/*****************************************************************************\
**                                                                           **
** Linux Call Router                                                         **
**                                                                           **
**---------------------------------------------------------------------------**
** Copyright: Andreas Eversberg                                              **
**                                                                           **
** join functions                                                            **
**                                                                           **
\*****************************************************************************/ 

#include "main.h"
//#define __u8 unsigned char
//#define __u16 unsigned short
//#define __u32 unsigned int


/* notify endpoint about state change (if any) */
static int notify_state_change(int join_id, int epoint_id, int old_state, int new_state)
{
	int notify_off = 0, notify_on = 0;
	struct lcr_msg *message;

	if (old_state == new_state)
		return(old_state);

	switch(old_state) {
		case NOTIFY_STATE_ACTIVE:
		switch(new_state) {
			case NOTIFY_STATE_HOLD:
			notify_on = INFO_NOTIFY_REMOTE_HOLD;
			break;
			case NOTIFY_STATE_SUSPEND:
			notify_on = INFO_NOTIFY_USER_SUSPENDED;
			break;
			case NOTIFY_STATE_CONFERENCE:
			notify_on = INFO_NOTIFY_CONFERENCE_ESTABLISHED;
			break;
		}
		break;

		case NOTIFY_STATE_HOLD:
		switch(new_state) {
			case NOTIFY_STATE_ACTIVE:
			notify_off = INFO_NOTIFY_REMOTE_RETRIEVAL;
			break;
			case NOTIFY_STATE_SUSPEND:
			notify_off = INFO_NOTIFY_REMOTE_RETRIEVAL;
			notify_on = INFO_NOTIFY_USER_SUSPENDED;
			break;
			case NOTIFY_STATE_CONFERENCE:
			notify_off = INFO_NOTIFY_REMOTE_RETRIEVAL;
			notify_on = INFO_NOTIFY_CONFERENCE_ESTABLISHED;
			break;
		}
		break;

		case NOTIFY_STATE_SUSPEND:
		switch(new_state) {
			case NOTIFY_STATE_ACTIVE:
			notify_off = INFO_NOTIFY_USER_RESUMED;
			break;
			case NOTIFY_STATE_HOLD:
			notify_off = INFO_NOTIFY_USER_RESUMED;
			notify_on = INFO_NOTIFY_REMOTE_HOLD;
			break;
			case NOTIFY_STATE_CONFERENCE:
			notify_off = INFO_NOTIFY_USER_RESUMED;
			notify_on = INFO_NOTIFY_CONFERENCE_ESTABLISHED;
			break;
		}
		break;

		case NOTIFY_STATE_CONFERENCE:
		switch(new_state) {
			case NOTIFY_STATE_ACTIVE:
			notify_off = INFO_NOTIFY_CONFERENCE_DISCONNECTED;
			break;
			case NOTIFY_STATE_HOLD:
			notify_off = INFO_NOTIFY_CONFERENCE_DISCONNECTED;
			notify_on = INFO_NOTIFY_REMOTE_HOLD;
			break;
			case NOTIFY_STATE_SUSPEND:
			notify_off = INFO_NOTIFY_CONFERENCE_DISCONNECTED;
			notify_on = INFO_NOTIFY_USER_SUSPENDED;
			break;
		}
		break;
	}

	if (join_id && notify_off) {
		message = message_create(join_id, epoint_id, JOIN_TO_EPOINT, MESSAGE_NOTIFY);
		message->param.notifyinfo.notify = notify_off;
		message_put(message);
	}

	if (join_id && notify_on) {
		message = message_create(join_id, epoint_id, JOIN_TO_EPOINT, MESSAGE_NOTIFY);
		message->param.notifyinfo.notify = notify_on;
		message_put(message);
	}

	return(new_state);
}


/* debug function for join */
void joinpbx_debug(class JoinPBX *joinpbx, const char *function)
{
	struct join_relation *relation;
	struct port_list *portlist;
	class Endpoint *epoint;
	class Port *port;
	char buffer[512];

	if (!(options.deb & DEBUG_JOIN))
		return;

	PDEBUG(DEBUG_JOIN, "join(%d) start (called from %s)\n", joinpbx->j_serial, function);

	relation = joinpbx->j_relation;

