station_obscurum_unity/Assets/Scripts/Item/SpecialItemCycler.cs

using System;
using System.Collections.Generic;
using TMPro;
using UnityEngine;
using UnityEngine.UI;

[Serializable]
public class ItemImageRef
{
    public string name;
    public GameObject item;
    public Sprite icon;
}

public class SpecialItemCycler : MonoBehaviour
{
    [SerializeField] private List<ItemImageRef> spawnableItems = new();

    [SerializeField] private List<ItemImageRef> shootableItems = new();

    [SerializeField] private PlayerInteractionHandler interactionHandler;

    [SerializeField] private PistolComponent pistol;

    [SerializeField]
    //private Inventory invent;
    private TempInventory invent;

    [SerializeField] private Image selectedImage;

    [SerializeField] private TMP_Text selectedQuantityText;

    private int shootableIndex;
    private int spawnableIndex;
    private Color sqtInitColor;


    // Start is called before the first frame update
    private void Start()
    {
        sqtInitColor = selectedQuantityText.color;
    }

    // Update is called once per frame
    private void Update()
    {
        if (interactionHandler.GunEnabled)
        {
            pistol.projectilePrefab = shootableItems[shootableIndex % shootableItems.Count].item;
            pistol.projectileName = shootableItems[shootableIndex % shootableItems.Count].name;
        }

        SetImage();
        if (Input.GetButtonDown("CycleItems"))
        {
            if (interactionHandler.GunEnabled)
            {
                shootableIndex = (shootableIndex + 1) % shootableItems.Count;
                selectedImage.sprite = shootableItems[shootableIndex].icon;
            }
            else
            {
                spawnableIndex = (spawnableIndex + 1) % spawnableItems.Count;
                selectedImage.sprite = spawnableItems[spawnableIndex].icon;
            }

            if (selectedImage.sprite == null)
                selectedImage.color = new Color(selectedImage.color.r, selectedImage.color.g, selectedImage.color.b, 0);
            else
                selectedImage.color = new Color(selectedImage.color.r, selectedImage.color.g, selectedImage.color.b, 1);
        }

        if (Input.GetButtonDown("TempPlace"))
            if (invent.GetQuantityOf(spawnableItems[spawnableIndex].name) > 0)
                if (!interactionHandler.GunEnabled && spawnableItems[spawnableIndex].item != null)
                {
                    var prefab = spawnableItems[spawnableIndex].item;
                    var instance = Instantiate(prefab, interactionHandler.CarryingPos);
                    instance.transform.localPosition = Vector3.zero;
                    instance.transform.parent = null;
                    invent.Remove(spawnableItems[spawnableIndex].name);
                }
    }

    private void SetImage()
    {
        if (interactionHandler.GunEnabled)
        {
            selectedImage.sprite = shootableItems[shootableIndex].icon;
            selectedQuantityText.text = invent.GetQuantityOf(shootableItems[shootableIndex].name).ToString();
        }
        else
        {
            selectedImage.sprite = spawnableItems[spawnableIndex].icon;
            selectedQuantityText.text = invent.GetQuantityOf(spawnableItems[spawnableIndex].name).ToString();
        }

        if (selectedImage.sprite == null)
        {
            selectedImage.color = new Color(selectedImage.color.r, selectedImage.color.g, selectedImage.color.b, 0);
            selectedQuantityText.gameObject.SetActive(false);
        }
        else
        {
            selectedImage.color = new Color(selectedImage.color.r, selectedImage.color.g, selectedImage.color.b, 1);
            selectedQuantityText.gameObject.SetActive(true);
            if (selectedQuantityText.text == "0")
                selectedQuantityText.color = Color.red;
            else
                selectedQuantityText.color = sqtInitColor;
        }
    }
}