//using System.Collections;
using System.Collections.Generic;
using UnityEngine;

namespace SimpleInventorySystem
{
    public class Inventory : MonoBehaviour
    {
        // Start is called before the first frame update
        public bool hasBeenLooted = false;
        public bool itemsHaveBeenInstantiated = false;
        public bool itemsHaveBeenHidden = false;
        public List<GameObject> prefabs;
        [HideInInspector] public List<ItemUI> itemUIs;
 
        //[SerializeField] private Slot[] slots;

        void Start()
        {
            itemUIs = new List<ItemUI>();
        }

        // Update is called once per frame
        void Update()
        {
        }

        /// <summary>
        /// Instantiates the item prefab first and calls necessary stuff.
        /// </summary>
        public void Loot()
        {
            if (!hasBeenLooted && prefabs != null)
            {
                for (int i = 0; i < prefabs.Count; i++)
                {
                    if (prefabs[i] == null)
                    {
                        //prefabs.Remove(prefabs[i]);
                        continue;
                    }
                    else
                    {
                        GameObject gObj = Instantiate(prefabs[i]);
                        ItemUI item = gObj.GetComponentInChildren<ItemUI>();
                        PickUp pickUp = gObj.GetComponentInChildren<PickUp>();
                        gObj.SetActive(true);
                        gObj.transform.position = Vector3.zero;
                        gObj.transform.SetParent(InventorySystem.instance.DefaultItemSpawn, false);
                        if(gObj.GetComponent<Rigidbody>() != null)
                            gObj.GetComponent<Rigidbody>().useGravity = false;
                        if(item != null)
                        {
                            item.gameObject.SetActive(true);
                            pickUp.gameObject.SetActive(true);
                            AddOwnership(item, this);
                            //item.transform.SetParent(transform, true);
                            item.InitializeImageSize();
                            item.ResetTransform();
                            //gObj.transform.SetParent(item.transform, true);
                            //gObj.SetActive(false);
                            //item.pickUp = gObj.GetComponentInChildren<PickUp>();
                        }
                        Invoke(nameof(HideGameObjects), .1f);
                    }
                }
                Debug.Log(itemUIs.Count);
                hasBeenLooted = true;
                itemsHaveBeenInstantiated = true;
            }
            else
            {
                hasBeenLooted = true;
            }
        }

        void HideGameObjects()
        {
            if (hasBeenLooted && itemsHaveBeenInstantiated && !itemsHaveBeenHidden)
            {
                foreach (ItemUI item in itemUIs)
                {
                    Debug.Log(item.gameObject.name);
                    Debug.Log(item.pickUp.gameObject.name);
                    item.pickUp.ItemGameObject.SetActive(false);
                }
                itemsHaveBeenHidden = true;
            }
        }

        public void RemoveOwnership(ItemUI item, Inventory newOwnerInventory)
        {
            item.Inventory = newOwnerInventory;
            //items.Remove(item.pickUp.ItemGameObject);
            itemUIs.Remove(item);
            newOwnerInventory.AddOwnership(item, this);
        }
        public void AddOwnership(ItemUI item, Inventory oldOwnerInventory)
        {
            //items.Add(item.pickUp.ItemGameObject);
            itemUIs.Add(item);
            //item.Inventory = this;
        }
    }
}