// Copyright © 2018 Eiji Onchi <eiji@onchi.me>
//
// 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 cmd

import (
	"fmt"
	"io"
	"os"
)

type speaker struct {
	level int
	w     io.Writer
}

var info = &speaker{1, os.Stdout}

func (s *speaker) print(a ...interface{}) (n int, err error) {
	if s.level == 0 {
		return 0, nil
	}
	return fmt.Fprint(s.w, a...)
}

func (s *speaker) println(a ...interface{}) (n int, err error) {
	if s.level == 0 {
		return 0, nil
	}
	return fmt.Fprintln(s.w, a...)
}

func (s *speaker) setLevel(n int) {
	s.level = n
}

func (s *speaker) error(a ...interface{}) (n int, err error) {
	fmt.Fprintf(os.Stderr, "error: ")
	return fmt.Fprintln(os.Stderr, a...)
}
