// Copyright (C) 2020 Guido Berhoerster <guido+managesieve@berhoerster.name>
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
// IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
// CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
// TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
// SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

package main

import (
	"flag"
	"fmt"
	"strings"
)

type command struct {
	UsageLine string
	Flag      flag.FlagSet
	Run       func(cmd *command, args []string) error
}

func (c *command) Usage() {
	fmt.Fprintf(flag.CommandLine.Output(), "usage:\n  %s %s\n",
		flag.CommandLine.Name(), c.UsageLine)
	fmt.Fprintln(flag.CommandLine.Output(), "options:")
	c.Flag.PrintDefaults()
}

func (c *command) Name() string {
	return strings.SplitN(strings.Trim(c.UsageLine, " "), " ", 2)[0]
}