package main

import (
	"bufio"
	"encoding/binary"
	"fmt"
	"net"
	"regexp"
	"strconv"
	"time"

	tb "gopkg.in/tucnak/telebot.v2"
)

type Client struct {
	ClientID  uint32
	Name      string
	Address   string
	CompanyID uint8
}

var (
	bot           *tb.Bot
	clients       map[uint32]*Client
	paused        bool = true
	forcePaused   bool = true
	forcePausedBy string

	githash    string
	buildstamp string
	commits    string
)

func main() {

	clients = make(map[uint32]*Client)

	conn, err := net.Dial("tcp", "poop.siteop.biz:3977")
	failError(err, "net.Dial")
	logInfoDebug("Connected to poop.siteop.biz:3977")

	//send auth
	p := PacketAdminJoin{
		Packet:     Packet{PType: AdminPacketAdminJoin},
		Password:   "plop",
		AppName:    "gottdad",
		AppVersion: "alpha",
	}
	_, err = conn.Write(p.Bytes())
	failError(err, "conn.Write")
	r := bufio.NewReader(conn)
	b := make([]byte, 0xFFFF)
	read := 0
	n := 0

	// Registering bot
	bot, err = tb.NewBot(tb.Settings{
		Token:  "954090437:AAEMYeUWGluKZRwXi_K3-T23ZVpFoqQAmu0",
		URL:    "https://api.telegram.org",
		Poller: &tb.LongPoller{Timeout: 10 * time.Second},
	})
	failError(err, "Registering bot")
	logInfoDebug("Connected to Telegram")

	go BotHandlers(bot)

	u := tb.User{
		ID: int(32173684),
	}
	bot.Send(&u, fmt.Sprintf("Started (%s-b%s - %s)", githash, commits, buildstamp))

	for {
		p := Packet{}

		for {
			if read >= 3 {
				//logInfoDebug("Packet read")
				break
			}
			n, err = r.Read(b[read:])
			logErrorDebug(err, "r.Read")
			read += n
			//logInfoDebug("Waiting for packet, read %d bytes.", read)

		}
		p.PLength = binary.LittleEndian.Uint16(b[0:])
		p.PType = b[2]
		if p.PLength <= 3 {
			logInfoAlert("Wrong packet length")
			break
		}

		//logInfoDebug("Waiting for packet data : len : %d / type : %d", p.PLength, p.PType)

		for {
			if read >= int(p.PLength) {
				//logInfoDebug("Data read")
				break
			}
			n, err = r.Read(b[read:])
			logErrorDebug(err, "r.Read")
			read += n
			//logInfoDebug("Waiting for data, read %d/%d bytes.", read, p.PLength)

		}

		switch p.PType {
		case AdminPacketServerProtocol:
			sp := PacketServerProtocol{
				Packet: p,
			}
			sp.Read(b[:p.PLength])
			logInfoDebug("AdminPacketServerProtocol :\n-  ProtocolVersion: %v\n-  FurtherData: %v\n-  UpdatePacketType: %v\n-  FrequenciesAllowed: %b", sp.ProtocolVersion, sp.FurtherData, sp.UpdatePacketType, sp.FrequenciesAllowed)
		case AdminPacketServerWelcome:
			sp := PacketServerWelcome{
				Packet: p,
			}
			sp.Read(b[:p.PLength])
			logInfoDebug("AdminPacketServerWelcome :\n-  ServerName: %v\n-  OpenTTDVersion: %v\n-  Dedicated: %v\n-  MapSeed: %x\n-  MapLandscape: %v\n-  MapStartDate: %v\n-  Size: %v x %v", sp.ServerName, sp.OpenTTDVersion, sp.Dedicated, sp.MapSeed, sp.MapLandscape, sp.MapStartDate, sp.MapX, sp.MapY)
			px := PacketAdminUpdateFrequency{
				Packet:          Packet{PType: AdminPacketAdminUpdateFrequency},
				UpdateType:      AdminUpdateDate,
				UpdateFrequency: AdminFrequencyDaily,
			}
			_, err = conn.Write(px.Bytes())

