package proto

import (
	"encoding/json"
	"strconv"
)

type HexByte byte

type ProtoComplete struct {
	Header    ProtocolHeader            `json:"protocol"`
	Protocols map[string][]ProtoMessage `json:"protocols"`
}

type ProtocolHeader struct {
	StartByte     HexByte `json:"start_byte"`
	MessageLength int     `json:"message_length"`
	MaxPayload    int     `json:"max_payload"`
	Checksum      string  `json:"checksum"`
}

type ProtoMessage struct {
	Name    string                `json:"name"`
	ID      HexByte               `json:"id"`
	Payload []ProtoMessagePayload `json:"payload,omitempty"` // optional falls kein payload
}

type ProtoMessagePayload struct {
	Name        string `json:"name"`
	DataType    string `json:"type"`
	ArrayLength int    `json:"array,omitempty"` // optional falls kein array
}

func (h *HexByte) UnmarshalJSON(data []byte) error {
	var s string
	if err := json.Unmarshal(data, &s); err != nil { // turn into go string
		return err
	}

	i, err := strconv.ParseUint(s, 0, 8)
	if err != nil {
		return err
	}

	*h = HexByte(i)
	return nil
}