package main

import (
	libpeer "cwtch.im/cwtch/peer"
	"cwtch.im/cwtch/peer/connections"
	"encoding/base32"
	"fmt"
	"github.com/sethvargo/go-diceware/diceware"
	"github.com/therecipe/qt/core"
	"github.com/therecipe/qt/quick"
	"github.com/therecipe/qt/quickcontrols2"
	"github.com/therecipe/qt/widgets"
	"os"
	"os/user"
	"path"
	"strings"
	"time"
	"strconv"
	"git.openprivacy.ca/openprivacy/asaur"
	"git.openprivacy.ca/openprivacy/libricochet-go/application"
	"git.openprivacy.ca/openprivacy/libricochet-go/channels"
	"log"
	"cwtch.im/cwtch/model"
	"encoding/hex"
	"cwtch.im/cwtch/app"
)

var gcd *GrandCentralDispatcher

type ContactManager map[string]*Contact

var contactMgr ContactManager
var peer libpeer.CwtchPeer
var outgoingMessages chan Message

// need this to translate from the message IDs the UI uses to the ones the acknowledgement system uses on the wire
var acknowledgementIDs map[uint32]uint

type Contact struct {
	Messages []Message
	Unread   int
	Status   connections.ConnectionState
}

func (this *Contact) AddMessage(m Message) {
	this.Messages = append(this.Messages, m)
}

type Message struct {
	With, Message string
	FromMe        bool
	MessageID     uint
	Timestamp     time.Time
}

func DeliverMessageToUI(handle, from, displayname, message string, mID uint, fromMe bool, ts time.Time) {
	_, found := contactMgr[handle]
	if !found {
		contactMgr[handle] = &Contact{[]Message{}, 0, 0}
	}

	contactMgr[handle].AddMessage(Message{from, message, fromMe, mID, ts})
	if gcd.currentOpenConversation == handle {
		if fromMe {
			from = "me"
		}
		gcd.AppendMessage(from, message, displayname, mID, ts.Format(TIME_FORMAT), randomProfileImage(from))
	} else {
		contactMgr[handle].Unread++
		gcd.SetUnread(handle, contactMgr[handle].Unread)
	}
}

func init() {
	GrandCentralDispatcher_QmlRegisterType2("CustomQmlTypes", 1, 0, "GrandCentralDispatcher")
}

func main() {
	contactMgr = make(ContactManager)
	acknowledgementIDs = make(map[uint32]uint)

	core.QCoreApplication_SetAttribute(core.Qt__AA_EnableHighDpiScaling, true)
	widgets.NewQApplication(len(os.Args), os.Args)
	quickcontrols2.QQuickStyle_SetStyle("Universe")
	view := quick.NewQQuickView(nil)
	view.SetResizeMode(quick.QQuickView__SizeRootObjectToView)
	view.SetMinimumHeight(280)
	view.SetMinimumWidth(300)
	view.SetTitle("cwtch")
	gcd = NewGrandCentralDispatcher(nil)
	view.RootContext().SetContextProperty("gcd", gcd)

	if len(os.Args) == 2 && os.Args[1] == "local" {
		view.SetSource(core.QUrl_FromLocalFile("./qml/main.qml"))
	} else {
		view.SetSource(core.NewQUrl3("qrc:/qml/main.qml", 0))
	}

	outgoingMessages = make(chan Message, 1000)
	go postmanPat()

	initialize(view)
	view.Show()
	go torStatusPoller()
	go presencePoller()
	go groupPoller()
	go ricochetListener()
	widgets.QApplication_Exec()
}

func groupPoller() {
	for {
		time.Sleep(time.Second * 4)

		servers := peer.GetServers()
		groups := peer.GetGroups()
		for i := range groups {
			group := peer.GetGroup(groups[i])
			//log.Printf("setting group %s to status %d", groups[i], int(servers[group.GroupServer]))
			gcd.SetConnectionStatus(groups[i], int(servers[group.GroupServer]))
		}
	}
}

func presencePoller() { // TODO: make this subscribe-able in ricochet
	time.Sleep(time.Second * 4)
	for {
		contacts := peer.GetContacts()
		for i := range contacts {
			_, found := contactMgr[contacts[i]]
			if !found { // new contact has attempted to connect with us, treat it as an invite
				contactMgr[contacts[i]] = &Contact{[]Message{}, 0, -1}
				c, _ := peer.GetProfile().GetContact(contacts[i])
				peer.GetProfile().SetCustomAttribute(contacts[i]+"_name", c.Name)
				peer.GetProfile().SetCustomAttribute(c.Name+"_onion", contacts[i])
				peer.Save()
				gcd.AddContact(c.Name, contacts[i], "", randomProfileImage(contacts[i]), "0", c.Trusted)
			}

