/*
//
// Copyright (C) 2006-2026 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 : extadf_loader.c
// Contains: Extended ADF floppy image loader
//
// Written by: Jean-François DEL NERO
//
// 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 "extadf_loader.h"

#include "libhxcadaptor.h"

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

	if( hxc_checkfileext(imgfile->path,"adf",SYS_PATH_TYPE) )
	{
		if(!strncmp((char*)imgfile->file_header,"UAE-1ADF",8))
		{
			imgldr_ctx->hxcfe->hxc_printf(MSG_DEBUG,"EXTADF_libIsValidDiskFile : Extended ADF file (new version)!");
			return HXCFE_VALIDFILE;
		}

		return HXCFE_BADFILE;
	}
	else
	{
		imgldr_ctx->hxcfe->hxc_printf(MSG_DEBUG,"EXTADF_libIsValidDiskFile : non Extended ADF file !");
		return HXCFE_BADFILE;
	}
}

int EXTADF_libLoad_DiskFile(HXCFE_IMGLDR * imgldr_ctx,HXCFE_FLOPPY * floppydisk,char * imgfile,void * parameters)
{
	FILE * f;
	unsigned int filesize;
	int i,j;
	unsigned char* trackdata;
	int tracklen;
	HXCFE_CYLINDER* currentcylinder;
	unsigned int numberoftrack;

	unsigned char header[12];
	unsigned char * tracktable;
	unsigned int trackindex,tracksize,tracksize_bit;

	int gap3len,skew,trackformat,interleave;
	int sectorsize;

	tracktable = NULL;

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

	f = hxc_fopen(imgfile,"rb");
	if( f == NULL )
	{
		imgldr_ctx->hxcfe->hxc_printf(MSG_ERROR,"Cannot open %s !",imgfile);
		return HXCFE_ACCESSERROR;
	}

	filesize = hxc_fgetsize(f);

	if( !filesize )
	{
		imgldr_ctx->hxcfe->hxc_printf(MSG_ERROR,"Bad file size : %d !",filesize);
		hxc_fclose(f);
		return HXCFE_BADFILE;
	}

	memset(header,0,sizeof(header));
	hxc_fread(header,12,f);

	numberoftrack=0;
	if(!strncmp((char*)header,"UAE-1ADF",8))
	{
		numberoftrack=header[0xB]+(header[0xA]*256);
		tracktable = malloc(12*numberoftrack);
		if( !tracktable )
			goto alloc_error;

		memset(tracktable,0,12*numberoftrack);

		hxc_fread(tracktable,12*numberoftrack,f);
	}
	trackindex=0;

	floppydisk->floppyNumberOfTrack=numberoftrack>>1;
	if(numberoftrack&1) floppydisk->floppyNumberOfTrack++;

	sectorsize=512;
	interleave=1;
	gap3len=0;
	skew=0;
	trackformat=AMIGAFORMAT_DD;

	floppydisk->floppySectorPerTrack=-1;
	floppydisk->floppyNumberOfSide=2;
	floppydisk->floppyBitRate=DEFAULT_AMIGA_BITRATE;
	floppydisk->floppyiftype=AMIGA_DD_FLOPPYMODE;
	floppydisk->tracks = (HXCFE_CYLINDER**)malloc(sizeof(HXCFE_CYLINDER*)*floppydisk->floppyNumberOfTrack);

	if(!floppydisk->tracks)
		goto alloc_error;

	tracklen=(DEFAULT_AMIGA_BITRATE/(DEFAULT_AMIGA_RPM/60))/4;

	imgldr_ctx->hxcfe->hxc_printf(MSG_DEBUG,"Extended ADF : %x tracks",numberoftrack);

	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);

			if(trackindex<numberoftrack)
			{

				tracksize=( (unsigned int)tracktable[(12*trackindex)+5] << 16 ) | \
						  ( (unsigned int)tracktable[(12*trackindex)+6] << 8 )  | \
						  ( (unsigned int)tracktable[(12*trackindex)+7] );

				if(tracksize)
				{

					if(tracktable[(12*trackindex)+3]==1)
					{
						imgldr_ctx->hxcfe->hxc_printf(MSG_DEBUG,"[%.3d:%.1X] Reading Non-DOS track at 0x%.8x, Size : 0x%.8x",j,i,ftell(f),tracksize);

						currentcylinder->sides[i]=tg_alloctrack(DEFAULT_AMIGA_BITRATE,AMIGA_MFM_ENCODING,DEFAULT_AMIGA_RPM,(tracksize)*8,2500,-100,0x00);
						hxc_fread(currentcylinder->sides[i]->databuffer,tracksize,f);
						currentcylinder->sides[i]->number_of_sector=floppydisk->floppySectorPerTrack;

					}
					else
					{
						tracksize_bit=( (unsigned int)tracktable[(12*trackindex)+9]  << 16 )  | \
									  ( (unsigned int)tracktable[(12*trackindex)+10] << 8 )   | \
									  ( (unsigned int)tracktable[(12*trackindex)+11] );

						tracksize_bit /= 8;

						if(tracksize)
						{
							trackdata = (unsigned char*)malloc(tracksize);
							if(trackdata)
							{
								imgldr_ctx->hxcfe->hxc_printf(MSG_DEBUG,"[%.3d:%.1X] Reading DOS track at 0x%.8x, Size : 0x%.8x",j,i,ftell(f),tracksize);

								hxc_fread(trackdata,tracksize,f);

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

								free(trackdata);
								trackdata = NULL;
							}
						}
					}
				}
				else
				{
					imgldr_ctx->hxcfe->hxc_printf(MSG_DEBUG,"[%.3d:%.1X] Null Size track!",j,i);
					currentcylinder->sides[i]=tg_alloctrack(DEFAULT_AMIGA_BITRATE,AMIGA_MFM_ENCODING,DEFAULT_AMIGA_RPM,(tracklen)*8,2500,-11360,0x00);
				}
			}
			else
			{
				imgldr_ctx->hxcfe->hxc_printf(MSG_DEBUG,"[%.3d:%.1X] No track!",j,i);
				currentcylinder->sides[i]=tg_alloctrack(DEFAULT_AMIGA_BITRATE,AMIGA_MFM_ENCODING,DEFAULT_AMIGA_RPM,(tracklen)*8,2500,-11360,0x00);
			}

			trackindex++;
		}
	}

	free(tracktable);

	imgldr_ctx->hxcfe->hxc_printf(MSG_INFO_1,"track file successfully loaded and encoded!");
	hxc_fclose(f);

	hxcfe_sanityCheck(imgldr_ctx->hxcfe,floppydisk);

	return HXCFE_NOERROR;

alloc_error:

	free(tracktable);

	hxc_fclose(f);

	hxcfe_freeFloppy(imgldr_ctx->hxcfe, floppydisk );

	return HXCFE_INTERNALERROR;
}

int EXTADF_libGetPluginInfo(HXCFE_IMGLDR * imgldr_ctx,uint32_t infotype,void * returnvalue)
{
	static const char plug_id[]="AMIGA_EXTADF";
	static const char plug_desc[]="AMIGA EXTENDED ADF Loader";
	static const char plug_ext[]="adf";

	plugins_ptr plug_funcs=
	{
		(ISVALIDDISKFILE)   EXTADF_libIsValidDiskFile,
		(LOADDISKFILE)      EXTADF_libLoad_DiskFile,
		(WRITEDISKFILE)     0,
		(GETPLUGININFOS)    EXTADF_libGetPluginInfo
	};

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