Selling Functionality, Picking up items, Basic computer

Assets/HUDManager.cs

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+using System;
+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+
+public class HUDManager : MonoBehaviour {
+    public static HUDManager Instance { get; private set; }
+    
+    [SerializeField] private GameObject _computerHUD;
+    [SerializeField] private GameObject _sellScreenHUD;
+    
+    private GameObject _currentHUD;
+    
+    public bool isUiOpen => _currentHUD != null;
+
+    private void Awake() {
+        if (Instance != null) {
+            Debug.LogError("What? 2 HudManagers crazy!!!");
+        }
+        Instance = this;
+    }
+    
+    private void Update() {
+        CheckClose();
+    }
+    
+    public void ShowComputerHUD() {
+        ShowHUD(_computerHUD);
+    }
+    
+    public void ShowSellScreenHUD(SellCounter counter) {
+       ShowHUD(_sellScreenHUD);
+    }
+    
+    private void ShowHUD(GameObject hud) {
+        if (_currentHUD != null) {
+            _currentHUD.SetActive(false);
+        }
+        _currentHUD = hud;
+        _currentHUD.SetActive(true);
+    }
+    
+    public void HideCurrentHUD() {
+        if (_currentHUD != null) {
+            _currentHUD.SetActive(false);
+            _currentHUD = null;
+        }
+    }
+
+    public void CheckClose() {
+        if (!Input.GetKeyDown(KeyCode.Escape)) return;
+        if (_currentHUD == null) return;
+        
+        HideCurrentHUD();
+    }
+    
+    
+    //TODO: ask if its matters if i just return a SellSCreenBehaviour, or route them through the HUDManager
+    public void SellItem(SellCounter counter, Object sellingObject) {
+        Debug.Log(_sellScreenHUD.GetComponent<SellScreenController>());
+        this.ShowSellScreenHUD(counter);
+        _sellScreenHUD.GetComponent<SellScreenController>().SetItem(counter, sellingObject);
+    }
+}