#ifndef FREEFILESYNC_H_INCLUDED
#define FREEFILESYNC_H_INCLUDED

#include <wx/string.h>
#include <vector>
#include "shared/zstring.h"
#include "shared/systemConstants.h"
#include "shared/staticAssert.h"
#include <boost/shared_ptr.hpp>


namespace FreeFileSync
{
enum CompareVariant
{
    CMP_BY_TIME_SIZE,
    CMP_BY_CONTENT
};

wxString getVariantName(CompareVariant var);


enum SyncDirection
{
    SYNC_DIR_LEFT  = 0,
    SYNC_DIR_RIGHT,
    SYNC_DIR_NONE, //NOTE: align with SyncDirectionIntern before adding anything here!
};


class SyncConfiguration
{
public:
    SyncConfiguration() :
        automatic(true),
        exLeftSideOnly( SYNC_DIR_RIGHT),
        exRightSideOnly(SYNC_DIR_LEFT),
        leftNewer(      SYNC_DIR_RIGHT),
        rightNewer(     SYNC_DIR_LEFT),
        different(      SYNC_DIR_NONE),
        conflict(       SYNC_DIR_NONE) {}

    bool operator==(const SyncConfiguration& other) const
    {
        return exLeftSideOnly  == other.exLeftSideOnly  &&
               exRightSideOnly == other.exRightSideOnly &&
               leftNewer       == other.leftNewer       &&
               rightNewer      == other.rightNewer      &&
               different       == other.different       &&
               conflict        == other.conflict;
    }

    //get/set default configuration variants
    enum Variant
    {
        AUTOMATIC,
        MIRROR,
        UPDATE,
        TWOWAY,
        CUSTOM
    };
    Variant getVariant() const;
    void setVariant(const Variant var);

    bool automatic; //use sync-database
    SyncDirection exLeftSideOnly;
    SyncDirection exRightSideOnly;
    SyncDirection leftNewer;
    SyncDirection rightNewer;
    SyncDirection different;
    SyncDirection conflict;
};


enum DeletionPolicy
{
    DELETE_PERMANENTLY = 5,
    MOVE_TO_RECYCLE_BIN,
    MOVE_TO_CUSTOM_DIRECTORY
};


struct HiddenSettings
{
    HiddenSettings() :
        fileTimeTolerance(2),  //default 2s: FAT vs NTFS
        traverseDirectorySymlinks(false),
        copyFileSymlinks(true),
        verifyFileCopy(false) {}

    unsigned int fileTimeTolerance; //max. allowed file time deviation
    bool traverseDirectorySymlinks;
    bool copyFileSymlinks; //copy symbolic link instead of target file
    bool verifyFileCopy;   //verify copied files

    bool operator==(const HiddenSettings& other) const
    {
        return fileTimeTolerance         == other.fileTimeTolerance         &&
               traverseDirectorySymlinks == other.traverseDirectorySymlinks &&
               copyFileSymlinks          == other.copyFileSymlinks          &&
               verifyFileCopy            == other.verifyFileCopy;
    }
};


bool recycleBinExistsWrap();


struct AlternateSyncConfig
{
    AlternateSyncConfig(const SyncConfiguration& syncCfg,
                        const DeletionPolicy     handleDel,
                        const wxString&          customDelDir) :
        syncConfiguration(syncCfg),
        handleDeletion(handleDel),
        customDeletionDirectory(customDelDir) {};

    AlternateSyncConfig() :  //construct with default values
        handleDeletion(FreeFileSync::recycleBinExistsWrap() ? MOVE_TO_RECYCLE_BIN : DELETE_PERMANENTLY) {} //enable if OS supports it; else user will have to activate first and then get an error message

    //Synchronisation settings
    SyncConfiguration syncConfiguration;

    //misc options
    DeletionPolicy handleDeletion; //use Recycle, delete permanently or move to user-defined location
    wxString customDeletionDirectory;

    bool operator==(const AlternateSyncConfig& other) const
    {
        return syncConfiguration       == other.syncConfiguration &&
               handleDeletion          == other.handleDeletion    &&
               customDeletionDirectory == other.customDeletionDirectory;
    }
};

//standard filter settings, OS dependent
Zstring defaultIncludeFilter();
Zstring defaultExcludeFilter();


struct AlternateFilter
{
    AlternateFilter(const Zstring& include, const Zstring& exclude) :
        includeFilter(include),
        excludeFilter(exclude) {}

    AlternateFilter() : //construct with default values
        includeFilter(defaultIncludeFilter()),
        excludeFilter(defaultExcludeFilter()) {}

    Zstring includeFilter;
    Zstring excludeFilter;

    bool operator==(const AlternateFilter& other) const
    {
        return includeFilter == other.includeFilter &&
               excludeFilter == other.excludeFilter;
    }
};


struct FolderPair
{
    FolderPair(const Zstring& leftDir, const Zstring& rightDir) :
        leftDirectory(leftDir),
        rightDirectory(rightDir) {}

