/*
//
// Copyright (C) 2006-2018 Jean-François DEL NERO
//
// This file is part of the HxCFloppyEmulator library
//
// HxCFloppyEmulator may be used and distributed without restriction provided
// that this copyright statement is not removed from the file and that any
// derivative work contains the original copyright notice and the associated
// disclaimer.
//
// HxCFloppyEmulator 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 2
// of the License, or (at your option) any later version.
//
// HxCFloppyEmulator 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 HxCFloppyEmulator; if not, write to the Free Software
// Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
//
*/
///////////////////////////////////////////////////////////////////////////////////
//-------------------------------------------------------------------------------//
//-------------------------------------------------------------------------------//
//-----------H----H--X----X-----CCCCC----22222----0000-----0000------11----------//
//----------H----H----X-X-----C--------------2---0----0---0----0--1--1-----------//
//---------HHHHHH-----X------C----------22222---0----0---0----0-----1------------//
//--------H----H----X--X----C----------2-------0----0---0----0-----1-------------//
//-------H----H---X-----X---CCCCC-----222222----0000-----0000----1111------------//
//-------------------------------------------------------------------------------//
//----------------------------------------------------- http://hxc2001.free.fr --//
///////////////////////////////////////////////////////////////////////////////////
// File : adz_loader.c
// Contains: ADZ floppy image loader
//
// Written by:	DEL NERO Jean Francois
//
// Change History (most recent first):
///////////////////////////////////////////////////////////////////////////////////

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

#include "types.h"

#include "internal_libhxcfe.h"
#include "libhxcfe.h"
#include "./tracks/track_generator.h"

#include "floppy_loader.h"
#include "floppy_utils.h"

#include "adz_loader.h"
#include "adz_writer.h"

#include "thirdpartylibs/zlib/zlib.h"

#include "libhxcadaptor.h"

#define UNPACKBUFFER 128*1024


int ADZ_libIsValidDiskFile(HXCFE_IMGLDR * imgldr_ctx,char * imgfile)
{
	imgldr_ctx->hxcfe->hxc_printf(MSG_DEBUG,"ADZ_libIsValidDiskFile");

	if(hxc_checkfileext(imgfile,"adz") || hxc_checkfileext(imgfile,"gz"))
	{
		if(hxc_checkfileext(imgfile,"gz"))
		{
			if( !strstr(hxc_getfilenamebase(imgfile,0),".adf.gz") )
			{
				imgldr_ctx->hxcfe->hxc_printf(MSG_DEBUG,"ADZ_libIsValidDiskFile : non ADZ file !");
				return HXCFE_BADFILE;
			}
		}

		imgldr_ctx->hxcfe->hxc_printf(MSG_DEBUG,"ADZ_libIsValidDiskFile : ADZ file !");
		return HXCFE_VALIDFILE;
	}
	else
	{
		imgldr_ctx->hxcfe->hxc_printf(MSG_DEBUG,"ADZ_libIsValidDiskFile : non ADZ file !");
		return HXCFE_BADFILE;
	}
}

int ADZ_libLoad_DiskFile(HXCFE_IMGLDR * imgldr_ctx,HXCFE_FLOPPY * floppydisk,char * imgfile,void * parameters)
{
	unsigned int filesize;
	int32_t i,j;
	unsigned int file_offset;
	int32_t sectorsize;
	int32_t gap3len,skew,trackformat,interleave;
	unsigned char* flatimg;
	gzFile file;
	int err;

	HXCFE_CYLINDER* currentcylinder;

	imgldr_ctx->hxcfe->hxc_printf(MSG_DEBUG,"ADZ_libLoad_DiskFile %s",imgfile);

	file = gzopen(imgfile, "rb");
	if (!file)
	{
		imgldr_ctx->hxcfe->hxc_printf(MSG_ERROR,"gzopen: Error while reading the file!");
		return -1;
	}

	i=0;
	filesize=0;
	flatimg=(unsigned char*)malloc(UNPACKBUFFER);
	do
	{
		err=gzread(file, flatimg+filesize,UNPACKBUFFER );
		filesize=filesize+err;
		flatimg=(unsigned char *)realloc(flatimg,filesize+UNPACKBUFFER);
		i++;
	}while(err>0);

