using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using InfallibleCode;
using UICode;

public class RaycastManager : MonoBehaviour
{
    /*[SerializeField] */private Camera _camera; //A reference to the camera of the ray.
    public GameObject _currentHitObject; //The object that the ray is currently hitting.

    [HideInInspector] public RaycastHit hit;

    LayerMask mask = -1;
    private static RaycastManager _instance;
    public static RaycastManager GetInstance() { return _instance; }

    public bool IsLookingAtInteractable;
    public bool IsLookingAtGrabbable;

    public bool RaycastIsActive = true;

    void Awake()
    {
        if (!_instance)
        {
            _instance = this;
        }
    }

    private void Start()
    {
        _camera = PlayerManager.GetInstance().PlayerMainCamera.GetComponent<Camera>();
    }

    public void RaycastIsActivated() 
    {
        RaycastIsActive = true;
    }

    public void RaycastIsDisabled() 
    {
        RaycastIsActive = false;
    }

    void Update()
    {
        #region UI Raycast
        //var interactableForUI = _currentHitObjects.GetComponent<IInteractable>();
        //if (interactableForUI == null)
        //{
        //    UIManager.GetInstance().raycastDefault.SetActive(true);
        //    UIManager.GetInstance().raycastInteractabe.SetActive(false);
        //    return;
        //}
        //else
        //{
        //    UIManager.GetInstance().raycastDefault.SetActive(false);
        //    UIManager.GetInstance().raycastInteractabe.SetActive(true);
        //}

        if (RaycastIsActive)
        {
            if (_currentHitObject == null)
            {
                UIManager.GetInstance().raycastDefault.SetActive(true);
                UIManager.GetInstance().raycastInteractabe.SetActive(false);
                UIManager.GetInstance().raycastLocked.SetActive(false);
            }
            #endregion

            //RaycastHit hit; //The object that the raycast will hit.
            Ray ray = _camera.ScreenPointToRay(Input.mousePosition); //The ray that comes from the camera.
            float raydistance = 2.5f; // The distance of the ray.

            if (Physics.Raycast(ray, out hit, raydistance, mask.value, QueryTriggerInteraction.Ignore))
            {
                _currentHitObject = hit.transform.gameObject;
                Debug.DrawLine(ray.origin, hit.point, Color.red);

                #region Press E Input
                if (_currentHitObject == null) return;
                if (Input.GetKeyDown(KeyCode.E) || Input.GetKeyDown(KeyCode.JoystickButton0)/*A button*/)
                {
                    if (GameplayController.GetInstance().IsOnState(GameplayController.State.Gameplay))
                    {
                        var interactable = _currentHitObject.GetComponents<IInteractable>();
                        if (interactable == null) return;
                        foreach (var _interactable in interactable)
                        {
                            _interactable.Interact();
                        }
                        //interactable.Interact();
                    }
                }
                #endregion

                #region Draggable Input
                if (Input.GetMouseButton(0)) //While you are holding down the left mouse:
                {
                    var draggable = _currentHitObject.GetComponent<IDraggable>();
                    if (draggable == null) return;
                    #region Player Camera
                    //CameraMovement.GetInstance()._cameraSensitivity = 0.5f;
                    #endregion
                    draggable.Drag();
                }
                else if (DraggablesManager.GetInstance().IsDragging)
                {
                    //draggable.Drag

                    //CameraMovement.GetInstance()._cameraSensitivity = CameraMovement.GetInstance()._mouseSensitivityDefault; //Restores mouse sensitivity back to the deafult value.
                    DraggablesManager.GetInstance().IsDragging = false;
                    print("Default mouse sens");
                }

                #region Discoverable
                //if (ExaminableItemData.GetInstance().IsExamining)
                //{
                //print("Mphka sthn if mwrh");
                var discoverable = _currentHitObject.GetComponents<IDiscoverable>();
                if (discoverable == null) return;

                foreach (var _discoverable in discoverable)
                {
                    _discoverable.Discover();
                    print("Discoverable item");
                }

                //}
                #endregion

                //// Initialize variables to null
                //DraggableWindow window = null;
                //DoorBehaviour door = null;

