package main

import (
	"fmt"
	"log"
	"os"
	"os/signal"
	"strings"
	"syscall"
	"time"

	"github.com/fsnotify/fsnotify"
	"github.com/spf13/viper"
	"maunium.net/go/mautrix"
	"maunium.net/go/mautrix/event"
)

var Homeserver string
var Username string
var Password string
var DimensionServer string
var HomeserverDomain string
var GitCommit string
var Statefile string

func main() {
	viper.SetConfigName("config")
	viper.AddConfigPath(".")
	viper.AddConfigPath("/etc/simpbot")
	err := viper.ReadInConfig()
	if err != nil {
		log.Fatalf("Fatal error config file: %v \n", err)
	}
	viper.SetConfigType("yaml")
	Homeserver = viper.GetString("homeserver")
	viper.SetDefault("domain", Homeserver)
	viper.SetDefault("statefile", "simpstate")
	Username = viper.GetString("username")
	Password = viper.GetString("password")
	DimensionServer = viper.GetString("dimension")
	HomeserverDomain = viper.GetString("domain")
	Statefile = viper.GetString("statefile")
	var vtubers []*Vtuber
	log.Println("Logging into", Homeserver, "as", Username)
	client, err := mautrix.NewClient(Homeserver, "", "")
	if err != nil {
		panic(err)
	}
	client.Store = NewLazyMemStore(Statefile)
	_, err = client.Login(&mautrix.ReqLogin{
		Type:             "m.login.password",
		Identifier:       mautrix.UserIdentifier{Type: mautrix.IdentifierTypeUser, User: Username},
		Password:         Password,
		StoreCredentials: true,
	})
	if err != nil {
		panic(err)
	}
	fmt.Println("Login successful")
	syncer := client.Syncer.(*mautrix.DefaultSyncer)
	syncer.OnEventType(event.EventMessage, func(source mautrix.EventSource, evt *event.Event) {
		fmt.Printf("<%[1]s> %[4]s (%[2]s/%[3]s)\n", evt.Sender, evt.Type.String(), evt.ID, evt.Content.AsMessage().Body)
		body := evt.Content.AsMessage().Body
		body_s := strings.Split(body, " ")
		if body_s[0] != "!simp" {
			return
		}
		if len(body_s) < 2 {
			return //nothing to parse
		}
		if evt.Sender == client.UserID {
			return //ignore events from self
		}
		switch body_s[1] {
		case "info":
			// print info page
			var infomsg string
			vlist := []string{}
			for _, vt := range vtubers {
				ann := ""
				if vt.AnnounceLive {
					ann = "*"
				}
				vlist = append(vlist, fmt.Sprintf("%v%v", vt.Name, ann))
			}
			infomsg = fmt.Sprintf("Currently Simping For: \n%v", strings.Join(vlist, "\n"))
			client.SendText(evt.RoomID, infomsg)
		case "version":
			// print version
			client.SendText(evt.RoomID, "SimpBot version "+GitCommit)
		case "reload":
			//reload config
			client.SendText(evt.RoomID, "unimplemented")
		case "help":
			client.SendText(evt.RoomID, "Supported commands: info,version")
		default:
			//command not found
			client.SendText(evt.RoomID, "command not recognized")
		}
	})
	syncer.OnEventType(event.StateMember, func(source mautrix.EventSource, evt *event.Event) {
		fmt.Printf("<%[1]s> %[4]s (%[2]s/%[3]s)\n", evt.Sender, evt.Type.String(), evt.ID, evt.Content.AsMessage().Body)
		if evt.Content.AsMember().Membership.IsInviteOrJoin() {
			_, err = client.JoinRoomByID(evt.RoomID)
			if err != nil {
				fmt.Printf("error joining room %v", evt.RoomID)
			} else {
				fmt.Println("joined room")
			}
		}
	})
	sigs := make(chan os.Signal, 1)
	signal.Notify(sigs, syscall.SIGUSR1)
	vtubers = LoadVtubers()
	viper.WatchConfig()
	viper.OnConfigChange(func(e fsnotify.Event) {
		fmt.Println("Config file changed,reloading vtubers:", e.Name)
		vtubers = LoadVtubers()
	})

	go func() {
		for {
			time.Sleep(30 * time.Second)
			roomResp, err := client.JoinedRooms()
			if err != nil {
				log.Println("error gettting joined rooms")
				log.Println(err)
				log.Println("Skipping iteration")
				continue
			}
			rooms := roomResp.JoinedRooms
			// We're going to assume they're only stream one video at a time
			for _, v := range vtubers {
				v.Update()
				if v.IsLive() {
					for _, room := range rooms {
						//check to see if already embeded
						var content YoutubeWidget
						err = client.StateEvent(room, event.NewEventType("im.vector.modular.widgets"), "dimension-m.video-simp-"+v.Name, &content)
						if content.ID == "" {
							if v.AnnounceLive {
								client.SendText(room, v.LiveMsg)
							} else {
								client.SendNotice(room, v.LiveMsg)
							}
							client.SendNotice(room, fmt.Sprintf("%v's Title: %v", v.Name, v.CurrentStreamTitle))
							resp, err := client.SendStateEvent(room, event.NewEventType("im.vector.modular.widgets"), "dimension-m.video-simp-"+v.Name, NewYT(v.Name+"'s stream", v.CurrentStream, string(room)))
							if err != nil {
								log.Println("error embeding video")
								log.Println(err)
							}
							log.Printf("Embed event %v", resp)
						}
					}
				} else {
					//Not live, check to see if there's any embeds and remove them
					for _, room := range rooms {
						var content YoutubeWidget
						err = client.StateEvent(room, event.NewEventType("im.vector.modular.widgets"), "dimension-m.video-simp-"+v.Name, &content)
						if err == nil && content.ID != "" {
							//event found, kill it
							resp, err := client.SendStateEvent(room, event.NewEventType("im.vector.modular.widgets"), "dimension-m.video-simp-"+v.Name, struct{}{})
							if err != nil {
								log.Println("error removed video embed")
								log.Println(err)
							}
							log.Printf("Emebed remove %v", resp)
						}
					}
				}
			}
		}
	}()

	err = client.Sync()
	if err != nil {
		panic(err)
	}
}