package main

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

type iostreams struct {
	Err io.Writer
	Out io.Writer
}

type Opts struct {
	ConfigPath string
	IO         iostreams
}

func main() {
	var configFlag = flag.String("config", "config.yml", "A path to a config file.")
	flag.Parse()
	opts := Opts{
		ConfigPath: *configFlag,
		IO: iostreams{
			Err: os.Stderr,
			Out: os.Stdout,
		},
	}

	err := _main(opts)
	if err != nil {
		fmt.Fprintf(os.Stderr, "failed: %s", err)
	}
}

func _main(opts Opts) error {
	cfg, err := parseConfig(opts.ConfigPath)
	if err != nil {
		fmt.Fprintf(os.Stderr, "could not read config file '%s'", opts.ConfigPath)
		os.Exit(1)
	}

	fmt.Printf("DBG %#v\n", cfg.InstanceName)

	return nil
}