	if (!relation)
		PDEBUG(DEBUG_JOIN, "join has no relations\n");
	while(relation) {
		epoint = find_epoint_id(relation->epoint_id);
		if (!epoint) {
			PDEBUG(DEBUG_JOIN, "warning: relations epoint id=%d doesn't exists!\n", relation->epoint_id);
			relation = relation->next;
			continue;
		}
		buffer[0] = '\0';
		UPRINT(strchr(buffer,0), "*** ep%d", relation->epoint_id);
		UPRINT(strchr(buffer,0), " ifs=");
		portlist = epoint->ep_portlist;
		while(portlist) {
			port = find_port_id(portlist->port_id);
			if (port)
				UPRINT(strchr(buffer,0), "%s,", port->p_name);
			else
				UPRINT(strchr(buffer,0), "<port %d doesn't exist>,", portlist->port_id);
			portlist = portlist->next;
		}
//		UPRINT(strchr(buffer,0), " endpoint=%d on=%s hold=%s", epoint->ep_serial, (epoint->ep_join_id==joinpbx->j_serial)?"yes":"no", (epoint->get_hold_id()==joinpbx->j_serial)?"yes":"no");
		UPRINT(strchr(buffer,0), " endpoint=%d on=%s", epoint->ep_serial, (epoint->ep_join_id==joinpbx->j_serial)?"yes":"no");
		switch(relation->type) {
			case RELATION_TYPE_CALLING:
			UPRINT(strchr(buffer,0), " type=CALLING");
			break;
			case RELATION_TYPE_SETUP:
			UPRINT(strchr(buffer,0), " type=SETUP");
			break;
			case RELATION_TYPE_CONNECT:
			UPRINT(strchr(buffer,0), " type=CONNECT");
			break;
			default:
			UPRINT(strchr(buffer,0), " type=unknown");
			break;
		}
		if (relation->channel_state)
			UPRINT(strchr(buffer,0), " channel=CONNECT");
		else
			UPRINT(strchr(buffer,0), " channel=HOLD");
		switch(relation->tx_state) {
			case NOTIFY_STATE_ACTIVE:
			UPRINT(strchr(buffer,0), " tx_state=ACTIVE");
			break;
			case NOTIFY_STATE_HOLD:
			UPRINT(strchr(buffer,0), " tx_state=HOLD");
			break;
			case NOTIFY_STATE_SUSPEND:
			UPRINT(strchr(buffer,0), " tx_state=SUSPEND");
			break;
			case NOTIFY_STATE_CONFERENCE:
			UPRINT(strchr(buffer,0), " tx_state=CONFERENCE");
			break;
			default:
			UPRINT(strchr(buffer,0), " tx_state=unknown");
			break;
		}
		switch(relation->rx_state) {
			case NOTIFY_STATE_ACTIVE:
			UPRINT(strchr(buffer,0), " rx_state=ACTIVE");
			break;
			case NOTIFY_STATE_HOLD:
			UPRINT(strchr(buffer,0), " rx_state=HOLD");
			break;
			case NOTIFY_STATE_SUSPEND:
			UPRINT(strchr(buffer,0), " rx_state=SUSPEND");
			break;
			case NOTIFY_STATE_CONFERENCE:
			UPRINT(strchr(buffer,0), " rx_state=CONFERENCE");
			break;
			default:
			UPRINT(strchr(buffer,0), " rx_state=unknown");
			break;
		}
		PDEBUG(DEBUG_JOIN, "%s\n", buffer);
		relation = relation->next;
	}

	PDEBUG(DEBUG_JOIN, "end\n");
}

int update_bridge(struct lcr_work *work, void *instance, int index);

/*
 * constructor for a new join 
 * the join will have a relation to the calling endpoint
 */
JoinPBX::JoinPBX(class Endpoint *epoint) : Join()
{
	struct join_relation *relation;
//	char filename[256];

	if (!epoint)
		FATAL("epoint is NULL.\n");

	PDEBUG(DEBUG_JOIN, "creating new join and connecting it to the endpoint.\n");

	j_type = JOIN_TYPE_PBX;
	j_caller[0] = '\0';
	j_caller_id[0] = '\0';
	j_dialed[0] = '\0';
	j_todial[0] = '\0';
	j_pid = getpid();
	j_partyline = 0;
	j_partyline_jingle = 0;
	j_3pty = 0;
	j_multicause = 0;
	j_multilocation = 0;
	memset(&j_updatebridge, 0, sizeof(j_updatebridge));
	add_work(&j_updatebridge, update_bridge, this, 0);

	/* initialize a relation only to the calling interface */
	relation = j_relation = (struct join_relation *)MALLOC(sizeof(struct join_relation));
	cmemuse++;
	relation->type = RELATION_TYPE_CALLING;
	relation->channel_state = 0; /* audio is assumed on a new join */
	relation->tx_state = NOTIFY_STATE_ACTIVE; /* new joins always assumed to be active */
	relation->rx_state = NOTIFY_STATE_ACTIVE; /* new joins always assumed to be active */
	relation->epoint_id = epoint->ep_serial;


	if (options.deb & DEBUG_JOIN)
		joinpbx_debug(this, "JoinPBX::Constructor(new join)");
}


/*
 * join descructor
 */
JoinPBX::~JoinPBX()
{
	struct join_relation *relation, *rtemp;

	relation = j_relation;
	while(relation) {
		rtemp = relation->next;
		FREE(relation, sizeof(struct join_relation));
		cmemuse--;
		relation = rtemp;
	}

