package cli

import (
	"strings"
)

type argSpec interface {
	getBase() *argBase
	parse(cli *CliParser, specIndex int, args []string, argIndex int) (consumedArgs int, err error)
}

type argBase struct {
	name        string
	description string
	required    bool
	repeat      bool
}

// -------------- Argument Template functions  ----------------
func (cli *CliParser) getArgTemplate(spec argSpec) (templ string) {
	arg := spec.getBase()
	templ = "<" + arg.name + ">"
	if arg.repeat {
		templ += " ..."
	}
	if !arg.required {
		templ = "[" + templ + "]"
	}
	return
}

func (cli *CliParser) getArgsTemplate() (argsTemplate string) {
	templates := make([]string, len(cli.argSpecs))
	for i, argSpec := range cli.argSpecs {
		templates[i] = cli.getArgTemplate(argSpec)
	}

	argsTemplate = strings.Join(templates, " ")
	return
}