#ifndef EMULATE_SPLIT_TRANSCEIVER_HPP__
#define EMULATE_SPLIT_TRANSCEIVER_HPP__

#include "Transceiver.h"

#include <memory>

//
// Emulate Split Transceiver
//
// Helper decorator class that encapsulates  the emulation of split TX
// operation.
//
// Responsibilities
//
//  Delegates  all  but setting  of  other  (split) frequency  to  the
//  wrapped Transceiver instance. Also routes failure signals from the
//  wrapped Transceiver instance to this instances failure signal.
//
//  Intercepts status  updates from  the wrapped  Transceiver instance
//  and re-signals it with the emulated status.
//
//  Generates a status update signal if the other (split) frequency is
//  changed, this is necessary  since the wrapped transceiver instance
//  never receives other frequency changes.
//
class EmulateSplitTransceiver final : public Transceiver {
  public:
    // takes ownership of wrapped Transceiver
    explicit EmulateSplitTransceiver(std::unique_ptr<Transceiver> wrapped,
                                     QObject *parent = nullptr);

    void set(TransceiverState const &,
             unsigned sequence_number) noexcept override;

    // forward everything else to wrapped Transceiver
    void start(unsigned sequence_number) noexcept override {
        wrapped_->start(sequence_number);
    }
    void stop() noexcept override { wrapped_->stop(); }

  private:
    void handle_update(TransceiverState const &, unsigned seqeunce_number);

    std::unique_ptr<Transceiver> wrapped_;
    Frequency rx_frequency_; // requested Rx frequency
    Frequency tx_frequency_; // requested Tx frequency
    bool split_;             // requested split state
};

#endif