	/* remove 3PTY from other join */
	if (j_3pty) {
		class Join *join;
		class JoinPBX *joinpbx;

		join = find_join_id(j_3pty);
		if (join && join->j_type == JOIN_TYPE_PBX) {
			joinpbx = (class JoinPBX *)join;
			joinpbx->j_3pty = 0;
			trigger_work(&joinpbx->j_updatebridge);
		}
	}

	del_work(&j_updatebridge);
}


/* bridge sets the audio flow of all bchannels assiociated to 'this' join
 * also it changes and notifies active/hold/conference states
 */
int update_bridge(struct lcr_work *work, void *instance, int index)
{
	 class JoinPBX *joinpbx = (class JoinPBX *)instance;

	 joinpbx->bridge();

	 return 0;
}

void JoinPBX::bridge(void)
{
	struct join_relation *relation;
	struct lcr_msg *message;
	int numconnect = 0, relations = 0;
	class Endpoint *epoint;
	struct port_list *portlist;
	class Port *port;
	unsigned int bridge_id;
	class Join *join_3pty;
	class JoinPBX *joinpbx_3pty;
#ifdef DEBUG_COREBRIDGE
	int allmISDN = 0; // never set for debug purpose
#else
	int allmISDN = 1; // set until a non-mISDN relation is found
#endif

	/* bridge id is the serial of join
	 * if we have a 3pty with another join, we always use the lowest brigde id.
	 * this way we use common ids, so both joins share same bridge */
	if (j_3pty && j_3pty < j_serial)
		bridge_id = j_3pty;
	else
		bridge_id = j_serial;

	relation = j_relation;
	while(relation) {
		/* count all relations */
		relations++;

		/* check for relation's objects */
		epoint = find_epoint_id(relation->epoint_id);
		if (!epoint) {
			PERROR("software error: relation without existing endpoints.\n");
			relation = relation->next;
			continue;
		}
		portlist = epoint->ep_portlist;
		if (!portlist) {
			PDEBUG(DEBUG_JOIN, "join%d ignoring relation without port object.\n", j_serial);
//#warning testing: keep on hold until single audio stream available
			relation->channel_state = 0;
			relation = relation->next;
			continue;
		}
		if (portlist->next) {
			PDEBUG(DEBUG_JOIN, "join%d ignoring relation with ep%d due to port_list.\n", j_serial, epoint->ep_serial);
//#warning testing: keep on hold until single audio stream available
			relation->channel_state = 0;
			relation = relation->next;
			continue;
		}
		port = find_port_id(portlist->port_id);
		if (!port) {
			PDEBUG(DEBUG_JOIN, "join%d ignoring relation without existing port object.\n", j_serial);
			relation = relation->next;
			continue;
		}
		if ((port->p_type&PORT_CLASS_MASK)!=PORT_CLASS_mISDN) {
			PDEBUG(DEBUG_JOIN, "join%d ignoring relation ep%d because it's port is not mISDN.\n", j_serial, epoint->ep_serial);
			if (allmISDN) {
				PDEBUG(DEBUG_JOIN, "join%d not all endpoints are mISDN.\n", j_serial);
				allmISDN = 0;
			}
			relation = relation->next;
			continue;
		}
#ifdef WITH_VOOTP
		if (port->p_vootp) {
			PDEBUG(DEBUG_JOIN, "join%d ignoring relation ep%d because it's port uses VoOTP.\n", j_serial, epoint->ep_serial);
			if (allmISDN) {
				PDEBUG(DEBUG_JOIN, "join%d not all endpoints can support mISDN bridging.\n", j_serial);
				allmISDN = 0;
			}
			relation = relation->next;
			continue;
		}
#endif

		relation = relation->next;
	}

	/* check if 3pty members have no mISDN, so bridging via mISDN/lcr will be selected correctly */
	join_3pty = find_join_id(j_3pty);
	if (join_3pty && join_3pty->j_type == JOIN_TYPE_PBX) {
		joinpbx_3pty = (class JoinPBX *)join_3pty;
		relation = joinpbx_3pty->j_relation;
		while(relation) {

#if 0
no need to count, because j_3pty is taken into account below when checking relations
			/* count all relations */
			relations++;
#endif

			/* check for relation's objects */
			epoint = find_epoint_id(relation->epoint_id);
			if (!epoint) {
				PERROR("software error: relation without existing endpoints.\n");
				relation = relation->next;
				continue;
			}
			portlist = epoint->ep_portlist;
			if (!portlist) {
				PDEBUG(DEBUG_JOIN, "other 3pty join %d: ignoring relation without port object.\n", joinpbx_3pty->j_serial);
//#warning testing: keep on hold until single audio stream available
				relation->channel_state = 0;
				relation = relation->next;
				continue;
			}
			if (portlist->next) {
				PDEBUG(DEBUG_JOIN, "other 3pty join %d: ignoring relation with ep%d due to port_list.\n", joinpbx_3pty->j_serial, epoint->ep_serial);
//#warning testing: keep on hold until single audio stream available
				relation->channel_state = 0;
				relation = relation->next;
				continue;
			}
			port = find_port_id(portlist->port_id);
			if (!port) {
				PDEBUG(DEBUG_JOIN, "other 3pty join %d: ignoring relation without existing port object.\n", joinpbx_3pty->j_serial);
				relation = relation->next;
				continue;
			}
			if ((port->p_type&PORT_CLASS_MASK)!=PORT_CLASS_mISDN) {
				PDEBUG(DEBUG_JOIN, "other 3pty join %d: ignoring relation ep%d because it's port is not mISDN.\n", joinpbx_3pty->j_serial, epoint->ep_serial);
				if (allmISDN) {
					PDEBUG(DEBUG_JOIN, "other 3pty join %d: not all endpoints are mISDN.\n", joinpbx_3pty->j_serial);
					allmISDN = 0;
				}
				relation = relation->next;
				continue;
			}
#ifdef WITH_VOOTP
			if (port->p_vootp) {
				PDEBUG(DEBUG_JOIN, "join%d ignoring relation ep%d because it's port uses VoOTP.\n", joinpbx_3pty->j_serial, epoint->ep_serial);
				if (allmISDN) {
					PDEBUG(DEBUG_JOIN, "join%d not all endpoints can support mISDN bridging.\n", joinpbx_3pty->j_serial);
					allmISDN = 0;
				}
				relation = relation->next;
				continue;
			}
#endif

