YachtDice/Assets/Scripts/Shop/ShopView.cs

using System;
using System.Collections.Generic;
using TMPro;
using UnityEngine;
using UnityEngine.UI;
using YachtDice.Modifiers.Definition;

namespace YachtDice.Shop
{
    public class ShopView : MonoBehaviour
    {
        [SerializeField] private Transform itemContainer;
        [SerializeField] private ShopItemView itemPrefab;
        [SerializeField] private TMP_Text currencyText;
        [SerializeField] private Button closeButton;

        private readonly List<ShopItemView> spawnedItems = new();

        public event Action<ModifierDefinitionSO> OnBuyClicked;

        private void Awake()
        {
            if (closeButton != null)
                closeButton.onClick.AddListener(Hide);
        }

        private void OnDestroy()
        {
            if (closeButton != null)
                closeButton.onClick.RemoveListener(Hide);
        }

        public void Show() => gameObject.SetActive(true);
        public void Hide() => gameObject.SetActive(false);
        public bool IsVisible => gameObject.activeSelf;

        public void Populate(IReadOnlyList<ModifierDefinitionSO> catalog, ShopModel model)
        {
            ClearItems();

            for (int i = 0; i < catalog.Count; i++)
            {
                var def = catalog[i];
                if (def == null) continue;

                var item = Instantiate(itemPrefab, itemContainer);
                var state = model.GetItemState(def);
                item.Setup(def, state);
                item.OnBuyClicked += HandleBuy;
                spawnedItems.Add(item);
            }
        }

        public void RefreshStates(IReadOnlyList<ModifierDefinitionSO> catalog, ShopModel model)
        {
            for (int i = 0; i < spawnedItems.Count && i < catalog.Count; i++)
            {
                var state = model.GetItemState(catalog[i]);
                spawnedItems[i].SetState(state);
            }
        }

        public void UpdateCurrencyDisplay(int currency)
        {
            if (currencyText != null)
                currencyText.text = currency.ToString();
        }

        private void ClearItems()
        {
            for (int i = 0; i < spawnedItems.Count; i++)
            {
                spawnedItems[i].OnBuyClicked -= HandleBuy;
                Destroy(spawnedItems[i].gameObject);
            }
            spawnedItems.Clear();
        }

        private void HandleBuy(ModifierDefinitionSO def) => OnBuyClicked?.Invoke(def);
    }
}