
/*
 * Copyright (c) 2010-2019 Belledonne Communications SARL.
 *
 * This file is part of Liblinphone.
 *
 * 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 3 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, see <http://www.gnu.org/licenses/>.
 */

/**
 * @defgroup basic_call_tutorials Basic call
 * @ingroup tutorials
 This program is a _very_ simple usage example of liblinphone.
 It just takes a sip-uri as first argument and attempts to call it

 @include helloworld.c
 */

#include "linphone/core.h"

#include <signal.h>

static bool_t running=TRUE;

static void stop(int signum){
	running=FALSE;
}

/*
 * Call state notification callback
 */
static void call_state_changed(LinphoneCore *lc, LinphoneCall *call, LinphoneCallState cstate, const char *msg){
	switch(cstate){
		case LinphoneCallOutgoingRinging:
			printf("It is now ringing remotely !\n");
		break;
		case LinphoneCallOutgoingEarlyMedia:
			printf("Receiving some early media\n");
		break;
		case LinphoneCallConnected:
			printf("We are connected !\n");
		break;
		case LinphoneCallStreamsRunning:
			printf("Media streams established !\n");
		break;
		case LinphoneCallEnd:
			printf("Call is terminated.\n");
		break;
		case LinphoneCallError:
			printf("Call failure !");
		break;
		default:
			printf("Unhandled notification %i\n",cstate);
	}
}

int main(int argc, char *argv[]){
	LinphoneCoreVTable vtable={0};
	LinphoneCore *lc;
	LinphoneCall *call=NULL;
	const char *dest=NULL;

	/* take the destination sip uri from the command line arguments */
	if (argc>1){
		dest=argv[1];
	}

	signal(SIGINT,stop);

#ifdef DEBUG_LOGS
	linphone_core_enable_logs(NULL); /*enable liblinphone logs.*/
#endif
	/* 
	 Fill the LinphoneCoreVTable with application callbacks.
	 All are optional. Here we only use the call_state_changed callbacks
	 in order to get notifications about the progress of the call.
	 */
	vtable.call_state_changed=call_state_changed;

	/*
	 Instanciate a LinphoneCore object given the LinphoneCoreVTable
	*/
	lc=linphone_core_new(&vtable,NULL,NULL,NULL);

	if (dest){
		/*
		 Place an outgoing call
		*/
		call=linphone_core_invite(lc,dest);
		if (call==NULL){
			printf("Could not place call to %s\n",dest);
			goto end;
		}else printf("Call to %s is in progress...",dest);
		linphone_call_ref(call);
	}
	/* main loop for receiving notifications and doing background linphonecore work: */
	while(running){
		linphone_core_iterate(lc);
		ms_usleep(50000);
	}
	if (call && linphone_call_get_state(call)!=LinphoneCallEnd){
		/* terminate the call */
		printf("Terminating the call...\n");
		linphone_core_terminate_call(lc,call);
		/*at this stage we don't need the call object */
		linphone_call_unref(call);
	}

end:
	printf("Shutting down...\n");
	linphone_core_destroy(lc);
	printf("Exited\n");
	return 0;
}

