package main

import "log"
import "fmt"
import "os"
import "time"
import "os/user"
import "runtime"
import "runtime/debug"

// this is the king of dns libraries
import "github.com/miekg/dns"

import "git.wit.com/wit/gui"
import pb "git.wit.com/wit/witProtobuf"
import "git.wit.com/jcarr/dnssecsocket"

import "github.com/gobuffalo/packr"
import "github.com/davecgh/go-spew/spew"

// will try to get this hosts FQDN
import "github.com/Showmax/go-fqdn"

var GITCOMMIT	string	// this is passed in as an ldflag
var GOVERSION	string	// this is passed in as an ldflag
var BUILDTIME	string	// this is passed in as an ldflag

// reminder to use this for JSON
// https://github.com/tidwall/gjson
//   value := gjson.Get(json, "name.last")
//   println(value.String())
//   value := gjson.Get(json, friends.#[last=="Murphy"].first)

// use mergo to merge structs
// import "github.com/imdario/mergo"
// mergo.Merge(&dest, src)

// always sorted slice (new project)
// https://github.com/yaa110/sslice

// several smart slice functions (new project. April 2019)
// https://github.com/elliotchance/pie

func onExit(err error) {
	log.Println("Sleep for 1 second")
	time.Sleep(1 * 1000 * 1000 * 1000)

	// save the protobuf.Config as a JSON config file
	saveConfig()

	if (err != nil) {
		panic(err)
	}

	os.Exit(0)
}

var packrBox packr.Box

func lookupAAAA(hostname string) string {
	// lookup the IP address from DNS
	dnsRR := dnssecsocket.Dnstrace(hostname, "AAAA")
	spew.Dump(dnsRR)
	if (dnsRR == nil) {
		return "BROKEN"
	}
	ipaddr := dns.Field(dnsRR, 1)
	log.Println("ipaddr", ipaddr)
	return ipaddr
}

func main() {
	// This puts all the files in that directory in the binary
	// This directory includes the default config file if there is not already one
	packrBox = packr.NewBox("./resources")

	// This will parse the command line and config file
	// This uses a protobuf definition and then Marshal's
	// and unmarshal's that into a JSON config file
	// that is human readable and editable. This is the easy way
	// to pass around a configuration structure throughout a
	// golang application IMHO
	parseConfig()

	for key, foo := range config.Accounts  {
		log.Println("FOUND ACCOUNT = ", key, foo)
	}
	// pass a pointer to the config so the gui can access it
	gui.Data.Config = config

	initChannel()
	go processEvents()

	go gorillaDial("v000185.testing.com.customers.wprod.wit.com:9000")
	go watchGUI()

	user, err := user.Current()
	if err != nil {
		onExit(err)
	}

	gui.Data.Width		= int(config.Width)
	gui.Data.Height		= int(config.Height)

	// use this to discover what the OS thinks it's hostname is
	// seems to be cross platform (?)
	hostname := fqdn.Get()
	log.Println("fqdn.Get() = ", hostname)
	gui.Data.Hostname	= hostname

	// this is a recursive dig for the AAAA record
	// TODO: check for dns hijacking
	ipAAAA := lookupAAAA(hostname)
	gui.Data.IPv6		= ipAAAA

	gui.Data.Version	= "v0.7"
	gui.Data.GitCommit	= GITCOMMIT
	gui.Data.GoVersion	= GOVERSION
	gui.Data.Buildtime	= BUILDTIME
	gui.Data.MouseClick     = mainMouseClick
	gui.Data.HomeDir	= user.HomeDir

	// Set output debugging level
	gui.Data.Debug		= config.Debugging
	gui.Data.DebugTable	= config.Debugtable
	log.Println("gui.Data.Debug = ", gui.Data.Debug)
	log.Println("gui.Data.DebugTable = ", gui.Data.DebugTable)

	// Current User
	log.Println("Hi " + user.Name + " (id: " + user.Uid + ")")
	log.Println("Username: " + user.Username)
	log.Println("Home Dir: " + user.HomeDir)

	// Get "Real" User under sudo.
	// More Info: https://stackoverflow.com/q/29733575/402585
	log.Println("Real User: " + os.Getenv("SUDO_USER"))

