using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;

public class DetectInteractable : UnityEngine.MonoBehaviour
{
    public Camera cam;
    public float distanceToSee;
    public string objectHit;
    public bool interactableObject = false;
    public Transform parentToSearch;
    public Scaling scaling;
    public int spinX = 0;
    public int spinY = 0;
    public int spinZ = 0;
    public GameObject navi;
    public GameObject itemsDescriptionCanvas;
    public Text itemsDescriptionText;

    private RaycastHit whatObjectHit;
    private Transform[] childrenToSearhc;

    private void Start()
    {
        childrenToSearhc = parentToSearch.GetComponentsInChildren<Transform>();
    }

    private void Update()
    {
        if (cam.enabled == true)
        {
            if (Input.GetMouseButtonDown(0) && !scaling.scaleUp)
            {
                if (whatObjectHit.collider != null)
                    ExecuteActions(whatObjectHit.collider.gameObject);
            }

            // Bit shift the index of the layer (8) to get a bit mask
            int layerMask = 1 << 8;

            // This would cast rays only against colliders in layer 8.
            // But instead we want to collide against everything except layer 8. The ~ operator does this, it inverts a bitmask.
            layerMask = ~layerMask;

            Debug.DrawRay(cam.transform.position, cam.transform.forward * distanceToSee, Color.magenta);
            if (Physics.Raycast(cam.transform.position, cam.transform.forward, out whatObjectHit, distanceToSee, layerMask))
            {
                objectHit = whatObjectHit.collider.gameObject.name;
                interactableObject = true;
                print("Hit ! " + whatObjectHit.collider.gameObject.name);

                if (scaling.objectToScale.transform.localScale == scaling.minSize)
                {
                    scaling.objectToScale.transform.Rotate(spinX, spinY, spinZ);
                }
                ProcessItemsDescripations();
                itemsDescriptionCanvas.SetActive(true);
            }
            else
            {
                if (scaling.objectToScale.transform.localScale == scaling.minSize)
                {
                    navi.transform.rotation = new Quaternion(0, 0, 0, 0);
                }
                itemsDescriptionCanvas.SetActive(false);
                print("Not Hit !");
            }
        }
    }

    private void ExecuteActions(GameObject go)
    {
        var ia = go.GetComponent<ItemAction>();
        if (ia != null)
        {
            ia.ItemMove();
        }
    }

    void ProcessItemsDescripations()
    {
        foreach (Transform child in childrenToSearhc)
        {
            if (child.GetComponent<ItemInformation>() != null)
            {
                ItemInformation iteminformation = child.GetComponent<ItemInformation>();
                if (child.name == objectHit)
                {
                    itemsDescriptionText.text = iteminformation.description;
                }
            }
        }
    }

    public class ViewableObject : UnityEngine.MonoBehaviour
    {
        public string displayText;
        public bool isInteractable;
    }
}