using Assets.Scripts.Furniture;
using System;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.XR.ARFoundation;
using UnityEngine.XR.ARSubsystems;

public class FurnitureManager : MonoBehaviour
{
    [SerializeField] private ARRaycastManager arRaycastManager; // Para detectar superficies
    [SerializeField] private List<GameObject> furniturePrefabs; // Lista de prefabs de muebles
    [SerializeField] private GameObject furniturePreviewPrefab; // Prefab para previsualización

    private GameObject _currentPreview;
    private GameObject _currentFurniturePrefab;
    private Vector3 _detectedPosition = Vector3.zero;
    private Quaternion _detectedRotation = Quaternion.identity;
    private bool _canAddFurniture = false;

    private void Start()
    {
        // Establece el primer mueble como predeterminado
        if (furniturePrefabs.Count > 0)
        {
            SetSelectedFurniture(furniturePrefabs[0]);
        }
    }

    private void Update()
    {
        DetectPlaneAndUpdatePreview();
    }

    /// <summary>
    /// Método para detectar planos y actualizar la posición de previsualización.
    /// </summary>
    private void DetectPlaneAndUpdatePreview()
    {
        if (_currentPreview == null) return;

        var hits = new List<ARRaycastHit>();
        var middleScreen = new Vector2(Screen.width / 2, Screen.height / 2);

        if (arRaycastManager.Raycast(middleScreen, hits, TrackableType.PlaneWithinPolygon))
        {
            _detectedPosition = hits[0].pose.position;
            _detectedRotation = hits[0].pose.rotation;

            _currentPreview.transform.SetPositionAndRotation(_detectedPosition, _detectedRotation);
            _currentPreview.SetActive(true);

            _canAddFurniture = true;
        }
        else
        {
            _currentPreview.SetActive(false);
            _canAddFurniture = false;
        }
    }

    /// <summary>
    /// Método para colocar un mueble en la posición detectada.
    /// </summary>
    public void PlaceFurniture()
    {
        if (!_canAddFurniture || _currentFurniturePrefab == null) return;

        var newFurniture = Instantiate(_currentFurniturePrefab);
        newFurniture.transform.SetPositionAndRotation(_detectedPosition, _detectedRotation);

        // Añadir funcionalidad de manipulación (rotar, mover, etc.)
        newFurniture.AddComponent<FurnitureDragger>();

        Debug.Log("Mueble colocado en la posición detectada.");
    }

    /// <summary>
    /// Cambiar el prefab del mueble seleccionado.
    /// </summary>
    /// <param name="furniturePrefab">Prefab del mueble seleccionado.</param>
    public void SetSelectedFurniture(GameObject furniturePrefab)
    {
        _currentFurniturePrefab = furniturePrefab;

        // Actualizar el preview
        if (_currentPreview != null)
        {
            Destroy(_currentPreview);
        }

        _currentPreview = Instantiate(furniturePreviewPrefab ?? furniturePrefab);
        _currentPreview.SetActive(false);
    }
}