package bot

import (
	"fmt"
	"log"
	"os"
	"strconv"
	"time"
)

var quitTimer chan bool

func HandleCmd(cmd []string) {
	cmdReceived := cmd[0]
	log.Printf("bot: %s command received", cmdReceived)

	switch cmdReceived {
	case "timer":
		seconds, err := strconv.Atoi(cmd[1])

		if err != nil {
			log.Fatal("err: invalid command arguments")
		}

		if quitTimer != nil {
			quitTimer <- true

		}

		quitTimer = make(chan bool)

		go func() {
			filename := "F:/Media/Twitch/Bot/timer.txt"

			file, err := os.Create(filename)

			if err != nil {
				log.Fatal(err)
			}

			defer file.Close()

			countdown := time.Duration(seconds) * time.Second
			ticker := time.NewTicker(time.Second)
			defer ticker.Stop()

			log.Printf("bot: timer started with duration %d seconds", seconds)

			for countdown > 0 {
				select {
				case <-ticker.C:
					totalSeconds := int(countdown.Seconds())
					minutes := totalSeconds / 60
					seconds := totalSeconds % 60
					countdownMsg := fmt.Sprintf("%02d:%02d", minutes, seconds)

					file.Seek(0, 0)
					_, err = file.WriteString("")

					if err != nil {
						log.Fatal(err)
					}

					_, err = file.WriteString(countdownMsg)

					if err != nil {
						log.Fatal(err)
					}

					log.Printf("bot: timer updated to %s", countdownMsg)

					countdown -= time.Second
				case <-quitTimer:
					file.Seek(0, 0)
					_, err = file.WriteString("")

					if err != nil {
						log.Fatal(err)
					}

					log.Println("bot: timer stopped")

					return
				}
			}
		}()
	}
}