Add LevelUpHud and UpgradeManager components; implement upgrade selection UI and item management

Assets/Scripts/UI/LevelUpHud.cs

@@ -0,0 +1,101 @@
+using System;
+using System.Collections.Generic;
+using Inventory;
+using KBCore.Refs;
+using Shop;
+using Systems;
+using UnityEngine;
+
+namespace UI
+{
+    public class LevelUpHud : MonoBehaviour
+    {
+        private List<UpgradeSlot> currentSlots = new();
+        private List<StatModifierItem> currentItemChoices = new();
+        private List<WeaponItem> currentWeaponChoices = new(); 
+        
+        [SerializeField] private GameObject itemsContainer;
+        [SerializeField] private GameObject upgradeSlotPrefab;
+        [SerializeField] private int itemsCount = 3;
+        [SerializeField] private int weaponsCount = 2;
+        [SerializeField, Scene] private ShopManager shopManager;
+        [SerializeField, Scene] private UpgradeManager upgradeManager;
+
+        private void OnEnable()
+        {
+            Hide();
+            GameManager.Instance.Player.attributes.OnLevelUp += OnLevelUp;
+        }
+
+        private void OnDisable()
+        {
+            GameManager.Instance.Player.attributes.OnLevelUp -= OnLevelUp;
+        }
+        
+        private void OnLevelUp()
+        {
+            Show();
+        }
+
+        private void Show()
+        {
+            Time.timeScale = 0f;
+            ClearSlots();
+            
+            currentItemChoices = shopManager.DrawRandomItems(itemsCount);
+            currentWeaponChoices = shopManager.DrawRandomWeapons(weaponsCount);
+            
+            foreach (var item in currentItemChoices)
+            {
+                var slot = Instantiate(upgradeSlotPrefab, itemsContainer.transform);
+                if (slot.TryGetComponent(out UpgradeSlot upgradeSlot))
+                {
+                    upgradeSlot.Setup(item, upgradeManager);
+                    currentSlots.Add(upgradeSlot);
+                }
+            }
+            
+            foreach (var weapon in currentWeaponChoices)
+            {
+                var slot = Instantiate(upgradeSlotPrefab, itemsContainer.transform);
+                if (slot.TryGetComponent(out UpgradeSlot upgradeSlot))
+                {
+                    upgradeSlot.Setup(weapon, upgradeManager);
+                    currentSlots.Add(upgradeSlot);
+                }
+            }
+            
+            itemsContainer.SetActive(true);
+        }
+
+        private void Hide()
+        {
+            Time.timeScale = 1f;
+            itemsContainer.SetActive(false);
+            ClearSlots();
+        }
+        
+        private void ClearSlots()
+        {
+            foreach (Transform child in itemsContainer.transform) Destroy(child.gameObject);
+            
+            currentSlots.Clear();
+            currentItemChoices.Clear();
+            currentWeaponChoices.Clear();
+            upgradeManager.SetHasSelectedUpgrade(false);
+        }
+
+        public void MarkAsSelected(ScriptableObject item)
+        {
+            foreach (var slot in currentSlots)
+            {
+                if (slot.MatchesItem(item))
+                {
+                    slot.MarkAsSelected();
+                    Hide();
+                    return;
+                }
+            }
+        }
+    }
+}