package stty

import (
	"fmt"
)

func filterNilErrors(errs []error) (notNilErrs []error) {
	for _, err := range errs {
		if err != nil {
			notNilErrs = append(notNilErrs, err)
		}
	}
	return notNilErrs
}

func Join(errs ...error) (result error) {
	errs = filterNilErrors(errs)
	if len(errs) == 0 {
		return nil
	}
	
	for index, err := range errs {
		if index == 0 {
			result = err
		} else {
			result = fmt.Errorf("%w: %v", result, err)
		}
		
	}
    return result
}

func ERR_NOT_TTY() error {
    return fmt.Errorf("File is not a tty")
}

func ERR_CANNOT_OPEN_FILE() error {
    return fmt.Errorf("Can not open file")
}

func ERR_NO_WRITE_ACCESS() error {
    return fmt.Errorf("No write access")
}

func ERR_STTY_MISSING() error {
    return fmt.Errorf("Stty is missing")
}

func ERR_BAUDRATE_NOT_SUPPORTED() error {
    return fmt.Errorf("Selected baudrate is not supported")
}

func ERR_SET_BAUDRATE_FAILED() error {
    return fmt.Errorf("Failed to set baudrate using stty")
}

func ERR_CHECK_BAUDRATE_FAILED() error {
    return fmt.Errorf("Failed to check baudrate using stty")
}