using System;
using UnityEngine;
using UnityEngine.UI;
using TMPro;
using BaseGames.Inventory;
using BaseGames.Localization;

namespace BaseGames.UI.Inventory
{
    /// <summary>
    /// 背包道具格子视图（对照 <see cref="BaseGames.UI.CharmCardView"/> 的显式序列化绑定风格）。
    /// 由 <see cref="ItemInventoryPanel"/> 通过对象池实例化并调用 <see cref="Bind"/>。
    /// </summary>
    [DisallowMultipleComponent]
    public class ItemSlotView : MonoBehaviour
    {
        [Header("Visual")]
        [SerializeField] private Image     _icon;
        [SerializeField] private TMP_Text  _countText;
        [Tooltip("\"新获得\"角标节点（IsNew 时显示）。")]
        [SerializeField] private GameObject _newBadge;

        [Header("Interaction")]
        [SerializeField] private Button    _selectButton;
        [Tooltip("选中高亮节点（可空）。")]
        [SerializeField] private GameObject _selectedHighlight;

        private ItemSO _item;

        public ItemSO Item => _item;
        public Button SelectButton => _selectButton;

        /// <summary>绑定道具条目。点击时回调 onSelect（用于右侧详情面板）。</summary>
        public void Bind(InventoryEntry entry, Action<ItemSO> onSelect)
        {
            _item = entry.Item;
            if (_item == null) return;

            if (_icon != null)
            {
                _icon.sprite  = _item.icon;
                _icon.enabled = _item.icon != null;
            }

            if (_countText != null)
            {
                // 仅可叠加且数量 > 1 时显示数量角标
                bool show = _item.stackable && entry.Count > 1;
                _countText.text    = show ? entry.Count.ToString() : string.Empty;
                _countText.enabled = show;
            }

            if (_newBadge != null) _newBadge.SetActive(entry.IsNew);

            if (_selectButton != null)
            {
                _selectButton.onClick.RemoveAllListeners();
                var captured = _item;
                if (onSelect != null)
                    _selectButton.onClick.AddListener(() => onSelect(captured));
            }
        }

        public void SetSelected(bool selected)
        {
            if (_selectedHighlight != null) _selectedHighlight.SetActive(selected);
        }

        /// <summary>本地化道具名（容错：未找到键回落 itemId）。</summary>
        public string ResolveName()
        {
            if (_item == null) return string.Empty;
            string loc = LocalizationManager.Get(_item.displayNameKey, LocalizationTable.Items);
            return !string.IsNullOrEmpty(loc) && loc != _item.displayNameKey ? loc : _item.itemId;
        }
    }
}