#ifndef __dvb_dvb_h
#define __dvb_dvb_h

#include <lib/dvb/idvb.h>
#include <lib/dvb/demux.h>
#include <lib/dvb/frontend.h>
#include <connection.h>

class eDVBChannel;
class eDVBChannel;

	/* we do NOT handle resource conflicts here. instead, the allocateChannel
	   fails, and the application has to see why the channel is allocated
	   (and how to deallocate it). */
class iDVBAdapter;

class eDVBRegisteredFrontend: public iObject
{
DECLARE_REF(eDVBRegisteredFrontend);
public:
	iDVBAdapter *m_adapter;
	ePtr<eDVBFrontend> m_frontend;
	int m_inuse;
	eDVBRegisteredFrontend(eDVBFrontend *fe, iDVBAdapter *adap): m_adapter(adap), m_frontend(fe), m_inuse(0) { }
};

struct eDVBRegisteredDemux
{
DECLARE_REF(eDVBRegisteredDemux);
public:
	iDVBAdapter *m_adapter;
	ePtr<eDVBDemux> m_demux;
	int m_inuse;
	eDVBRegisteredDemux(eDVBDemux *demux, iDVBAdapter *adap): m_adapter(adap), m_demux(demux), m_inuse(0) { }
};

class eDVBAllocatedFrontend
{
DECLARE_REF(eDVBAllocatedFrontend);
public:
	
	eDVBAllocatedFrontend(eDVBRegisteredFrontend *fe);
	~eDVBAllocatedFrontend();
	eDVBFrontend &get() { return *m_fe->m_frontend; }
	operator eDVBRegisteredFrontend*() { return m_fe; }
	operator eDVBFrontend*() { return m_fe->m_frontend; }

private:
	eDVBRegisteredFrontend *m_fe;
};

class eDVBAllocatedDemux
{
DECLARE_REF(eDVBAllocatedDemux);
public:
	
	eDVBAllocatedDemux(eDVBRegisteredDemux *demux);
	~eDVBAllocatedDemux();
	eDVBDemux &get() { return *m_demux->m_demux; }
	operator eDVBRegisteredDemux*() { return m_demux; }
	operator eDVBDemux*() { return m_demux->m_demux; }
	
private:
	eDVBRegisteredDemux *m_demux;
};

class iDVBAdapter: public iObject
{
public:
	virtual int getNumDemux() = 0;
	virtual RESULT getDemux(ePtr<eDVBDemux> &demux, int nr) = 0;
	
	virtual int getNumFrontends() = 0;
	virtual RESULT getFrontend(ePtr<eDVBFrontend> &fe, int nr) = 0;
};

class eDVBAdapterLinux: public iDVBAdapter
{
DECLARE_REF(eDVBAdapterLinux);
public:
	eDVBAdapterLinux(int nr);

	int getNumDemux();
	RESULT getDemux(ePtr<eDVBDemux> &demux, int nr);
	
	int getNumFrontends();
	RESULT getFrontend(ePtr<eDVBFrontend> &fe, int nr);
	
	static int exist(int nr);
private:
	int m_nr;
	eSmartPtrList<eDVBFrontend> m_frontend;
	eSmartPtrList<eDVBDemux>    m_demux;
};

class eDVBResourceManager: public iObject
{
	DECLARE_REF(eDVBResourceManager);
	int avail, busy;
	
	eSmartPtrList<iDVBAdapter> m_adapter;
	
	eSmartPtrList<eDVBRegisteredDemux> m_demux;
	eSmartPtrList<eDVBRegisteredFrontend> m_frontend;
	
	void addAdapter(iDVBAdapter *adapter);
	
			/* allocates a frontend able to tune to channelID "chid".
			   the frontend must be tuned lateron. there is no guarante
			   that tuning will suceed - it just means that if this frontend
			   can't tune, no other frontend could do it.
			   
			   there might be a priority given to certain frontend/chid 
			   combinations. this will be evaluated here. */
			   
