using UnityEngine;
using UnityEngine.UI;
using BaseGames.Input;

namespace BaseGames.UI.Settings
{
    /// <summary>
    /// 按键重绑定面板（架构 04_InputModule §6）。
    /// 统一管理所有 RebindActionRow；协调"同时只有一行处于重绑定状态"的排他锁；
    /// 提供"重置全部"按钮；绑定完成后自动持久化。
    /// 挂载路径：Canvas_Overlay → SettingsPanel → KeybindingTab → RebindPanel
    /// </summary>
    public class RebindPanel : MonoBehaviour
    {
        [SerializeField] private InputReaderSO     _inputReader;
        [SerializeField] private RebindActionRow[] _rows;            // Inspector 配置，顺序对应 UI 布局
        [SerializeField] private Button            _resetAllButton;
        [SerializeField] private ConflictDetector  _conflictDetector;

        // ── 生命周期 ──────────────────────────────────────────────────────

        private void Awake()
        {
            _resetAllButton?.onClick.AddListener(OnResetAll);

            if (_rows == null) return;
            foreach (var row in _rows)
                row.Initialize(_inputReader, _conflictDetector, OnRebindRequested);
        }

        // ── 供 RebindActionRow 反查行列表 ─────────────────────────────────

        /// <summary>返回此面板管理的所有行（供 RebindActionRow 刷新冲突高亮时遍历）。</summary>
        public RebindActionRow[] GetRows() => _rows;

        // ── 内部逻辑 ──────────────────────────────────────────────────────

        /// <summary>由 RebindActionRow 点击时回调；实现排他锁（同时只允许一行重绑定）。</summary>
        private void OnRebindRequested(RebindActionRow requestingRow)
        {
            // 禁用其他所有行，防止并发重绑定操作
            if (_rows != null)
                foreach (var row in _rows)
                    row.SetInteractable(row == requestingRow);

            requestingRow.StartRebind(onFinished: () =>
            {
                // 重绑定完成（或取消）→ 恢复所有行可交互 → 持久化
                if (_rows != null)
                    foreach (var row in _rows)
                        row.SetInteractable(true);

                _inputReader?.SaveBindingOverrides();
            });
        }

        /// <summary>"重置全部"按钮回调：恢复默认绑定并刷新所有行显示。</summary>
        private void OnResetAll()
        {
            _inputReader?.ResetBindings();

            if (_rows != null)
                foreach (var row in _rows)
                    row.RefreshDisplay();
        }
    }
}