#include <stdio.h>
#include <stdlib.h>
#include <esl.h>

static void mycallback(esl_socket_t server_sock, esl_socket_t client_sock, struct sockaddr_in *addr, void *user_data)
{
	esl_handle_t handle = {{0}};
	int done = 0;
	esl_status_t status;
	time_t exp = 0;

	if (fork()) {
		return;
	}

	if (esl_attach_handle(&handle, client_sock, addr) != ESL_SUCCESS) {
		return;
	}


	esl_log(ESL_LOG_INFO, "Connected! %d\n", handle.sock);

	esl_filter(&handle, "unique-id", esl_event_get_header(handle.info_event, "caller-unique-id"));
	esl_events(&handle, ESL_EVENT_TYPE_PLAIN, "SESSION_HEARTBEAT CHANNEL_ANSWER CHANNEL_ORIGINATE CHANNEL_PROGRESS CHANNEL_HANGUP "
			   "CHANNEL_BRIDGE CHANNEL_UNBRIDGE CHANNEL_OUTGOING CHANNEL_EXECUTE CHANNEL_EXECUTE_COMPLETE DTMF CUSTOM conference::maintenance");

	esl_send_recv(&handle, "linger");

	esl_execute(&handle, "answer", NULL, NULL);
	esl_execute(&handle, "conference", "3000@default", NULL);
	
	while((status = esl_recv_timed(&handle, 1000)) != ESL_FAIL) {
		if (done) {
			if (time(NULL) >= exp) {
				break;
			}
		} else if (status == ESL_SUCCESS) {
			const char *type = esl_event_get_header(handle.last_event, "content-type");
			if (type && !strcasecmp(type, "text/disconnect-notice")) {
				const char *dispo = esl_event_get_header(handle.last_event, "content-disposition");
				esl_log(ESL_LOG_INFO, "Got a disconnection notice dispostion: [%s]\n", dispo ? dispo : "");
				if (dispo && !strcmp(dispo, "linger")) {
					done = 1;
					esl_log(ESL_LOG_INFO, "Waiting 5 seconds for any remaining events.\n");
					exp = time(NULL) + 5;
				}
			}
		}
	}
	
	esl_log(ESL_LOG_INFO, "Disconnected! %d\n", handle.sock);
	esl_disconnect(&handle);
}

static esl_socket_t server_sock = ESL_SOCK_INVALID;

static void handle_sig(int sig)
{
	shutdown(server_sock, 2);

}

int main(void)
{
	signal(SIGINT, handle_sig);
	signal(SIGCHLD, SIG_IGN);

	esl_global_set_default_logger(7);
	esl_listen("localhost", 8040, mycallback, NULL, &server_sock);

	return 0;
}
