using System.Collections;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.CompilerServices;
using Unity.VisualScripting;
using UnityEngine;

[RequireComponent(typeof(Collider))]
public class PlayerInteractionHandler : MonoBehaviour
{
    private List<InteractableItem> itemsInRange= new List<InteractableItem>();
    private List<HeavyInteractableItem> heavyItemsInRange = new List<HeavyInteractableItem>();
    private Inventory invent;
    public Inventory Inventory { get { return invent; } }
    public static PlayerInteractionHandler instance;
    [SerializeField]
    private Light flashlight;
    [SerializeField]
    private GameObject flashlight3D;
    [SerializeField]
    private int materialIndex = 1;
    private Material selMaterial;
    private Color initColor;

    private HeavyInteractableItem heavyInvent;
    public bool IsCarrying { get { return heavyInvent !=null; } }
    [SerializeField]
    private Transform carryingPos;
    

    // Start is called before the first frame update
    void Start()
    {
        instance = this;
        invent = this.transform.parent.GetComponent<Inventory>();
        initColor = flashlight3D.GetComponent<MeshRenderer>().materials[materialIndex].GetColor("_BaseColor");
        selMaterial = flashlight3D.GetComponent<MeshRenderer>().materials[materialIndex];

    }

    // Update is called once per frame
    void Update()
    {
        //
        if(Input.GetButtonDown("Fire1"))
        {
            if (!IsCarrying)
            {
                int t_index = 0;
                bool pickupFound = false;
                if (itemsInRange.Count > 0)
                {
                    while (t_index<itemsInRange.Count&&!itemsInRange[t_index].CanPickup)
                    {
                        t_index++;
                    }
                    if (t_index != itemsInRange.Count)
                    {
                        pickupFound = true;
                        invent.AddItem(itemsInRange[t_index]);
                        itemsInRange[0].transform.gameObject.SetActive(false);
                        itemsInRange.Remove(itemsInRange[t_index]);
                    }
                    
                    
                }
                else if (heavyItemsInRange.Count > 0)
                {
                    pickupFound = true;
                    heavyInvent = heavyItemsInRange[0];

                    heavyInvent.transform.parent = carryingPos;
                    heavyInvent.transform.localPosition = Vector3.zero;
                    heavyInvent.GetComponent<Rigidbody>().isKinematic = true;
                    heavyItemsInRange.Remove(heavyItemsInRange[0]);
                    heavyInvent.Disable();
                    heavyInvent.DisableAll();
                }
                if (!pickupFound)
                {
                    foreach(InteractableItem item in itemsInRange)
                    {
                        if (!item.CanPickup)
                        {
                            if(!item.Interact(ref invent, ref heavyInvent))
                            {
                                item.Interact();
                            }

                        }
                    }   
                }
            }
            else
            {
                heavyInvent.transform.parent = null;
                heavyInvent.GetComponent<Rigidbody>().isKinematic = false;
                heavyInvent.EnableAll();
                heavyInvent = null;
                
            }
           
        }
        if (Input.GetButtonDown("Fire2"))
        {
            flashlight.gameObject.SetActive(!flashlight.gameObject.activeSelf);
            if (flashlight.gameObject.activeSelf)
            {
                flashlight3D.GetComponent<MeshRenderer>().materials[materialIndex].SetColor("_BaseColor", initColor);
                selMaterial.SetColor("_EmissionColor", new Color(255,255, 255, 255));
                flashlight3D.gameObject.SetActive(true);
            }
            else
            {
                flashlight3D.GetComponent<MeshRenderer>().materials[materialIndex].SetColor("_BaseColor", new Color(0, 0, 0));
                selMaterial.SetColor("_EmissionColor", new Color(0, 0, 0, 0));
                flashlight3D.gameObject.SetActive(false);
            }
        }
    }

    private void OnTriggerEnter(Collider other)
    {
        if(other.gameObject.GetComponent<InteractableItem>() != null)
        {
            InteractableItem item = other.gameObject.GetComponent<InteractableItem>();
            if(item is InteractableItem && item is not HeavyInteractableItem)
            {
                ((InteractableItem)item).Enable();
                itemsInRange.Add(item);
            }else if(item is HeavyInteractableItem)
            {
                ((HeavyInteractableItem)item).Enable();
                heavyItemsInRange.Add((HeavyInteractableItem)item);
            }

        }
    }
    private void OnTriggerExit(Collider other)
    {
        if (other.gameObject.GetComponent<InteractableItem>() != null)
        {
            InteractableItem item = other.gameObject.GetComponent<InteractableItem>();
            if (item is InteractableItem && item is not HeavyInteractableItem)
            {
                ((InteractableItem)item).Disable();
                itemsInRange.Remove(item);

            }
            else if (item is HeavyInteractableItem)
            {
                ((HeavyInteractableItem)item).Disable();
                //itemsInRange.Remove((HeavyInteractableItem)(item));
                heavyItemsInRange.Remove((HeavyInteractableItem)item);
            }
        }
    }
}