/* -*- Mode: C -*-
  ======================================================================
  FILE: process.c
  CREATOR: eric 11 February 2000
  
  $Id: process.c,v 1.10 2008-02-03 16:10:46 dothebart Exp $
  $Locker:  $
    
 (C) COPYRIGHT 2000 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.
 
 ======================================================================*/

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include <stdio.h> /* for printf */
#include <errno.h>
#include <string.h> /* For strerror */
#include <stdlib.h> /* for free */

#if defined(_MSC_VER)
#define snprintf _snprintf
#endif

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

void send_message(icalcomponent *reply,const char* this_user)
{
    printf("From: %s\n\n%s\n",this_user,icalcomponent_as_ical_string(reply));
    

}


int main(int argc, char* argv[])
{
    icalcomponent *c, *next_c = NULL;
    int i=0;
    const char *class_string;
    int dont_remove;
    icalfileset_options options = {O_RDONLY, 0644, 0};

    icalset* f = icalset_new(ICAL_FILE_SET, TEST_DATADIR "/process-incoming.ics", &options);
    icalset* trash = icalset_new_file("trash.ics");
    icalset* cal = icalset_new(ICAL_FILE_SET, TEST_DATADIR "/process-calendar.ics", &options);
    icalset* out = icalset_new_file("outgoing.ics");

    const char* this_user = "alice@cal.softwarestudio.org";

    assert(f!= 0);
    assert(cal!=0);
    assert(trash!=0);
    assert(out!=0);


    /* Foreach incoming message */
    for(c=icalset_get_first_component(f);c!=0;c = next_c){
	
	icalproperty_xlicclass class;
	icalcomponent *match;
	icalcomponent *inner; 
	icalcomponent *reply = 0;

	assert(c!=0);

	inner = icalcomponent_get_first_real_component(c);

	i++;
	reply = 0;
	dont_remove = 0;

	if(inner == 0){
	    printf("Bad component, no inner\n %s\n",
		   icalcomponent_as_ical_string(c));
	    continue;
	}

	/* Find a booked component that is matched to the incoming
	   message, based on the incoming component's UID, SEQUENCE
	   and RECURRENCE-ID*/

	match = icalset_fetch_match(cal,c);

	class = icalclassify(c,match,this_user);

	class_string = icalproperty_enum_to_string(class);

	/* Print out the notes associated with the incoming component
           and the matched component in the */
	{
	    const char *c_note=0;
	    const char *m_note=0;
	    icalproperty *p;

	    for(p = icalcomponent_get_first_property(c,ICAL_X_PROPERTY);
		p!= 0;
		p = icalcomponent_get_next_property(c,ICAL_X_PROPERTY)){

		if(strcmp(icalproperty_get_x_name(p),"X-LIC-NOTE")==0){
		    c_note = icalproperty_get_x(p);
		}
	    }
	   
	    if (match != 0){
		for(p = icalcomponent_get_first_property(match,
							 ICAL_X_PROPERTY);
		    p!= 0;
		    p = icalcomponent_get_next_property(match,
							ICAL_X_PROPERTY)){
		    if(strcmp(icalproperty_get_x_name(p),"X-LIC-NOTE")==0){
			m_note = icalproperty_get_x(p);
		    }
		}
	    }
		
	    if(c_note != 0){
		printf("Incoming: %s\n",c_note);
	    }
	    if(m_note != 0){
		printf("Match   : %s\n",m_note);
	    }		
	}

	/* Main processing structure */

	switch (class){
	    case ICAL_XLICCLASS_NONE: { 
		char temp[1024];
		/* Huh? Return an error to sender */
		icalrestriction_check(c);
		icalcomponent_convert_errors(c);

		snprintf(temp,1024,"I can't understand the component you sent. \n Here is the component you sent, possibly with error messages:\n %s",icalcomponent_as_ical_string(c));

		reply = icalmessage_new_error_reply(
		    c,
		    this_user,
		    temp,
		    "",
		    ICAL_UNKNOWN_STATUS
		    );
		    
