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package main

import (
	"flag"
	"log"
	"sort"
	"strings"

	irc "github.com/fluffle/goirc/client"
)

var (
	server = flag.String("server", "irc.freenode.org:6667", "IRC Server")
	room   = flag.String("room", "#lor", "IRC Channel")
	name   = flag.String("name", "dim13", "Bots Name")
)

func MedianLength(v []string) int {
	if len(v) == 0 {
		return 0
	}
	l := make([]int, len(v))
	for i, s := range v {
		l[i] = len(s)
	}
	sort.Sort(sort.IntSlice(l))
	return l[len(l)/2]
}

func privmsg(conn *irc.Conn, line *irc.Line) {
	f := strings.Fields(line.Text())

	if line.Public() && line.Nick != conn.Me().Nick {
		buffer.Value = line
		buffer = buffer.Next()
		Count(line.Nick)
	}

	// lookup command
	if len(f) > 0 {
		cmd := strings.ToLower(f[0])
		if c, ok := commands[cmd]; ok {
			if c.WithArgs(len(f)) && !(line.Public() && c.Timeout()) {
				log.Println(line.Nick, f)
				go c.Handle(conn, line)
			}
		}
	}

	// extract single link and fetch title
	for _, v := range f {
		if strings.HasPrefix(v, "http") {
			go func(url string) {
				log.Println(line.Nick, url)
				t, err := FetchTitle(url)
				if err != nil {
					log.Println(err)
				}
				if t != "" {
					conn.Privmsg(line.Target(), "Title: "+t)
				}
			}(v)
		}
	}

	if m := MedianLength(f); len(f) > 4 && m < 2 {
		log.Println("kick", line.Nick)
		conn.Kick(*room, line.Nick, "flood")
	}
}

func main() {
	flag.Parse()

	c := irc.SimpleClient(*name)
	c.EnableStateTracking()

	quit := make(chan bool)
	c.HandleFunc(irc.DISCONNECTED,
		func(conn *irc.Conn, line *irc.Line) { quit <- true })

	c.HandleFunc(irc.CONNECTED,
		func(conn *irc.Conn, line *irc.Line) { conn.Join(*room) })

	c.HandleFunc(irc.PRIVMSG, privmsg)

	if err := c.ConnectTo(*server); err != nil {
		log.Fatal(err)
	}

	go autoSave()

	<-quit
}