#ifndef DRIVEMULTIPLEXER_HH

#define DRIVEMULTIPLEXER_HH

#include "DiskDrive.hh"

#include "stl.hh"

#include <cstdint>

#include <memory>

#include <span>

namespace openmsx {

/**

 * This class connects to a FDC as a normal DiskDrive and delegates all

 * requests to one of four other DiskDrives.

 */

class DriveMultiplexer final : public DiskDrive

{

public:

	enum class Drive : uint8_t {

		A, B, C, D, NONE,

		NUM

	};

	// Multiplexer interface

	explicit DriveMultiplexer(std::span<std::unique_ptr<DiskDrive>, 4> drv);

	void selectDrive(Drive num, EmuTime time);

	[[nodiscard]] Drive getSelectedDrive() const { return selected; }

	// DiskDrive interface

	[[nodiscard]] bool isDiskInserted() const override;

	[[nodiscard]] bool isWriteProtected() const override;

	[[nodiscard]] bool isDoubleSided() override;

	[[nodiscard]] bool isTrack00() const override;

	void setSide(bool side) override;

	[[nodiscard]] bool getSide() const override;

	void step(bool direction, EmuTime time) override;

	void setMotor(bool status, EmuTime time) override;

	[[nodiscard]] bool getMotor() const override;

	[[nodiscard]] bool indexPulse(EmuTime time) override;

	[[nodiscard]] EmuTime getTimeTillIndexPulse(EmuTime time, int count) override;

	[[nodiscard]] unsigned getTrackLength() override;

	void writeTrackByte(int idx, uint8_t val, bool addIdam) override;

	[[nodiscard]] uint8_t readTrackByte(int idx) override;

	EmuTime getNextSector(EmuTime time, RawTrack::Sector& sector) override;

	void flushTrack() override;

	bool diskChanged() override;

	[[nodiscard]] bool peekDiskChanged() const override;

	[[nodiscard]] bool isDummyDrive() const override;

	void applyWd2793ReadTrackQuirk() override;

	void invalidateWd2793ReadTrackQuirk() override;

	[[nodiscard]] bool isDiskInserted(Drive num) const;

	bool diskChanged(Drive num);

	[[nodiscard]] bool peekDiskChanged(Drive num) const;

	template<typename Archive>

	void serialize(Archive& ar, unsigned version);

private:

	DummyDrive dummyDrive;

	array_with_enum_index<Drive, DiskDrive*> drive;

	Drive selected = Drive::NONE;

	bool motor = false;

	bool side = false;

};

} // namespace openmsx

#endif