using Assets.Scripts;
using System;
using System.Collections;
using Unity.VisualScripting;
using UnityEditor.Rendering;
using UnityEngine;
using static PlayersHandler;

/// <summary>
/// GameHandler gère le fonctionnement général d'une partie de jeu. Il se charge de faire apparaître les joueurs
/// </summary>
public class GameHandler : SingletonMB<GameHandler>
{



#region PROPERTIES

    int Seed
    {
        get { return _seed; }
        set
        {
            _seed = value;
            UnityEngine.Random.InitState(value);
        }
    } private int _seed;
    public float FrameDistance { get; private set; }
    public float TotalDistance { get; private set; }
    [SerializeField] public float MapSpeed { get; private set; }
    public Attempt CurrentAttempt { get; private set; }
    public bool MaxDifficultyReached { get; private set; }
    public bool IsPaused { get; private set; } = false;
    public bool HaveHumanPlayer { get; private set; } = false;
    public bool AttemptEnding { get; private set; }
    public int TickAttemptDuration { get; private set; }
    public float TimeAttemptDuration {get; private set;}

    #endregion
#region VARIABLES
    private const float DIFFICULTY_DAMP = 0.01f;
    [SerializeField] private GameObject finishLine;
    private ScoreHandler _scoreHandler;
    private LevelSpawner _levelSpawner;
    private PlayersHandler _playerHandler;
    private DataBearer _dataBearer;    
    private TileSpawner _tileSpawner;

    private Vector3 playerSpawnPosition = new Vector3(-3, 0, 0);

    private float maxSpeed;
    private float maxDistance;
    private bool raiseScoreOnDistance;
    private float difficultyMultiplier;

    private bool finishLineSpawned;

    private short tickCounter;


#endregion
#region EVENTS

    public event EventHandler<AttemptEventArgs> OnAttemptStarted;
    public event EventHandler<AttemptEventArgs> OnAttemptEnding;
    public event EventHandler<AttemptEventArgs> OnAttemptEnded;
    public event EventHandler<EventArgs> OnGamePaused;
    public event EventHandler<EventArgs> OnGameResumed;
    public event EventHandler<EventArgs> OnInstanciatingPlayers;

    public class AttemptEventArgs : EventArgs
    {
        public Attempt attempt;
        public AttemptEventArgs(Attempt attempt) { this.attempt = attempt; }
    }

    public void HaltAttempt_OnAllPlayersFinished(object sender, EventArgs agrs)
    {
        HaltAttempt("Tous les joueurs sont Out");
    }

    public void CheckIfHumanPlayer_OnPlayerInstanciated(object sender, PlayerEventArgs args)
    {
        if (args.player.IsHuman)
        {
            HaveHumanPlayer = true;
        }
    }

#endregion
#region METHODS

    /// <summary>
    /// Return a seed which depend on selected settings and attempt number
    /// </summary>
    private int SetSeed()
    {
        int seed;
        if (_dataBearer.Session.Rules.ChangeSeedEachTry & CurrentAttempt.AttemptNumber > 1) //Get a random seed each new try
        {
            seed = UnityEngine.Random.Range(100000000, 1000000000); //generate a random 9 digits seed
        }
        else //Get either default seed or custom seed
        {
            seed = _dataBearer.Session.Rules.UsesDefaultSeed
                ? PlayerPrefs.GetInt(Settings.DefaultSeedSettingValue)
                : PlayerPrefs.GetInt(Settings.CustomSeedSettingValue);
        }
        return seed;
    }

    private void RaiseScore()
    {
        float scoreToAdd = FrameDistance;// * Time.deltaTime;
        _scoreHandler.AddScoreToAllAlivePlayers(scoreToAdd);
    }
    private void RaiseDifficulty()
    {
        if(MapSpeed > maxSpeed)
        {
            MapSpeed = maxSpeed;
            MaxDifficultyReached = true;
        }
        MapSpeed += MapSpeed * difficultyMultiplier * Time.deltaTime;
    }

    private void SpawnPlayers()
    {
        if (_dataBearer.Session.Players.Human)
            _playerHandler.InstanciatePlayer<HumanPlayerBehaviour>(playerSpawnPosition);
        if (_dataBearer.Session.Players.OmnicientBot)
            _playerHandler.InstanciatePlayer<OmnicientBehaviour>(playerSpawnPosition);
        if (_dataBearer.Session.Players.ObserverBot)
            _playerHandler.InstanciatePlayer<ObserverBehaviour>(playerSpawnPosition);
        if (_dataBearer.Session.Players.IteratorBot)
            _playerHandler.InstanciatePlayer<IteratorBehaviour>(playerSpawnPosition);
    }

