package dto

import (
	"bytes"
	"encoding/json"
)

type TokenEndpointAuthMethod int

const (
	None TokenEndpointAuthMethod = iota
	ClientSecretPost
	ClientSecretBasic
)

var toString = map[TokenEndpointAuthMethod]string{
	None:              "none",
	ClientSecretPost:  "client_secret_post",
	ClientSecretBasic: "client_secret_basic",
}

var toID = map[string]TokenEndpointAuthMethod{
	"none":                None,
	"client_secret_post":  ClientSecretPost,
	"client_secret_basic": ClientSecretBasic,
}

func (x TokenEndpointAuthMethod) MarshalJSON() ([]byte, error) {
	buffer := bytes.NewBufferString(`"`)
	buffer.WriteString(toString[x])
	buffer.WriteString(`"`)
	return buffer.Bytes(), nil
}

func (x *TokenEndpointAuthMethod) UnmarshalJSON(b []byte) error {
	var val string
	if err := json.Unmarshal(b, &val); err != nil {
		return err
	}
	*x = toID[val]
	return nil
}

func (x TokenEndpointAuthMethod) String() string {
	return toString[x]
}