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**
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** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
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** Alternatively, this file may be used under the terms of the GNU Lesser
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** General Public License version 2.1 or version 3 as published by the Free
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****************************************************************************/
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#ifndef SYMBOLFINDER_H
#define SYMBOLFINDER_H

#include "cpptools_global.h"

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#include <cplusplus/CppDocument.h>
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#include <QHash>
#include <QStringList>
#include <QMultiMap>
#include <QSet>
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namespace CppTools {

class CPPTOOLS_EXPORT SymbolFinder
{
public:
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    SymbolFinder();
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    CPlusPlus::Function *findMatchingDefinition(CPlusPlus::Symbol *symbol,
                                                const CPlusPlus::Snapshot &snapshot,
                                                bool strict = false);
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    CPlusPlus::Class *findMatchingClassDeclaration(CPlusPlus::Symbol *declaration,
                                                   const CPlusPlus::Snapshot &snapshot);

    void findMatchingDeclaration(const CPlusPlus::LookupContext &context,
                                 CPlusPlus::Function *functionType,
                                 QList<CPlusPlus::Declaration *> *typeMatch,
                                 QList<CPlusPlus::Declaration *> *argumentCountMatch,
                                 QList<CPlusPlus::Declaration *> *nameMatch);

    QList<CPlusPlus::Declaration *> findMatchingDeclaration(const CPlusPlus::LookupContext &context,
                                                            CPlusPlus::Function *functionType);

private:
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    QStringList fileIterationOrder(const QString &referenceFile,
                                   const CPlusPlus::Snapshot &snapshot);
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    void checkCacheConsistency(const QString &referenceFile, const CPlusPlus::Snapshot &snapshot);
    void clearCache(const QString &referenceFile, const QString &comparingFile);
    void insertCache(const QString &referenceFile, const QString &comparingFile);

    void trackCacheUse(const QString &referenceFile);
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    static int computeKey(const QString &referenceFile, const QString &comparingFile);

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    QHash<QString, QMultiMap<int, QString> > m_filePriorityCache;
    QHash<QString, QSet<QString> > m_fileMetaCache;
    QStringList m_recent;
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};

} // namespace CppTools

#endif // SYMBOLFINDER_H