/*
 * CallWeaver -- An open source telephony toolkit.
 *
 * Copyright (C) 1999 - 2005, Digium, Inc.
 *
 * Mark Spencer <markster@digium.com>
 *
 * See http://www.callweaver.org for more information about
 * the CallWeaver project. Please do not directly contact
 * any of the maintainers of this project for assistance;
 * the project provides a web site, mailing lists and IRC
 * channels for your use.
 *
 * This program is free software, distributed under the terms of
 * the GNU General Public License Version 2. See the LICENSE file
 * at the top of the source tree.
 */

/*! \file
 *
 * \brief Wait for Ring Application
 * 
 */
#ifdef HAVE_CONFIG_H
#include "confdefs.h"
#endif

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <stdlib.h>
#include <sys/types.h>
#include <ctype.h>

#include "callweaver.h"

CALLWEAVER_FILE_VERSION("$HeadURL$", "$Revision$")

#include "callweaver/file.h"
#include "callweaver/logger.h"
#include "callweaver/channel.h"
#include "callweaver/pbx.h"
#include "callweaver/module.h"
#include "callweaver/options.h"
#include "callweaver/lock.h"

static const char tdesc[] = "Waits until first ring after time";

static void *waitforring_app;
static const char waitforring_name[] = "WaitForRing";
static const char waitforring_synopsis[] = "Wait for Ring Application";
static const char waitforring_syntax[] = "WaitForRing(timeout)";
static const char waitforring_descrip[] =
"Returns 0 after waiting at least timeout seconds. and\n"
"only after the next ring has completed.  Returns 0 on\n"
"success or -1 on hangup\n";


static int waitforring_exec(struct cw_channel *chan, int argc, char **argv, char *result, size_t result_max)
{
	struct localuser *u;
	struct cw_frame *f;
	int res = 0;
	int ms;

	if (argc != 1 || !isdigit(argv[0][0]))
                return cw_function_syntax(waitforring_syntax);

	LOCAL_USER_ADD(u);

	ms = atoi(argv[0]) * 1000;
	while (ms > 0) {
		ms = cw_waitfor(chan, ms);
		if (ms < 0) {
			res = ms;
			break;
		}
		if (ms > 0) {
			f = cw_read(chan);
			if (!f) {
				res = -1;
				break;
			}
			if ((f->frametype == CW_FRAME_CONTROL) && (f->subclass == CW_CONTROL_RING)) {
				if (option_verbose > 2)
					cw_verbose(VERBOSE_PREFIX_3 "Got a ring but still waiting for timeout\n");
			}
			cw_fr_free(f);
		}
	}
	/* Now we're really ready for the ring */
	if (!res) {
		ms = 99999999;
		while(ms > 0) {
			ms = cw_waitfor(chan, ms);
			if (ms < 0) {
				res = ms;
				break;
			}
			if (ms > 0) {
				f = cw_read(chan);
				if (!f) {
					res = -1;
					break;
				}
				if ((f->frametype == CW_FRAME_CONTROL) && (f->subclass == CW_CONTROL_RING)) {
					if (option_verbose > 2)
						cw_verbose(VERBOSE_PREFIX_3 "Got a ring after the timeout\n");
					cw_fr_free(f);
					break;
				}
				cw_fr_free(f);
			}
		}
	}
	LOCAL_USER_REMOVE(u);

	return res;
}

static int unload_module(void)
{
	int res = 0;

	res |= cw_unregister_function(waitforring_app);
	return res;
}

static int load_module(void)
{
	waitforring_app = cw_register_function(waitforring_name, waitforring_exec, waitforring_synopsis, waitforring_syntax, waitforring_descrip);
	return 0;
}


MODULE_INFO(load_module, NULL, unload_module, NULL, tdesc)