Add Shop system with ShopManager, ShopUI, and ShopSlotUI; implement item purchasing and shop UI functionality

Assets/Scripts/Shop/ShopManager.cs

@@ -0,0 +1,96 @@
+using System;
+using System.Collections.Generic;
+using Inventory;
+using Sirenix.Serialization;
+using Systems;
+using UnityEngine;
+using Random = UnityEngine.Random;
+
+namespace Shop
+{
+    public class ShopManager : MonoBehaviour
+    {
+        private List<StatModifierItem> currentItemChoices = new();
+        private List<WeaponItem> currentWeaponChoices = new();
+        
+        [SerializeField] private ShopUI shopUI;
+        [SerializeField] private InventoryManager inventoryManager;
+
+        [SerializeField] private int itemsPerShop = 4;
+        [OdinSerialize, SerializeField] private List<StatModifierItem> possibleItems = new();
+        [OdinSerialize, SerializeField] private List<WeaponItem> possibleWeapons = new();
+
+        private void OnEnable()
+        {
+            // GameManager.Instance.OnRoundEnd += OpenShop;
+            GameManager.Instance.OnStoreOpen += OpenShop;
+        }
+
+        private void OnDisable()
+        {
+            // GameManager.Instance.OnRoundEnd -= OpenShop;
+            GameManager.Instance.OnStoreOpen -= OpenShop;
+        }
+
+        public void CloseShop()
+        {
+            shopUI.Hide();
+            Time.timeScale = 1f;
+        }
+
+        public void BuyItem(StatModifierItem item, int price)
+        {
+            if (GameManager.Instance.Coins < price) return;
+            
+            GameManager.Instance.SpendCoins(price);
+            inventoryManager.EquipItem(item);
+            shopUI.MarkAsPurchased(item);
+        }
+        
+        public void BuyWeapon(WeaponItem weapon, int price)
+        {
+            if (GameManager.Instance.Coins < price) return;
+            
+            GameManager.Instance.SpendCoins(price);
+            inventoryManager.EquipWeapon(weapon);
+            shopUI.MarkAsPurchased(weapon);
+        }
+        
+        public void RerollShop()
+        {
+            currentItemChoices = DrawRandomItems(possibleItems, itemsPerShop);
+            currentWeaponChoices = DrawRandomItems(possibleWeapons, itemsPerShop);
+            
+            shopUI.Show(currentItemChoices, currentWeaponChoices, this);
+        }
+        
+        private void OpenShop()
+        {
+            OpenShop(GameManager.Instance.CurrentRound);
+        }
+
+        private void OpenShop(int round)
+        {
+            currentItemChoices = DrawRandomItems(possibleItems, itemsPerShop);
+            currentWeaponChoices = DrawRandomItems(possibleWeapons, itemsPerShop);
+            
+            shopUI.Show(currentItemChoices, currentWeaponChoices, this);
+            Time.timeScale = 0f;
+        }
+
+        private List<T> DrawRandomItems<T>(List<T> pool, int count)
+        {
+            var result = new List<T>();
+            var poolCopy = new List<T>(pool);
+
+            for (var i = 0; i < count && poolCopy.Count > 0; i++)
+            {
+                var idx = Random.Range(0, poolCopy.Count);
+                result.Add(poolCopy[idx]);
+                poolCopy.RemoveAt(idx);
+            }
+            
+            return result;
+        }
+    }
+}

Assets/Scripts/Shop/ShopManager.cs.meta

@@ -0,0 +1,3 @@
+fileFormatVersion: 2
+guid: 3f37c728615643a1abc988bbfd34986c
+timeCreated: 1752272671

