using System;
using UnityEngine;

namespace GameFramework
{
    /// <summary>
    /// 全局游戏状态管理器（持久化单例）。
    /// 维护 GameState，提供 GameOver 触发入口与 onGameOver 事件。
    /// </summary>
    public class GameManager : PersistentSingleton<GameManager>
    {
        /// <summary>游戏结束时触发（GameOverScreen 等订阅）。</summary>
        public static Action onGameOver;

        public static GameState GameState
        {
            get => Instance.gameState;
            set => Instance.gameState = value;
        }

        [SerializeField] private GameState gameState = GameState.Playing;

        /// <summary>触发游戏结束：设状态 + 触发事件。玩家被敌人抓到时调用。</summary>
        public static void GameOver()
        {
            if (Instance == null) return;
            GameState = GameState.GameOver;
            onGameOver?.Invoke();
        }
    }

    public enum GameState
    {
        Playing,
        Paused,
        GameOver,
        Scoring
    }
}