/*
 * SPDX-License-Identifier: AGPL-3.0-only
 * Copyright (c) Camden Dixie O'Brien
 */

#ifndef PROTOCOL_MESSAGES_H
#define PROTOCOL_MESSAGES_H

#include "alarm_types.h"

#include <stdint.h>

#define MESSAGE_MAX_PARAMS 16

typedef enum {
	MESSAGE_PARAM_TYPE_U8 = 0,
	MESSAGE_PARAM_TYPE_U16 = 1,
	MESSAGE_PARAM_TYPE_U32 = 2,
	MESSAGE_PARAM_TYPE_U64 = 3,
	MESSAGE_PARAM_TYPE_STRING = 4,
	MESSAGE_PARAM_TYPE_ALARM = 5,

	MESSAGE_PARAM_TYPE_COUNT,
} MessageParamType;

typedef struct {
	MessageParamType type;
	union {
		uint8_t u8;
		uint16_t u16;
		uint32_t u32;
		uint64_t u64;
		const char *string;
		Alarm alarm;
	};
} MessageParam;

typedef enum {
	COMMAND_INSTRUCTION_GET_VERSION = 0,
	COMMAND_INSTRUCTION_SET_TIME = 1,
	COMMAND_INSTRUCTION_LIST_ALARMS = 2,
	COMMAND_INSTRUCTION_ADD_ALARM = 3,
	COMMAND_INSTRUCTION_REMOVE_ALARM = 4,
	COMMAND_INSTRUCTION_LIST_SETTINGS = 5,
	COMMAND_INSTRUCTION_SET_SETTING = 6,

	COMMAND_INSTRUCTION_COUNT,
} CommandInstruction;

typedef enum {
	RESPONSE_STATUS_OK = 0,
	RESPONSE_STATUS_BUSY = 1,
	RESPONSE_STATUS_INVALID_COMMAND = 2,
	RESPONSE_STATUS_INTERNAL_ERROR = 3,
	RESPONSE_STATUS_OUT_OF_SPACE = 4,

	RESPONSE_STATUS_COUNT,
} ResponseStatus;

typedef struct {
	union {
		CommandInstruction instruction;
		ResponseStatus status;
	};
	uint8_t param_count;
	MessageParam params[MESSAGE_MAX_PARAMS];
} Message;

#endif