using System;
using UnityEngine;

public enum GameState
{
    Editing,
    Gameplay
}

public class GameManager : MonoBehaviour
{
    // Static
    private static GameManager instance;
    
    // Events
    public event GameStateChangedHandler GameStateChanged;
    public delegate void GameStateChangedHandler(GameState newState);

    // Public
    public GameState currentState { get; private set; } = GameState.Editing;

    // Properties
    public static GameManager Instance => instance;


    // Methods
    private void Awake()
    {
        if (instance != null && instance != this)
        {
            Destroy(gameObject);
            return;
        }
        instance = this;
    }


    // Used by button OnClick
    public void SetPlayState()
    {
        SetState(GameState.Gameplay);
    }


    // Use by button OnClick
    public void SetEditState()
    {
        SetState(GameState.Editing);
    }


    public void SetState(GameState newState)
    {
        currentState = newState;

        GameStateChanged?.Invoke(currentState);
    }
}