package terror

const (
	errCodeUnauthorized  = 100
	errCodeTokenExpired  = 101
	errCodeNoAccessToken = 102
)

// Common
// IError : parent error.
type IError struct {
	code        int `default:"999"`
	message     string
	description string
}

func (err IError) Error() string { return err.message }

// IsSameError : Compare internal error code if target could convert IError instance.
func (err IError) IsSameError(target error) bool {
	if convertError, e := target.(IError); !e {
		return false
	} else {
		return convertError.code == err.code
	}
}

// SetDescriptor : Could be add access token description.
func (err IError) SetDescriptor(desc string) IError {
	err.description = desc
	return err
}

//
// ErrorUnAuthorized : Error when request with unauthrized token
type ErrorUnAuthorized IError

// NewErrorUnAuthorized : Make a error instance
func NewErrorUnAuthorized() ErrorUnAuthorized {
	return ErrorUnAuthorized{
		code:    errCodeUnauthorized,
		message: "Unauthorized!",
	}
}

// ErrorTokenExpired : Token is expired!
type ErrorTokenExpired IError

// NewErrorTokenExpired : Make a error instance notifing Token Expired!
func NewErrorTokenExpired() IError {
	return IError{
		code:    errCodeUnauthorized,
		message: "Expired token!",
	}
}

// ErrorNoAccessToken : No access token. But it maybe unregistered user.
type ErrorNoAccessToken IError

// NewErrorNoAccessToken : make a instance for NoAccessToken error.
func NewErrorNoAccessToken() IError {
	return IError{
		code:    errCodeNoAccessToken,
		message: "Invalid access token.",
	}
}