/*==LICENSE==*

CyanWorlds.com Engine - MMOG client, server and tools
Copyright (C) 2011  Cyan Worlds, Inc.

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program.  If not, see <http://www.gnu.org/licenses/>.

Additional permissions under GNU GPL version 3 section 7

If you modify this Program, or any covered work, by linking or
combining it with any of RAD Game Tools Bink SDK, Autodesk 3ds Max SDK,
NVIDIA PhysX SDK, Microsoft DirectX SDK, OpenSSL library, Independent
JPEG Group JPEG library, Microsoft Windows Media SDK, or Apple QuickTime SDK
(or a modified version of those libraries),
containing parts covered by the terms of the Bink SDK EULA, 3ds Max EULA,
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You can contact Cyan Worlds, Inc. by email legal@cyan.com
 or by snail mail at:
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*==LICENSE==*/
//////////////////////////////////////////////////////////////////////////////
//
//  plDatMerger - Command line utility app that takes multiple dat files
//                and merges them into one
//
//////////////////////////////////////////////////////////////////////////////

#include "hsTypes.h"
#include "hsStream.h"
#include "hsUtils.h"
#include "hsTimer.h"
#include "../plFile/hsFiles.h"
#include "plRawResManager.h"
#include "plRawPageAccessor.h"
#include "../plResMgr/plRegistryDiskSource.h"
#include "../plResMgr/plRegistryDiskMergedSourceData.h"
#include "../plResMgr/plRegistryHelpers.h"
#include "../plResMgr/plRegistry.h"
#include "../plResMgr/plRegistryNode.h"
#include "../plResMgr/plResMgrSettings.h"
#include "../plResMgr/plPageInfo.h"
#include "../plAgeDescription/plAgeDescription.h"
#include "../plFile/hsFiles.h"
#include "../plFile/plFileUtils.h"
#include "../pnKeyedObject/plKey.h"

#include <stdio.h>
#include <stdlib.h>

//// Tiny String Filter Class ////////////////////////////////////////////////

class plStrFilter
{
    protected:

        hsBool  fWildCardSuffix, fInvert;
        char    *fStr;

        plStrFilter *fChapFilter, *fPageFilter;


        hsBool  IPass( const char *string )
        {
            if( fWildCardSuffix )
            {
                if( strnicmp( fStr, string, strlen( fStr ) ) == 0 )
                    return true;
            }
            else
            {
                if( stricmp( fStr, string ) == 0 )
                    return true;
            }
            return false;
        }

    public:
        plStrFilter() { fWildCardSuffix = fInvert = false; fStr = nil; fChapFilter = fPageFilter = nil; }

        plStrFilter( const char *initLine )
        {
            if( initLine[ 0 ] == '-' )
            {
                fInvert = true;
                initLine++;
            }
            else if( initLine[ 0 ] == '+' )
            {
                initLine++;
                fInvert = false;
            }
            else
                fInvert = false;

            fWildCardSuffix = false;
            fStr = hsStrcpy( initLine );

            fChapFilter = fPageFilter = nil;
            char *comma = strchr( fStr, ',' );
            if( comma != nil )
            {
                char *next = comma + 1;
                *comma = 0;
                comma = strchr( next, ',' );
                if( comma != nil )
                {
                    fPageFilter = new plStrFilter( comma + 1 );
                    *comma = 0;
                }

                fChapFilter = new plStrFilter( next );
            }

            if( fStr[ strlen( fStr ) - 1 ] == '*' )
            {
                fWildCardSuffix = true;
                fStr[ strlen( fStr ) - 1 ] = 0;
            }
        }

        ~plStrFilter()
        {
            delete [] fStr;
            delete fChapFilter;
            delete fPageFilter;
        }

        hsBool  Pass( const char *string )
        {
            hsBool ret = IPass( string );

            if( fInvert )
                ret = !ret;

            return ret;
        }

        hsBool  Pass( const plPageInfo &page )
        {
            hsBool  ret = IPass( page.GetAge() ) &&
                            fChapFilter->IPass( page.GetChapter() ) &&
                                fPageFilter->IPass( page.GetPage() );
            if( fInvert )
                ret = !ret;

            return ret;
        }

        static hsBool   Passes( const char *string, hsTArray<plStrFilter *> &filters )
        {
            uint32_t  i;


            for( i = 0; i < filters.GetCount(); i++ )
            {
                if( !filters[ i ]->Pass( string ) )
                    return false;
            }

            return true;
        }

        static hsBool   Passes( const plPageInfo &page, hsTArray<plStrFilter *> &filters )
        {
            uint32_t  i;


            for( i = 0; i < filters.GetCount(); i++ )
            {
                if( !filters[ i ]->Pass( page ) )
                    return false;
            }

            return true;
        }
};

