package service

import "errors"

type Error struct {
	Status  int
	Message string
	Err     error
}

func (e *Error) Error() string {
	if e == nil {
		return ""
	}

	return e.Message
}

func (e *Error) Unwrap() error {
	if e == nil {
		return nil
	}

	return e.Err
}

func newError(status int, message string, err error) error {
	return &Error{
		Status:  status,
		Message: message,
		Err:     err,
	}
}

func badRequest(message string) error {
	return newError(400, message, nil)
}

func NewValidationError(message string) error {
	return badRequest(message)
}

func notFound(message string) error {
	return newError(404, message, nil)
}

func internalError(message string, err error) error {
	return newError(500, message, err)
}

func StatusCode(err error) int {
	if serviceErr, ok := errors.AsType[*Error](err); ok {
		return serviceErr.Status
	}

	return 500
}

func Message(err error) string {
	if serviceErr, ok := errors.AsType[*Error](err); ok {
		return serviceErr.Message
	}

	return "internal server error"
}