(QTextDocument *doc)
        : ClangFormat::ClangFormatBaseIndenter(doc)
    {}

    Utils::optional<TextEditor::TabSettings> tabSettings() const override
    {
        return Utils::optional<TextEditor::TabSettings>();
    }
};

class ClangFormat : public ::testing::Test
{
protected:
    void SetUp() final
    {
        indenter.setFileName(Utils::FileName::fromString(TESTDATA_DIR"/test.cpp"));
    }

    void insertLines(const std::vector<QString> &lines)
    {
        cursor.setPosition(0);
        for (size_t lineNumber = 1; lineNumber <= lines.size(); ++lineNumber) {
            if (lineNumber > 1)
                cursor.insertBlock();

            cursor.insertText(lines[lineNumber - 1]);
        }
        cursor.setPosition(0);
        cursor.movePosition(QTextCursor::End, QTextCursor::KeepAnchor);
    }

    std::vector<QString> documentLines()
    {
        std::vector<QString> result;
        const int lines = doc.blockCount();
        result.reserve(static_cast<size_t>(lines));
        for (int line = 0; line < lines; ++line)
            result.push_back(doc.findBlockByNumber(line).text());

        return result;
    }

    QTextDocument doc;
    ClangFormatIndenter indenter{&doc};
    QTextCursor cursor{&doc};
};

TEST_F(ClangFormat, SimpleIndent)
{
    insertLines({"int main()",
                 "{",
                 "int a;",
                 "}"});

    indenter.indent(cursor, QChar::Null, TextEditor::TabSettings());

    ASSERT_THAT(documentLines(), ElementsAre("int main()",
                                             "{",
                                             "    int a;",
                                             "}"));
}

}