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#ifndef NEARFIELDTAGASYNCREQUEST_SYMBIAN_H
#define NEARFIELDTAGASYNCREQUEST_SYMBIAN_H

#include <qnearfieldtarget.h>
#include <e32base.h>

class QNearFieldTagImplCommon;

class MNearFieldTagAsyncRequest
    {
public:
    enum TRequestType
        {
        ENdefRequest,
        ETagCommandRequest,
        ETagCommandsRequest,
        ENull
        };

public:
    MNearFieldTagAsyncRequest(QNearFieldTagImplCommon& aOperator);

    virtual ~MNearFieldTagAsyncRequest();
    virtual void IssueRequest() = 0;
    virtual void ProcessResponse(TInt aError);

    // inline to get fast speed since this function is used internally
    // to convert async ndef request to sync.
    virtual void ProcessTimeout() = 0;

    virtual void ProcessWaitRequestCompleted(TInt aError);

    // emit signal defined in QNearFieldTarget
    virtual void ProcessEmitSignal(TInt aError) = 0;

    // should call iOperator->handleResponse(id, response)
    virtual void HandleResponse(TInt aError) = 0;

    virtual TRequestType Type() = 0;

    virtual bool WaitRequestCompleted(int aMsec);
    virtual int WaitRequestCompletedNoSignal(int aMsec);

    void SetRequestId(QNearFieldTarget::RequestId aId);
    QNearFieldTarget::RequestId RequestID();
    static TInt TimeoutCallback(TAny * aObj);
protected:
    // Current async request ID.
    QNearFieldTarget::RequestId iId;
    // Not own.
    QNearFieldTagImplCommon& iOperator;

    // Own.
    CActiveSchedulerWait * iWait;
    // Own.
    CPeriodic * iTimer;
    TBool iRequestIssued;

    int iMsecs;
    bool iSendSignal;
    volatile int * iRequestResult;

    volatile bool * iCurrentRequestResult;
    };

#endif // NEARFIELDTAGASYNCREQUEST_SYMBIAN_H