			   

		break; 
	    }
	    case ICAL_XLICCLASS_PUBLISHNEW: { 
		
		/* Don't accept published events from anyone but
		   self. If self, fall through to ICAL_XLICCLASS_REQUESTNEW */

		

	    }
	    case ICAL_XLICCLASS_REQUESTNEW: { 
		
		/* Book the new component if it does not overlap
		   anything. If the time is busy and the start time is
		   an even modulo 4, delegate to
		   bob@cal.softwarestudio.org. If the time is busy and
		   is 1 modulo 4, counterpropose for the first
		   available free time. Otherwise, deline the meeting */

		icalcomponent *overlaps;
		overlaps = icalclassify_find_overlaps(cal,c);

		if(overlaps == 0){
		    /* No overlaps, book the meeting */
/*		    icalset_add_component(cal,icalcomponent_new_clone(c));*/

		    /* Return a reply */
		    reply = icalmessage_new_accept_reply(c,this_user,
				  	 "I can make it to this meeting");

		    icalset_add_component(out,reply);
		  
		} else {
		    /* There was a conflict, so delegate, counterpropose
		       or decline it */
		    struct icaltimetype dtstart 
			= icalcomponent_get_dtstart(c);
		  
		    if(dtstart.hour%4 == 0){  
			/* Delegate the meeting */
			reply = icalmessage_new_delegate_reply(c, 
			  this_user,
            		  "bob@cal.softwarestudio.org",
			  "Unfortunately, I have another commitment that \
conflicts with this meeting. I am delegating my attendance to Bob. ");

			icalset_add_component(out,reply);
		      
		    } else if (dtstart.hour%4 == 1) {
			/* Counter propose to next available time */
			icalcomponent *newc;
			struct icalperiodtype next_time;

			icalspanlist *spanl = 
			    icalspanlist_new(cal,dtstart,
					     icaltime_null_time());

			next_time = icalspanlist_next_free_time(
			   spanl,icalcomponent_get_dtstart(c));

			newc = icalcomponent_new_clone(c);
			
			icalcomponent_set_dtstart(newc,next_time.start);
			

			/* Hack, the duration of the counterproposed
                           meeting may be longer than the free time
                           available */
			icalcomponent_set_duration(newc,
			     icalcomponent_get_duration(c));
			
			reply = icalmessage_new_counterpropose_reply(c, 
								     newc,
								     this_user,
			   "Unfortunately, I have another commitment that \
conflicts with this meeting. I am proposing a time that works better for me.");
		      
			icalset_add_component(out,reply);

		    } else {
			/* Decline the meeting */
		      
			reply = icalmessage_new_decline_reply(c,
							      this_user,
					  "I can't make it to this meeting");

			icalset_add_component(out,reply);

		    }

		  
		}
		break; 
	    }
	    case ICAL_XLICCLASS_PUBLISHFREEBUSY: {
		/* Store the busy time information in a file named after
		   the sender */
		break;
	    }
	    
	    case ICAL_XLICCLASS_PUBLISHUPDATE: { 
		/* Only accept publish updates from self. If self, fall
		   throught to ICAL_XLICCLASS_REQUESTUPDATE */
	    }

	    case ICAL_XLICCLASS_REQUESTUPDATE: { 
		/* always accept the changes */
		break; 
	    }
	  
	    case ICAL_XLICCLASS_REQUESTRESCHEDULE: { 
		/* Use same rules as REQUEST_NEW */
		icalcomponent *overlaps;
		overlaps = icalclassify_find_overlaps(cal,c);

		break; 
	    }
	    case ICAL_XLICCLASS_REQUESTDELEGATE: { 
	      
		break; 
	    }
	    case ICAL_XLICCLASS_REQUESTNEWORGANIZER: { 
		break; 
	    }
	    case ICAL_XLICCLASS_REQUESTFORWARD: { 
		break; 
	    }
	    case ICAL_XLICCLASS_REQUESTSTATUS: { 
		break; 
	    }

