using System.Collections.Generic;
using UnityEngine;
using UnityEngine.Events;
using TMPro;

namespace BaseGames.UI
{
    /// <summary>
    /// 下拉控件封装：TMP_Dropdown + 一行式 <see cref="Bind"/>（填充选项 / 设当前项 / 接回调），
    /// 消除设置面板里重复的 ClearOptions/AddOptions/RefreshShownValue 样板。
    /// 选项文本可由调用方先经本地化（<c>LocalizationManager.Get</c>）解析后传入。
    /// </summary>
    [DisallowMultipleComponent]
    public class UIDropdown : MonoBehaviour
    {
        [SerializeField] private TMP_Dropdown _dropdown;

        public TMP_Dropdown Dropdown => _dropdown;
        public int Value => _dropdown != null ? _dropdown.value : 0;

        /// <summary>填充选项、设当前选中项并接变更回调。</summary>
        public void Bind(IEnumerable<string> options, int index, UnityAction<int> onChanged)
        {
            if (_dropdown == null) return;
            _dropdown.onValueChanged.RemoveAllListeners();
            _dropdown.ClearOptions();

            var list = options as List<string> ?? new List<string>(options);
            _dropdown.AddOptions(list);
            _dropdown.value = Mathf.Clamp(index, 0, Mathf.Max(0, list.Count - 1));
            _dropdown.RefreshShownValue();

            _dropdown.onValueChanged.AddListener(i => onChanged?.Invoke(i));
        }

        /// <summary>不触发回调地设置当前选中项（用于外部状态同步）。</summary>
        public void SetIndexSilent(int index)
        {
            if (_dropdown == null) return;
            _dropdown.SetValueWithoutNotify(Mathf.Clamp(index, 0, Mathf.Max(0, _dropdown.options.Count - 1)));
            _dropdown.RefreshShownValue();
        }
    }
}