/*
  This file is part of the Astrometry.net suite.
  Copyright 2006, 2007 Dustin Lang, Keir Mierle and Sam Roweis.
  Copyright 2009, 2010, 2012 Dustin Lang.

  The Astrometry.net suite 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, version 2.

  The Astrometry.net suite 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 the Astrometry.net suite ; if not, write to the Free Software
  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
*/
#include <sys/param.h>
#include <assert.h>

#include "plotradec.h"
#include "rdlist.h"
#include "cairoutils.h"
#include "log.h"
#include "errors.h"
#include "sip_qfits.h"

DEFINE_PLOTTER(radec);

plotradec_t* plot_radec_get(plot_args_t* pargs) {
	return plotstuff_get_config(pargs, "radec");
}

void plot_radec_reset(plotradec_t* args) {
	if (args->radecvals)
		dl_free(args->radecvals);
	if (args->racol)
		free(args->racol);
	if (args->deccol)
		free(args->deccol);
	if (args->fn)
		free(args->fn);
	memset(args, 0, sizeof(plotradec_t));
	args->ext = 1;
	args->radecvals = dl_new(32);
}

void* plot_radec_init(plot_args_t* plotargs) {
	plotradec_t* args = calloc(1, sizeof(plotradec_t));
	plot_radec_reset(args);
	return args;
}

static rd_t* get_rd(plotradec_t* args, rd_t* myrd) {
	rdlist_t* rdls = NULL;
	rd_t* rd = NULL;
	if (args->fn) {
		// Open rdlist.
		rdls = rdlist_open(args->fn);
		if (!rdls) {
			ERROR("Failed to open rdlist from file \"%s\"", args->fn);
			return NULL;
		}
		if (args->racol)
			rdlist_set_raname(rdls, args->racol);
		if (args->deccol)
			rdlist_set_decname(rdls, args->deccol);

		// Find number of entries in rdlist.
		rd = rdlist_read_field_num(rdls, args->ext, NULL);
		//freerd = rd;
		rdlist_close(rdls);
		if (!rd) {
			ERROR("Failed to read FITS extension %i from file %s.\n", args->ext, args->fn);
			return NULL;
		}
	} else {
		assert(dl_size(args->radecvals));
		rd_from_dl(myrd, args->radecvals);
		rd = myrd;
	}
	return rd;
}

int plot_radec_plot(const char* command, cairo_t* cairo,
				 plot_args_t* pargs, void* baton) {
	plotradec_t* args = (plotradec_t*)baton;
	// Plot it!
	rd_t myrd;
	rd_t* rd = NULL;
	//rd_t* freerd = NULL;
	int Nrd;
	int i;

	if (!pargs->wcs) {
		ERROR("plotting radec but not plot_wcs has been set.");
		return -1;
	}

	if (args->fn && dl_size(args->radecvals)) {
		ERROR("Can only plot one of rdlist filename and radec_vals");
		return -1;
	}
	if (!args->fn && !dl_size(args->radecvals)) {
		ERROR("Neither rdlist filename nor radec_vals given!");
		return -1;
	}

	plotstuff_builtin_apply(cairo, pargs);

	rd = get_rd(args, &myrd);
	if (!rd) return -1;
	Nrd = rd_n(rd);
	// If N is specified, apply it as a max.
	if (args->nobjs)
		Nrd = MIN(Nrd, args->nobjs);

	// Plot markers.
	for (i=args->firstobj; i<Nrd; i++) {
		double x,y;
		double ra = rd_getra(rd, i);
		double dec = rd_getdec(rd, i);
		if (!plotstuff_radec2xy(pargs, ra, dec, &x, &y))
			continue;
		if (!plotstuff_marker_in_bounds(pargs, x, y))
			continue;
		plotstuff_stack_marker(pargs, x-1, y-1);
	}
	plotstuff_plot_stack(pargs, cairo);

	if (rd != &myrd)
		rd_free(rd);
	//rd_free(freerd);
	return 0;
}

int plot_radec_count_inbounds(plot_args_t* pargs, plotradec_t* args) {
	rd_t myrd;
	rd_t* rd = NULL;
	int i, Nrd, nib;

	rd = get_rd(args, &myrd);
	if (!rd) return -1;
	Nrd = rd_n(rd);
	// If N is specified, apply it as a max.
	if (args->nobjs)
		Nrd = MIN(Nrd, args->nobjs);
	nib = 0;
	for (i=args->firstobj; i<Nrd; i++) {
		double x,y;
		double ra = rd_getra(rd, i);
		double dec = rd_getdec(rd, i);
		if (!plotstuff_radec2xy(pargs, ra, dec, &x, &y))
			continue;
		if (!plotstuff_marker_in_bounds(pargs, x, y))
			continue;
		nib++;
	}
	if (rd != &myrd)
		rd_free(rd);
	return nib;
}

void plot_radec_set_racol(plotradec_t* args, const char* col) {
	free(args->racol);
	args->racol = strdup_safe(col);
}

void plot_radec_set_deccol(plotradec_t* args, const char* col) {
	free(args->deccol);
	args->deccol = strdup_safe(col);
}

void plot_radec_set_filename(plotradec_t* args, const char* fn) {
	free(args->fn);
	args->fn = strdup_safe(fn);
}

void plot_radec_vals(plotradec_t* args, double ra, double dec) {
	dl_append(args->radecvals, ra);
	dl_append(args->radecvals, dec);
}

int plot_radec_command(const char* cmd, const char* cmdargs,
					plot_args_t* plotargs, void* baton) {
	plotradec_t* args = (plotradec_t*)baton;
	if (streq(cmd, "radec_file")) {
		plot_radec_set_filename(args, cmdargs);
	} else if (streq(cmd, "radec_ext")) {
		args->ext = atoi(cmdargs);
	} else if (streq(cmd, "radec_racol")) {
		plot_radec_set_racol(args, cmdargs);
	} else if (streq(cmd, "radec_deccol")) {
		plot_radec_set_deccol(args, cmdargs);
	} else if (streq(cmd, "radec_firstobj")) {
		args->firstobj = atoi(cmdargs);
	} else if (streq(cmd, "radec_nobjs")) {
		args->nobjs = atoi(cmdargs);
	} else if (streq(cmd, "radec_vals")) {
		plotstuff_append_doubles(cmdargs, args->radecvals);
	} else {
		ERROR("Did not understand command \"%s\"", cmd);
		return -1;
	}
	return 0;
}

void plot_radec_free(plot_args_t* plotargs, void* baton) {
	plotradec_t* args = (plotradec_t*)baton;
	free(args->radecvals);
	free(args->racol);
	free(args->deccol);
	free(args->fn);
	free(args);
}