			c, found := peer.GetPeers()[contacts[i]]
			if !found && contactMgr[contacts[i]].Status != -2 {
				//log.Printf("setting %v to -2", contacts[i])
				contactMgr[contacts[i]].Status = -2
				gcd.SetConnectionStatus(contacts[i], -2)
			} else if contactMgr[contacts[i]].Status != c {
				//log.Printf("was: %v", contactMgr[contacts[i]].Status)
				contactMgr[contacts[i]].Status = c
				//log.Printf("setting %v to status %v", contacts[i], c)
				gcd.SetConnectionStatus(contacts[i], int(c))
				//log.Printf("now: %v", contactMgr[contacts[i]].Status)
			}
		}
		time.Sleep(time.Second * 4)
	}
}

func torStatusPoller() {
	for {
		time.Sleep(time.Second)
		//todo: this should use a config manager
		//todo: also, try dialing the proxy to differentiate tor not running vs control port not configured
		rawStatus, err := asaur.GetInfo("localhost:9051", "tcp4", "", "status/bootstrap-phase")
		if err != nil {
			gcd.TorStatus(0, "can't find tor. is it running? is the controlport configured?")
			continue
		}

		status := asaur.ParseBootstrapPhase(rawStatus)
		progress, _ := strconv.Atoi(status["PROGRESS"])

		if status["TAG"] == "done" {
			gcd.TorStatus(3, "tor appears to be running just fine!")
			continue
		}

		if progress == 0 {
			gcd.TorStatus(1, "tor is trying to start up")
			continue
		}

		gcd.TorStatus(2, status["SUMMARY"])
	}
}

func cwtchListener(groupID string, channel chan model.Message) {
	for {
		m := <-channel
		log.Printf("GROUPMSG %s %s", m.Message, m.PeerID)
		name := m.PeerID
		if name == peer.GetProfile().Onion {
			name = "me"
		} else {
			var exists bool // lol this is a golang antifeature
			name, exists = peer.GetProfile().GetCustomAttribute(m.PeerID + "_name")
			if !exists  {
				name = ""
			}
		}
		if name == "" {
			name = m.PeerID[:16] + "..."
		}
		DeliverMessageToUI(groupID, m.PeerID, name, m.Message, 0, m.PeerID == peer.GetProfile().Onion, m.Timestamp)
		peer.Save()
	}
}

func ricochetListener() {
	err := peer.Listen()
	if err != nil {
		fmt.Printf("error listening for connections: %v\n", err)
		gcd.InvokePopup("error handling network connection")
	}
}

func postmanPat() {
	postOffice := make(map[string]chan Message)

	for {
		m := <-outgoingMessages

		_, found := postOffice[m.With]
		if !found {
			postOffice[m.With] = make(chan Message, 100)
			go andHisBlackAndWhiteCat(postOffice[m.With])
		}

		postOffice[m.With] <- m
	}
}

func andHisBlackAndWhiteCat(incomingMessages chan Message) {
	for {
		m := <-incomingMessages
		connection := peer.PeerWithOnion(m.With)
		connection.DoOnChannel("im.ricochet.chat", channels.Outbound, func(channel *channels.Channel) {
			chatchannel, ok := channel.Handler.(*channels.ChatChannel)
			if ok {
				log.Printf("Sending packet")
				acknowledgementIDs[chatchannel.SendMessage(m.Message)] = m.MessageID
			}
		})
	}
}

func initialize(view *quick.QQuickView) {
	var err error
	//TODO: this section is ported over and has a lot of printf errors, need to show them in the ui
	var dirname, filename string
	if os.Getenv("CWTCH_FOLDER") != "" {
		dirname = os.Getenv("CWTCH_FOLDER")
		filename = path.Join(dirname, "keep-this-file-private")
	} else {
		usr, err := user.Current()
		if err != nil {
			fmt.Printf("\nerror: could not load current user: %v\n", err)
			os.Exit(1)
		}
		dirname = path.Join(usr.HomeDir, ".cwtch")
		filename = path.Join(dirname, "keep-this-file-private")
	}

	/*_, err := app2.NewApp(dirname, "/data/data/org.qtproject.example.go/lib/libtor.so")
	if err != nil {
		log.Printf("ERROR CREATING CWTCH APP: %v", err)
	}
	time.Sleep(time.Second * 10)
	*/
	os.MkdirAll(dirname, 0700)

