/*
# This file is part of the Astrometry.net suite.
# Licensed under a 3-clause BSD style license - see LICENSE
*/

/*-------------------------------------------------------------
 * This file is used to make a table with one column containing
 * whether the star was flagged as a diffraction spike by our
 * algorithm (ie. erroneous).
 * ------------------------------------------------------------
 */

#include <stdio.h>
#include "fitsioutils.h"

int create_table(FILE* inFid, FILE* outFid){
	int c, nEntries = 0;
	int x = 0;
   qfits_table* tbl;
   qfits_header* tbl_hdr;

	// create table header
	qfits_header* hdr = qfits_table_prim_header_default();
	qfits_header_dump(hdr, outFid);

	// create table
	tbl = qfits_table_new("spikes",QFITS_BINTABLE,1,1,0);
	// add column
	fits_add_column(tbl, 0,TFITS_BIN_TYPE_X, 1, " ", "diffraction spike"); 
	
	tbl_hdr = qfits_table_ext_header_default(tbl); 
	qfits_header_dump(tbl_hdr, outFid);

	// fill in content of table
	while((c = fgetc(inFid)) != EOF){
		// show progress
		if (x==100000){
			printf(".");
			x=0;
		}else{
			x++;
		}
		//printf("%c", c);
		fits_write_data_X(outFid,((unsigned char)c));
		nEntries++;
	}
	fits_pad_file(outFid);
	// fix the headers
	tbl->nr = nEntries;
	tbl_hdr = qfits_table_ext_header_default(tbl);
	fix_headers(outFid, hdr, tbl_hdr);
	
	qfits_header_destroy(hdr);
	qfits_header_destroy(tbl_hdr);
	qfits_table_close(tbl);
	return 0;
}

int fix_headers(FILE* fId, qfits_header* hdr, qfits_header* tbl_hdr){
	char val[32];
	off_t offset;
	offset = ftello(fId);
	fseeko(fId, 0, SEEK_SET);

	// write header
	qfits_header_dump(hdr, fId);

	// write table header again
	qfits_header_dump(tbl_hdr, fId);

	// point to the end of the file again
	fseek(fId, offset, SEEK_SET);
	return 0;
}

int main(int argc, char* argv[]){
	if (argc==3){
		FILE* inFid,outFid;
	   
		printf("processing %s ", argv[1]);

		// open files for reading/writing
		inFid = fopen(argv[1], "r");
		outFid = fopen(argv[2], "w");

		// create table and write to output file
		create_table(inFid, outFid);

		fclose(inFid);
		fclose(outFid);
		printf(" finished \n");
	} else {
		printf("Usage: spike_join inputFile outputFile\n");
	}
	return 1;
}