package main

import (
	"os"
	"os/signal"
	"syscall"
	"time"
)

func main() {
	config, err := NewConfig()
	if err != nil {
		panic(err)
	}

	k, err := NewKeyboard()
	if err != nil {
		panic(err)
	}
	go k.Listen()
	defer k.Close()

	tp := NewTickPrinter(config.Interval)
	go tp.Start()
	defer tp.Stop()

	timer, err := NewTimer(config)
	if err != nil {
		panic(err)
	}
	tp.Message <- timer.String

	sigc := make(chan os.Signal)
	signal.Notify(sigc, syscall.SIGINT, syscall.SIGQUIT, syscall.SIGTERM)

	go listen(k, tp, timer, func() { close(sigc) })

	select {
	case <-sigc:
	}
}

func listen(k *Keyboard, tp *TickPrinter, timer *Timer, stop func()) {
	for {
		key := <-k.Events
		switch key {
		case 'a':
			timer.Add(time.Second)
		case 'A':
			timer.Add(time.Minute)
		case 's':
			timer.Sub(time.Second)
		case 'S':
			timer.Sub(time.Minute)
		case 'p':
			tp.Flush()
			timer.TogglePause()
		case 'z':
			tp.Flush()
		case 'r':
			tp.Flush()
			timer.Reset()
		case 'q':
			stop()
			return
		}
	}
}