package cli

// -------------- argString ----------------
type argString struct {
	base      argBase
	targetVar *string
}

func (arg *argString) getBase() *argBase {
	return &arg.base
}

func (spec *argString) parse(cli *CliParser, specIndex int, args []string, argIndex int) (consumedArgs int, err error) {
	consumedArgs = 1
	if spec.targetVar != nil {
		if argIndex < len(args) {
			*spec.targetVar = args[argIndex]
		} else if spec.base.required {
			err = errMissingRequiredArg(spec.base.name)
		}
	}
	return
}

func (cli *CliParser) AddStringArg(name string, required bool, targetVar *string, description string) {
	// todo: check if arg already exists
	cli.argSpecs = append(cli.argSpecs, &argString{
		base: argBase{
			name:        name,
			description: description,
			required:    required,
			repeat:      false,
		},
		targetVar: targetVar,
	})
}