using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.XR.ARFoundation;
using UnityEngine.XR.ARSubsystems;

public class ObjectSelector : MonoBehaviour
{
    public LayerMask interactableLayer;

    private ARRaycastManager arRaycastManager; // Asignable din�micamente
    private Camera arCamera; // Asignable din�micamente
    private GameObject selectedObject;

    private readonly float longTapTreshold = 1f;
    private readonly float doubleTapMaxDelay = 0.5f;
    private float tapTimer = 0f;
    private float lastTapTime = 0f;
    private bool isRelocating = false;
    

    // M�todo para asignar la c�mara desde MeasuringSystem
    public void SetCamera(Camera camera)
    {
        arCamera = camera;
        Debug.Log($"C�mara asignada: {arCamera.name}");
    }

    // M�todo para asignar el ARRaycastManager desde MeasuringSystem
    public void SetARRaycastManager(ARRaycastManager raycastManager)
    {
        arRaycastManager = raycastManager;
        Debug.Log($"ARRaycastManager asignado: {arRaycastManager.name}");
        FindObjectOfType<DebugLoggerUI>().AddMessage($"ARRaycastManager asignado: {arRaycastManager.name}");
    }

    private void Update()
    {
        if (arCamera == null || arRaycastManager == null)
        {
            Debug.LogWarning("La c�mara o el ARRaycastManager no han sido asignados.");
            FindObjectOfType<DebugLoggerUI>().AddMessage("La c�mara o el ARRaycastManager no han sido asignados.");
            return;
        }

        HandleTouchInput();
        HandleRotation();
        UpdateOutline();
    }

    private void HandleTouchInput()
    {
        if (Input.touchCount == 1)
        {
            Touch touch = Input.GetTouch(0);

            if (touch.phase == TouchPhase.Began)
            {
                Ray ray = arCamera.ScreenPointToRay(touch.position);
                if (Physics.Raycast(ray, out RaycastHit hit, Mathf.Infinity, interactableLayer))
                {
                    if (selectedObject == hit.collider.gameObject)
                    {
                        if (Time.time - lastTapTime <= doubleTapMaxDelay)
                        {
                            DeleteObject();
                            lastTapTime = 0f;
                        }
                        else
                        {
                            lastTapTime = Time.time;
                            StartCoroutine(CheckLongTap());
                        }
                    }
                    else
                    {
                        SelectObject(hit.collider.gameObject);
                    }
                }
                else
                {
                    DeselectObject();
                }
            }

            if (touch.phase == TouchPhase.Moved && isRelocating)
            {
                RelocateObject(touch.position);
            }

            if (touch.phase == TouchPhase.Ended)
            {
                isRelocating = false;
            }
        }
    }

    private IEnumerator CheckLongTap()
    {
        tapTimer = 0f;
        while (tapTimer < longTapTreshold)
        {
            if (Input.touchCount == 0 || Input.GetTouch(0).phase == TouchPhase.Ended)
            {
                yield break;
            }

            tapTimer += Time.deltaTime;
            yield return null;
        }

        isRelocating = true;
    }

    private void RelocateObject(Vector2 screenPosition)
    {
        if (selectedObject != null)
        {
            List<ARRaycastHit> hits = new();
            if (arRaycastManager.Raycast(screenPosition, hits, TrackableType.Planes))
            {
                Pose hitPose = hits[0].pose;

                selectedObject.transform.SetPositionAndRotation(Vector3.Lerp(
                    selectedObject.transform.position,
                    hitPose.position,
                    Time.deltaTime * 10f
                ), Quaternion.Lerp(
                    selectedObject.transform.rotation,
                    selectedObject.transform.rotation,
                    Time.deltaTime * 10f
                ));
            }
        }
    }

    private void HandleRotation()
    {
        if (selectedObject != null && Input.touchCount == 1)
        {
            Touch touch = Input.GetTouch(0);

            if (touch.phase == TouchPhase.Moved)
            {
                Vector2 touchDelta = touch.deltaPosition;
                float rotationAmount = touchDelta.x * 0.1f;

                selectedObject.transform.Rotate(0, -rotationAmount, 0, Space.World);
            }
        }
    }

    private void SelectObject(GameObject gameObject)
    {
        if (selectedObject != null)
        {
            DeselectObject();
        }

        selectedObject = gameObject;

        if (selectedObject != null)
        {
            EnableOutline(selectedObject);
        }
    }

    private void DeselectObject()
    {
        if (selectedObject != null)
        {
            DisableOutline(selectedObject);
        }

        selectedObject = null;
    }

    private void DeleteObject()
    {
        if (selectedObject != null)
        {
            Destroy(selectedObject);
            selectedObject = null;
        }
    }

    private void EnableOutline(GameObject obj)
    {
        if (obj.TryGetComponent<Outline>(out var outline))
        {
            outline.enabled = true;
        }
        else
        {
            var newOutline = obj.AddComponent<Outline>();
            newOutline.OutlineColor = Color.cyan;
            newOutline.OutlineWidth = 10f;
        }
    }

    private void DisableOutline(GameObject obj)
    {
        if (obj.TryGetComponent<Outline>(out var outline))
        {
            outline.enabled = false;
        }
    }

    private void UpdateOutline()
    {
        if (selectedObject != null)
        {
            EnableOutline(selectedObject);
        }
    }
}