                #region UI Raycast
                var interactableForUI = _currentHitObject.GetComponent<IInteractable>();
                var interactableForUI_Doors = _currentHitObject.GetComponent<DoorBehaviour>();
                var interactableForUI_Windows = _currentHitObject.GetComponent<DraggableWindow>();
                var interactableForUI_Drawers = _currentHitObject.GetComponent<Drawer>();
                //var grabbableForUI = _currentHitObjects.GetComponent<IDraggable>();
                if (interactableForUI == null)
                {
                    UIManager.GetInstance().raycastDefault.SetActive(true);
                    UIManager.GetInstance().raycastInteractabe.SetActive(false);
                    UIManager.GetInstance().raycastLocked.SetActive(false);
                    interactableForUI_Doors = null;
                    return;
                }
                else
                {
                    // Check if it's a DoorBehaviour
                    if (interactableForUI_Doors != null)
                    {
                        if (interactableForUI_Doors.CanOpenDoor)
                        {
                            UIManager.GetInstance().raycastDefault.SetActive(false);
                            UIManager.GetInstance().raycastInteractabe.SetActive(true);
                            UIManager.GetInstance().raycastLocked.SetActive(false);
                        }
                        else // Door is locked
                        {
                            UIManager.GetInstance().raycastDefault.SetActive(false);
                            UIManager.GetInstance().raycastInteractabe.SetActive(false);
                            UIManager.GetInstance().raycastLocked.SetActive(true);
                        }
                    }
                    else if (interactableForUI_Windows)
                    {
                        if (interactableForUI_Windows.CanOpenWindow)
                        {
                            UIManager.GetInstance().raycastDefault.SetActive(false);
                            UIManager.GetInstance().raycastInteractabe.SetActive(true);
                            UIManager.GetInstance().raycastLocked.SetActive(false);
                        }
                        else // window is locked
                        {
                            UIManager.GetInstance().raycastDefault.SetActive(false);
                            UIManager.GetInstance().raycastInteractabe.SetActive(false);
                            UIManager.GetInstance().raycastLocked.SetActive(true);
                        }
                    }
                    else if (interactableForUI_Drawers)
                    {
                        if (interactableForUI_Drawers.CanOpenDrawer)
                        {
                            UIManager.GetInstance().raycastDefault.SetActive(false);
                            UIManager.GetInstance().raycastInteractabe.SetActive(true);
                            UIManager.GetInstance().raycastLocked.SetActive(false);
                        }
                        else // drawer is locked
                        {
                            UIManager.GetInstance().raycastDefault.SetActive(false);
                            UIManager.GetInstance().raycastInteractabe.SetActive(false);
                            UIManager.GetInstance().raycastLocked.SetActive(true);
                        }
                    }
                    // It's neither DraggableWindow nor DoorBehaviour
                    else
                    {
                        UIManager.GetInstance().raycastDefault.SetActive(false);
                        UIManager.GetInstance().raycastInteractabe.SetActive(true);
                        UIManager.GetInstance().raycastLocked.SetActive(false);
                    }
                }

                //if (grabbableForUI == null && IsLookingAtInteractable == false)
                //{
                //    //IsLookingAtInteractable = false;
                //    IsLookingAtGrabbable = false;
                //    UIManager.GetInstance().raycastDefault.SetActive(true);
                //    UIManager.GetInstance().raycastInteractabe.SetActive(false);
                //    return;
                //}
                //else
                //{
                //    IsLookingAtGrabbable = true;
                //    if (IsLookingAtInteractable == false)
                //    {
                //        UIManager.GetInstance().raycastDefault.SetActive(false);
                //        UIManager.GetInstance().raycastInteractabe.SetActive(true);
                //    }
                //}

                #region Polished WIP Implementation
                //var interactableForUI = _currentHitObjects.GetComponent<IInteractable>();
                //var grabbableForUI = _currentHitObjects.GetComponent<IDraggable>();
                //if (interactableForUI == null && IsLookingAtGrabbable == false)
                //{
                //    IsLookingAtInteractable = false;
                //    //IsLookingAtGrabbable = false;
                //    UIManager.GetInstance().raycastDefault.SetActive(true);
                //    UIManager.GetInstance().raycastInteractabe.SetActive(false);
                //    return;
                //}
                //else
                //{
                //    IsLookingAtInteractable = true;
                //    if (IsLookingAtGrabbable == false)
                //    {
                //        UIManager.GetInstance().raycastDefault.SetActive(false);
                //        UIManager.GetInstance().raycastInteractabe.SetActive(true);
                //    }
                //}