	gzclose(file);

	if(!flatimg)
	{
		imgldr_ctx->hxcfe->hxc_printf(MSG_ERROR,"Unpack error!");
		return HXCFE_BADFILE;
	}

	if(flatimg)
	{
		sectorsize = 512;
		interleave = 1;
		gap3len = 0;
		skew = 0;
		file_offset = 0;
		trackformat = AMIGAFORMAT_DD;

		floppydisk->floppySectorPerTrack=11;
		floppydisk->floppyNumberOfSide=2;
		floppydisk->floppyNumberOfTrack=(filesize/(512*2*floppydisk->floppySectorPerTrack));
		floppydisk->floppyBitRate=DEFAULT_AMIGA_BITRATE;
		floppydisk->floppyiftype=AMIGA_DD_FLOPPYMODE;
		floppydisk->tracks=(HXCFE_CYLINDER**)malloc(sizeof(HXCFE_CYLINDER*)*(floppydisk->floppyNumberOfTrack+4));


		for(j=0;j<floppydisk->floppyNumberOfTrack;j++)
		{
			floppydisk->tracks[j]=allocCylinderEntry(DEFAULT_AMIGA_RPM,floppydisk->floppyNumberOfSide);
			currentcylinder=floppydisk->tracks[j];

			for(i=0;i<floppydisk->floppyNumberOfSide;i++)
			{
				hxcfe_imgCallProgressCallback(imgldr_ctx,(j<<1) + (i&1),floppydisk->floppyNumberOfTrack*2 );

				file_offset=(sectorsize*(j*floppydisk->floppySectorPerTrack*floppydisk->floppyNumberOfSide))+
							(sectorsize*(floppydisk->floppySectorPerTrack)*i);

				currentcylinder->sides[i]=tg_generateTrack(&flatimg[file_offset],sectorsize,floppydisk->floppySectorPerTrack,(unsigned char)j,(unsigned char)i,0,interleave,((j<<1)|(i&1))*skew,floppydisk->floppyBitRate,currentcylinder->floppyRPM,trackformat,gap3len,0,2500,-11150);
			}
		}

		// Add 4 empty tracks
		for(j=floppydisk->floppyNumberOfTrack;j<(floppydisk->floppyNumberOfTrack + 4);j++)
		{
			floppydisk->tracks[j]=allocCylinderEntry(DEFAULT_AMIGA_RPM,floppydisk->floppyNumberOfSide);
			currentcylinder=floppydisk->tracks[j];

			for(i=0;i<floppydisk->floppyNumberOfSide;i++)
			{
				currentcylinder->sides[i]=tg_generateTrack(&flatimg[file_offset],sectorsize,0,(unsigned char)j,(unsigned char)i,0,interleave,((j<<1)|(i&1))*skew,floppydisk->floppyBitRate,currentcylinder->floppyRPM,trackformat,gap3len,0,2500,-11150);
			}
		}

		floppydisk->floppyNumberOfTrack += 4;


		imgldr_ctx->hxcfe->hxc_printf(MSG_INFO_1,"ADZ Loader : tracks file successfully loaded and encoded!");
		return 0;
	}

	return HXCFE_BADFILE;
}

int ADZ_libGetPluginInfo(HXCFE_IMGLDR * imgldr_ctx,uint32_t infotype,void * returnvalue)
{

	static const char plug_id[]="AMIGA_ADZ";
	static const char plug_desc[]="AMIGA ADZ Loader";
	static const char plug_ext[]="adz";

	plugins_ptr plug_funcs=
	{
		(ISVALIDDISKFILE)	ADZ_libIsValidDiskFile,
		(LOADDISKFILE)		ADZ_libLoad_DiskFile,
		(WRITEDISKFILE)		ADZ_libWrite_DiskFile,
		(GETPLUGININFOS)	ADZ_libGetPluginInfo
	};

	return libGetPluginInfo(
			imgldr_ctx,
			infotype,
			returnvalue,
			plug_id,
			plug_desc,
			&plug_funcs,
			plug_ext
			);
}
