package main

import (
	"flag"
	"fmt"
	"os"
	"os/signal"
	"syscall"

	"github.com/bwmarrin/discordgo"
)

var (
	Token string
)

func init() {
	flag.StringVar(&Token, "t", "", "Bot Token")
	flag.Parse()
}

func main() {

	session, err := discordgo.New("Bot " + Token)
	if err != nil {
		fmt.Println("error creating Discord session,", err)
		return
	}

	session.AddHandler(messageCreate)

	session.Identify.Intents = discordgo.IntentsGuildMessages

	err = session.Open()
	if err != nil {
		fmt.Println("error opening connection,", err)
		return
	}

	fmt.Println("Bot is now running. Press CTRL-C to exit.")
	sc := make(chan os.Signal, 1)
	signal.Notify(sc, syscall.SIGINT, syscall.SIGTERM, os.Interrupt)
	<-sc

	session.Close()
}

func messageCreate(s *discordgo.Session, m *discordgo.MessageCreate) {

	if m.Author.ID == s.State.User.ID {
		return
	}
	fmt.Println(m.Content)
	if m.Content != "ping" {
		return
	}

	channel, err := s.UserChannelCreate(m.Author.ID)
	if err != nil {

		fmt.Println("error creating channel:", err)
		s.ChannelMessageSend(
			m.ChannelID,
			"Something went wrong while sending the DM!",
		)
		return
	}
	_, err = s.ChannelMessageSend(channel.ID, "Pong!")

	if err != nil {

		fmt.Println("error sending DM message:", err)
		s.ChannelMessageSend(
			m.ChannelID,
			"Failed to send you a DM. "+
				"Did you disable DM in your privacy settings?",
		)
	}
}