			relation = relation->next;
		}
	}

	PDEBUG(DEBUG_JOIN, "join%d members=%d %s\n", j_serial, relations, (allmISDN)?"(all are mISDN-members)":"(not all are mISDN-members)");
	/* we notify all relations about rxdata. */
	relation = j_relation;
	while(relation) {
		/* count connected relations */
		if ((relation->channel_state == 1)
		 && (relation->rx_state != NOTIFY_STATE_SUSPEND)
		 && (relation->rx_state != NOTIFY_STATE_HOLD))
			numconnect ++;

		/* remove unconnected parties from conference, also remove remotely disconnected parties so conference will not be disturbed. */

		/* mISDN */
		if (relation->channel_state == 1
		 && relation->rx_state != NOTIFY_STATE_HOLD
		 && relation->rx_state != NOTIFY_STATE_SUSPEND
		 && relations>1 // no conf with one member
		 && allmISDN) { // no conf if any member is not mISDN
			message = message_create(j_serial, relation->epoint_id, JOIN_TO_EPOINT, MESSAGE_mISDNSIGNAL);
			message->param.mISDNsignal.message = mISDNSIGNAL_CONF;
			message->param.mISDNsignal.conf = (bridge_id << 16) | j_pid;
			PDEBUG(DEBUG_JOIN, "join%d EP%d +on+ id: 0x%08x\n", j_serial, relation->epoint_id, message->param.mISDNsignal.conf);
			message_put(message);
		} else {
			message = message_create(j_serial, relation->epoint_id, JOIN_TO_EPOINT, MESSAGE_mISDNSIGNAL);
			message->param.mISDNsignal.message = mISDNSIGNAL_CONF;
			message->param.mISDNsignal.conf = 0;
			PDEBUG(DEBUG_JOIN, "join%d EP%d +off+ id: 0x%08x\n", j_serial, relation->epoint_id, message->param.mISDNsignal.conf);
			message_put(message);
		}

		/* core bridge */
		if (relation->channel_state == 1
		 && relation->rx_state != NOTIFY_STATE_HOLD
		 && relation->rx_state != NOTIFY_STATE_SUSPEND
		 && relations>1 // no bridge with one member
		 && !allmISDN) { // no bridge if all members are mISDN
			message = message_create(j_serial, relation->epoint_id, JOIN_TO_EPOINT, MESSAGE_BRIDGE);
			message->param.bridge_id = bridge_id;
			PDEBUG(DEBUG_JOIN, "join%u EP%u requests bridge=%u\n", j_serial, relation->epoint_id, bridge_id);
			message_put(message);
		} else {
			message = message_create(j_serial, relation->epoint_id, JOIN_TO_EPOINT, MESSAGE_BRIDGE);
			message->param.bridge_id = 0;
			PDEBUG(DEBUG_JOIN, "join%u EP%u drop bridge=%u\n", j_serial, relation->epoint_id, bridge_id);
			message_put(message);
		}

		relation = relation->next;
	}

	/* two people just exchange their states */
	if (!j_3pty && relations==2 && !j_partyline) {
		PDEBUG(DEBUG_JOIN, "join%d 2 relations / no partyline\n", j_serial);
		relation = j_relation;
		relation->tx_state = notify_state_change(j_serial, relation->epoint_id, relation->tx_state, relation->next->rx_state);
		relation->next->tx_state = notify_state_change(j_serial, relation->next->epoint_id, relation->next->tx_state, relation->rx_state);
	} else
	/* one member in a join, so we put her on hold */
	if (!j_3pty && (relations==1 || numconnect==1)/* && !j_partyline_jingle*/) {
		PDEBUG(DEBUG_JOIN, "join%d 1 member or only 1 connected, put on hold\n", j_serial);
		relation = j_relation;
		while(relation) {
			if ((relation->channel_state == 1)
			 && (relation->rx_state != NOTIFY_STATE_SUSPEND)
			 && (relation->rx_state != NOTIFY_STATE_HOLD))
				relation->tx_state = notify_state_change(j_serial, relation->epoint_id, relation->tx_state, NOTIFY_STATE_HOLD);
			relation = relation->next;
		}
	} else {
	/* if conference/partyline (or more than two members and more than one is connected), so we set conference state */ 
		PDEBUG(DEBUG_JOIN, "join%d %d members, %d connected, signal conference\n", j_serial, relations, numconnect);
		relation = j_relation;
		while(relation) {
			if ((relation->channel_state == 1)
			 && (relation->rx_state != NOTIFY_STATE_SUSPEND)
			 && (relation->rx_state != NOTIFY_STATE_HOLD))
				relation->tx_state = notify_state_change(j_serial, relation->epoint_id, relation->tx_state, NOTIFY_STATE_CONFERENCE);
			relation = relation->next;
		}
	}
}

