#ifndef MSXRS232_HH

#define MSXRS232_HH

#include "I8251.hh"

#include "I8254.hh"

#include "IRQHelper.hh"

#include "MSXDevice.hh"

#include "RS232Connector.hh"

#include <memory>

namespace openmsx {

class Ram;

class Rom;

class BooleanSetting;

class MSXRS232 final : public MSXDevice, public RS232Connector

{

public:

	explicit MSXRS232(DeviceConfig& config);

	~MSXRS232() override;

	void powerUp(EmuTime time) override;

	void reset(EmuTime time) override;

	[[nodiscard]] uint8_t readIO(uint16_t port, EmuTime time) override;

	[[nodiscard]] uint8_t peekIO(uint16_t port, EmuTime time) const override;

	void writeIO(uint16_t port, uint8_t value, EmuTime time) override;

	[[nodiscard]] uint8_t readMem(uint16_t address, EmuTime time) override;

	// TODO: implement peekMem, because the default isn't OK anymore

	[[nodiscard]] const uint8_t *getReadCacheLine(uint16_t start) const override;

	void writeMem(uint16_t address, uint8_t value, EmuTime time) override;

	[[nodiscard]] uint8_t* getWriteCacheLine(uint16_t start) override;

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

	// RS232Connector  (input)

	void setDataBits(DataBits bits) override;

	void setStopBits(StopBits bits) override;

	void setParityBit(bool enable, Parity parity) override;

	void recvByte(uint8_t value, EmuTime time) override;

	[[nodiscard]] bool ready() override;

	[[nodiscard]] bool acceptsData() override;

	template<typename Archive>

	void serialize(Archive& ar, unsigned version);

private:

	[[nodiscard]] uint8_t readIOImpl(uint16_t port, EmuTime time);

	void writeIOImpl(uint16_t port, uint8_t value, EmuTime time);

	void notifyBaudRate();

	[[nodiscard]] uint8_t readStatus(EmuTime time);

	void setIRQMask(uint8_t value);

	void setRxRDYIRQ(bool status);

	void enableRxRDYIRQ(bool enabled);

	struct Counter0 final : ClockPinListener {

		void signal(ClockPin& pin, EmuTime time) override;

		void signalPosEdge(ClockPin& pin, EmuTime time) override;

	} cntr0; // counter 0 rx clock pin

	struct Counter1 final : ClockPinListener {

		void signal(ClockPin& pin, EmuTime time) override;

		void signalPosEdge(ClockPin& pin, EmuTime time) override;

	} cntr1; // counter 1 tx clock pin

	I8254 i8254;

	struct Interface final : I8251Interface {

		void setRxRDY(bool status, EmuTime time) override;

		void setDTR(bool status, EmuTime time) override;

		void setRTS(bool status, EmuTime time) override;

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

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

		void setDataBits(DataBits bits) override;

		void setStopBits(StopBits bits) override;

		void setParityBit(bool enable, Parity parity) override;

		void recvByte(uint8_t value, EmuTime time) override;

		void signal(EmuTime time) override;

	} interface;

	I8251 i8251;

	const std::unique_ptr<Rom> rom; // can be nullptr

	const std::unique_ptr<Ram> ram; // can be nullptr

	IRQHelper rxrdyIRQ;

	bool rxrdyIRQlatch = false;

	bool rxrdyIRQenabled = false;

	const bool hasMemoryBasedIo;

	const bool hasRIPin;

	const bool inputsPullup;

	bool ioAccessEnabled;

	const std::unique_ptr<BooleanSetting> switchSetting; // can be nullptr

};

SERIALIZE_CLASS_VERSION(MSXRS232, 2);

} // namespace openmsx

#endif