package main

import "net"

const (
	VERSION = "1.1.1"
)

type Server struct {
	eventChan   chan Event
	running     bool
	name        string
	clientMap   map[string]*Client  //Map of nicks → clients
	channelMap  map[string]*Channel //Map of channel names → channels
	operatorMap map[string]string   //Map of usernames → SHA1 hashed passwords
	motd        string
}

type Client struct {
	server     *Server
	connection net.Conn
	signalChan chan signalCode
	outputChan chan string
	nick       string
	key        string
	registered bool
	connected  bool
	operator   bool
	channelMap map[string]*Channel
}

type eventType int

const (
	connected eventType = iota
	disconnected
	command
)

type Event struct {
	client *Client
	input  string
	event  eventType
}

type Channel struct {
	name      string
	topic     string
	clientMap map[string]*Client
	mode      ChannelMode
	modeMap   map[string]*ClientMode
}

type ChannelMode struct {
	secret      bool //Channel is hidden from LIST
	topicLocked bool //Only ops may change topic
	moderated   bool //Only ops and voiced may speak
	noExternal  bool //Only users in the channel may talk to it
}

func (m *ChannelMode) String() string {
	modeStr := ""
	if m.secret {
		modeStr += "s"
	}
	if m.topicLocked {
		modeStr += "t"
	}
	if m.moderated {
		modeStr += "m"
	}
	if m.noExternal {
		modeStr += "n"
	}
	return modeStr
}

type ClientMode struct {
	operator bool //Channel operator
	voice    bool //Has voice
}

func (m *ClientMode) Prefix() string {
	if m.operator {
		return "@"
	} else if m.voice {
		return "+"
	} else {
		return ""
	}
}

func (m *ClientMode) String() string {
	modeStr := ""
	if m.operator {
		modeStr += "o"
	}
	if m.voice {
		modeStr += "v"
	}
	return modeStr
}

type signalCode int

const (
	signalStop signalCode = iota
)

type replyCode int

const (
	rplWelcome replyCode = iota
	rplJoin
	rplPart
	rplTopic
	rplNoTopic
	rplNames
	rplEndOfNames
	rplNickChange
	rplKill
	rplMsg
	rplList
	rplListEnd
	rplOper
	rplChannelModeIs
	rplKick
	rplInfo
	rplVersion
	rplMOTDStart
	rplMOTD
	rplEndOfMOTD
	rplPong
	errMoreArgs
	errNoNick
	errInvalidNick
	errNickInUse
	errAlreadyReg
	errNoSuchNick
	errUnknownCommand
	errNotReg
	errPassword
	errNoPriv
	errCannotSend
)