/* release join from endpoint
 * if the join has two relations, all relations are freed and the join will be
 * destroyed
 * on outgoing relations, the cause is collected, if not connected
 * returns if join has been destroyed
 */
int JoinPBX::release(struct join_relation *relation, int location, int cause)
{
	struct join_relation *reltemp, **relationpointer;
	struct lcr_msg *message;
	class Join *join;
	int destroy = 0;

	/* remove from bridge */
	if (relation->channel_state != 0) {
		relation->channel_state = 0;
		trigger_work(&j_updatebridge);
		// note: if join is not released, bridge must be updated
	}

	/* detach given interface */
	reltemp = j_relation;
	relationpointer = &j_relation;
	while(reltemp) {
		/* endpoint of function call */
		if (relation == reltemp)
			break;
		relationpointer = &reltemp->next;
		reltemp = reltemp->next;
	}
	if (!reltemp)
		FATAL("relation not in list of our relations. this must not happen.\n");
//printf("releasing relation %d\n", reltemp->epoint_id);
	*relationpointer = reltemp->next;
	FREE(reltemp, sizeof(struct join_relation));
	cmemuse--;
	relation = reltemp = NULL; // just in case of reuse fault;

	/* if no more relation */
	if (!j_relation) {
		PDEBUG(DEBUG_JOIN, "join is completely removed.\n");
		/* there is no more endpoint related to the join */
		destroy = 1;
		delete this;
		// end of join object!
		PDEBUG(DEBUG_JOIN, "join completely removed!\n");
	} else
	/* if join is a party line */
	if (j_partyline) {
		PDEBUG(DEBUG_JOIN, "join is a conference room, so we keep it alive until the last party left.\n");
	} else
	/* if only one relation left */
	if (!j_relation->next) {
		PDEBUG(DEBUG_JOIN, "join has one relation left, so we send it a release with the given cause %d.\n", cause);
		message = message_create(j_serial, j_relation->epoint_id, JOIN_TO_EPOINT, MESSAGE_RELEASE);
		message->param.disconnectinfo.cause = cause;
		message->param.disconnectinfo.location = location;
		message_put(message);
		destroy = 1;
		delete this;
		// end of join object!
		PDEBUG(DEBUG_JOIN, "join completely removed!\n");
	}

	join = join_first;
	while(join) {
		if (options.deb & DEBUG_JOIN && join->j_type==JOIN_TYPE_PBX)
			joinpbx_debug((class JoinPBX *)join, "join_release{all joins left}");
		join = join->next;
	}
	PDEBUG(DEBUG_JOIN, "join_release(): ended.\n");
	return(destroy);
}

/* count number of relations in a join
 */
int joinpbx_countrelations(unsigned int join_id)
{
	struct join_relation *relation;
	int i;
	class Join *join;
	class JoinPBX *joinpbx;

	join = find_join_id(join_id);

	if (!join)
		return(0);

	if (join->j_type != JOIN_TYPE_PBX)
		return(0);
	joinpbx = (class JoinPBX *)join;

	i = 0;
	relation = joinpbx->j_relation;
	while(relation) {
		i++;
		relation = relation->next;
	}

	return(i);
}

/* check if one is calling and all other relations are setup-realations */
int joinpbx_onecalling_othersetup(struct join_relation *relation)
{
	int calling = 0, other = 0;

	while(relation) {
		switch(relation->type) {
		case RELATION_TYPE_CALLING:
			calling++;
			break;
		case RELATION_TYPE_SETUP:
			break;
		default:
			other++;
			break;
		}

		relation = relation->next;
	}

	if (calling == 1 && other == 0)
		return(1);
	return(0);
}

void JoinPBX::remove_relation(struct join_relation *relation)
{
	struct join_relation *temp, **tempp;

	if (!relation)
		return;

	temp = j_relation;
	tempp = &j_relation;
	while(temp) {
		if (temp == relation)
			break;
		tempp = &temp->next;
		temp = temp->next;
	}
	if (!temp) {
		PERROR("relation not in join.\n");
		return;
	}

	PDEBUG(DEBUG_JOIN, "removing relation.\n");
	*tempp = relation->next;
	FREE(temp, sizeof(struct join_relation));
	cmemuse--;
}	


struct join_relation *JoinPBX::add_relation(void)
{
	struct join_relation *relation;

	if (!j_relation) {
		PERROR("there is no first relation to this join\n");
		return(NULL);
	}
	relation = j_relation;
	while(relation->next)
		relation = relation->next;

	relation->next = (struct join_relation *)MALLOC(sizeof(struct join_relation));
	cmemuse++;
	/* the record pointer is set at the first time the data is received for the relation */

//	if (options.deb & DEBUG_JOIN)
//		joinpbx_debug(join, "add_relation");
	return(relation->next);
}