//// Globals /////////////////////////////////////////////////////////////////

plRawResManager *gResManager = nil;

char        gDatDirectory[ kFolderIterator_MaxPath ] = ".";
char        gDestFileName[ kFolderIterator_MaxPath ];

hsTArray<plStrFilter *> fPageFilters;
hsTArray<plStrFilter *> *fCurrFilterList = nil;

hsTArray<plRegistryPageNode *>  fSourcePages;

plRegistryDiskMergedSourceData *gDestMergeData = nil;


//// PrintHelp ///////////////////////////////////////////////////////////////

int PrintHelp( void )
{
    puts( "" );
    puts( "Usage:\tplDatMerger [oldDir] [newDir] [patchDir] |-na| |-np| |-fp| |-lAgeName| |-anewAgeDir|" );
    puts( "Where:" );
    puts( "\toldDir is the directory containing the old data files" );
    puts( "\tnewDir is the directory containing the new data files" );
    puts( "\tpatchDir is the directory where the patch files will go" );
    puts( "\t                   WARNING: This should point to a 'patches'" );
    puts( "\t                   subdir under 'newDir'; don't use anything else" );
    puts( "\t                   unless you REALLY know what you're doing." );
    puts( "\t-na is a flag that keeps the builder from updating the" );
    puts( "\t                   version numbers in the age files (for generating" );
    puts( "\t                   previous patch versions, for example." );
    puts( "\t-np is a flag that keeps the builder from actually creating the" );
    puts( "\t                   patch files. Usually helpful when you want to" );
    puts( "\t                   only update version numbers in the dat files" );
    puts( "\t                   and the age files. -na and -np are mutually" );
    puts( "\t                   exclusive." );
    puts( "\t-fp forces writing of entire objects instead of just difference" );
    puts( "\t                   buffers, for debugging purposes." );
    puts( "\t-l limits processing to the single age given. Don't put a space between the l." );
    puts( "\t                   and the age name." );
    puts( "\t-a specifies a different directory to put the modified age files in. If not" );
    puts( "\t                   specified, age files are overwritten in the newDir." );
    puts( "" );

    return -1;
}

hsBool  ReadConfig( const char *filename )
{
    hsUNIXStream    config;


    if( !config.Open( filename, "rt" ) )
        return false;

    char    line[ 512 ];
    int     lineNum = 1;

    while( config.ReadLn( line, sizeof( line ) ) )
    {
        // Switch based on command
        if( stricmp( line, "[pageFilters]" ) == 0 )
            fCurrFilterList = &fPageFilters;
        else if( fCurrFilterList != nil )
        {
            fCurrFilterList->Append( new plStrFilter( line ) );
        }
        else
        {

            char *tok = strtok( line, " \t=" );
            if( tok != nil )
            {
                if( stricmp( tok, "datDir" ) == 0 )
                {
                    tok = strtok( nil, " \t=" );
                    if( tok != nil )
                        strcpy( gDatDirectory, tok );
                    else
                    {
                        printf( "Parse error in init file, line %d", lineNum );
                        return false;
                    }
                }
                else if( stricmp( tok, "destFile" ) == 0 )
                {
                    tok = strtok( nil, "\n\r" );
                    if( tok == nil )
                    {
                        printf( "Parse error in init file, line %d", lineNum );
                        return false;
                    }
                    strcpy( gDestFileName, tok );
                }
                else
                {
                    printf( "Parse error in init file, line %d", lineNum );
                }
            }
        }
        lineNum++;
    }

    config.Close();
    return true;
}

//// Our Main Page Iterator //////////////////////////////////////////////////

class plPageStuffer : public plRegistryPageIterator
{
    public:

        virtual hsBool  EatPage( plRegistryPageNode *page )
        {
            const plPageInfo &info = page->GetPageInfo();
            if( plStrFilter::Passes( info, fPageFilters ) )
                fSourcePages.Append( page );
            return true;
        }
};

//// IShutdown ///////////////////////////////////////////////////////////////

void    IShutdown( int retCode )
{
    uint32_t  i;

    for( i = 0; i < fPageFilters.GetCount(); i++ )
        delete fPageFilters[ i ];

    delete gDestMergeData;

    hsgResMgr::Shutdown();

    if( retCode == 0 )
        printf( "Finished!\n" );
    else
        exit( retCode );
}

