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3DSurvivalGame

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3DSurvivalGame
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using System;
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;

public class InventorySystem : MonoBehaviour
{
    public GameObject ItemInfoUI;

    public static InventorySystem Instance { get; set; }

    public GameObject inventoryScreenUI;
    public bool isOpen;
    public bool isFull;

    public List<GameObject> slotList = new List<GameObject>();

    public List<string> itemList = new List<string>();

    private GameObject itemToAdd;

    private GameObject whatSlotToEquip;

    public GameObject pickupAlert;
    public Text pickupName;
    public Image pickupImage;


    private void Awake()
    {
        if (Instance != null && Instance != this)
        {
            Destroy(gameObject);
        }
        else
        {
            Instance = this;
        }
    }


    void Start()
    {
        isOpen = false;
        isFull = false;
        PopulateSlotList();

        Cursor.visible = false;
    }


    private void PopulateSlotList()
    {
        foreach (Transform child in inventoryScreenUI.transform)
        {
            if (child.CompareTag("Slot"))
            {

                slotList.Add(child.gameObject);
            }

        }
    }


    void Update()
    {

        if (Input.GetKeyDown(KeyCode.I) && !isOpen)
        {
            inventoryScreenUI.SetActive(true);
            Cursor.lockState = CursorLockMode.None;
            Cursor.visible = true;

            SelectionManager.Instance.DisableSelection();
            SelectionManager.Instance.GetComponent<SelectionManager>().enabled = false;

            isOpen = true;

        }
        else if (Input.GetKeyDown(KeyCode.I) && isOpen)
        {
            inventoryScreenUI.SetActive(false);
            isOpen = false;
            if (!CraftingSystem.Instance.isOpen)
            {
                Cursor.lockState = CursorLockMode.Locked;
                Cursor.visible = false;
                Cursor.visible = false;
                SelectionManager.Instance.EnableSelection();
                SelectionManager.Instance.GetComponent<SelectionManager>().enabled = true;
    
            }

        }
    }
    public void AddToInventory(string itemName)
    {
        SoundManager.Instance.PlaySound(SoundManager.Instance.dropItemSound);

        whatSlotToEquip = FindNextEmptySlot();
        itemToAdd = Instantiate(Resources.Load<GameObject>(itemName), whatSlotToEquip.transform.position, whatSlotToEquip.transform.rotation);
        itemToAdd.transform.SetParent(whatSlotToEquip.transform);
        itemList.Add(itemName);

        TriggerPickupPopup(itemName, itemToAdd.GetComponent<Image>().sprite);

        ReCalculateList();
        CraftingSystem.Instance.RefreshNeededItems();
    }

    void TriggerPickupPopup(string itemName, Sprite itemSprite)
    {

        pickupAlert.SetActive(true);
        pickupName.text = itemName;
        pickupImage.sprite = itemSprite;
        StartCoroutine(closePopup());
    }

    IEnumerator closePopup()
    {

        yield return new WaitForSeconds(5);
        pickupAlert.SetActive(false);
    }

    private GameObject FindNextEmptySlot()
    {
        foreach (GameObject slot in slotList)
        {
            if (slot.transform.childCount == 0)
            {
                return slot;
            }
        }
        return new GameObject();
    }

    public bool CheckSlotsAvailable(int emptyNeeded)
    {
        int fullSlots = 0;
        foreach (GameObject slot in slotList)
        {
            if (slot.transform.childCount > 0)
            {
                fullSlots++;
            }


        }
        return fullSlots < slotList.Count - emptyNeeded;
    }

    public void RemoveItem(string nameToRemove, int amountToRemove)
    {
        int counter = amountToRemove;
        for (var i = slotList.Count - 1; i >= 0; i--)
        // foreach (GameObject slot in slotList)
        {
            if (slotList[i].transform.childCount > 0)
            {
                if (slotList[i].transform.GetChild(0).name == nameToRemove + "(Clone)" && counter != 0)
                {
                    DestroyImmediate(slotList[i].transform.GetChild(0).gameObject);
                    counter--;

                }
            }

        }

        ReCalculateList();
        CraftingSystem.Instance.RefreshNeededItems();
    }

    public void ReCalculateList()
    {
        itemList.Clear();
        foreach (GameObject slot in slotList)
        {
            if (slot.transform.childCount > 0)
            {
                string name = slot.transform.GetChild(0).name;
                itemList.Add(name.Replace("(Clone)", ""));
            }
        }

    }


}