package instruction

import (
	"fmt"
)

// ErrInvalidAlias is raised when encountering an invalid token in an alias name
var ErrInvalidAlias = fmt.Errorf("invalid alias name (contains '/')")

// ErrInvalidSyntax is raised when encountering an invalid token
var ErrInvalidSyntax = fmt.Errorf("invalid instruction format")

// ErrUnknownInstruction is raised when encountering an unknown instruction
// it can mean that you're not using the right version or that you've misspelled it
var ErrUnknownInstruction = fmt.Errorf("unknown instruction")

// FileError is used for file-specific errors
type FileError struct {
	Reason string
	File   string
	Err    error
}

func (ce FileError) Error() string {
	if ce.Err == nil {
		return fmt.Sprintf("%s '%s'", ce.Reason, ce.File)
	}
	return fmt.Sprintf("%s '%s' | %s", ce.Reason, ce.File, ce.Err)
}