/**
 * Copyright - See the COPYRIGHT that is included with this distribution.
 * pvAccessCPP is distributed subject to a Software License Agreement found
 * in file LICENSE that is included with this distribution.
 */

#include <pv/serverChannelImpl.h>

using namespace epics::pvData;

namespace epics {
namespace pvAccess {

ServerChannelImpl::ServerChannelImpl(Channel::shared_pointer const & channel,
                                     pvAccessID cid, pvAccessID sid,
                                     ChannelSecuritySession::shared_pointer const & css):
			_channel(channel),
			_cid(cid),
			_sid(sid),
            _destroyed(false),
            _channelSecuritySession(css)
{
	if (!channel.get())
	{
		THROW_BASE_EXCEPTION("non-null channel required");
	}
}

Channel::shared_pointer ServerChannelImpl::getChannel()
{
	return _channel;
}

pvAccessID ServerChannelImpl::getCID() const
{
	return _cid;
}

pvAccessID ServerChannelImpl::getSID() const
{
	return _sid;
}

ChannelSecuritySession::shared_pointer ServerChannelImpl::getChannelSecuritySession() const
{
    return _channelSecuritySession;
}

void ServerChannelImpl::registerRequest(const pvAccessID id, Destroyable::shared_pointer const & request)
{
	Lock guard(_mutex);
	_requests[id] = request;
}

void ServerChannelImpl::unregisterRequest(const pvAccessID id)
{
	Lock guard(_mutex);
	std::map<pvAccessID, epics::pvData::Destroyable::shared_pointer>::iterator iter = _requests.find(id);
	if(iter != _requests.end())
	{
		_requests.erase(iter);
	}
}

Destroyable::shared_pointer ServerChannelImpl::getRequest(const pvAccessID id)
{
	Lock guard(_mutex);
	std::map<pvAccessID, epics::pvData::Destroyable::shared_pointer>::iterator iter = _requests.find(id);
	if(iter != _requests.end())
	{
		return iter->second;
	}
	return Destroyable::shared_pointer();
}

void ServerChannelImpl::destroy()
{
	Lock guard(_mutex);
	if (_destroyed) return;
	_destroyed = true;

	// destroy all requests
	destroyAllRequests();

    // close channel security session
    // TODO try catch
    _channelSecuritySession->close();

    // ... and the channel
    // TODO try catch
	_channel->destroy();
}

ServerChannelImpl::~ServerChannelImpl()
{
    destroy();
}

void ServerChannelImpl::printInfo()
{
	printInfo(stdout);
}

void ServerChannelImpl::printInfo(FILE *fd)
{
	fprintf(fd,"CLASS        : %s\n", typeid(*this).name());
	fprintf(fd,"CHANNEL      : %s\n", typeid(*_channel).name());
}

void ServerChannelImpl::destroyAllRequests()
{
	Lock guard(_mutex);

	// resource allocation optimization
	if (_requests.size() == 0)
		return;

	while(_requests.size() != 0)
	{
		_requests.begin()->second->destroy();
	}

	_requests.clear();
}

}
}