package cli

// -------------- argStringArray ----------------
type argStringArray struct {
	base      argBase
	targetVar *[]string
}

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

func (spec *argStringArray) parse(cli *CliParser, specIndex int, args []string, argIndex int) (consumedArgs int, err error) {
	consumedArgs = 1
	if spec.targetVar != nil {
		if argIndex < len(args) {
			remainingSpecs := len(cli.argSpecs) - specIndex - 1
			availableArgs := len(args) - remainingSpecs
			if availableArgs > 0 {
				*spec.targetVar = args[argIndex : argIndex+availableArgs]
				consumedArgs = availableArgs
			} else {
				err = errTooFewArguments(len(cli.argSpecs))
			}
		} else if spec.base.required {
			err = errMissingRequiredArg(spec.base.name)
		}
	}
	return
}

func (cli *CliParser) AddStringArrayArg(name string, required bool, targetVar *[]string, description string) {
	// todo: check if arg already exists
	if len(cli.argSpecs) > 0 {
		lastArg := cli.argSpecs[len(cli.argSpecs)-1].getBase()
		if lastArg.repeat {
			panic(errRepeatArgAlreadyDefined(lastArg.name))
		}
	}
	cli.argSpecs = append(cli.argSpecs, &argStringArray{
		base: argBase{
			name:        name,
			description: description,
			required:    required,
			repeat:      true,
		},
		targetVar: targetVar,
	})
}