package mc

import (
	"errors"
	"fmt"
	"log"
	"strings"
	"tg-mc/conf"
	"time"

	"github.com/Tnze/go-mc/bot"
	"github.com/Tnze/go-mc/bot/basic"
	"github.com/Tnze/go-mc/bot/msg"
	"github.com/Tnze/go-mc/bot/playerlist"
	"github.com/Tnze/go-mc/bot/screen"
	"github.com/Tnze/go-mc/chat"
	"github.com/Tnze/go-mc/data/item"
	tgbotapi "github.com/go-telegram-bot-api/telegram-bot-api/v5"
)

func Run() error {
	conf.Client = bot.NewClient()
	conf.Client.Auth.Name = conf.GetBotSettings().MCBotName
	client := conf.Client

	conf.Player = basic.NewPlayer(client, basic.DefaultSettings, basic.EventsListener{
		GameStart:    onGameStart,
		Disconnect:   onDisconnect,
		HealthChange: onHealthChange,
		Death:        onDeath,
	})
	conf.PlayerList = playerlist.New(client)
	conf.ChatHandler = msg.New(client, conf.Player, conf.PlayerList, msg.EventsHandler{
		SystemChat:        onSystemMsg,
		PlayerChatMessage: onPlayerMsg,
		DisguisedChat:     onDisguisedMsg,
	})
	conf.ScreenManager = screen.NewManager(client, screen.EventsListener{
		Open:    nil,
		SetSlot: onScreenSlotChange,
		Close:   nil,
	})

	err := client.JoinServer(
		conf.GetBotSettings().MCServer,
	)

	if err != nil {
		log.Fatal(err)
	}

	log.Println("Login success")

	var perr bot.PacketHandlerError
	for {
		if err = client.HandleGame(); err == nil {
			return errors.New("handle game error")
		}
		if errors.As(err, &perr) {
			return err
		} else {
			return err
		}
	}
}

func SendMsg(msg string) error {
	if err := conf.ChatHandler.SendMessage(msg); err != nil {
		return err
	}
	return nil
}

func onSystemMsg(msg chat.Message, overlay bool) error {
	log.Printf("System: %v", msg)
	m := tgbotapi.NewMessage(conf.GetBotSettings().GroupID, fmt.Sprintf("%v", msg))
	conf.Bot.Send(m)
	return nil
}

func onPlayerMsg(msg chat.Message, validated bool) error {
	log.Printf("Player: %s", msg)
	s := strings.Split(msg.String(), " ")
	if len(s) > 1 {
		if s[0] != fmt.Sprintf("<%v>", conf.GetBotSettings().MCBotName) {
			m := tgbotapi.NewMessage(conf.GetBotSettings().GroupID, fmt.Sprintf("%v", msg))
			conf.Bot.Send(m)
		}
	}
	return nil
}

func onDisguisedMsg(msg chat.Message) error {
	log.Printf("Disguised: %v", msg)
	m := tgbotapi.NewMessage(conf.GetBotSettings().GroupID, fmt.Sprintf("%v", msg))
	conf.Bot.Send(m)
	return nil
}

func onDeath() error {
	log.Println("Died and Respawned")
	// If we exclude Respawn(...) then the player won't press the "Respawn" button upon death
	go func() {
		time.Sleep(time.Second * 5)
		err := conf.Player.Respawn()
		if err != nil {
			log.Print(err)
		}
	}()
	return nil
}

func onGameStart() error {
	log.Println("Game start")
	if err := conf.ChatHandler.SendMessage("Hello, world"); err != nil {
		return err
	}
	return nil // if err isn't nil, HandleGame() will return it.
}

func onScreenSlotChange(id, index int) error {
	if id == -2 {
		log.Printf("Slot: inventory: %v", conf.ScreenManager.Inventory.Slots[index])
	} else if id == -1 && index == -1 {
		log.Printf("Slot: cursor: %v", conf.ScreenManager.Cursor)
	} else {
		container, ok := conf.ScreenManager.Screens[id]
		if ok {
			// Currently, only inventory container is supported
			switch container.(type) {
			case *screen.Inventory:
				slot := container.(*screen.Inventory).Slots[index]
				itemInfo := item.ByID[item.ID(slot.ID)]
				log.Printf("Slot: Screen[%d].Slot[%d]: [%v] * %d | NBT: %v", id, index, itemInfo, slot.Count, slot.NBT)
			}
		}
	}
	return nil
}

func onHealthChange(health float32, foodLevel int32, foodSaturation float32) error {
	log.Printf("Health: %.2f, FoodLevel: %d, FoodSaturation: %.2f", health, foodLevel, foodSaturation)
	return nil
}

type DisconnectErr struct {
	Reason chat.Message
}

func (d DisconnectErr) Error() string {
	return "disconnect: " + d.Reason.String()
}

func onDisconnect(reason chat.Message) error {
	// return an error value so that we can stop main loop
	return DisconnectErr{Reason: reason}
}