	    case ICAL_XLICCLASS_REQUESTFREEBUSY: { 
		break; 
	    }
	    case ICAL_XLICCLASS_REPLYACCEPT: { 
		/* Change the PARTSTAT of the sender */
		break; 
	    }
	    case ICAL_XLICCLASS_REPLYDECLINE: { 
		/* Change the PARTSTAT of the sender */
		break; 
	    }
	    case ICAL_XLICCLASS_REPLYCRASHERACCEPT: { 
		/* Add the crasher to the ATTENDEE list with the
		   appropriate PARTSTAT */
		break; 
	    }
	    case ICAL_XLICCLASS_REPLYCRASHERDECLINE: { 
		/* Add the crasher to the ATTENDEE list with the
		   appropriate PARTSTAT */
		break; 
	    }
	    case ICAL_XLICCLASS_ADDINSTANCE: { 
		break; 
	    }
	    case ICAL_XLICCLASS_CANCELEVENT: { 
		/* Remove the component */
		break; 
	    }
	    case ICAL_XLICCLASS_CANCELINSTANCE: { 
		break; 
	    }
	    case ICAL_XLICCLASS_CANCELALL: { 
		/* Remove the component */	      
		break; 
	    }
	    case ICAL_XLICCLASS_REFRESH: { 
		/* Resend the latest copy of the request */
		break; 
	    }
	    case ICAL_XLICCLASS_COUNTER: { 
		break; 
	    }
	    case ICAL_XLICCLASS_DECLINECOUNTER: { 
		break; 
	    }
	    case ICAL_XLICCLASS_MALFORMED: { 
		/* Send back an error */
		break; 
	    } 
	    case ICAL_XLICCLASS_OBSOLETE: { 
		printf(" ** Got an obsolete component:\n%s",
		       icalcomponent_as_ical_string(c));
		/* Send back an error */
		break; 
	    } 
	    case ICAL_XLICCLASS_MISSEQUENCED: { 
		printf(" ** Got a missequenced component:\n%s",
		       icalcomponent_as_ical_string(c));
		/* Send back an error */
		break; 
	    }
	    case ICAL_XLICCLASS_UNKNOWN: { 
		printf(" ** Don't know what to do with this component:\n%s",
		       icalcomponent_as_ical_string(c));
		/* Send back an error */
		break; 
	    }
            case ICAL_XLICCLASS_X:
            case ICAL_XLICCLASS_REPLYDELEGATE:
            default: {
            }
	}

#if(0)
	if (reply != 0){	
	    
	    /* Don't send the reply if the RSVP parameter indicates not to*/
	    icalcomponent *reply_inner;
	    icalproperty *attendee;
	    icalparameter *rsvp;
	    
	    reply_inner = icalcomponent_get_first_real_component(reply);
	    attendee = icalcomponent_get_first_property(reply_inner,
							ICAL_ATTENDEE_PROPERTY);
	    rsvp = icalproperty_get_first_parameter(attendee,
						    ICAL_RSVP_PARAMETER);
	    
	    if(rsvp == 0 || icalparameter_get_rsvp(rsvp) == 1){
		icalrestriction_check(reply);
		send_message(reply,this_user);
	    }
	    
	    icalcomponent_free(reply);
	}
#endif 

	if(reply !=0){
	    printf("%s\n",icalcomponent_as_ical_string(reply));
	}
	
	next_c =   icalset_get_next_component(f);
	
	if(dont_remove == 0){
	    /*icalset_remove_component(f,c);
	      icalset_add_component(trash,c);*/
	}
    }

#if (0)
        
    for(c = icalset_get_first_component(out);
	c!=0;
	c = icalset_get_next_component(out)){
	
	printf("%s",icalcomponent_as_ical_string(c));

    }
#endif

    icalset_free(f);
    icalset_free(trash);
    icalset_free(cal);
    icalset_free(out);

    return 0;
}


