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#include "imgtypes.h"
#include "garminimg.h"
#include "decoder.h"
#include "decode_img.h"

static class GarminImg *img;
static class ImgFile *ifile;
static class ImgNOD *nod;
static class Decoder *dec;

void decode_nod_unknown1 ();
void decode_nod_unknown2 ();
void decode_nod_unknown3 ();

void decode_nod_header (class Decoder *dec_in, class ImgNOD *nod_in)
{
        udword_t length, offset;
        uword_t rsize;
        off_t soffset, eoffset, hoffset;

        nod= nod_in;
        dec= dec_in;
        img= dec->img;
        ifile= nod->ifile;

        soffset= nod->offset();
        hoffset= nod->h_offset();

        img->seek(hoffset);

        dec->set_outfile("NOD", "header");
        dec->banner("NOD: Header");
        decode_common_header(dec, nod);

        dec->print("Unknown 1 at offset 0x%08x",
                offset= img->get_udword()+soffset);
        dec->print("Unknown 1 length %lu bytes",
                length= img->get_udword());
        nod->unknown1_info.offset= offset;
        nod->unknown1_info.length= length;

        dec->print("???", img->get_uword());
        dec->print("???", img->get_uword());
        dec->print("???", img->get_uword());
        dec->print("???", img->get_uword());

        dec->print("Unknown 2 at offset 0x%08x",
                offset= img->get_udword()+soffset);
        dec->print("Unknown 2 length %lu bytes",
                length= img->get_udword());
        nod->unknown2_info.offset= offset;
        nod->unknown2_info.length= length;

        dec->print("???", img->get_udword());

        dec->print("Unknown 3 at offset 0x%08x",
                offset= img->get_udword()+soffset);
        dec->print("Unknown 3 length %lu bytes",
                length= img->get_udword());
        dec->print("Unknown 3 record size %u bytes?",
                rsize= img->get_byte());
        nod->unknown3_info.offset= offset;
        nod->unknown3_info.length= length;
        nod->unknown3_info.rsize= rsize;

        (void) img->get_string(soffset+nod->hlen-img->tell());
        dec->print("???");
        dec->banner("NOD: End Header");
}

void decode_nod_body ()
{
        decode_nod_unknown1();

        decode_nod_unknown2();

        decode_nod_unknown3();
}

void decode_nod_unknown1 ()
{
        off_t soffset= nod->unknown1_info.offset;
        off_t eoffset= nod->unknown1_info.offset+nod->unknown1_info.length;

        img->seek(soffset);

        dec->set_outfile("NOD", "section1");
        dec->banner("NOD: Section 1");

        dec->print("???", img->get_string(eoffset-soffset).c_str());
}

void decode_nod_unknown2 ()
{
        off_t soffset= nod->unknown2_info.offset;
        off_t eoffset= nod->unknown2_info.offset+nod->unknown2_info.length;
        off_t noffset= eoffset;

        return; // XXX sr fix up this routine
        img->seek(soffset);

        dec->set_outfile("NOD", "section2");
        dec->banner("NOD: Section 2");

        while (img->tell() < eoffset) {
                byte_t data, rclass, sclass;

                noffset= ifile->offset_next(img->tell());
                if ( noffset > eoffset || noffset == 0 ) noffset= eoffset;

                dec->comment("Offset 0x%06x", img->tell()-soffset);
                data= img->get_byte();
                rclass= (data&0xF0)>>4;
                sclass= data&0xF;
                dec->print("Road class 0x%x", rclass);
                dec->comment("Speed class 0x%x", sclass);
                dec->print("NOD1 offset 0x%06x?", img->get_uint24());

                dec->print("???", img->get_string(noffset-img->tell()).c_str());
                dec->comment(NULL);
        }
}

void decode_nod_unknown3 ()
{
        size_t nrecs= nod->unknown3_info.length/nod->unknown3_info.rsize;
        off_t soffset= nod->unknown3_info.offset;
        size_t n;

        img->seek(soffset);

        dec->set_outfile("NOD", "boundary_nodes");
        dec->banner("NOD: Boundary nodes");

        for (n= 1; n<= nrecs; ++n) {
                dec->comment("Record %u", n);
                dec->print("%.6f E", img->degrees(img->get_int24()));
                dec->print("%.6f N", img->degrees(img->get_int24()));
                dec->print("???", img->get_uint24());
                dec->comment(NULL);
        }
}