/* epoint sends a message to a join
 *
 */
void JoinPBX::message_epoint(unsigned int epoint_id, int message_type, union parameter *param)
{
	class Join *cl;
	struct join_relation *relation, *reltemp;
	int num;
	int new_state;
	struct lcr_msg *message;
//	int size, writesize, oldpointer;
	char *number, *numbers;

	if (!epoint_id) {
		PERROR("software error, epoint == NULL\n");
		return;
	}

//	if (options.deb & DEBUG_JOIN) {
//		PDEBUG(DEBUG_JOIN, "message %d received from ep%d.\n", message, epoint->ep_serial);
//		joinpbx_debug(join,"Join::message_epoint");
//	}
	if (options.deb & DEBUG_JOIN) {
		if (message_type) {
			cl = join_first;
			while(cl) {
				if (cl->j_type == JOIN_TYPE_PBX)
					joinpbx_debug((class JoinPBX *)cl, "Join::message_epoint{all joins before processing}");
				cl = cl->next;
			}
		}
	}

	/* check relation */
	relation = j_relation;
	while(relation) {
		if (relation->epoint_id == epoint_id)
			break;
		relation = relation->next;
	}
	if (!relation) {
		PDEBUG(DEBUG_JOIN, "no relation back to the endpoint found, ignoring (join=%d, endpoint=%d)\n", j_serial, epoint_id);
		return;
	}

	/* count relations */
	num=joinpbx_countrelations(j_serial);

	/* process party line */
	if (message_type == MESSAGE_SETUP) if (param->setup.partyline && !j_partyline) {
		j_partyline = param->setup.partyline;
		j_partyline_jingle = param->setup.partyline_jingle;
	}
	if (j_partyline) {
		switch(message_type) {
			case MESSAGE_SETUP:
			PDEBUG(DEBUG_JOIN, "respsone with connect in partyline mode.\n");
			relation->type = RELATION_TYPE_CONNECT;
			message = message_create(j_serial, epoint_id, JOIN_TO_EPOINT, MESSAGE_CONNECT);
			SPRINT(message->param.connectinfo.id, "%d", j_partyline);
			message->param.connectinfo.ntype = INFO_NTYPE_UNKNOWN;
			message_put(message);
			trigger_work(&j_updatebridge);
			if (j_partyline_jingle)
			       play_jingle(1);
			break;
			
			case MESSAGE_AUDIOPATH:
			PDEBUG(DEBUG_JOIN, "join received channel message: %d.\n", param->audiopath);
			if (relation->channel_state != param->audiopath) {
				relation->channel_state = param->audiopath;
				trigger_work(&j_updatebridge);
				if (options.deb & DEBUG_JOIN)
					joinpbx_debug(this, "Join::message_epoint{after setting new channel state}");
			}
			break;

			/* track notify */
			case MESSAGE_NOTIFY:
			switch(param->notifyinfo.notify) {
				case INFO_NOTIFY_USER_SUSPENDED:
				case INFO_NOTIFY_USER_RESUMED:
				case INFO_NOTIFY_REMOTE_HOLD:
				case INFO_NOTIFY_REMOTE_RETRIEVAL:
				case INFO_NOTIFY_CONFERENCE_ESTABLISHED:
				case INFO_NOTIFY_CONFERENCE_DISCONNECTED:
				new_state = track_notify(relation->rx_state, param->notifyinfo.notify);
				if (new_state != relation->rx_state) {
					relation->rx_state = new_state;
					trigger_work(&j_updatebridge);
					if (options.deb & DEBUG_JOIN)
						joinpbx_debug(this, "Join::message_epoint{after setting new rx state}");
				}
				break;
			}
			break;

			case MESSAGE_DISCONNECT:
			PDEBUG(DEBUG_JOIN, "releasing after receiving disconnect, because join in partyline mode.\n");
			message = message_create(j_serial, epoint_id, JOIN_TO_EPOINT, MESSAGE_RELEASE);
			message->param.disconnectinfo.cause = CAUSE_NORMAL;
			message->param.disconnectinfo.location = LOCATION_PRIVATE_LOCAL;
			message_put(message);
			// fall through

			case MESSAGE_RELEASE:
			PDEBUG(DEBUG_JOIN, "releasing from join\n");
			release(relation, 0, 0);
			if (j_partyline_jingle)
			       play_jingle(0);
			break;

			default:
			PDEBUG(DEBUG_JOIN, "ignoring message, because join in partyline mode.\n");
		}
		return;
	}


	/* process messages */
	switch(message_type) {
		/* process audio path message */
		case MESSAGE_AUDIOPATH:
		PDEBUG(DEBUG_JOIN, "join received channel message: audiopath=%d, current relation's channel_state=%d\n", param->audiopath, relation->channel_state);
		if (relation->channel_state != param->audiopath) {
			relation->channel_state = param->audiopath;
			trigger_work(&j_updatebridge);
			if (options.deb & DEBUG_JOIN)
				joinpbx_debug(this, "Join::message_epoint{after setting new channel state}");
		}
		return;

		case MESSAGE_UPDATEBRIDGE:
			trigger_work(&j_updatebridge);
			joinpbx_debug(this, "Join::message_epoint{bridge is updated due to request from mISDN port}");
			break;