	// make this the main loop in an attempt to figure out the crashes
	// do not change this until the GUI is stable
	gui.GoMainWindow()
}

// This is the handler for all mosue clicks (buttons, areas, etc))
func mainMouseClick(b *gui.ButtonMap) {
	log.Println("mainMouseClick() b =", b)

	if (b == nil) {
		log.Println("main() BACK IN CONTROL PANEL CODE (button is nil) WHY DID THIS HAPPEN?")
		log.Println("main() BACK IN CONTROL PANEL CODE (button is nil) WHY DID THIS HAPPEN?")
		log.Println("main() BACK IN CONTROL PANEL CODE (button is nil) WHY DID THIS HAPPEN?")
	} else {
		gui.Data.Current = b.Account
		log.Println("mainMouseClick() setting current account = ", b.Account)

		log.Println("main() BACK IN CONTROL PANEL CODE (button =", b, ")")
		if (b.Action == "BACK") {
			gui.Data.State = "splash"
		} else if (b.Action == "QUIT") {
			onExit(nil)
		} else if (b.Action == "CREATE") {
			log.Println("TRY TO ADD A NEW VIRTUAL MACHINE")
			log.Println("\tTRIGGER CREATE VM")
			gui.Data.State   = "CREATE"
		} else if (b.Action == "CONFIG") {
			loadDefaultConfig()
			gui.Data.State = "done"
		} else if (b.Action == "DEBUG") {
			log.Println("debug.PrintStack() (SHOULD BE JUST THIS goroutine)")
			debug.PrintStack()
		} else if (b.Action == "DEBUG FULL") {
			log.Println("ATTEMPT FULL STACK DUMP")
			buf := make([]byte, 1<<16)
			runtime.Stack(buf, true)
			log.Printf("%s", buf)
			log.Println("FINISHED FULL STACK DUMP")
		} else if (b.Action == "ADD") {
			log.Println("\tSHOULD ADD ACCOUNT HERE")
			if (gui.Data.CurrentTab != nil) {
			if (gui.Data.CurrentTab.EntryNick != nil) {
				nick     := gui.Data.CurrentTab.EntryNick.Text()
				username := gui.Data.CurrentTab.EntryUser.Text()
				password := gui.Data.CurrentTab.EntryPass.Text()
				log.Println("\tEntryNick =", nick)
				log.Println("\tEntryName =", username)
				log.Println("\tEntryPass =", password)

				acc := new(pb.Account)
				acc.Nick = nick
				acc.Username = username
				acc.Password = password

				config.Accounts = append(config.Accounts, acc)
			}
			}
		} else if (b.Action == "LOGIN") {
			log.Println("\tTRIGGER LOGIN ACCOUNT")
			gui.Data.State   = "SEND LOGIN"
			count := 0
			for {
				log.Println("Sleep() in buttonClick() gui.Data.State =", gui.Data.State)
				time.Sleep(200 * time.Millisecond)
				if (gui.Data.State == "NEW PROTOBUF") {
					if (currentMessage == nil) {
						gui.SocketError()
						gui.Data.State = "done"
					} else {
						log.Println("LOGIN currentMessage =", currentMessage)
						if (currentMessage.Type == pb.Event_OK) {
							log.Println("LOGIN WAS OK!")
							log.Println("LOGIN WAS OK!")
							log.Println("LOGIN WAS OK!")
							msg := "On account " + b.Account.Nick + "\n"
							gui.MessageWindow("Login OK", msg)
						}
						if (currentMessage.Type == pb.Event_FAIL) {
							log.Println("LOGIN FAILED")
							log.Println("LOGIN FAILED")
							log.Println("LOGIN FAILED")
							msg := "On account " + b.Account.Nick + "\n"
							msg += "pb.Comment = " + currentMessage.Comment + "\n"
							msg += "pb.Id = " + fmt.Sprintf("%d", currentMessage.Id) + "\n"
							msg += "pb.Email = " + currentMessage.Email + "\n"
							msg += "pb.Username = " + currentMessage.Username + "\n"
							gui.ErrorWindow("Login Failed", msg)
						}
						currentMessage = nil
						gui.Data.State = "done"
					}
					return
				}
				count += 1
				if (count > 10) {
					log.Println("ERROR: waited too long for a resposne")
					currentMessage = nil
					gui.Data.State = "done"
					return
				}
			}
		} else if (b.Action == "SHOW") {
			log.Println("\tTRIGGER DISPLAY ACCOUNT")
			gui.Data.State   = "SEND WEBSOCKET"
			count := 0
			for {
				log.Println("Sleep() in buttonClick() gui.Data.State =", gui.Data.State)
				time.Sleep(200 * time.Millisecond)
				if (gui.Data.State == "NEW PROTOBUF") {
					if (currentMessage == nil) {
						gui.SocketError()
						gui.Data.State = "done"
					} else {
						count := countVMS(currentMessage)
						log.Println("SHOW VMS currentMessage =", currentMessage)
						log.Println("SHOW VMS count =", count)
						if (count != 0) {
							name := "Virtual Machines (" + b.Account.Nick + ")"
							mh := gui.AddVmsTab(name, count, b.Account)
							ReadReceivedData(currentMessage, mh)
						}
						currentMessage = nil
						gui.Data.State = "done"
					}
					return
				}
				count += 1
				if (count > 10) {
					log.Println("ERROR: waited too long for a resposne")
					currentMessage = nil
					gui.Data.State = "done"
					return
				}
			}
		}
	}
	if (gui.Data.State == "splash") {
		gui.ShowAccountQuestionTab()
		gui.Data.State = "account1"
		return
	} else if (gui.Data.State == "account1") {
		gui.ShowAccountTab()
		gui.Data.State = "main"
	} else if (gui.Data.State == "main") {
		gui.ShowMainTab()
		gui.Data.State = "done"
	} else if (gui.Data.State == "QUIT") {
		onExit(nil)
	}
}