                //if(grabbableForUI == null && IsLookingAtInteractable == false) 
                //{
                //    //IsLookingAtInteractable = false;
                //    IsLookingAtGrabbable = false;
                //    UIManager.GetInstance().raycastDefault.SetActive(true);
                //    UIManager.GetInstance().raycastInteractabe.SetActive(false);
                //    return;
                //}
                //else
                //{
                //    IsLookingAtGrabbable = true;
                //    if (IsLookingAtInteractable == false)
                //    {
                //        UIManager.GetInstance().raycastDefault.SetActive(false);
                //        UIManager.GetInstance().raycastInteractabe.SetActive(true);
                //    }
                //}
                #endregion
                #endregion


                #region WorldUI Icon
                switch (hit.collider.tag)
                {
                    case "Interactable":
                        //_currentHitObjects = hit.transform.gameObject;
                        if (!UIManager.GetInstance().updateUI)
                        {
                            UIManager.GetInstance().updateUI = true;
                            var worldUI = _currentHitObject.GetComponent<IUIWorld>();
                            if (worldUI == null) return;
                            worldUI.UpdateWorldUI();
                            print("UI icon is updating");
                        }
                        //if (DraggablesManager.GetInstance().IsDragging)
                        //{
                        //    UIManager.GetInstance().updateUI = true;
                        //    var worldUI = _currentHitObjects.GetComponent<IUIWorld>();
                        //    if (worldUI == null) return;
                        //    worldUI.UpdateWorldUI();
                        //    print("UI icon is updating");
                        //}
                        break;

                    default:
                        if (UIManager.GetInstance().updateUI)
                        {
                            UIManager.GetInstance().DisableWorldUIIcon();
                            print("UI icon is Disabled");
                            UIManager.GetInstance().updateUI = false;
                        }
                        break;
                }

                #endregion

                #endregion



                #region old code
                //switch (hit.collider.tag)
                //{
                //    case "Closet":

                //        _currentHitObjects = hit.transform.gameObject;
                //        print("Ray hit the closet");
                //        if (ClosetHideBehaviour.GetInstance().InCloset == false && ClosetHideBehaviour.GetInstance().OutOfCloset)
                //        {
                //            ClosetHideBehaviour.GetInstance().HideInCloset();
                //        }                   
                //        break;

                //    case "LightSwitch":

                //        _currentHitObjects = hit.transform.gameObject;
                //        _currentHitObjects.GetComponent<NewLightSwitch>().lightSwitch();
                //        print("Ray hit the lightSwitch");
                //        //LightSwitch.GetInstance().lightSwitch();
                //        LightsManager.GetInstance().CanInteractWithLight = true;
                //        break;

                //    case "Battery":

                //        _currentHitObjects = hit.transform.gameObject;
                //        print("Ray hit a battery");
                //        BatteryManager.GetInstance().collectBattery();
                //        if (BatteryManager.GetInstance().BatteryCollected) 
                //        {
                //            AudioManager.GetInstance().PickUpItemSoundPlay();
                //            Destroy(hit.transform.gameObject);
                //            BatteryManager.GetInstance().BatteryCollected = false;
                //        }

                //        break;

                //    case "Pills":

                //        _currentHitObjects = hit.transform.gameObject;
                //        print("Ray hit a pill");
                //        PlayerHealthManager.GetInstance().collectMedicine();
                //        if (PlayerHealthManager.GetInstance().PillsCollected) //If you have just collected a medicine:
                //        {
                //            AudioManager.GetInstance().PickUpItemSoundPlay();
                //            Destroy(hit.transform.gameObject);
                //            PlayerHealthManager.GetInstance().PillsCollected = false; //Defaults the MedicineCollected bool for the next medicine to be picked up.
                //        }

                //        break;

                //    case "Door":

                //        _currentHitObjects = hit.transform.gameObject;
                //        print("Ray hit a door");
                //        DoorBehaviour.GetInstance().OpenDoor();

                //        break;

                //    case "ExaminableItem":

                //        _currentHitObjects = hit.transform.gameObject;
                //        print("Ray hit an ExaminableItem");
                //        ExaminableItemData.GetInstance().CanInteractWithInteractableItem = true;
                //        break;

                //    default:
                //        LightsManager.GetInstance().CanInteractWithLight = false;
                //        ExaminableItemData.GetInstance().CanInteractWithInteractableItem = false;
                //        break;
                //}
                #endregion

            }
            else
            {
                _currentHitObject = null;
            }
        }
    }

    public void CheckForInteractableObject() 
    {
        var interactable = _currentHitObject.GetComponents<IInteractable>();
        if (interactable == null) return;
        foreach (var _interactable in interactable)
        {
            _interactable.Interact();
        }
    }
}