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** Copyright (C) 2016 The Qt Company Ltd.
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** General Public License version 3 as published by the Free Software
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#pragma once

#include <codecompletion.h>

#include <clang-c/Index.h>

#include <QVector>

#include <iosfwd>

namespace ClangBackEnd {

class UnsavedFile;

class CodeCompletionsExtractor
{
public:
    CodeCompletionsExtractor(const UnsavedFile &unsavedFile,
                             CXCodeCompleteResults *cxCodeCompleteResults);

    CodeCompletionsExtractor(CodeCompletionsExtractor&) = delete;
    CodeCompletionsExtractor &operator=(CodeCompletionsExtractor&) = delete;

    CodeCompletionsExtractor(CodeCompletionsExtractor&&) = delete;
    CodeCompletionsExtractor &operator=(CodeCompletionsExtractor&&) = delete;

    bool next();
    bool peek(const Utf8String &name);

    CodeCompletions extractAll(bool onlyFunctionOverloads);

    const CodeCompletion &currentCodeCompletion() const;

private:
    void extractCompletionKind();
    void extractText();
    void extractMethodCompletionKind();
    void extractMacroCompletionKind();
    void extractPriority();
    void extractAvailability();
    void extractHasParameters();
    void extractBriefComment();
    void extractCompletionChunks();
    void extractRequiredFixIts();

    void adaptPriority();
    void decreasePriorityForNonAvailableCompletions();
    void decreasePriorityForDestructors();
    void decreasePriorityForSignals();
    void decreasePriorityForQObjectInternals();
    void decreasePriorityForOperators();

    void handleCompletions(CodeCompletions &codeCompletions, bool onlyFunctionOverloads);

    bool hasText(const Utf8String &text, CXCompletionString cxCompletionString) const;

private:
    CodeCompletion currentCodeCompletion_;
    const UnsavedFile &unsavedFile;
    CXCompletionResult currentCxCodeCompleteResult{CXCursor_UnexposedDecl, nullptr};
    CXCodeCompleteResults *cxCodeCompleteResults = nullptr;
    uint cxCodeCompleteResultIndex = 0;
};

std::ostream &operator<<(std::ostream &os, const CodeCompletionsExtractor &extractor);
} // namespace ClangBackEnd
