using System.Collections;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.CompilerServices;
using System.Xml;
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;
    private TempInventory tempInvent;
    public Inventory Inventory { get { return invent; } }
    public static PlayerInteractionHandler instance;
    [SerializeField]
    private Light flashlight;
    [SerializeField]
    private GameObject flashlight3D;
    private bool flashlightEnabled = true;
    [SerializeField]
    private int materialIndex = 1;
    private Material selMaterial;
    private Color initColor;

    private HeavyInteractableItem heavyInvent;
    public bool IsCarrying { get { return heavyInvent !=null; } }
    public bool GunEnabled { get { return this.gunEnabled; } }
    private bool gunEnabled = false;
    [SerializeField]
    private Transform carryingPos;
    public Transform CarryingPos { get { return this.carryingPos; } }

    private ItemSelector itemSelector;
    [SerializeField]
    private bool useItemSelector = true;
    [SerializeField]
    private PistolComponent pistol;
    

    // Start is called before the first frame update
    void Start()
    {
        instance = this;
        invent = this.transform.parent.GetComponent<Inventory>();
        //TEMP FIELD
        tempInvent = this.transform.parent.GetComponent<TempInventory>();

        initColor = flashlight3D.GetComponent<MeshRenderer>().materials[materialIndex].GetColor("_BaseColor");
        selMaterial = flashlight3D.GetComponent<MeshRenderer>().materials[materialIndex];
        itemSelector = ItemSelector.instance;
        pistol.gameObject.SetActive(this.gunEnabled);
        flashlightEnabled = this.flashlight.gameObject.activeSelf;
    }

    private bool receiverInRange(out int index)
    {
        int i = 0;
        foreach(InteractableItem item in this.itemsInRange)
        {
            if(item is HeavyItemReceiver)
            {
                index = i;
                return true;
            }
            i++;
        }
        index = -1;
        return false;
    }
    // Update is called once per frame
    void Update()
    {

        
        
        if(Input.GetButtonDown("Fire1"))
        {
            if (this.GunEnabled)
            {
                if (tempInvent.GetQuantityOf(this.pistol.projectileName) > 0)
                {
                    this.pistol.Fire();
                    tempInvent.Remove(this.pistol.projectileName);
                }
                    
            }
            else
            {
                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 if(item is HeavyItemReceiver)
                                {
                                    if(heavyInvent != null)
                                    {
                                        heavyInvent.transform.parent = carryingPos;
                                        heavyInvent.transform.localPosition = Vector3.zero;
                                        heavyInvent.transform.localEulerAngles = Vector3.zero;
                                        heavyItemsInRange.Remove(heavyInvent);
                                        heavyInvent.GetComponent<Rigidbody>().constraints = RigidbodyConstraints.FreezeRotation;
                                        heavyInvent.GetComponent<Rigidbody>().isKinematic = true;
                                        heavyInvent.Disable();
                                        heavyInvent.DisableAll();
                                        
                                    }
                                }

                            }
                        }
                    }
                }
                else
                {
                    int refIndex;
                    if (itemsInRange.Count > 0&&receiverInRange(out refIndex)) {
                        ((HeavyItemReceiver)itemsInRange[refIndex]).Interact(ref this.invent, ref heavyInvent);
                        heavyInvent = null;
                        
                    }
                    else
                    {
                        heavyInvent.transform.parent = null;
                        heavyInvent.GetComponent<Rigidbody>().isKinematic = false;
                        heavyInvent.EnableAll();
                        heavyInvent = null;
                    }

                   

                }

            }


        }
        if (Input.GetButtonDown("Fire2"))
        {
            //print(this.GunEnabled);
            if (!this.GunEnabled)
            {
                
                if (!flashlight.gameObject.activeSelf)
                {
                    EnableFlashlight();
                }
                else
                {
                    DisableFlashlight();
                }
            }
            else
            {
                this.pistol.LightToggle();
            }
            
        }
        if (Input.GetButtonDown("Fire3"))
        {
            if (!this.IsCarrying)
            {
                this.gunEnabled = !this.gunEnabled;
                if(!this.gunEnabled)
                    pistol.Disable();
                pistol.gameObject.SetActive(this.gunEnabled);
                if (this.gunEnabled)
                    pistol.Enable();
                

            }
        }
        if (this.GunEnabled)
        {
            this.DisableFlashlight();

            float aimAxis = Input.GetAxis("Aim");
            
        }
        else
        {

        }
    }
    public void EnableFlashlight()
    {
        
        flashlight.gameObject.SetActive(true);
        flashlight3D.GetComponent<MeshRenderer>().materials[materialIndex].SetColor("_BaseColor", initColor);
        selMaterial.SetColor("_EmissionColor", new Color(255, 255, 255, 255));
        flashlight3D.gameObject.SetActive(true);
        this.flashlightEnabled = true;
    }
    public void DisableFlashlight()
    {
        
        flashlight.gameObject.SetActive(false);
        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);
        this.flashlightEnabled = 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);
            }
        }
    }
}