YachtDice/Assets/Scripts/Shop/ShopController.cs

using UnityEngine;

public sealed class ShopController : MonoBehaviour
{
    [SerializeField] private ShopCatalog catalog;
    [SerializeField] private ShopView shopView;
    [SerializeField] private CurrencyBank currencyBank;

    private ShopModel model;

    public ShopCatalog Catalog => catalog;

    public void Initialize(ShopModel shopModel)
    {
        model = shopModel;

        shopView.OnBuyClicked += HandleBuyClicked;

        if (currencyBank != null)
            currencyBank.OnBalanceChanged += HandleCurrencyChanged;

        model.OnItemPurchased += HandleItemPurchased;

        shopView.Populate(catalog.AvailableModifiers, model);
        shopView.UpdateCurrencyDisplay(currencyBank != null ? currencyBank.Balance : 0);
    }

    private void OnDestroy()
    {
        if (shopView != null)
            shopView.OnBuyClicked -= HandleBuyClicked;

        if (currencyBank != null)
            currencyBank.OnBalanceChanged -= HandleCurrencyChanged;

        if (model != null)
            model.OnItemPurchased -= HandleItemPurchased;
    }

    private void HandleBuyClicked(ModifierData data)
    {
        model.TryPurchase(data);
    }

    private void HandleCurrencyChanged(int newBalance)
    {
        shopView.UpdateCurrencyDisplay(newBalance);
        shopView.RefreshStates(catalog.AvailableModifiers, model);
    }

    private void HandleItemPurchased(ModifierData data)
    {
        shopView.RefreshStates(catalog.AvailableModifiers, model);
    }
}