using System;
using UnityEngine;

public class GameManager : MonoBehaviour
{
    public static GameManager Instance { get; private set; }

    [SerializeField] private bool _debugMode = false;

    private bool _hasKey = false;
    private int _treasureCount = 0;

    public bool HasKey => _hasKey;
    public int TreasureCount => _treasureCount;

    public event EventHandler<bool> OnKeyStateChanged;
    public event EventHandler<int> OnTreasureCountChanged;
    public event EventHandler OnLevelComplete;

    private void Awake()
    {
        // Singleton pattern
        if (Instance != null && Instance != this)
        {
            Destroy(gameObject);
            return;
        }

        Instance = this;
        DontDestroyOnLoad(gameObject);
    }

    public void SetKeyState(bool hasKey)
    {
        if (_hasKey == hasKey)
            return;

        _hasKey = hasKey;
        OnKeyStateChanged?.Invoke(this, _hasKey);

        if (_debugMode)
            Debug.Log($"[GameManager] Key state changed: {_hasKey}");
    }

    public void AddTreasure(int amount = 1)
    {
        _treasureCount += amount;
        OnTreasureCountChanged?.Invoke(this, _treasureCount);

        if (_debugMode)
            Debug.Log($"[GameManager] Treasure count: {_treasureCount}");
    }

    public void CompletLevel()
    {
        if (_debugMode)
            Debug.Log("[GameManager] Level completed!");

        OnLevelComplete?.Invoke(this, EventArgs.Empty);
    }

    public void Reset()
    {
        _hasKey = false;
        _treasureCount = 0;

        if (_debugMode)
            Debug.Log("[GameManager] Reset");
    }
}