package cli

import (
	"flag"
	"fmt"
	"io"
	"os"
	"strings"
)

type RoutesClearDeps struct {
	Clear  func() (ok bool, message string)
	Stdout io.Writer
	Stderr io.Writer
}

func RunRoutesClear(args []string, deps RoutesClearDeps) int {
	if deps.Clear == nil {
		return 1
	}
	stdout := deps.Stdout
	if stdout == nil {
		stdout = os.Stdout
	}
	stderr := deps.Stderr
	if stderr == nil {
		stderr = os.Stderr
	}

	fs := flag.NewFlagSet("routes-clear", flag.ContinueOnError)
	fs.SetOutput(stderr)
	if err := fs.Parse(args); err != nil {
		return 2
	}

	ok, message := deps.Clear()
	if ok {
		fmt.Fprintln(stdout, strings.TrimSpace(message))
		return 0
	}
	msg := strings.TrimSpace(message)
	if msg == "" {
		msg = "routes clear failed"
	}
	fmt.Fprintln(stderr, msg)
	return 1
}