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#ifndef LIB7Z_FACADE_H
#define LIB7Z_FACADE_H

#include "installer_global.h"

#include <QDateTime>
#include <QFile>
#include <QPoint>
#include <QString>
#include <QVariant>
#include <QVector>

#include "Common/MyWindows.h"

#include <stdexcept>
#include <string>

QT_BEGIN_NAMESPACE
class QStringList;
template <typename T> class QVector;
QT_END_NAMESPACE

namespace Lib7z {
    class INSTALLER_EXPORT SevenZipException : public std::runtime_error {
    public:
        explicit SevenZipException( const QString& msg ) : std::runtime_error( msg.toStdString() ), m_message( msg ) {}
        explicit SevenZipException( const char* msg ) : std::runtime_error( msg ), m_message( QString::fromLocal8Bit( msg ) ) {}
        explicit SevenZipException( const std::string& msg ) : std::runtime_error( msg ), m_message( QString::fromLocal8Bit( msg.c_str() ) ) {}

        ~SevenZipException() throw() {}
        QString message() const { return m_message; }
    private:
        QString m_message;
    };

    class INSTALLER_EXPORT File
    {
    public:
        File();
        QVector<File> subtreeInPreorder() const;

        bool operator<(const File &other) const;
        bool operator==(const File &other) const;

        QFile::Permissions permissions;
        QString path;
        QDateTime mtime;
        quint64 uncompressedSize;
        quint64 compressedSize;
        bool isDirectory;
        QVector<File> children;
        QPoint archiveIndex;
    };

    class ExtractCallbackPrivate;
    class ExtractCallbackImpl;

    class ExtractCallback
    {
        friend class ::Lib7z::ExtractCallbackImpl;
    public:
        ExtractCallback();
        virtual ~ExtractCallback();

        void setTarget(QFileDevice *archive);
        void setTarget(const QString &dir);

    protected:
        /*!
            Reimplement to prepare for file @p filename to be extracted, e.g. by renaming existing
            files. @return @p true if the preparation was successful and extraction can be continued.
            If @p false is returned, the extraction will be aborted. Default implementation returns
            @p true.
        */
        virtual bool prepareForFile(const QString &filename);
        virtual void setCurrentFile(const QString &filename);
        virtual HRESULT setCompleted(quint64 completed, quint64 total);

    public: //for internal use
        const ExtractCallbackImpl *impl() const;
        ExtractCallbackImpl *impl();

    private:
        ExtractCallbackPrivate *const d;
    };

    class UpdateCallbackPrivate;
    class UpdateCallbackImpl;

    class UpdateCallback
    {
        friend class ::Lib7z::UpdateCallbackImpl;
    public:
        UpdateCallback();
        virtual ~UpdateCallback();

        void setTarget(QFileDevice *archive);
        void setSourcePaths(const QStringList &paths);

        virtual UpdateCallbackImpl *impl();

    private:
        UpdateCallbackPrivate *const d;
    };

    class OpenArchiveInfoCleaner : public QObject
    {
        Q_OBJECT
    public:
        OpenArchiveInfoCleaner()
        {}

    private Q_SLOTS :
        void deviceDestroyed(QObject*);
    };

    /*!
        Extracts the given File \a file from \a archive into output device \a out using the
        provided extract callback \a callback.

        Throws Lib7z::SevenZipException on error.
    */
    void INSTALLER_EXPORT extractFileFromArchive(QFileDevice *archive, const File &item,
        QFileDevice *out, ExtractCallback *callback = 0);

    /*!
        Extracts the given File \a file from \a archive into target directory \a targetDirectory
        using the provided extract callback \a callback. The output filename is deduced from the
        \a file path name.

        Throws Lib7z::SevenZipException on error.
    */
    void INSTALLER_EXPORT extractFileFromArchive(QFileDevice *archive, const File &item,
        const QString &targetDirectory, ExtractCallback *callback = 0);

    /*!
        Extracts the given \a archive content into target directory \a targetDirectory using the
        provided extract callback \a callback. The output filenames are deduced from the \a archive
        content.

        Throws Lib7z::SevenZipException on error.
    */
    void INSTALLER_EXPORT extractArchive(QFileDevice *archive, const QString &targetDirectory,
        ExtractCallback *callback = 0);

    /*
        @thows Lib7z::SevenZipException
    */
    void INSTALLER_EXPORT createArchive(QFileDevice *archive, const QStringList &sourcePaths,
        UpdateCallback *callback = 0);

    /*!
        @thows Lib7z::SevenZipException
    */
    QVector<File> INSTALLER_EXPORT listArchive(QFileDevice *archive);

    /*!
        @throws Lib7z::SevenZipException
    */
    bool INSTALLER_EXPORT isSupportedArchive(QFileDevice *archive);

    /*!
        @throws Lib7z::SevenZipException
    */
    bool INSTALLER_EXPORT isSupportedArchive(const QString &archive);
}

#endif // LIB7Z_FACADE_H