using UnityEngine;
using BaseGames.Core;
using BaseGames.Core.Events;
using BaseGames.World;

namespace BaseGames.Challenge
{
    /// <summary>
    /// 挑战房间入口触发物（架构 22_QuestChallengeModule §13）。
    /// 实现 IInteractable，玩家交互后通过事件频道触发挑战场景加载。
    /// ⚠️ SceneLoader 无 Instance；通过 EVT_SceneLoadRequest 频道触发加载（架构 03 §3）。
    /// </summary>
    [RequireComponent(typeof(Collider2D))]
    public class ChallengeRoomTrigger : MonoBehaviour, IInteractable
    {
        [SerializeField] private ChallengeRoomSO                   _challengeData;
        [SerializeField] private string                            _challengeSceneName;
        [SerializeField] private SceneLoadRequestEventChannelSO    _onSceneLoadRequest;  // EVT_SceneLoadRequest

        // ── IInteractable ──────────────────────────────────────────────────
        public string InteractPrompt => _challengeData != null
            ? $"进入挑战：{_challengeData.displayName}"
            : "进入挑战";
        public bool CanInteract => IsUnlocked();

        public void Interact(Transform player)
        {
            if (!IsUnlocked()) return;
            _onSceneLoadRequest?.Raise(new SceneLoadRequest
            {
                SceneName         = _challengeSceneName,
                EntryTransitionId = string.Empty,
                ShowLoadingScreen = false,
                IsRespawn         = false,
            });
        }

        public void OnPlayerEnterRange(Transform player) { }
        public void OnPlayerExitRange() { }

        // ── 私有 ─────────────────────────────────────────────────────────

        private bool IsUnlocked()
        {
            if (_challengeData?.prerequisiteBossIds == null) return true;
            var sm = ServiceLocator.GetOrDefault<ISaveService>();
            if (sm == null) return false;
            foreach (var bossId in _challengeData.prerequisiteBossIds)
                if (!sm.IsBossDefeated(bossId)) return false;
            return true;
        }
    }
}