		/* track notify */
		case MESSAGE_NOTIFY:
		switch(param->notifyinfo.notify) {
			case INFO_NOTIFY_USER_SUSPENDED:
			case INFO_NOTIFY_USER_RESUMED:
			case INFO_NOTIFY_REMOTE_HOLD:
			case INFO_NOTIFY_REMOTE_RETRIEVAL:
			case INFO_NOTIFY_CONFERENCE_ESTABLISHED:
			case INFO_NOTIFY_CONFERENCE_DISCONNECTED:
			new_state = track_notify(relation->rx_state, param->notifyinfo.notify);
			if (new_state != relation->rx_state) {
				relation->rx_state = new_state;
				trigger_work(&j_updatebridge);
				if (options.deb & DEBUG_JOIN)
					joinpbx_debug(this, "Join::message_epoint{after setting new rx state}");
			}
			break;

			default:
			/* send notification to all other endpoints */
			reltemp = j_relation;
			while(reltemp) {
				if (reltemp->epoint_id!=epoint_id && reltemp->epoint_id) {
					message = message_create(j_serial, reltemp->epoint_id, JOIN_TO_EPOINT, MESSAGE_NOTIFY);
					memcpy(&message->param, param, sizeof(union parameter));
					message_put(message);
				}
				reltemp = reltemp->next;
			}
		}
		return;

		/* relations sends a connect */
		case MESSAGE_CONNECT:
		/* outgoing setup type becomes connected */
		if (relation->type == RELATION_TYPE_SETUP)
			relation->type = RELATION_TYPE_CONNECT;
		/* release other relations in setup state */
		release_again:
		reltemp = j_relation;
		while(reltemp) {
//printf("connect, checking relation %d\n", reltemp->epoint_id);
			if (reltemp->type == RELATION_TYPE_SETUP) {
//printf("relation %d is of type setup, releasing\n", reltemp->epoint_id);
				/* send release to endpoint */
				message = message_create(j_serial, reltemp->epoint_id, JOIN_TO_EPOINT, MESSAGE_RELEASE);
				message->param.disconnectinfo.cause = CAUSE_NONSELECTED;
				message->param.disconnectinfo.location = LOCATION_PRIVATE_LOCAL;
				message_put(message);

				if (release(reltemp, LOCATION_PRIVATE_LOCAL, CAUSE_NORMAL)) // dummy cause, should not be used, since calling and connected endpoint still exist afterwards.
					return; // must return, because join IS destroyed
				goto release_again;
			}
			if (reltemp->type == RELATION_TYPE_CALLING)
				reltemp->type = RELATION_TYPE_CONNECT;
			reltemp = reltemp->next;
		}
		break; // continue with our message

		/* release is sent by endpoint */
		case MESSAGE_RELEASE:
		switch(relation->type) {
			case RELATION_TYPE_SETUP: /* by called */
			/* collect cause and send collected cause */
			collect_cause(&j_multicause, &j_multilocation, param->disconnectinfo.cause, param->disconnectinfo.location);
			if (j_multicause)
				release(relation, j_multilocation, j_multicause);
			else
				release(relation, LOCATION_PRIVATE_LOCAL, CAUSE_UNSPECIFIED);
			break;

			case RELATION_TYPE_CALLING: /* by calling */
			/* remove us, if we don't have a called releation yet */
			if (!j_relation->next) {
				release(j_relation, LOCATION_PRIVATE_LOCAL, CAUSE_NORMAL);
				return; // must return, because join IS destroyed
			}
			/* in a conf, we don't kill the other members */
			if (num > 2 && !joinpbx_onecalling_othersetup(j_relation)) {
				release(relation, 0, 0);
				return;
			}
			/* remove all relations that are of called type */
			release_again2:
			reltemp = j_relation;
			while(reltemp) {
				if (reltemp->type == RELATION_TYPE_SETUP) {
					/* send release to endpoint */
					message = message_create(j_serial, reltemp->epoint_id, JOIN_TO_EPOINT, message_type);
					memcpy(&message->param, param, sizeof(union parameter));
					message_put(message);

					if (release(reltemp, LOCATION_PRIVATE_LOCAL, CAUSE_NORMAL))
						return; // must return, because join IS destroyed
					goto release_again2;
				}
				reltemp = reltemp->next;
			}
			PERROR("we are still here, this should not happen\n");
			break;

			default: /* by connected */
			/* send current cause */
			release(relation, param->disconnectinfo.location, param->disconnectinfo.cause);
		}
		return; // must return, because join may be destroyed
	}

	/* check number of relations */
	if (num > 2 && !joinpbx_onecalling_othersetup(j_relation) && message_type != MESSAGE_CONNECT) {
		PDEBUG(DEBUG_JOIN, "we are in a conference, so we ignore the messages, except MESSAGE_CONNECT.\n");
		return;
	}