			px = PacketAdminUpdateFrequency{
				Packet:          Packet{PType: AdminPacketAdminUpdateFrequency},
				UpdateType:      AdminUpdateClientInfo,
				UpdateFrequency: AdminFrequencyAutomatic,
			}
			_, err = conn.Write(px.Bytes())

			px = PacketAdminUpdateFrequency{
				Packet:          Packet{PType: AdminPacketAdminUpdateFrequency},
				UpdateType:      AdminUpdateCompanyInfo,
				UpdateFrequency: AdminFrequencyAutomatic,
			}
			_, err = conn.Write(px.Bytes())

			px = PacketAdminUpdateFrequency{
				Packet:          Packet{PType: AdminPacketAdminUpdateFrequency},
				UpdateType:      AdminUpdateChat,
				UpdateFrequency: AdminFrequencyAutomatic,
			}
			_, err = conn.Write(px.Bytes())

			px = PacketAdminUpdateFrequency{
				Packet:          Packet{PType: AdminPacketAdminUpdateFrequency},
				UpdateType:      AdminUpdateConsole,
				UpdateFrequency: AdminFrequencyAutomatic,
			}
			_, err = conn.Write(px.Bytes())
		case AdminPacketServerDate:
			sp := PacketServerDate{
				Packet: p,
			}
			sp.Read(b[:p.PLength])
			logInfoDebug("AdminPacketServerDate :\n-  Date: %d\n-  RealDate : %v", sp.Date, toDate(sp.Date))
			paused = false
		case AdminPacketServerClientJoin:
			sp := PacketServerClientJoin{
				Packet: p,
			}
			sp.Read(b[:p.PLength])
			logInfoDebug("AdminPacketServerClientJoin :\n-  ClientID: %d", sp.ClientID)
			sendChat(-436055948, fmt.Sprintf("%s joining.", clients[sp.ClientID].Name))
		case AdminPacketServerClientInfo:
			sp := PacketServerClientInfo{
				Packet: p,
			}
			sp.Read(b[:p.PLength])
			//logInfoDebug("AdminPacketServerClientInfo :\n-  ClientID: %d\n-  Address: %s\n-  Name: %s\n-  Lang: %d\n-  Date: %d\n-  CompanyID: %d", sp.ClientID, sp.Address, sp.Name, sp.Lang, sp.Date, sp.CompanyID)
			clt := Client{
				ClientID:  sp.ClientID,
				Name:      sp.Name,
				Address:   sp.Address,
				CompanyID: sp.CompanyID,
			}
			clients[sp.ClientID] = &clt
			logInfoDebug("Clients : %v", clients)
		case AdminPacketServerClientError:
			sp := PacketServerClientError{
				Packet: p,
			}
			sp.Read(b[:p.PLength])
			logInfoDebug("AdminPacketServerClientError :\n-  ClientID: %d\n-  ErrorID: %d", sp.ClientID, sp.ErrorID)
		case AdminPacketServerClientQuit:
			sp := PacketServerClientQuit{
				Packet: p,
			}
			sp.Read(b[:p.PLength])
			logInfoDebug("AdminPacketServerClientQuit :\n-  ClientID: %d", sp.ClientID)
			if len(clients) == 2 && !paused {
				sendChat(-436055948, fmt.Sprintf("%s leaving. Game paused.", clients[sp.ClientID].Name))
			}
			delete(clients, sp.ClientID)
		case AdminPacketServerChat:
			sp := PacketServerChat{
				Packet: p,
			}
			sp.Read(b[:p.PLength])

			if sp.Message == "!unpause" {
				logInfoDebug("AdminPacketServerChat : Unpausing")
				forcePaused = false
				forcePausedBy = clients[sp.ClientID].Name
			} else if sp.Message == "!pause" {
				logInfoDebug("AdminPacketServerChat : Pausing")
				forcePaused = true
				forcePausedBy = clients[sp.ClientID].Name
			} else {
				logInfoDebug("AdminPacketServerChat :\n-  ActionID: %d\n-  DestinationID: %d\n-  ClientID: %d\n-  Message: %s\n-  Amount: %d", sp.ActionID, sp.DestinationID, sp.ClientID, sp.Message, sp.Amount)
			}
		case AdminPacketServerConsole:
			sp := PacketServerConsole{
				Packet: p,
			}
			sp.Read(b[:p.PLength])

