using System.Collections.Generic;
using UnityEngine;

// InventoryUI.cs

public class BoxUIController : MonoBehaviour
{
    public Transform itemParent;

    private readonly Dictionary<int, GameObject> _slots = new();

    private void Start()
    {
        Debug.Log("BoxUI Start");
        if (itemParent == null)
        {
            Debug.LogWarning("ItemParent is null! Can not attach");
            return;
        }

        BoxManager.Instance.OnActiveBoxChanged += UpdateUI;

        // Delete existing children if any.
        foreach (Transform child in itemParent) Destroy(child.gameObject);

        if (BoxManager.Instance.ActiveBox == null)
            return;

        if (BoxManager.Instance.ActiveBox.Slots.Count == 0)
            BoxManager.Instance.Initialize();

        UpdateUI(BoxManager.Instance.ActiveBox);

        Debug.Log("Finished adding items to  toolbar slots");
    }


    public void ListChildren(GameObject parent)
    {
        foreach (Transform child in parent.transform) Debug.Log("Child: " + child.name);
    }

    public void UpdateUI(Box box)
    {
        // clear all exisitings slots
        Debug.Log("Updating UI displaying box: " + box.boxId + " / " + box.name);
        _slots.Clear();
        foreach (Transform child in itemParent) Destroy(child.gameObject);

        // Get values from inventory and redraw the inventory slots based on that.
        var slotPrefab = PrefabManager.Instance.GetSlotPrefab();
        // var itemPrefab = prefabManager.GetItemPrefab();


        foreach (var slot in box.Slots)
        {
            // Draw slots to screen
            var slotDisplay = Instantiate(slotPrefab, itemParent);

            slotDisplay.transform.localScale = new Vector3((float)0.5, (float)0.5, (float)0.5);

            var i = slot.Key;


            var slotComponent = slotDisplay.GetComponent<SlotComponent>();

            // Add prefab to slot
            slotComponent.SetSlotDetails(slot.Value);

            _slots.Add(i, slotDisplay);
        }
    }
}