// this watches the GUI primarily to process protobuf's
func watchGUI() {
	count := 0

	for {
		if (count > 10) {
			log.Println("Sleep() in watchGUI() gui.Data.State =", gui.Data.State)
			count = 0
		}
		count += 1
		time.Sleep(200 * time.Millisecond)

		if (gui.Data.State == "SEND WEBSOCKET") {
			event := pb.MakeGetEvent()
			if (gui.Data.Current == nil) {
				event.Token    = gui.Data.Current.Token
				event.Username = gui.Data.Current.Username
			}
			log.Println("\tTRIGGERING WEBSOCKET pb.MakeGetEvent()  event.Token =", event.Token)

			gorillaSendProtobuf(event)
			gui.Data.State = "READ PROTOBUF"
		}
		if (gui.Data.State == "SEND LOGIN") {
			event := pb.MakeLoginEvent()
			if (gui.Data.Current == nil) {
				event.Token    = gui.Data.Current.Token
				event.Username = gui.Data.Current.Username
				event.Password = gui.Data.Current.Password
			}
			log.Println("\tTRIGGERING LOGIN HERE pb.MakeLoginEvent() event.Token =", event.Token)
			gorillaSendProtobuf(event)
			gui.Data.State = "READ PROTOBUF"
		}
		if (gui.Data.State == "CREATE") {
			log.Println("\tTRIGGERING CREATE HERE")
			event := pb.MakeAddVmEvent()
			if (gui.Data.Current == nil) {
				event.Token    = gui.Data.Current.Token
				event.Username = gui.Data.Current.Username
			}
			log.Println("\tTRIGGERING CREATE HERE with event.Token =", event.Token)

			spew.Dump(event)
			gorillaSendProtobuf(event)

			log.Println("\tEVENT SENT TO GORILLA WEBSOCKET")
			gui.Data.State = "READ PROTOBUF"
		}
		if (gui.Data.State == "kill") {
			log.Println("gui.State = kill")
			log.Println("gui.State = kill")
			log.Println("gui.State = kill")
			os.Exit(0)
		}
		if (gui.Data.State == "splash") {
			for key, _ := range config.Accounts  {
				log.Println("gui.State = splash BUT THERE IS AN ACCOUNT  Nick = ", config.Accounts[key].Nick)
				log.Println("gui.State = splash BUT THERE IS AN ACCOUNT  Username = ", config.Accounts[key].Username)
				log.Println("SETTING gui.State = main")
				gui.Data.State = "main";
			}
		}
	}
}