package config

import (
	"log"
	"os"
	"os/exec"
	"time"
)

var Cfg Config

func Init() {
	Cfg = New()

	cfgInfo, err := getStructInfo(&Cfg)
	if err != nil {
		log.Fatalf("Unable to initialize program: %v", err)
	}

	// get command line flags
	if err := Cfg.parseFlags(cfgInfo); err != nil {
		log.Fatalf("Unable to initialize program: %v", err)
	}

	// set logging Level
	setLogLevel(&Cfg)

	// set timezone & time format
	Cfg.TZUTC, _ = time.LoadLocation("UTC")
	Cfg.TZLocal, err = time.LoadLocation(Cfg.TimeZoneLocal)
	if err != nil {
		Cfg.Log.Error("Unable to parse timezone string", "error", err)
		os.Exit(1)
	}

	// check to see if nsupdate is installed
	cmd := "command -v nsupdate"
	if err := exec.Command("/usr/bin/env", "sh", "-c", cmd).Run(); err != nil {
		panic("nsupdate is not installed")
	}

	// print running config
	printRunningConfig(&Cfg, cfgInfo)
}