	/* if join has no other relation, we process the setup message */
	if (num == 1) {
		switch(message_type) {
			case MESSAGE_SETUP:
			if (param->setup.dialinginfo.itype == INFO_ITYPE_ISDN_EXTENSION) {
				/* in case of keypad */
				numbers = param->setup.dialinginfo.keypad;
				if (numbers[0]) {
					while((number = strsep(&numbers, ","))) {
						if (out_setup(epoint_id, message_type, param, NULL, number))
							return; // join destroyed
					}
					/* after keypad finish dialing */
					break;
				}
				/* dialed number */
				numbers = param->setup.dialinginfo.id;
				while((number = strsep(&numbers, ","))) {
					if (out_setup(epoint_id, message_type, param, number, NULL))
						return; // join destroyed
				}
				break;
			}
			if (out_setup(epoint_id, message_type, param, param->setup.dialinginfo.id, param->setup.dialinginfo.keypad))
				return; // join destroyed
			break;

			default:
			PDEBUG(DEBUG_JOIN, "no need to send a message because there is no other endpoint than the calling one.\n");
		}
	} else {
		/* sending message to other relation(s) */
		relation = j_relation;
		while(relation) {
			if (relation->epoint_id != epoint_id) {
				PDEBUG(DEBUG_JOIN, "sending message ep%ld -> ep%ld.\n", epoint_id, relation->epoint_id);
				message = message_create(j_serial, relation->epoint_id, JOIN_TO_EPOINT, message_type);
				memcpy(&message->param, param, sizeof(union parameter));
				message_put(message);
				PDEBUG(DEBUG_JOIN, "message sent.\n");
			}
			relation = relation->next;
		}
	}
}


int track_notify(int oldstate, int notify)
{
	int newstate = oldstate;

	switch(notify) {
		case INFO_NOTIFY_USER_RESUMED:
		case INFO_NOTIFY_REMOTE_RETRIEVAL:
		case INFO_NOTIFY_CONFERENCE_DISCONNECTED:
		case INFO_NOTIFY_RESERVED_CT_1:
		case INFO_NOTIFY_RESERVED_CT_2:
		case INFO_NOTIFY_CALL_IS_DIVERTING:
		newstate = NOTIFY_STATE_ACTIVE;
		break;

		case INFO_NOTIFY_USER_SUSPENDED:
		newstate = NOTIFY_STATE_SUSPEND;
		break;

		case INFO_NOTIFY_REMOTE_HOLD:
		newstate = NOTIFY_STATE_HOLD;
		break;

		case INFO_NOTIFY_CONFERENCE_ESTABLISHED:
		newstate = NOTIFY_STATE_CONFERENCE;
		break;
	}

	return(newstate);
}


/*
 * setup to exactly one endpoint
 * if it fails, the calling endpoint is released.
 * if other outgoing endpoints already exists, they are release as well.
 * note: if this functions fails, it will destroy its own join object!
 */
int JoinPBX::out_setup(unsigned int epoint_id, int message_type, union parameter *param, char *newnumber, char *newkeypad)
{
	struct join_relation *relation;
	struct lcr_msg *message;
	class Endpoint *epoint;

	PDEBUG(DEBUG_JOIN, "no endpoint found, so we will create an endpoint and send the setup message we have.\n");
	/* create a new relation */
	if (!(relation=add_relation()))
		FATAL("No memory for relation.\n");
	relation->type = RELATION_TYPE_SETUP;
	relation->channel_state = 0; /* audio is assumed on a new join */
	relation->tx_state = NOTIFY_STATE_ACTIVE; /* new joins always assumed to be active */
	relation->rx_state = NOTIFY_STATE_ACTIVE; /* new joins always assumed to be active */
	/* create a new endpoint */
	epoint = new Endpoint(0, j_serial);
	if (!epoint)
		FATAL("No memory for Endpoint instance\n");
	epoint->ep_app = new_endpointapp(epoint, 1, EAPP_TYPE_PBX); // outgoing
	relation->epoint_id = epoint->ep_serial;
	/* send setup message to new endpoint */
//printf("JOLLY DEBUG: %d\n",join_countrelations(j_serial));
//i			if (options.deb & DEBUG_JOIN)
//				joinpbx_debug(join, "Join::message_epoint");
	message = message_create(j_serial, relation->epoint_id, JOIN_TO_EPOINT, message_type);
	memcpy(&message->param, param, sizeof(union parameter));
	if (newnumber)
		SCPY(message->param.setup.dialinginfo.id, newnumber);
	else
		message->param.setup.dialinginfo.id[0] = '\0';
	if (newkeypad)
		SCPY(message->param.setup.dialinginfo.keypad, newkeypad);
	else
		message->param.setup.dialinginfo.keypad[0] = '\0';
	PDEBUG(DEBUG_JOIN, "setup message sent to ep %d with number='%s' keypad='%s'.\n", relation->epoint_id, message->param.setup.dialinginfo.id, message->param.setup.dialinginfo.keypad);
	message_put(message);
	return(0);
}


/* send play message to all members to play join/release jingle */
void JoinPBX::play_jingle(int in)
{
	struct join_relation *relation;
	struct lcr_msg *message;

	relation = j_relation;

	if (!relation)
		return;
	if (!relation->next)
		return;
	while(relation) {
		message = message_create(j_serial, relation->epoint_id, JOIN_TO_EPOINT, MESSAGE_TONE);
		SCPY(message->param.tone.name, (char *)((in)?"joined":"left"));
		message_put(message);
		relation = relation->next;
	}
}