    Zstring leftDirectory;
    Zstring rightDirectory;

    bool operator==(const FolderPair& other) const
    {
        return leftDirectory  == other.leftDirectory &&
               rightDirectory == other.rightDirectory;
    }
};


struct FolderPairEnh //enhanced folder pairs with (optional) alternate configuration
{
    FolderPairEnh() {}

    FolderPairEnh(const Zstring& leftDir,
                  const Zstring& rightDir,
                  const boost::shared_ptr<const AlternateSyncConfig>& syncConfig,
                  const boost::shared_ptr<const AlternateFilter>& filter) :
        leftDirectory(leftDir),
        rightDirectory(rightDir) ,
        altSyncConfig(syncConfig),
        altFilter(filter) {}

    Zstring leftDirectory;
    Zstring rightDirectory;

    boost::shared_ptr<const AlternateSyncConfig> altSyncConfig; //optional
    boost::shared_ptr<const AlternateFilter> altFilter;         //optional

    bool operator==(const FolderPairEnh& other) const
    {
        return leftDirectory  == other.leftDirectory  &&
               rightDirectory == other.rightDirectory &&

               (altSyncConfig.get() && other.altSyncConfig.get() ?
                *altSyncConfig == *other.altSyncConfig :
                altSyncConfig.get() == other.altSyncConfig.get()) &&

               (altFilter.get() && other.altFilter.get() ?
                *altFilter == *other.altFilter :
                altFilter.get() == other.altFilter.get());
    }
};


struct MainConfiguration
{
    MainConfiguration() :
        mainFolderPair(Zstring(), Zstring()),
        compareVar(CMP_BY_TIME_SIZE),
#ifdef FFS_WIN
        filterIsActive(true),
#elif defined FFS_LINUX
        filterIsActive(false),
#endif
        includeFilter(defaultIncludeFilter()),
        excludeFilter(defaultExcludeFilter()),
        handleDeletion(FreeFileSync::recycleBinExistsWrap() ? MOVE_TO_RECYCLE_BIN : DELETE_PERMANENTLY) {} //enable if OS supports it; else user will have to activate first and then get an error message

    FolderPair mainFolderPair;
    std::vector<FolderPairEnh> additionalPairs;

    //Compare setting
    CompareVariant compareVar;

    //Synchronisation settings
    SyncConfiguration syncConfiguration;

    //Filter setting
    bool filterIsActive;
    Zstring includeFilter;
    Zstring excludeFilter;

    //misc options
    HiddenSettings hidden; //settings not visible on GUI

    DeletionPolicy handleDeletion; //use Recycle, delete permanently or move to user-defined location
    wxString customDeletionDirectory;

    wxString getSyncVariantName();

    bool operator==(const MainConfiguration& other) const
    {
        return mainFolderPair    == other.mainFolderPair    &&
               additionalPairs   == other.additionalPairs   &&
               compareVar        == other.compareVar        &&
               syncConfiguration == other.syncConfiguration &&
               filterIsActive    == other.filterIsActive    &&
               includeFilter     == other.includeFilter     &&
               excludeFilter     == other.excludeFilter     &&
               hidden            == other.hidden            &&
               handleDeletion    == other.handleDeletion    &&
               customDeletionDirectory == other.customDeletionDirectory;
    }
};


enum CompareFilesResult
{
    FILE_LEFT_SIDE_ONLY = 0,
    FILE_RIGHT_SIDE_ONLY,
    FILE_LEFT_NEWER,
    FILE_RIGHT_NEWER,
    FILE_DIFFERENT,
    FILE_EQUAL,
    FILE_CONFLICT
};
//attention make sure these /|\  \|/ two enums match!!!
enum CompareDirResult
{
    DIR_LEFT_SIDE_ONLY  = FILE_LEFT_SIDE_ONLY,
    DIR_RIGHT_SIDE_ONLY = FILE_RIGHT_SIDE_ONLY,
    DIR_EQUAL           = FILE_EQUAL
};


inline
CompareFilesResult convertToFilesResult(CompareDirResult value)
{
    return static_cast<CompareFilesResult>(value);
}



wxString getDescription(CompareFilesResult cmpRes);
wxString getSymbol(CompareFilesResult cmpRes);


enum SyncOperation
{
    SO_CREATE_NEW_LEFT,
    SO_CREATE_NEW_RIGHT,
    SO_DELETE_LEFT,
    SO_DELETE_RIGHT,
    SO_OVERWRITE_LEFT,
    SO_OVERWRITE_RIGHT,
    SO_DO_NOTHING,
    SO_UNRESOLVED_CONFLICT
};

wxString getDescription(SyncOperation op);
wxString getSymbol(SyncOperation op);


//Exception class used to abort the "compare" and "sync" process
class AbortThisProcess {};
}

#endif // FREEFILESYNC_H_INCLUDED