/***********************************************************************
 * I_get_ref_points()
 * I_put_ref_points()
 **********************************************************************/
#include "orthophoto.h"
#include <grass/imagery.h>

#define REF_POINT_FILE "REF_POINTS"

int I_read_ref_points (FILE *fd, struct Ortho_Photo_Points *cp)
{
    char buf[100];
    double e1,e2,n1,n2;
    int status;

    cp->count = 0;

/* read the reference point lines. format is:
   image_east image_north  photo_x photo_y  status(1=ok)
*/
    cp->e1 = NULL;
    cp->e2 = NULL;
    cp->n1 = NULL;
    cp->n2 = NULL;
    cp->status = NULL;

/*fprintf (stderr, "Try to read one point \n");*/
    while (G_getl (buf, sizeof(buf), fd))
    {
	G_strip(buf);
	if (*buf == '#' || *buf == 0) continue;
	if (sscanf (buf, "%lf%lf%lf%lf%d", &e1, &n1, &e2, &n2, &status) == 5)
	    I_new_ref_point (cp, e1, n1, e2, n2, status);
	else
	    return -4;
    }

    return 1;
}

int 
I_new_ref_point (struct Ortho_Photo_Points *cp, double e1, double n1, double e2, double n2, int status)
{
    int i;
    size_t size;

/*fprintf (stderr, "Try to new_ref_point \n");*/
    if (status < 0) return 0;
    i = (cp->count)++ ;
    size =  cp->count * sizeof(double) ;
    cp->e1 = (double *) G_realloc (cp->e1, size);
    cp->e2 = (double *) G_realloc (cp->e2, size);
    cp->n1 = (double *) G_realloc (cp->n1, size);
    cp->n2 = (double *) G_realloc (cp->n2, size);
    size =  cp->count * sizeof(int) ;
    cp->status = (int *) G_realloc (cp->status, size);

    cp->e1[i] = e1;
    cp->e2[i] = e2;
    cp->n1[i] = n1;
    cp->n2[i] = n2;
    cp->status[i] = status;

    return 0;
}

int 
I_write_ref_points (FILE *fd, struct Ortho_Photo_Points *cp)
{
    int i;

    fprintf (fd,"# %7s %15s %15s %15s %9s status\n","","image","","photo","");
    fprintf (fd,"# %15s %15s %15s %15s   (1=ok)\n","east","north","x","y");
    fprintf (fd,"#\n");
    for (i = 0; i < cp->count; i++)
	if (cp->status[i] >= 0)
	    fprintf (fd, "  %15f %15f %15f %15f %d\n",
		cp->e1[i], cp->n1[i], cp->e2[i], cp->n2[i], cp->status[i]);

    return 0;
}

int I_get_ref_points (char *groupname, struct Ortho_Photo_Points *cp)
{
    FILE *fd;
    char msg[100];
    int stat;

/*fprintf (stderr, "Try to f_open_group_file_old \n");*/
    fd = I_fopen_group_file_old (groupname, REF_POINT_FILE);
    if (fd == NULL)
    {
	sprintf (msg, "unable to open reference point file for group [%s in %s]",
		groupname, G_mapset());
	G_warning (msg);
	return 0;
    }

/*fprintf (stderr, "Try to read_ref_points \n");*/
    stat = I_read_ref_points (fd, cp);
    fclose (fd);
    if (stat < 0)
    {
	sprintf (msg, "bad format in reference point file for group [%s in %s]",groupname, G_mapset());
	G_warning (msg);
	return 0;
    }
    return 1;
}

int 
I_put_ref_points (char *groupname, struct Ortho_Photo_Points *cp)
{
    FILE *fd;
    char msg[100];

    fd = I_fopen_group_file_new (groupname, REF_POINT_FILE);
    if (fd == NULL)
    {
	sprintf (msg, "unable to create reference point file for group [%s in %s]", groupname, G_mapset());
	G_warning (msg);
	return 0;
    }

    I_write_ref_points (fd, cp);
    fclose (fd);
    return 1;
}


