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#ifndef G4MULTISENSITIVEDETECTOR_H
#define G4MULTISENSITIVEDETECTOR_H

#include "G4VSensitiveDetector.hh"
#include <vector>

//class description:
//This class allows to assign multiple sensitive detectors to a single
//logical-volume.
//SDs are added to this proxy and an instance of the proxy is assigned
//to the logical volume. Calls to SD methods are forwarded to ALL
//user-defined SD that are added.

class G4MultiSensitiveDetector : public G4VSensitiveDetector
{
public:
	G4MultiSensitiveDetector(G4String name );
	//Second optional parameter allows to append to the SDname a random string
	G4MultiSensitiveDetector(const G4MultiSensitiveDetector &rhs);
	//Cosntructors. The name of the instance must be unique
	virtual ~G4MultiSensitiveDetector();

	G4MultiSensitiveDetector& operator=(const G4MultiSensitiveDetector& rhs);
public:
	//interface from G4VSensitiveDetector starts here.
	//See G4VSensitiveDetector for documentation.
	//All these methods forward the call to each of the SD
	//attached to this proxy.
	virtual void Initialize(G4HCofThisEvent*);
	virtual void EndOfEvent(G4HCofThisEvent*);
	virtual void clear();
    virtual void DrawAll();
    virtual void PrintAll();
protected:
    //The return value is an AND of the called SDs return values.
    //This method will call the "Hit(G4Step*)" method of all
    //added SDs. Note that the ROhist of this method is not used
    virtual G4bool ProcessHits(G4Step*aStep,G4TouchableHistory*ROhist);
    //The following method does not have a meaning for this concrete class
    virtual G4int GetCollectionID(G4int i) final;
public:
    //Note, that cloning works only if all the contained SDs are also
    //clonable.
    virtual G4VSensitiveDetector* Clone() const;
public:
    //===== Main interface of this special SD
    using sds_t = std::vector<G4VSensitiveDetector*>;
    using sdsConstIter = sds_t::const_iterator;
    G4VSensitiveDetector* GetSD(const int i) const { return fSensitiveDetectors[i]; }
    sds_t::size_type GetSize() const { return fSensitiveDetectors.size(); }
    sdsConstIter GetBegin() const { return fSensitiveDetectors.begin(); }
    sdsConstIter GetEnd() const { return fSensitiveDetectors.end(); }
    void ClearSDs() { fSensitiveDetectors.clear(); }
    void AddSD( G4VSensitiveDetector* sd) { fSensitiveDetectors.push_back(sd); }
private:
    sds_t fSensitiveDetectors;
};

#endif //G4MULTISENSITIVEDETECTOR_H