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

namespace BaseGames.UI
{
    /// <summary>
    /// 护符卡片视图组件。
    ///
    /// 设计动机：取代 <see cref="CharmEquipPanel"/> 中基于
    /// <see cref="Component.GetComponentsInChildren{T}(bool)"/> + 数组索引的脆弱绑定方式，
    /// 通过 Inspector 显式序列化引用，避免每次重建列表时的反射开销与索引漂移风险。
    ///
    /// 用法：在卡片 Prefab 上挂载此组件并连接子节点引用，<see cref="CharmEquipPanel"/>
    /// 仅需调用 <see cref="Bind"/> 即可完成数据 → UI 的同步。
    /// </summary>
    [DisallowMultipleComponent]
    public class CharmCardView : MonoBehaviour
    {
        [Header("Visual")]
        [SerializeField] private Image    _icon;
        [SerializeField] private GameObject _iconRoot;     // 可选：无 icon 时整体隐藏

        [Header("Text")]
        [SerializeField] private TMP_Text _nameText;
        [SerializeField] private TMP_Text _notchCostText;
        [SerializeField] private TMP_Text _descriptionText;
        [SerializeField] private TMP_Text _equipBadgeText;  // 已装备角标 ("✓")

        [Header("Interaction")]
        [SerializeField] private Button   _actionButton;

        /// <summary>
        /// 将护符数据绑定到视图。
        /// </summary>
        /// <param name="charm">数据源。</param>
        /// <param name="isEquipped">是否已装备（决定按钮行为与角标显示）。</param>
        /// <param name="onEquip">点击装备时回调（仅 <paramref name="isEquipped"/> = false 时使用）。</param>
        /// <param name="onUnequip">点击卸下时回调（仅 <paramref name="isEquipped"/> = true 时使用）。</param>
        public void Bind(CharmSO charm,
                         bool isEquipped,
                         Action<CharmSO> onEquip,
                         Action<CharmSO> onUnequip)
        {
            if (charm == null) return;

            // ── 图标 ────────────────────────────────────────────────────────
            if (_icon != null)
            {
                _icon.sprite  = charm.icon;
                _icon.enabled = charm.icon != null;
            }
            if (_iconRoot != null) _iconRoot.SetActive(charm.icon != null);

            // ── 文本（本地化容错：未找到键时回落到 charmId / 空字符串）──────
            if (_nameText != null)
            {
                string loc = LocalizationManager.Get(charm.displayNameKey, LocalizationTable.Items);
                _nameText.text = !string.IsNullOrEmpty(loc) && loc != charm.displayNameKey
                    ? loc : charm.charmId;
            }
            if (_notchCostText != null)
                _notchCostText.text = charm.notchCost.ToString();

            if (_descriptionText != null)
            {
                string loc = LocalizationManager.Get(charm.descriptionKey, LocalizationTable.Items);
                _descriptionText.text = !string.IsNullOrEmpty(loc) && loc != charm.descriptionKey
                    ? loc : string.Empty;
            }
            if (_equipBadgeText != null)
                _equipBadgeText.text = isEquipped ? "✓" : string.Empty;

            // ── 按钮 ────────────────────────────────────────────────────────
            if (_actionButton != null)
            {
                _actionButton.onClick.RemoveAllListeners();
                var captured = charm;
                if (isEquipped)
                {
                    if (onUnequip != null)
                        _actionButton.onClick.AddListener(() => onUnequip(captured));
                }
                else
                {
                    if (onEquip != null)
                        _actionButton.onClick.AddListener(() => onEquip(captured));
                }
            }
        }
    }
}