package subscribe

import (
	"encoding/json"
	"fmt"
)

type Message struct {
	TargetType TargetType       `json:"targetType"`
	Targets    []string         `json:"targets"`
	Message    *json.RawMessage `json:"message"`
}

type MessageBody struct {
	Version string      `json:"jsonrpc"`
	Method  string      `json:"method"`
	Params  interface{} `json:"params,omitempty"`
}

type TargetType int

const (
	MEMBER_SESSION TargetType = iota
	MEMBER
	PROBE
)

var (
	targetTypeID = map[TargetType]string{
		MEMBER_SESSION: "MEMBER_SESSION",
		MEMBER:         "MEMBER",
		PROBE:          "PROBE",
	}

	targetTypeName = map[string]TargetType{
		"MEMBER_SESSION": MEMBER_SESSION,
		"MEMBER":         MEMBER,
		"PROBE":          PROBE,
	}
)

func (st TargetType) String() string {
	return targetTypeID[st]
}

func (st *TargetType) MarshalJSON() ([]byte, error) {
	value, ok := targetTypeID[*st]
	if !ok {
		return nil, fmt.Errorf("Invalid EnumType[%s] value", *st)
	}
	return json.Marshal(value)
}

func (st *TargetType) UnmarshalJSON(b []byte) error {
	// unmarshal as string
	var s string
	err := json.Unmarshal(b, &s)
	if err != nil {
		return err
	}

	value, ok := targetTypeName[s]
	if !ok {
		return fmt.Errorf("Invalid EnumType[%s] value", s)
	}
	*st = value
	return nil
}