using UnityEngine;
using UnityEngine.EventSystems;

public class FurnitureBuilder : MonoBehaviour
{
    public enum EditTool { Move, Rotate }

    [Header("Настройки")]
    public GameObject currentPrefab; 
    public LayerMask floorLayer;
    [SerializeField] private GameObject shopPanel;

    [Header("Режим редактирования (UI)")]
    [SerializeField] private GameObject editPanel; 
    public float rotationSpeed = 5f;

    // Внутренние переменные состояния
    private GameObject _activeFurniture;
    private FurnitureObject _activeFurnitureScript; // <--- ИЗМЕНИЛИ ИМЯ ЗДЕСЬ
    private EditTool _currentTool = EditTool.Move;
    private Camera _cam;

    private void Start()
    {
        _cam = Camera.main;
        currentPrefab = null;
        editPanel.SetActive(false); 
    }

    void Update()
    {
        if (_activeFurniture != null)
        {
            HandleEditing();
        }
        else if (currentPrefab != null)
        {
            if (Input.GetMouseButtonDown(0) && !shopPanel.activeSelf && !IsPointerOverUI())
            {
                TryPlaceFurniture();
            }
        }
    }

    private void HandleEditing()
    {
        Vector3 screenPos = _cam.WorldToScreenPoint(_activeFurniture.transform.position);
        editPanel.transform.position = screenPos + new Vector3(0, 100, 0); 

        if (Input.GetMouseButton(0) && !IsPointerOverUI())
        {
            if (_currentTool == EditTool.Move)
            {
                Ray ray = _cam.ScreenPointToRay(Input.mousePosition);
                if (Physics.Raycast(ray, out RaycastHit hit, 100f, floorLayer))
                {
                    _activeFurniture.transform.position = hit.point;
                }
            }
            else if (_currentTool == EditTool.Rotate)
            {
                float rotX = Input.GetAxis("Mouse X");
                _activeFurniture.transform.Rotate(Vector3.up, -rotX * rotationSpeed);
            }
        }
    }

    void TryPlaceFurniture()
    {
        Ray ray = _cam.ScreenPointToRay(Input.mousePosition);
        if (Physics.Raycast(ray, out RaycastHit hit, 100f, floorLayer))
        {
            _activeFurniture = Instantiate(currentPrefab, hit.point, Quaternion.identity);
            
            // <--- ИЗМЕНИЛИ ИМЯ ЗДЕСЬ
            _activeFurnitureScript = _activeFurniture.GetComponent<FurnitureObject>(); 
            
            _activeFurnitureScript.SetEditMode(true);
            editPanel.SetActive(true);
            _currentTool = EditTool.Move; 
            currentPrefab = null; 
        }
    }

    public void SelectMoveTool() { _currentTool = EditTool.Move; }
    public void SelectRotateTool() { _currentTool = EditTool.Rotate; }

    public void ConfirmPlacement()
    {
        if (_activeFurnitureScript != null && _activeFurnitureScript.IsPlacementValid)
        {
            _activeFurnitureScript.SetEditMode(false); 
            _activeFurniture = null;                   
            _activeFurnitureScript = null;
            editPanel.SetActive(false);                
        }
        else
        {
            Debug.Log("Нельзя поставить сюда! Мебель пересекается с препятствием.");
        }
    }

    public void SelectFurnitureAndCloseShop(GameObject prefabToSelect)
    {
        currentPrefab = prefabToSelect;
        shopPanel.SetActive(false);    
    }

    private bool IsPointerOverUI()
    {
        if (EventSystem.current != null)
        {
            if (EventSystem.current.IsPointerOverGameObject()) return true;
            if (Input.touchCount > 0 && EventSystem.current.IsPointerOverGameObject(Input.GetTouch(0).fingerId)) return true;
        }
        return false;
    }
}