Assets/Scripts/Shop/ShopSlotUI.cs

@@ -0,0 +1,56 @@
+using Inventory;
+using Systems;
+using TMPro;
+using UnityEngine;
+using UnityEngine.UI;
+
+namespace Shop
+{
+    public class ShopSlotUI : MonoBehaviour
+    {
+        private ScriptableObject item;
+        private ShopManager shopManager;
+        private int price;
+        
+        [SerializeField] private Image icon;
+        [SerializeField] private TextMeshProUGUI nameText;
+        [SerializeField] private TextMeshProUGUI descriptionText;
+        [SerializeField] private TextMeshProUGUI priceText;
+        [SerializeField] private Button purchaseButton;
+        
+        public void Setup(StatModifierItem item, ShopManager manager)
+        {
+            this.item = item;
+            shopManager = manager;
+            price = item.price;
+
+            icon.sprite = item.icon;
+            nameText.text = item.name;
+            descriptionText.text = item.description;
+            priceText.text = $"Price: {price}";
+
+            purchaseButton.interactable = GameManager.Instance.Coins >= price;
+            purchaseButton.onClick.AddListener(() => shopManager.BuyItem(item, price));
+        }
+        
+        public void Setup(WeaponItem weapon, ShopManager manager)
+        {
+            item = weapon;
+            shopManager = manager;
+            price = weapon.price;
+            icon.sprite = weapon.icon;
+            nameText.text = weapon.weaponName;
+            descriptionText.text = weapon.description;
+            priceText.text = $"Price: {price}";
+            purchaseButton.interactable = GameManager.Instance.Coins >= price;
+            purchaseButton.onClick.AddListener(() => shopManager.BuyWeapon(weapon, price));
+        }
+
+        public bool MatchesItem(ScriptableObject item) => this.item == item;
+
+        public void MarkAsPurchased()
+        {
+            purchaseButton.interactable = false;
+        }
+    }
+}

Assets/Scripts/Shop/ShopSlotUI.cs.meta

@@ -0,0 +1,3 @@
+fileFormatVersion: 2
+guid: 1d76cc9c15ed441b930dbe52e5e9af5f
+timeCreated: 1752273703

Assets/Scripts/Shop/ShopUI.cs

@@ -0,0 +1,83 @@
+using System;
+using System.Collections.Generic;
+using Inventory;
+using Systems;
+using TMPro;
+using UnityEngine;
+using UnityEngine.UI;
+
+namespace Shop
+{
+    public class ShopUI : MonoBehaviour
+    {
+        [SerializeField] private GameObject shopPanel;
+        [SerializeField] private Transform itemSlotParent;
+        [SerializeField] private Transform weaponSlotParent;
+        [SerializeField] private ShopSlotUI slotPrefab;
+        [SerializeField] private TextMeshProUGUI roundsText;
+        
+        private List<ShopSlotUI> currentSlots = new();
+
+        private void OnEnable()
+        {
+            GameManager.Instance.OnRoundEnd += UpdateRoundText;
+        }
+        
+        private void OnDisable()
+        {
+            GameManager.Instance.OnRoundEnd -= UpdateRoundText;
+        }
+
+        public void Show(List<StatModifierItem> items, List<WeaponItem> weapons, ShopManager shopManager)
+        {
+            GameManager.Instance.StoreIsClosed = false;
+            UpdateRoundText(GameManager.Instance.CurrentRound);
+            
+            shopPanel.SetActive(true);
+            ClearSlots();
+
+            foreach (var item in items)
+            {
+                var slot = Instantiate(slotPrefab, itemSlotParent);
+                slot.Setup(item, shopManager);
+                currentSlots.Add(slot);
+            }
+            
+            foreach (var weapon in weapons)
+            {
+                var slot = Instantiate(slotPrefab, weaponSlotParent);
+                slot.Setup(weapon, shopManager);
+                currentSlots.Add(slot);
+            }
+        }
+
+        public void Hide()
+        {
+            GameManager.Instance.StoreIsClosed = true;
+            shopPanel.SetActive(false);
+            ClearSlots();
+        }
+
+        public void MarkAsPurchased(ScriptableObject item)
+        {
+            foreach (var slot in currentSlots)
+            {
+                if (slot.MatchesItem(item)) slot.MarkAsPurchased();
+            }
+        }
+        
+        private void ClearSlots()
+        {
+            foreach (var slot in currentSlots) Destroy(slot.gameObject);
+            
+            currentSlots.Clear();
+        }
+        
+        private void UpdateRoundText(int round)
+        {
+            var nextRound = Mathf.Min(round + 1, GameManager.Instance.MaxRounds);
+            roundsText.text = $"Round: {nextRound}/{GameManager.Instance.MaxRounds}";
+        }
+
+    }
+}

Assets/Scripts/Shop/ShopUI.cs.meta

@@ -0,0 +1,3 @@
+fileFormatVersion: 2
+guid: abe11e705b4f47feb25a4e4845d1e6e9
+timeCreated: 1752272723