//// main ////////////////////////////////////////////////////////////////////

int main( int argc, char *argv[] )
{
    puts( "-----------------------------------------------------" );
    puts( "plDatMerger - Plasma 2 dat file merging utility" );
    puts( "-----------------------------------------------------" );

    if( argc < 1 || argc > 8 )
        return PrintHelp();

    // Read our config
    ReadConfig( argv[ 1 ] );

    plResMgrSettings::Get().SetFilterNewerPageVersions( false );
    plResMgrSettings::Get().SetFilterOlderPageVersions( false );

    // Init our special resMgr
    puts( "Initializing resManager..." );
    gResManager = new plRawResManager;
    hsgResMgr::Init( gResManager );

    // Load the registry in to work with
    printf( "Loading registry from directory \"%s\"...\n", gDatDirectory );
    gResManager->AddSource( new plRegistryDiskSource( gDatDirectory ) );

    // Iterate and collect pages to merge
    printf( "Collecting pages...\n" );
    plPageStuffer   pageIter;
    gResManager->IterateAllPages( &pageIter );

    if( fSourcePages.GetCount() == 0 )
    {
        puts( "ERROR: No source pages found to merge!" );
        IShutdown( -1 );
    }


    // Create a merged data source to represent our dest page
    printf( "Merging %d pages to file(s) %s...\n", fSourcePages.GetCount(), gDestFileName );

    gDestMergeData = new plRegistryDiskMergedSourceData( gDestFileName );
    gDestMergeData->SetNumEntries( fSourcePages.GetCount() );

    // Open the dest merged streams and write out our initial, incorrect, entry table so we can get positions right
    hsStream *destIdxStream = gDestMergeData->WriteEntries( true );
    hsStream *destDatStream = gDestMergeData->OpenData( (uint32_t)-1, "wb" );

    uint32_t i, bytesRead;
    static uint8_t    scratchBuffer[ 1024 * 64 ];     // 32k in size
    for( i = 0; i < fSourcePages.GetCount(); i++ )
    {
        printf( "  Merging %s>%s...\n", fSourcePages[ i ]->GetPageInfo().GetAge(), fSourcePages[ i ]->GetPageInfo().GetPage() );

        // For each page, we open the source streams, read the ENTIRE thing in, front to back, and append it
        // to the dest stream. We then update the entry in the mergeData to reflect our info
        plMSDEntry &entry = gDestMergeData->GetEntry( i );

        entry.fIdxOffset = destIdxStream->GetPosition();
        entry.fDatOffset = destDatStream->GetPosition();

        /// Actually transfer the data
        plRegistrySource *srcSource = fSourcePages[ i ]->GetSource();

        // Idx first
        hsStream *srcStream = srcSource->OpenIndexStream( fSourcePages[ i ] );
        uint32_t size = srcStream->GetEOF();
        do
        {
            bytesRead = srcStream->Read( size > sizeof( scratchBuffer ) ? sizeof( scratchBuffer ) : size, scratchBuffer );
            if( bytesRead > 0 )
                destIdxStream->Write( bytesRead, scratchBuffer );
            size -= bytesRead;
        } while( size > 0 && bytesRead > 0 );
        srcSource->CloseIndexStream( fSourcePages[ i ] );

        // Now dat
        srcStream = srcSource->OpenDataStream( fSourcePages[ i ] );
        size = srcStream->GetEOF();
        do
        {
            bytesRead = srcStream->Read( size > sizeof( scratchBuffer ) ? sizeof( scratchBuffer ) : size, scratchBuffer );
            if( bytesRead > 0 )
                destDatStream->Write( bytesRead, scratchBuffer );
            size -= bytesRead;
        } while( size > 0 && bytesRead > 0 );
        srcSource->CloseDataStream( fSourcePages[ i ] );

        // Update lengths
        entry.fIdxLength = destIdxStream->GetPosition() - entry.fIdxOffset;
        entry.fDatLength = destDatStream->GetPosition() - entry.fDatOffset; 
    }

    printf( "Closing destination files...\n" );
    destIdxStream->Close();
    destDatStream->Close();

    // Re-write the entry table, now that it's correct
    printf( "Updating merged table...\n" );
    gDestMergeData->WriteEntries( false );

    puts( "Shutting down..." );
    IShutdown( 0 );
    return 0;
}

