using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.Events;
using UnityEngine.SceneManagement;
using UnityEngine.UI;


public enum GameState
{
    None,
    Started,
    Ended,
}

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

    private EnergyController _energyController;
    private vTimerCounter _timerCounter;
    private EndGameModule _endGameModule;

    private bool _successEnd;

    public UnityEvent OnGameStarted;
    public UnityEvent OnGameEnded;

    public GameState CurrentGameState = GameState.None;


    private void Awake()
    {
        if (!Instance)
        {
            Instance = this;
        }
        else
        {
            Destroy(gameObject);
            return;
        }

        InitReferences();
    }

    private void OnEnable()
    {
        _timerCounter.OnTimeEnded.AddListener(OnEndTime);
    }

    private void OnDisable()
    {
        _timerCounter.OnTimeEnded.AddListener(OnEndTime);
    }

    private void InitReferences()
    {
        _endGameModule = FindObjectOfType<EndGameModule>();
        _timerCounter = FindObjectOfType<vTimerCounter>();
    }

    public void ChangeState(GameState newState)
    {
        if (CurrentGameState == newState)
            return;

        CurrentGameState = newState;

        Debug.Log(newState);

        switch (CurrentGameState)
        {
            case GameState.Started:
                {
                    PlayerSetup.Instance.CreateNewPlayer();

                    OnGameStarted?.Invoke();
                }
                break;
            case GameState.Ended:
                {
                    OnGameEnded?.Invoke();
                    _endGameModule.ShowEndMenu(_successEnd);
                }
                break;
        }
    }

    private bool _startedOnce = false;

    [ContextMenu("Debug Start")]
    public void OnStartGame()
    {
        if (_startedOnce)
            return;

        _startedOnce = true;
        ChangeState(GameState.Started);
    }

    [ContextMenu("Debug End")]
    public void OnEndTime()
    {
        _successEnd = false;
        ChangeState(GameState.Ended);
    }

    [ContextMenu("Debug Finish")]
    public void OnFinish()
    {
        _successEnd = true;
        ChangeState(GameState.Ended);
    }
}