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package main

import (
	"fmt"
	"log"
	"strings"
	"time"

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

type Commander interface {
	irc.Handler
	fmt.Stringer
	Timeout(string) bool
	WithArgs(int) bool
}

type Command struct {
	Help string
	Arg  string
	Last map[string]time.Time
}

var commands = make(map[string]Commander)

func Register(cmd string, f Commander) {
	commands[cmd] = f
}

func (v Command) String() string { return v.Help }
func (v *Command) Timeout(nick string) bool {
	defer func() { v.Last[nick] = time.Now() }()
	if v.Last == nil {
		v.Last = make(map[string]time.Time)
	}
	if last, ok := v.Last[nick]; ok {
		if time.Since(last) < time.Minute {
			log.Println(nick, "timeout", time.Since(last))
			return true
		}
	}
	return false
}
func (_ Command) WithArgs(n int) bool { return n == 1 }

func Dispatch(conn *irc.Conn, line *irc.Line) {
	if f := strings.Fields(line.Text()); len(f) > 0 {
		cmd := strings.ToLower(f[0])
		if c, ok := commands[cmd]; ok {
			if c.WithArgs(len(f)) &&
				!(line.Public() && c.Timeout(line.Nick)) {
				log.Println(line.Nick, f)
				c.Handle(conn, line)
			}
		}
	}
}