	_, err = app.NewApp("/data/data/org.qtproject.example.go/files/", "/data/data/org.qtproject.example.go/lib/libtor.so")
	log.Printf("starting Swtch app: err: %v\n", err)

	peer, err = libpeer.LoadCwtchPeer(filename, "be gay do crime")
	if err != nil {
		fmt.Println("couldn't load your config file, attempting to create a new one now")

		names, err := diceware.Generate(1)
		peer, err = libpeer.NewCwtchPeer(names[0], "be gay do crime", filename)
		if err != nil {
			fmt.Println("couldn't create one either :( exiting")
			os.Exit(1)
		}

		peer.Save()
	}

	gcd.UpdateMyProfile(peer.GetProfile().Name, peer.GetProfile().Onion, randomProfileImage(peer.GetProfile().Onion))

	aif := application.ApplicationInstanceFactory{}
	aif.Init()
	app := new(application.RicochetApplication)
	aif.AddHandler("im.ricochet.chat", func(rai *application.ApplicationInstance) func() channels.Handler {
		ccl := new(ChatChannelListener)
		ccl.Init(rai, app)
		return func() channels.Handler {
			chat := new(channels.ChatChannel)
			chat.Handler = ccl
			return chat
		}
	})
	peer.SetApplicationInstanceFactory(aif)

	contacts := peer.GetContacts()
	for i := range contacts {
		attr, _ := peer.GetProfile().GetCustomAttribute(contacts[i] + "_name")
		contactMgr[contacts[i]] = &Contact{[]Message{}, 0, 0}
		gcd.AddContact(attr, contacts[i], "", randomProfileImage(contacts[i]), "0", peer.GetContact(contacts[i]).Trusted)
	}

	groups := peer.GetGroups()
	for i := range groups {
		group := peer.GetGroup(groups[i])
		group.NewMessage = make(chan model.Message)
		go cwtchListener(groups[i], group.NewMessage)
		peer.JoinServer(group.GroupServer)
		//TODO: base the profileImage off the groupid, not the server. probably by decoding it and then re-encoding it b32
		gcd.AddContact(group.GroupID[:12], group.GroupID, group.GroupServer, randomGroupImage(groups[i]), "0", group.Accepted)
		log.Printf("GROUP %s@%s", group.GroupID, group.GroupServer)
	}

}

// temporary until we do real picture selection
func randomProfileImage(onion string) string {
	//TODO: this is a hack, fix ever passing this in
	if onion == "me" {
		onion = peer.GetProfile().Onion
	}

	choices := []string{"001-centaur", "002-kraken", "003-dinosaur", "004-tree-1", "005-hand", "006-echidna", "007-robot", "008-mushroom", "009-harpy", "010-phoenix", "011-dragon-1", "012-devil", "013-troll", "014-alien", "015-minotaur", "016-madre-monte", "017-satyr", "018-karakasakozou", "019-pirate", "020-werewolf", "021-scarecrow", "022-valkyrie", "023-curupira", "024-loch-ness-monster", "025-tree", "026-cerberus", "027-gryphon", "028-mermaid", "029-vampire", "030-goblin", "031-yeti", "032-leprechaun", "033-medusa", "034-chimera", "035-elf", "036-hydra", "037-cyclops", "038-pegasus", "039-narwhal", "040-woodcutter", "041-zombie", "042-dragon", "043-frankenstein", "044-witch", "045-fairy", "046-genie", "047-pinocchio", "048-ghost", "049-wizard", "050-unicorn"}
	barr, err := base32.StdEncoding.DecodeString(strings.ToUpper(onion))
	if err != nil || len(barr) != 35 {
		fmt.Printf("error: %v %v %v\n", onion, err, barr)
		return "qrc:/qml/images/extra/openprivacy.png"
	}
	return "qrc:/qml/images/profiles/" + choices[int(barr[33])%len(choices)] + ".png"
}

func randomGroupImage(onion string) string {
	choices := []string{"001-borobudur","002-opera-house","003-burj-al-arab","004-chrysler","005-acropolis","006-empire-state-building","007-temple","008-indonesia-1","009-new-zealand","010-notre-dame","011-space-needle","012-seoul","013-mosque","014-milan","015-statue","016-pyramid","017-cologne","018-brandenburg-gate","019-berlin-cathedral","020-hungarian-parliament","021-buckingham","022-thailand","023-independence","024-angkor-wat","025-vaticano","026-christ-the-redeemer","027-colosseum","028-golden-gate-bridge","029-sphinx","030-statue-of-liberty","031-cradle-of-humankind","032-istanbul","033-london-eye","034-sagrada-familia","035-tower-bridge","036-burj-khalifa","037-washington","038-big-ben","039-stonehenge","040-white-house","041-ahu-tongariki","042-capitol","043-eiffel-tower","044-church-of-the-savior-on-spilled-blood","045-arc-de-triomphe","046-windmill","047-louvre","048-torii-gate","049-petronas","050-matsumoto-castle","051-fuji","052-temple-of-heaven","053-pagoda","054-chichen-itza","055-forbidden-city","056-merlion","057-great-wall-of-china","058-taj-mahal","059-pisa","060-indonesia"}
	barr, err := hex.DecodeString(onion)
	if err != nil || len(barr) == 0 {
		fmt.Printf("error: %v %v %v\n", onion, err, barr)
		return "qrc:/qml/images/extra/openprivacy.png"
	}
	return "qrc:/qml/images/servers/" + choices[int(barr[0])%len(choices)] + ".png"
}