139 lines
4.8 KiB
C#
139 lines
4.8 KiB
C#
using System;
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using System.Collections.Generic;
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using UnityEngine;
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using GameFramework;
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namespace IndianOceanAssets.Engine2_5D
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{
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/// <summary>
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/// 灵灯系统 —— 挂在玩家物体上。
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/// 按 U 键在玩家当前位置放置灵灯，灵灯照亮周围区域，
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/// 怪物碰触灵灯会被扣 1 点血，灵灯消失并被回收。
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/// 灵灯有存在时间，超时后自动回收。
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/// </summary>
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public class SpiritLanternSystem : MonoBehaviour
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{
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[Header("灵灯数量")]
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[Tooltip("最大可持有灵灯数量")]
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[SerializeField] private int maxLanterns = 5;
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[Header("按键")]
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[SerializeField] private KeyCode lanternKey = KeyCode.U;
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[Header("冷却")]
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[Tooltip("放置灵灯的冷却时间（秒）")]
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[SerializeField] private float cooldown = 5f;
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[Header("灵灯预制体")]
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[SerializeField] private GameObject lanternPrefab;
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private int _remainingLanterns;
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private float _lastPlaceTime = -999f;
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/// <summary>跟踪所有已放置的灵灯，用于回收时取消事件订阅，防止内存泄漏</summary>
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private readonly List<SpiritLantern> _activeLanterns = new List<SpiritLantern>();
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/// <summary>当前可释放的灵灯数量（供 UI 使用）</summary>
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public int RemainingLanterns => _remainingLanterns;
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/// <summary>冷却是否就绪</summary>
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public bool IsCooldownReady => Time.time > _lastPlaceTime + cooldown;
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/// <summary>冷却剩余时间（供 UI 使用）</summary>
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public float CooldownRemaining => Mathf.Max(0f, (_lastPlaceTime + cooldown) - Time.time);
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private void Start()
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{
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_remainingLanterns = maxLanterns;
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}
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private void Update()
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{
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// 按 U 且 CD 就绪 且 还有灵灯 → 放置
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if (Input.GetKeyDown(lanternKey)
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&& _remainingLanterns > 0
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&& Time.time > _lastPlaceTime + cooldown
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&& lanternPrefab != null)
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{
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PlaceLantern();
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}
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}
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/// <summary>
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/// 在玩家当前位置放置一个灵灯。
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/// </summary>
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private void PlaceLantern()
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{
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_remainingLanterns--;
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_lastPlaceTime = Time.time;
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// 播放灵灯放置音效
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if (AudioManager.Instance != null)
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AudioManager.Instance.PlaySFXFromResources("SFX/Lantern", 0.8f);
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// 在玩家位置实例化灵灯
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GameObject lanternObj = Instantiate(lanternPrefab, transform.position, Quaternion.identity);
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SpiritLantern lantern = lanternObj.GetComponent<SpiritLantern>();
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if (lantern != null)
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{
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// 设置所有者引用，用于回收时取消事件订阅
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lantern.SetOwner(this);
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// 订阅灵灯回收事件，并跟踪该灵灯
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lantern.OnLanternRecalled += OnLanternRecalled;
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_activeLanterns.Add(lantern);
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}
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}
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/// <summary>
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/// 灵灯被回收时调用（怪物碰触或超时）。
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/// 清理已销毁的灵灯引用，防止内存泄漏。
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/// </summary>
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private void OnLanternRecalled()
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{
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// 清理列表中已销毁的灵灯引用
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_activeLanterns.RemoveAll(l => l == null);
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_remainingLanterns = Mathf.Min(_remainingLanterns + 1, maxLanterns);
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}
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/// <summary>
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/// 显式取消订阅指定灵灯的事件并从跟踪列表移除。
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/// 由 SpiritLantern 在销毁前调用，确保事件订阅被正确释放。
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/// </summary>
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public void UnregisterLantern(SpiritLantern lantern)
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{
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if (lantern != null)
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{
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lantern.OnLanternRecalled -= OnLanternRecalled;
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_activeLanterns.Remove(lantern);
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}
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}
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/// <summary>
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/// 安全网：玩家销毁或场景卸载时，清理所有灵灯的事件订阅。
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/// </summary>
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private void OnDestroy()
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{
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foreach (var lantern in _activeLanterns)
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{
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if (lantern != null)
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lantern.OnLanternRecalled -= OnLanternRecalled;
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}
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_activeLanterns.Clear();
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}
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// ===== 编辑器可视化 =====
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private void OnDrawGizmosSelected()
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{
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// 绘制冷却指示
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if (Time.time < _lastPlaceTime + cooldown)
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{
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float remaining = (_lastPlaceTime + cooldown) - Time.time;
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float ratio = remaining / cooldown;
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Gizmos.color = new Color(1f, 0.6f, 0f, 0.3f);
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Gizmos.DrawWireSphere(transform.position, 1f * ratio);
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}
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}
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}
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}
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