
/*
 * Copyright (c) 2010-2022 Belledonne Communications SARL.
 *
 * This file is part of Liblinphone
 * (see https://gitlab.linphone.org/BC/public/liblinphone).
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero 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 Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero 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;
}
