package errors

import "fmt"

//ErrUserNotFound occurs when a user is not found.
type ErrUserNotFound struct{}

//Error returns error message
func (e *ErrUserNotFound) Error() string {
	return "user not found"
}

//NewErrUserNotFound occurs when a user is not found.
func NewErrUserNotFound() error {
	return &ErrUserNotFound{}
}

//ErrInvalidArgument occurs when an argument is invalid.
type ErrInvalidArgument struct {
	argument string
	message  string
}

//Error returns error message
func (e *ErrInvalidArgument) Error() string {
	return fmt.Sprintf("invalid argument: %s (%s)", e.argument, e.message)
}

//NewErrInvalidArgument occurs when an argument is invalid.
func NewErrInvalidArgument(argument string, message string) error {
	return &ErrInvalidArgument{argument, message}
}

//ErrUserRepositoryErr occurs when something in the user repository went wrong.
type ErrUserRepositoryErr struct {
	message  string
	original error
}

//Error returns error message
func (e *ErrUserRepositoryErr) Error() string {
	return fmt.Sprintf("%s: %s", e.message, e.original.Error())
}

//NewErrUserRepositoryErr occurs when something in the user repository went wrong.
func NewErrUserRepositoryErr(message string, original error) error {
	return &ErrUserRepositoryErr{message, original}
}

//ErrAuthFailed occurs when something in the auth client went wrong.
type ErrAuthFailed struct {
	original error
}

//Error returns error message
func (e *ErrAuthFailed) Error() string {
	return fmt.Sprintf("authentication failed: %s", e.original.Error())
}

//NewErrAuthFailed occurs when something in the auth client went wrong.
func NewErrAuthFailed(original error) error {
	return &ErrAuthFailed{original}
}

//ErrUnauthorized occurs when a user is not found.
type ErrUnauthorized struct{}

//Error returns error message
func (e *ErrUnauthorized) Error() string {
	return "unauthorized"
}

//NewErrUnauthorized occurs when a user is not found.
func NewErrUnauthorized() error {
	return &ErrUnauthorized{}
}