/**
 * @file	tunerstudio_io.h
 * @file TS protocol commands and methods are here
 *
 * @date Mar 8, 2015
 * @author Andrey Belomutskiy, (c) 2012-2020
 */

#pragma once
#include "global.h"

#if EFI_USB_SERIAL
#include "usbconsole.h"
#endif // EFI_USB_SERIAL

#if EFI_PROD_CODE
#include "pin_repository.h"
#endif

typedef enum {
	TS_PLAIN = 0,
	TS_CRC = 1
} ts_response_format_e;

class TsChannelBase {
public:
	// Virtual functions - implement these for your underlying transport
	virtual void write(const uint8_t* buffer, size_t size) = 0;
	virtual size_t readTimeout(uint8_t* buffer, size_t size, int timeout) = 0;

	// These functions are optional to implement, not all channels need them
	virtual void flush() { }
	virtual bool isReady() { return true; }
	virtual void stop() { }

	// Base functions that use the above virtual implementation
	size_t read(uint8_t* buffer, size_t size);

#ifdef TS_CAN_DEVICE
	virtual	// CAN device needs this function to be virtual for small-packet optimization
#endif
	void writeCrcPacket(uint8_t responseCode, const uint8_t* buf, size_t size);
	void sendResponse(ts_response_format_e mode, const uint8_t * buffer, int size);

	/**
	 * See 'blockingFactor' in rusefi.ini
	 */
	char scratchBuffer[BLOCKING_FACTOR + 30];

	bool wasReady = false;

private:
	void writeCrcPacketSmall(uint8_t responseCode, const uint8_t* buf, size_t size);
	void writeCrcPacketLarge(uint8_t responseCode, const uint8_t* buf, size_t size);
};

struct ts_channel_s : public TsChannelBase {
	void write(const uint8_t* buffer, size_t size) override;
	size_t readTimeout(uint8_t* buffer, size_t size, int timeout) override;
	bool isReady() override;

#if !EFI_UNIT_TEST
	BaseChannel * channel = nullptr;
#endif

#if TS_UART_DMA_MODE || PRIMARY_UART_DMA_MODE || TS_UART_MODE
	UARTDriver *uartp = nullptr;
#endif // TS_UART_DMA_MODE
};

#define CRC_VALUE_SIZE 4
// todo: double-check this
#define CRC_WRAPPING_SIZE (CRC_VALUE_SIZE + 3)

void startTsPort(ts_channel_s *tsChannel);
bool stopTsPort(ts_channel_s *tsChannel);

// that's 1 second
#define BINARY_IO_TIMEOUT TIME_MS2I(1000)

// that's 1 second
#define SR5_READ_TIMEOUT TIME_MS2I(1000)

void sendOkResponse(TsChannelBase *tsChannel, ts_response_format_e mode);