/* $Id: cpl_stats-test.c,v 1.21 2008/02/07 10:54:01 llundin Exp $
 *
 * This file is part of the ESO Common Pipeline Library
 * Copyright (C) 2001-2004 European Southern Observatory
 *
 * This program 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.
 *
 * This program 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 this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

/*
 * $Author: llundin $
 * $Date: 2008/02/07 10:54:01 $
 * $Revision: 1.21 $
 * $Name:  $
 */

/*-----------------------------------------------------------------------------
                                   Includes
 -----------------------------------------------------------------------------*/

#include <stdio.h>
#include <math.h>
#include <float.h>

#include "cpl_stats.h"
#include "cpl_image_gen.h"
#include "cpl_image_io.h"
#include "cpl_image_bpm.h"
#include "cpl_memory.h"
#include "cpl_tools.h"

/*-----------------------------------------------------------------------------
                                  Main
 -----------------------------------------------------------------------------*/
int main(void)
{
    cpl_image * imf;
    cpl_image * imd;
    cpl_image * imi;
    cpl_stats * stats;
    double      med1, med2;
    double      sig;
    int         is_rejected;
    FILE      * stream = NULL;

    cpl_test_init(PACKAGE_BUGREPORT, CPL_MSG_WARNING);

    if (cpl_msg_get_level() > CPL_MSG_INFO) {
        stream = fopen("/dev/null", "a");
    }
    if (stream == NULL) stream = stdout;

    /* Insert tests below */


    /* FIXME: : Extend test to more than absence of failure... */

    /* Create images: imf1, imf2, imd1, imd2, imi1, imi2 */
    cpl_test( imd = cpl_image_fill_test_create(512, 512) );
    cpl_test( imf = cpl_image_cast(imd, CPL_TYPE_FLOAT) );
    cpl_test( imi = cpl_image_cast(imd, CPL_TYPE_INT) );

    /* Get statistics on the imi */
    cpl_msg_info("","Get statistics on imi:");
    cpl_test( stats = cpl_stats_new_from_image(imi, CPL_STATS_ALL) );
    cpl_test_zero( cpl_stats_dump(stats, CPL_STATS_ALL, stream) );
    cpl_stats_delete(stats);

    /* Get statistics on the imf */
    cpl_msg_info("","Get statistics on imf:");
    cpl_test( stats = cpl_stats_new_from_image(imf, CPL_STATS_ALL) );
    cpl_test_zero( cpl_stats_dump(stats, CPL_STATS_ALL, stream) );
    cpl_stats_delete(stats);
    
    /* Get statistics on the imd */
    cpl_msg_info("","Get statistics on imd:");
    cpl_test( stats = cpl_stats_new_from_image(imd, CPL_STATS_ALL) );
    cpl_test_zero( cpl_stats_dump(stats, CPL_STATS_ALL, stream) );
    cpl_stats_delete(stats);
    cpl_image_delete(imi);
    cpl_image_delete(imd);

    med2 = cpl_image_get_median(imf);

    /* Test cpl_image_get_median_dev() */
    med1 = cpl_image_get_median_dev(imf, &sig);
    cpl_test( fabs(med1-med2) <= 2*DBL_EPSILON * fabs(med1) );
    
    /* Test cpl_image_get() on a bad pixel */
    cpl_test_zero( cpl_image_reject(imf, 10, 10) );

    med1 = cpl_image_get(imf, 10, 10, &is_rejected);
    cpl_test_error( CPL_ERROR_NONE);
    cpl_test( is_rejected );
    
    /* Free and return */
    cpl_image_delete(imf);
    if (stream != stdout) cpl_test_zero( fclose(stream) );

    /* End of tests */
    return cpl_test_end(0);
}