StorageSystem - Part 1

using UnityEngine;
using System.Collections.Generic;

public class StorageSystem : MonoBehaviour
{
    public static StorageSystem Instance { get; private set; }

    private Dictionary<Item, List<Item>> storageInventories = new Dictionary<Item, List<Item>>();
    private InventorySystem inventorySystem;
    private UIManager uiManager;

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

    private void Start()
    {
        inventorySystem = InventorySystem.Instance;
        uiManager = UIManager.Instance;
        if (uiManager == null)
        {
            Debug.LogError("Failed to find UIManager instance");
        }
    }

    public void OpenStorage(Item storageItem)
    {
        if (uiManager == null)
        {
            Debug.LogError("UIManager reference is null in StorageSystem");
            return;
        }

        if (storageItem == null)
        {
            Debug.LogError("Attempted to open storage for a null item");
            return;
        }

        uiManager.ShowInventoryPrompt(storageItem);
    }

    public void AddItemToStorage(Item storageItem, Item itemToStore)
    {
        if (!storageInventories.ContainsKey(storageItem))
        {
            storageInventories[storageItem] = new List<Item>();
        }
        storageInventories[storageItem].Add(itemToStore);
    }

    public List<Item> GetStorageInventory(Item storageItem)
    {
        if (storageInventories.TryGetValue(storageItem, out List<Item> items))
        {
            return items;
        }
        return new List<Item>();
    }

    public void RemoveItemFromStorage(Item storageItem, Item itemToRemove)
    {
        if (storageInventories.TryGetValue(storageItem, out List<Item> items))
        {
            items.Remove(itemToRemove);
        }
    }
}