			ok, err := regexp.MatchString("\\[udp\\] queried from .*", sp.Text)
			logErrorDebug(err, "queried from")
			if sp.Origin != "net" || ok == false {
				logInfoDebug("AdminPacketServerConsole :\n-  Origin: %q\n-  Text: %s", sp.Origin, sp.Text)
			}
		case AdminPacketServerRCon:
			sp := PacketServerRCon{
				Packet: p,
			}
			sp.Read(b[:p.PLength])

			ok, _ := regexp.MatchString("Client #[0-9]+  name: '.*'  company: [0-9]+  IP: .*", sp.Output)
			if ok {
				clt := Client{}
				r, _ := regexp.Compile("Client #(?P<ClientID>[0-9]+)  name: '(?P<Name>.*)'  company: (?P<CompanyID>[0-9]+)  IP: (?P<Address>.*)")
				ID64, _ := strconv.ParseInt(r.ReplaceAllString(sp.Output, "${ClientID}"), 10, 32)
				clt.ClientID = uint32(ID64)
				clt.Name = r.ReplaceAllString(sp.Output, "${Name}")
				if clt.Name == "" {
					clt.Name = "server"
				}
				ID64, _ = strconv.ParseInt(r.ReplaceAllString(sp.Output, "${CompanyID}"), 10, 8)
				clt.CompanyID = uint8(ID64)
				clt.Address = r.ReplaceAllString(sp.Output, "${Address}")
				clients[clt.ClientID] = &clt
			} else {
				logInfoDebug("AdminPacketServerRCon :\n-  ColorID: %d\n-  Output: %s", sp.ColorID, sp.Output)
			}
		case AdminPacketServerRConEnd:
			sp := PacketServerRConEnd{
				Packet: p,
			}
			sp.Read(b[:p.PLength])

			if sp.Command == "clients" {
				for k, v := range clients {
					logInfoDebug("Client[%d] : %s - %d (%s)", k, v.Name, v.CompanyID, v.Address)
				}
			} else {
				logInfoDebug("AdminPacketServerRConEnd :\n-  Command: %s", sp.Command)
			}
		default:
			logInfoDebug("Packet fully read : len : %d / type : %d", p.PLength, p.PType)
		}

		c := make([]byte, 0xFFFF)
		copy(c, b[p.PLength:])
		b = c
		read -= int(p.PLength)

		if len(clients) == 0 {
			px := PacketAdminRCon{
				Packet:  Packet{PType: AdminPacketAdminRCon},
				Command: "clients",
			}
			_, err = conn.Write(px.Bytes())
		}

		if !paused && forcePaused {
			paused = true
			px := PacketAdminRCon{
				Packet:  Packet{PType: AdminPacketAdminRCon},
				Command: "pause",
			}
			_, err = conn.Write(px.Bytes())
			logInfoDebug("Force pausing")
			if pausedBy != "" {
				sendChat(-436055948, fmt.Sprintf("Game paused by %s", pausedBy))
				pausedBy = ""
			}
		}
		if paused && !forcePaused && len(clients) > 1 { // server is client #1
			paused = false
			px := PacketAdminRCon{
				Packet:  Packet{PType: AdminPacketAdminRCon},
				Command: "unpause",
			}
			_, err = conn.Write(px.Bytes())
			logInfoDebug("Force unpausing")
			if pausedBy != "" {
				sendChat(-436055948, fmt.Sprintf("Game unpaused by %s", pausedBy))
				pausedBy = ""
			}
		}
		if !paused && len(clients) == 1 { // server is client #1
			paused = true
			px := PacketAdminRCon{
				Packet:  Packet{PType: AdminPacketAdminRCon},
				Command: "pause",
			}
			_, err = conn.Write(px.Bytes())
			logInfoDebug("Pausing")
			sendChat(-436055948, "No players. Game paused.")

		}
	}

}