// **************************************************************************
// * This file is part of the FreeFileSync project. It is distributed under *
// * GNU General Public License: http://www.gnu.org/licenses/gpl.html       *
// * Copyright (C) 2008-2011 ZenJu (zhnmju123 AT gmx.de)                    *
// **************************************************************************

#ifndef GRIDVIEW_H_INCLUDED
#define GRIDVIEW_H_INCLUDED

#include <set>
#include "../file_hierarchy.h"


namespace zen
{
//gui view of FolderComparison
class GridView
{
public:
    //direct data access via row number
    const FileSystemObject* getObject(size_t row) const;  //returns NULL if object is not found; logarithmic complexity
    FileSystemObject* getObject(size_t row);              //
    size_t rowsOnView() const; //only the currently visible elements
    size_t rowsTotal() const;  //total number of rows available

    //get references to FileSystemObject: no NULL-check needed! Everything's bound.
    void getAllFileRef(const std::set<size_t>& guiRows, std::vector<FileSystemObject*>& output);

    struct StatusCmpResult
    {
        StatusCmpResult();

        bool existsLeftOnly;
        bool existsRightOnly;
        bool existsLeftNewer;
        bool existsRightNewer;
        bool existsDifferent;
        bool existsEqual;
        bool existsConflict;

        unsigned int filesOnLeftView;
        unsigned int foldersOnLeftView;
        unsigned int filesOnRightView;
        unsigned int foldersOnRightView;

        zen::UInt64 filesizeLeftView;
        zen::UInt64 filesizeRightView;
    };

    //comparison results view
    StatusCmpResult updateCmpResult(bool hideFiltered,
                                    bool leftOnlyFilesActive,
                                    bool rightOnlyFilesActive,
                                    bool leftNewerFilesActive,
                                    bool rightNewerFilesActive,
                                    bool differentFilesActive,
                                    bool equalFilesActive,
                                    bool conflictFilesActive);

    struct StatusSyncPreview
    {
        StatusSyncPreview();

        bool existsSyncCreateLeft;
        bool existsSyncCreateRight;
        bool existsSyncDeleteLeft;
        bool existsSyncDeleteRight;
        bool existsSyncDirLeft;
        bool existsSyncDirRight;
        bool existsSyncDirNone;
        bool existsSyncEqual;
        bool existsConflict;

        unsigned int filesOnLeftView;
        unsigned int foldersOnLeftView;
        unsigned int filesOnRightView;
        unsigned int foldersOnRightView;

        zen::UInt64 filesizeLeftView;
        zen::UInt64 filesizeRightView;
    };

    //synchronization preview
    StatusSyncPreview updateSyncPreview(bool hideFiltered,
                                        bool syncCreateLeftActive,
                                        bool syncCreateRightActive,
                                        bool syncDeleteLeftActive,
                                        bool syncDeleteRightActive,
                                        bool syncDirOverwLeftActive,
                                        bool syncDirOverwRightActive,
                                        bool syncDirNoneActive,
                                        bool syncEqualActive,
                                        bool conflictFilesActive);



    FolderComparison& getDataTentative();    //get data for operation that does NOT add or reorder rows! (deletion is okay)
    void setData(FolderComparison& newData); //set data, taking ownership: warning std::swap() is used!!!
    void removeInvalidRows();                 //remove rows that have been deleted meanwhile: call after manual deletion and synchronization!
    void clearAllRows();                      //clears everything

    //sorting...
    enum SortType
    {
        SORT_BY_REL_NAME,
        SORT_BY_FILENAME,
        SORT_BY_FILESIZE,
        SORT_BY_DATE,
        SORT_BY_EXTENSION,
        SORT_BY_CMP_RESULT,
        SORT_BY_DIRECTORY,
        SORT_BY_SYNC_DIRECTION
    };

    bool static getDefaultDirection(SortType type); //true: ascending; false: descending

    void sortView(SortType type, bool onLeft, bool ascending); //always call this method for sorting, never sort externally!

private:
    class SerializeHierarchy;

    struct RefIndex
    {
        RefIndex(size_t folderInd, FileSystemObject::ObjectID id) :
            folderIndex(folderInd),
            objId(id) {}
        size_t folderIndex;
        FileSystemObject::ObjectID objId;
    };

    std::vector<FileSystemObject::ObjectID> viewRef;  //partial view on sortedRef
    //              |
    //              | (update...)
    //             \|/
    std::vector<RefIndex> sortedRef; //equivalent to folderCmp, but may be sorted
    //              |
    //              | (setData)
    //             \|/
    FolderComparison folderCmp; //actual comparison data: owned by GridView!


    //sorting classes
    template <bool ascending>
    class LessRelativeName;

    template <bool ascending, SelectedSide side>
    class LessShortFileName;

    template <bool ascending, SelectedSide side>
    class LessFilesize;

    template <bool ascending, SelectedSide side>
    class LessFiletime;

    template <bool ascending, SelectedSide side>
    class LessExtension;

    template <bool ascending>
    class LessCmpResult;

    template <bool ascending>
    class LessSyncDirection;
};










//############################################################################
//inline implementation

inline
const FileSystemObject* GridView::getObject(size_t row) const
{
    if (row < rowsOnView())
        return FileSystemObject::retrieve(viewRef[row]);
    else
        return NULL;
}

inline
FileSystemObject* GridView::getObject(size_t row)
{
    //code re-use of const method: see Meyers Effective C++
    return const_cast<FileSystemObject*>(static_cast<const GridView&>(*this).getObject(row));
}


inline
size_t GridView::rowsOnView() const
{
    return viewRef.size();
}


inline
FolderComparison& GridView::getDataTentative()
{
    return folderCmp;
}

inline
size_t GridView::rowsTotal() const //total number of rows available
{
    return sortedRef.size();
}
}


#endif // GRIDVIEW_H_INCLUDED