package main

import (
	"bytes"
	"log"
	"os"
	"os/exec"
	"strings"
	"time"

	"github.com/lrstanley/girc"
)

func main() {
	// OWNER NICK
	owner := "ahriman"
	// INITIAL CHANNEL
	nchannel := "#goofbot"
	// CLIENT CONFIG
	client := girc.New(girc.Config{
		Server: "irc.tilde.chat",
		Port:   6697,
		Nick:   "goofbot",
		User:   "goofbot",
		Name:   "Goofus McBotus",
		Out:    os.Stdout,
		SSL:    true,
	})

	// specify the channel to join on startup
	// for multiple channels: ("#goofbot", "#goofbot2", "#goofbot3")
	client.Handlers.Add(girc.CONNECTED, func(c *girc.Client, e girc.Event) {
		c.Cmd.Join(nchannel)
	})

	// basic command-response handler
	client.Handlers.Add(girc.PRIVMSG, func(c *girc.Client, e girc.Event) {
		if strings.HasPrefix(e.Last(), "!hello") {
			c.Cmd.ReplyTo(e, "henlo good fren!!")
			return
		}

		// check if the command was issued by a specific person before dying
		// i had to delve into girc/event.go to find e.Source.Name
		if strings.HasPrefix(e.Last(), "die, devil bird!") && e.Source.Name == owner {
			c.Cmd.Reply(e, "SQUAWWWWWK!!")
			time.Sleep(100 * time.Millisecond)
			c.Close()
			return
		}
		//another basic command/response. required information for the tildeverse
		if strings.HasPrefix(e.Last(), "!botlist") {
			c.Cmd.Reply(e, "Creator: ~a h r i m a n~ :: I'm the assistance bot for tilde.institute. Commands: !hello")
			return
		}
		// when requested by owner, join channel specified
		if strings.HasPrefix(e.Last(), "!join") && e.Source.Name == owner {
			dest := strings.Split(e.Params[1], " ")
			c.Cmd.Reply(e, "Right away, cap'n!")
			time.Sleep(100 * time.Millisecond)
			c.Cmd.Join(dest[1])
		}
		// respond with uptime / load
		if strings.HasPrefix(e.Last(), "!uptime") {
			uptime := exec.Command("uptime")
			var out bytes.Buffer
			uptime.Stdout = &out
			err := uptime.Run()
			if err != nil {
				log.Fatalln("Error while running 'uptime'")
			}
			c.Cmd.Reply(e, out.String())
			return
		}
		// respond with currently connected users
		// TODO: prepend names with _ to avoid pings in irc
		if strings.HasPrefix(e.Last(), "!users") {
			users := exec.Command("who", "-q")
			var out bytes.Buffer
			users.Stdout = &out
			err := users.Run()
			if err != nil {
				log.Fatalln("Error while running 'who -q'")
			}
			c.Cmd.Reply(e, out.String())
			return
		}
	})

	// if err is not nothing, eg, if there's an error
	if err := client.Connect(); err != nil {
		log.Fatalf("an error occurred while attempting to connect to %s: %s", client.Server(), err)
	}
	//TODO: figure out sigint handling
	//	ctrlc := make(chan os.Signal, 1)
	//	signal.Notify(ctrlc, os.Interrupt)
	//	go func() {
	//		<-ctrlc
	//		client.Close()
	//		os.Exit(1)
	//	}()
}