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

namespace SimpleInventorySystem
{
    public class LootContainer : MonoBehaviour
    {
        // Start is called before the first frame update
        public bool hasBeenLooted = false;
        public bool itemsHaveBeenInstantiated = false;
        public bool itemsHaveBeenHidden = false;
        [HideInInspector] public List<ItemUI> itemUIs;

        /// <summary>
        /// Instantiates the item prefab first and calls necessary stuff.
        /// </summary>
        public void Loot()
        {
            if (!hasBeenLooted)
            {
                itemUIs = new List<ItemUI>();
                Size size = GenerateContainerSize();
                PopulateContainer(size);
                hasBeenLooted = 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 ScriptableLootContainer data;
        
        // Start is called before the first frame update
        void Start()
        {
            if (data == null)
            {
                Debug.LogError("Loot Container should have a Scriptable Loot Container referenced.");
                return;
            }
        }
        
        public Size GenerateContainerSize()
        {
            int width = Random.Range(data.minimumContainerSize.Width, data.maximumContainerSize.Width + 1);
            int height = Random.Range(data.minimumContainerSize.Height, data.maximumContainerSize.Height + 1);
            return new Size(width, height);
        }

        public void PopulateContainer(Size size)
        {
            int cells = size.Width * size.Height;
            int limit = 50;
            while(limit > 0 && cells > 0)
            {
                GameObject item = Spawn();
                ItemUI itemUI = item.GetComponentInChildren<ItemUI>();
                PickUp pickUp = item.GetComponentInChildren<PickUp>();
                item.SetActive(true);
                item.transform.position = Vector3.zero;
                item.transform.SetParent(InventorySystem.instance.DefaultItemSpawn, false);
                if (item.GetComponent<Rigidbody>() != null)
                    item.GetComponent<Rigidbody>().useGravity = false;
                if (itemUI != null)
                {
                    itemUIs.Add(itemUI);
                    itemUI.gameObject.SetActive(true);
                    pickUp.gameObject.SetActive(true);
                    //AddOwnership(item, this);
                    //item.transform.SetParent(transform, true);
                    itemUI.InitializeImageSize();
                    itemUI.ResetTransform();
                    //gObj.transform.SetParent(item.transform, true);
                    //gObj.SetActive(false);
                    //item.pickUp = gObj.GetComponentInChildren<PickUp>();
                }

                cells -= itemUI.width * itemUI.height;
                limit--;
            }
            Invoke(nameof(HideGameObjects), .1f);
            itemsHaveBeenInstantiated = true;
        }

        private GameObject Spawn()
        {
            // RNG rarity
            float rate = Random.Range(0f, 1f);
            RarityType rarity = data.GetRandomRarity(rate);

            // RNG item
            GameObject prefab = data.GetRandomItem(rarity);
            GameObject newItem = Instantiate(prefab);
            Debug.Log($"Loot Container: {newItem.name}");

            return newItem;
        }

        // Update is called once per frame
        void Update()
        {
            if (data == null)
            {
                return;
            }
        }

        /*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;
        }*/
    }
}