package argvpb

import (
	"fmt"
	"os"
	"time"

	"go.wit.com/lib/cobol"
)

// since we know when the command starts (duh, this parses os.Args)
// this is a convienent way to provide a standard exit format back
// to the shell that also has built in timing!

// also, it supports a custom Exit() back to your application

func GoodExit(msg string) {
	me.pb.GoodExit(msg)
}

func BadExit(msg string, err error) {
	me.pb.BadExit(msg, err)
}

func (pb *Argv) GoodExit(msg string) {
	go ExitWatchdog()
	if me.appExit != nil {
		me.appExit()
	}
	dur := time.Since(pb.Ctime.AsTime())
	var appname string
	if pb.AppInfo == nil {
		appname = os.Args[0]
	} else {
		appname = pb.AppInfo.APPNAME
	}
	fmt.Printf("%s: %s (%s)\n", appname, msg, cobol.FormatDuration(dur))
	os.Exit(0)
}

func (pb *Argv) BadExit(msg string, err error) {
	go ExitWatchdog()
	if me.appExit != nil {
		me.appExit()
	}
	// print out errors. this handles wrapped errors which is a useful
	if err != nil {
		if u, ok := err.(interface{ Unwrap() []error }); ok {
			// If it does, call the method to get the slice of errors.
			allerr := u.Unwrap()
			for _, e := range allerr {
				fmt.Printf("Error: (%v)\n", e)
			}
		} else {
			// If it's not a joined error, you can fall back to the single-unwrap loop.
			fmt.Printf("Error: (%v)\n", u)
		}
	}

	dur := time.Since(pb.Ctime.AsTime())
	var appname string
	if pb.AppInfo == nil {
		appname = os.Args[0]
	} else {
		appname = pb.AppInfo.APPNAME
	}
	fmt.Printf("%s error: %s (%s)\n", appname, msg, cobol.FormatDuration(dur))
	os.Exit(1)
}

// this code doesn't need to be this complicated. I put it here as reference code for myself so I could remember where it is.
func ExitWatchdog() {
	dog := time.NewTicker(5 * time.Second)
	defer dog.Stop()
	dogchan := make(chan bool)
	/*
		// this example would exit/destroy the ticker in 10 seconds
		go func() {
			time.Sleep(10 * time.Second)
			done <- true
		}()
	*/
	for {
		select {
		case <-dogchan:
			fmt.Println("Done!")
			return
		case t := <-dog.C:
			_ = t
			fmt.Println("argv.Exit() watchdog: stalled in", me.pb.AppInfo.APPNAME+".Exit()")
			// h.Scan()
		}
	}
}