	RESULT allocateFrontend(const eDVBChannelID &chid, ePtr<eDVBAllocatedFrontend> &fe);
	
			/* allocate a demux able to filter on the selected frontend. */
	RESULT allocateDemux(eDVBRegisteredFrontend *fe, ePtr<eDVBAllocatedDemux> &demux);
	
	struct active_channel
	{
		eDVBChannelID m_channel_id;
			/* we don't hold a reference here. */
		eDVBChannel *m_channel;
		
		active_channel(const eDVBChannelID &chid, eDVBChannel *ch) : m_channel_id(chid), m_channel(ch) { }
	};
	
	std::list<active_channel> m_active_channels;
	
	ePtr<iDVBChannelList> m_list;
	ePtr<iDVBSatelliteEquipmentControl> m_sec;
	static eDVBResourceManager *instance;
	
	friend class eDVBChannel;
	RESULT addChannel(const eDVBChannelID &chid, eDVBChannel *ch);
	RESULT removeChannel(eDVBChannel *ch);
	
	Signal1<void,eDVBChannel*> m_channelAdded;
	Signal1<void,eDVBChannel*> m_channelRemoved;
	Signal1<void,iDVBChannel*> m_channelRunning;
public:
	eDVBResourceManager();
	virtual ~eDVBResourceManager();
	
	static RESULT getInstance(ePtr<eDVBResourceManager> &ptr) { if (instance) { ptr = instance; return 0; } return -1; }
	
	RESULT setChannelList(iDVBChannelList *list);
	RESULT getChannelList(ePtr<iDVBChannelList> &list);
	
	enum {
		errNoFrontend = -1,
		errNoDemux    = -2,
		errChidNotFound = -3
	};
	
		/* allocate channel... */
	RESULT allocateChannel(const eDVBChannelID &channelid, eUsePtr<iDVBChannel> &channel);
	RESULT allocateRawChannel(eUsePtr<iDVBChannel> &channel);
	RESULT allocatePVRChannel(int caps);

	RESULT connectChannelAdded(const Slot1<void,eDVBChannel*> &channelAdded, ePtr<eConnection> &connection);
	RESULT connectChannelRemoved(const Slot1<void,eDVBChannel*> &channelRemoved, ePtr<eConnection> &connection);
	RESULT connectChannelRunning(const Slot1<void,iDVBChannel*> &channelRemoved, ePtr<eConnection> &connection);
};

class eDVBChannel: public iDVBChannel, public Object
{
	DECLARE_REF(eDVBChannel);
private:
	ePtr<eDVBAllocatedFrontend> m_frontend;
	ePtr<eDVBAllocatedDemux> m_demux;
	
	ePtr<iDVBFrontendParameters> m_current_frontend_parameters;
	eDVBChannelID m_channel_id;
	Signal1<void,iDVBChannel*> m_stateChanged;
	int m_state;

			/* for channel list */
	ePtr<eDVBResourceManager> m_mgr;
	
	void frontendStateChanged(iDVBFrontend*fe);
	ePtr<eConnection> m_conn_frontendStateChanged;

	friend class eUsePtr<eDVBChannel>;
		/* use count */
	oRefCount m_use_count;
	void AddUse();
	void ReleaseUse();
public:
	eDVBChannel(eDVBResourceManager *mgr, eDVBAllocatedFrontend *frontend, eDVBAllocatedDemux *demux);
	virtual ~eDVBChannel();

		/* only for managed channels - effectively tunes to the channelid. should not be used... */
	RESULT setChannel(const eDVBChannelID &id);
	eDVBChannelID getChannelID() { return m_channel_id; }

	RESULT connectStateChange(const Slot1<void,iDVBChannel*> &stateChange, ePtr<eConnection> &connection);
	RESULT getState(int &state);

	RESULT setCIRouting(const eDVBCIRouting &routing);
	RESULT getDemux(ePtr<iDVBDemux> &demux);
	RESULT getFrontend(ePtr<iDVBFrontend> &frontend);
};

#endif