#ifndef MODBUS_SERVER_H
#define MODBUS_SERVER_H

#include <stdint.h>

/**
 * @brief Modbus Input Register Addresses.
 */
enum {
	/* Valve Control & Status */
	REG_INPUT_VALVE_STATE_MOVEMENT        = 0x0000,
	REG_INPUT_MOTOR_CURRENT_MA            = 0x0001,
	/* Digital Inputs */
	REG_INPUT_DIGITAL_INPUTS_STATE        = 0x0020,
	REG_INPUT_BUTTON_EVENTS               = 0x0021,
	/* System Config & Status */
	REG_INPUT_FIRMWARE_VERSION_MAJOR_MINOR = 0x00F0,
	REG_INPUT_FIRMWARE_VERSION_PATCH      = 0x00F1,
	REG_INPUT_DEVICE_STATUS               = 0x00F2,
	REG_INPUT_UPTIME_SECONDS_LOW          = 0x00F3,
	REG_INPUT_UPTIME_SECONDS_HIGH         = 0x00F4,
	/* Firmware Update */
	REG_INPUT_FWU_LAST_CHUNK_CRC          = 0x0100,
};

/**
 * @brief Modbus Holding Register Addresses.
 */
enum {
	/* Valve Control */
	REG_HOLDING_VALVE_COMMAND             = 0x0000,
	REG_HOLDING_MAX_OPENING_TIME_S        = 0x0001,
	REG_HOLDING_MAX_CLOSING_TIME_S        = 0x0002,
	/* Digital Outputs */
	REG_HOLDING_DIGITAL_OUTPUTS_STATE     = 0x0010,
	/* System Config */
	REG_HOLDING_WATCHDOG_TIMEOUT_S        = 0x00F0,
	REG_HOLDING_DEVICE_RESET              = 0x00F1,
	/* Firmware Update */
	REG_HOLDING_FWU_COMMAND               = 0x0100,
	REG_HOLDING_FWU_CHUNK_OFFSET_LOW      = 0x0101,
	REG_HOLDING_FWU_CHUNK_OFFSET_HIGH     = 0x0102,
	REG_HOLDING_FWU_CHUNK_SIZE            = 0x0103,
	REG_HOLDING_FWU_DATA_BUFFER           = 0x0180,
};

int modbus_server_init(void);
int modbus_reconfigure(uint32_t baudrate, uint8_t unit_id);
uint32_t modbus_get_baudrate(void);
uint8_t modbus_get_unit_id(void);

#endif // MODBUS_SERVER_H