using System;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.EventSystems;
using UnityEngine.UIElements;

public class InventoryScreen : MonoBehaviour
{
    [SerializeField]
    private VisualTreeAsset uiItemAsset;

    private UIDocument uiDocument;

    private VisualElement root;
    private VisualElement itemList;
    private Label headerLabel;
    private Label footerLabel;

    private IInventoryHolder inventoryHolder;
    private IInventoryHolder targetInventoryHolder;

    void OnEnable()
    {
        uiDocument = GetComponent<UIDocument>();

        root = uiDocument.rootVisualElement;
        var inventory = root.Q("Inventory");

        root.style.display = DisplayStyle.None;

        itemList = inventory.Q("Inventory").Q("ContainerScroll");
        headerLabel = inventory.Q<Label>("Header");
        footerLabel = inventory.Q<Label>("Footer");

        root.RegisterCallback<ClickEvent>(OnRootClicked);
        inventory.RegisterCallback<ClickEvent>(evt => evt.StopPropagation());
    }

    private void OnRootClicked(ClickEvent evt)
    {
        Debug.Log("Root Clicked");
        Hide();
    }

    private void Show()
    {
        root.style.display = DisplayStyle.Flex;
    }

    private void Hide()
    {
        root.style.display = DisplayStyle.None;
    }

    public void Display(IInventoryHolder inventory, IInventoryHolder targetInventory = null)
    {
        this.inventoryHolder = inventory;
        this.targetInventoryHolder = inventory;

        itemList.Clear();

        foreach (var item in inventory.Inventory.Items)
        {
            var child = uiItemAsset.Instantiate();
            // child.AddToClassList(".item");
            child.Q<Label>("Name").text = item.Key;
            child.Q<Label>("Quantity").text = item.Value.ToString();
            itemList.Add(child);
        }

        headerLabel.text = inventory.Name;
        footerLabel.text = $"Свободно: {inventory.Inventory.Free}";

        Show();
    }
}