YachtDice/Assets/Scripts/Inventory/InventoryView.cs

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

namespace YachtDice.Inventory
{

public sealed class InventoryView : MonoBehaviour
{
    [SerializeField] private Transform slotContainer;
    [SerializeField] private InventorySlotView slotPrefab;
    [SerializeField] private TMP_Text slotCountText;
    [SerializeField] private Button closeButton;

    private readonly List<InventorySlotView> spawnedSlots = new();

    public event Action<ModifierRuntime> OnActivateClicked;
    public event Action<ModifierRuntime> OnDeactivateClicked;
    public event Action<ModifierRuntime> OnSellClicked;

    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 Refresh(IReadOnlyList<ModifierRuntime> owned, int maxSlots)
    {
        ClearSlots();

        int activeCount = 0;

        for (int i = 0; i < owned.Count; i++)
        {
            var runtime = owned[i];
            if (runtime.IsActive) activeCount++;

            var slot = Instantiate(slotPrefab, slotContainer);
            slot.Setup(runtime, activeCount <= maxSlots);
            slot.OnActivateClicked += HandleActivate;
            slot.OnDeactivateClicked += HandleDeactivate;
            slot.OnSellClicked += HandleSell;
            spawnedSlots.Add(slot);
        }

        if (slotCountText != null)
            slotCountText.text = $"{activeCount}/{maxSlots}";
    }

    private void ClearSlots()
    {
        for (int i = 0; i < spawnedSlots.Count; i++)
        {
            spawnedSlots[i].OnActivateClicked -= HandleActivate;
            spawnedSlots[i].OnDeactivateClicked -= HandleDeactivate;
            spawnedSlots[i].OnSellClicked -= HandleSell;
            Destroy(spawnedSlots[i].gameObject);
        }
        spawnedSlots.Clear();
    }

    private void HandleActivate(ModifierRuntime runtime) => OnActivateClicked?.Invoke(runtime);
    private void HandleDeactivate(ModifierRuntime runtime) => OnDeactivateClicked?.Invoke(runtime);
    private void HandleSell(ModifierRuntime runtime) => OnSellClicked?.Invoke(runtime);
}
}