/* -*- Mode: C -*-
  ======================================================================
  FILE: recur.c
  CREATOR: ebusboom 8jun00
  
  DESCRIPTION:

  Test program for expanding recurrences. Run as:

     ./recur ../../test-data/recur.txt

  
  (C) COPYRIGHT 1999 Eric Busboom 
  http://www.softwarestudio.org

  The contents of this file are subject to the Mozilla Public License
  Version 1.0 (the "License"); you may not use this file except in
  compliance with the License. You may obtain a copy of the License at
  http://www.mozilla.org/MPL/
 
  Software distributed under the License is distributed on an "AS IS"
  basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
  the License for the specific language governing rights and
  limitations under the License.

  ======================================================================*/

#include <assert.h>
#include <string.h> /* for strdup */
#include <stdlib.h> /* for malloc */
#include <stdio.h> /* for printf */
#include <time.h> /* for time() */
#include <signal.h> /* for signal */
#ifndef WIN32
#include <unistd.h> /* for alarm */
#endif

#include <libical/ical.h>
#include <libicalss/icalss.h>

#ifdef WIN32
#define snprintf _snprintf
#endif
#ifdef _MSC_VER
#define strcasecmp stricmp
#endif

static void sig_alrm(int i){
    fprintf(stderr,"Could not get lock on file\n");
    exit(1);
}

static void recur_callback(icalcomponent *comp,
			   struct icaltime_span *span,
			   void *data)
{
  printf("cb: %s", ctime(&span->start));
  printf("    %s\n", ctime(&span->end));

}

int main(int argc, char *argv[])
{
    icalset *cin;
    struct icaltimetype next;
    icalcomponent *itr;
    icalproperty *desc, *dtstart, *rrule;
    struct icalrecurrencetype recur;
    icalrecur_iterator* ritr;
    time_t tt;
    char* file; 
	
    icalerror_set_error_state(ICAL_PARSE_ERROR, ICAL_ERROR_NONFATAL);
	
#ifndef WIN32
    signal(SIGALRM,sig_alrm);
#endif
	
    if (argc <= 1){
		file = "../../test-data/recur.txt";
    } else if (argc == 2){
		file = argv[1];
    } else {
		fprintf(stderr,"usage: recur [input file]\n");
		exit(1);
    }
	
#ifndef WIN32
    alarm(300); /* to get file lock */
#endif
    cin = icalfileset_new(file);
#ifndef WIN32
    alarm(0);
#endif
	
    if(cin == 0){
		fprintf(stderr,"recur: can't open file %s\n",file);
		exit(1);
    }
	
	
    for (itr = icalfileset_get_first_component(cin);
	itr != 0;
	itr = icalfileset_get_next_component(cin)){
		
      struct icaltimetype start = icaltime_from_timet(1,0);
      struct icaltimetype end = icaltime_today();



		desc = icalcomponent_get_first_property(itr,ICAL_DESCRIPTION_PROPERTY);
		dtstart = icalcomponent_get_first_property(itr,ICAL_DTSTART_PROPERTY);
		rrule = icalcomponent_get_first_property(itr,ICAL_RRULE_PROPERTY);
		
		if (desc == 0 || dtstart == 0 || rrule == 0){
			printf("\n******** Error in input component ********\n");
			printf("The following component is malformed:\n %s\n",
				icalcomponent_as_ical_string(itr));
			continue;
		}
		
		printf("\n\n#### %s\n",icalproperty_get_description(desc));
		printf("#### %s\n",icalvalue_as_ical_string(icalproperty_get_value(rrule)));
		recur = icalproperty_get_rrule(rrule);
		start = icalproperty_get_dtstart(dtstart);
		
		ritr = icalrecur_iterator_new(recur,start);
		
		tt = icaltime_as_timet(start);
		
		printf("#### %s\n",ctime(&tt ));

		icalrecur_iterator_free(ritr);
		
		for(ritr = icalrecur_iterator_new(recur,start),
			next = icalrecur_iterator_next(ritr); 
		!icaltime_is_null_time(next);
		next = icalrecur_iterator_next(ritr)){
			
			tt = icaltime_as_timet(next);
			
			printf("  %s",ctime(&tt ));		
			
		}
		icalrecur_iterator_free(ritr);

      icalcomponent_foreach_recurrence(itr, start, end, 
				       recur_callback, NULL);
      

		
    }

	icalset_free(cin);

	icaltimezone_free_builtin_timezones();
	
	icalmemory_free_ring();
	
	free_zone_directory();
	
    return 0;
}
