using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.SceneManagement;

public class RoomInfo
{
	public string name;
	public int X;
	public int Y;
}

public class RoomController : MonoBehaviour
{
	public static RoomController instance;
	string currentWorldName = "Basement";
	RoomInfo currentLoadRoomData;
	Room currRoom;
	Queue<RoomInfo> loadRoomQueue = new Queue<RoomInfo>();
	public List<Room> loadedRooms = new List<Room>();
	bool isLoadingRoom = false;

	void Awake()
	{
		instance = this;
	}

	void Start()
	{
		//LoadRoom("Start", 0, 0);
		//LoadRoom("Empty", 1, 0);
		//LoadRoom("Empty", -1, 0);
		//LoadRoom("Empty", 0, 1);
		//LoadRoom("Empty", 0, -1);
	}

	void Update()
	{
		UpdateRoomQueue();
	}

	void UpdateRoomQueue()
	{
		if(isLoadingRoom)
		{
			return;
		}

		if(loadRoomQueue.Count == 0)
		{
			return;
		}

		currentLoadRoomData = loadRoomQueue.Dequeue();
		isLoadingRoom = true;

		StartCoroutine(LoadRoomRoutine(currentLoadRoomData));
	}

	public void LoadRoom(string name, int x, int y)
	{
		if(DoesRoomExist(x, y))
		{
			return;
		}

		RoomInfo newRoomData = new RoomInfo();
		newRoomData.name = name;
		newRoomData.X = x;
		newRoomData.Y = y;

		loadRoomQueue.Enqueue(newRoomData);
	}

	IEnumerator LoadRoomRoutine(RoomInfo info)
	{
		string roomName = currentWorldName + info.name;

		AsyncOperation loadRoom = SceneManager.LoadSceneAsync(roomName, LoadSceneMode.Additive);

		while(loadRoom.isDone == false)
		{
			yield return null;
		}
	}

	public void RegisterRoom( Room room)
	{
		if(!DoesRoomExist(currentLoadRoomData.X, currentLoadRoomData.Y))
		{
		room.transform.position = new Vector3(
			currentLoadRoomData.X * room.Width,
			currentLoadRoomData.Y * room.Height,
			0
		);

		room.X = currentLoadRoomData.X;
		room.Y = currentLoadRoomData.Y;
		room.name = currentWorldName + "-" + currentLoadRoomData.name + " " + room.X + ", " + room.Y;
		room.transform.parent = transform;

		isLoadingRoom = false;

		if(loadedRooms.Count == 0)
		{
			CameraController.instance.currRoom = room;
		}

		loadedRooms.Add(room);
		room.RemoveUnconnectedDoors();
		}
		else
		{
			Destroy(room.gameObject);
			isLoadingRoom = false;
		}
	}

	public bool DoesRoomExist( int x, int y)
	{
		return loadedRooms.Find( item => item.X == x && item.Y == y) != null;
	}

	public Room FindRoom( int x, int y)
	{
		return loadedRooms.Find( item => item.X == x && item.Y == y);
	}

	public void OnPlayerEnterRoom(Room room)
	{
		CameraController.instance.currRoom = room;
		currRoom = room;
	}
}