    #endregion
#region ENDPOINTS

    public void PauseGame()
    {
        if (!IsPaused)
        {
            StartCoroutine(PauseGameCoroutine());
            
        }
    }

    private IEnumerator PauseGameCoroutine()
    {
        yield return null;
        Time.timeScale = 0; // Met le jeu en pause
        IsPaused = true;
        OnGamePaused.Invoke(this, new EventArgs());
    }

    public void ResumeGame()
    {
        if (IsPaused)
        {
            Time.timeScale = _dataBearer.Rules.RushMode ? 15 : 1; // Reprend le jeu
            IsPaused = false;
            OnGameResumed.Invoke(this, new EventArgs());
        }
    }

    public void InitAttempt()
    {
        TimeAttemptDuration = 0;
        TickAttemptDuration = 0;
        Debug.LogWarning("Initate Attempt !");
        AttemptEnding = false;

        CurrentAttempt = new Attempt();
        CurrentAttempt.AttemptNumber = _dataBearer.Session.Attempts.Count + 1;
        Seed = SetSeed();
        CurrentAttempt.Seed = Seed;

        TotalDistance = 0;
        MapSpeed = _dataBearer.Rules.StartSpeed;
        raiseScoreOnDistance = _dataBearer.Rules.ScoreOnDistance;
        maxSpeed = _dataBearer.Rules.MaxSpeed;
        difficultyMultiplier = _dataBearer.Rules.DifficultyMultiplier * DIFFICULTY_DAMP;
        if(_dataBearer.Rules.RushMode){
            Time.timeScale =  15;
            foreach (var renderer in FindObjectsOfType<Renderer>())
                {
                    if(renderer.gameObject.GetComponent<ScorePannelScript>()==null)
                        {renderer.enabled = false;}
                }
        }
        else{
            Time.timeScale =  1;
        }
        

        MaxDifficultyReached = false;
        TotalDistance = 0;
        FrameDistance = 0;

        finishLineSpawned = false;
        tickCounter = 0;
        SpawnPlayers();
        _scoreHandler.AddScoreToAllAlivePlayers(500);
        OnAttemptStarted?.Invoke(this, new AttemptEventArgs(CurrentAttempt));
    }

    /// <summary>
    /// Halt the current attempt
    /// </summary>
    public void HaltAttempt(string message)
    {
        Console.WriteLine(message);
        AttemptEnding = true;
        OnAttemptEnding?.Invoke(this, new AttemptEventArgs(CurrentAttempt));
        OnAttemptEnded?.Invoke(this, new AttemptEventArgs(CurrentAttempt));
    }

#endregion
#region LIFECYCLE
    protected override void Awake()
    {
        base.Awake();

        _scoreHandler = ScoreHandler.Instance;
        _levelSpawner = LevelSpawner.Instance;
        _playerHandler = PlayersHandler.Instance;
        _dataBearer = DataBearer.Instance;
        _tileSpawner = TileSpawner.Instance;


        _playerHandler.OnAllPlayersFinished += HaltAttempt_OnAllPlayersFinished;
        _playerHandler.OnPlayerInstanciated += CheckIfHumanPlayer_OnPlayerInstanciated;

        difficultyMultiplier = _dataBearer.Rules.DifficultyMultiplier;
        raiseScoreOnDistance = _dataBearer.Rules.ScoreOnDistance;
        maxDistance = _dataBearer.Rules.MaxDistance;
        
    }


    void Update()
    {
        FrameDistance = MapSpeed * Time.deltaTime;
        TotalDistance += FrameDistance;
        TimeAttemptDuration += Time.deltaTime;
        TickAttemptDuration += 1;
        tickCounter += 1;

        if (tickCounter > 1000)
        {
            //Debug.Log("1000 TICK " + TimeAttemptDuration);
            tickCounter = 0;
            _dataBearer.RecordPlayersScore();
        }

 
        if(maxDistance != 0 && TotalDistance > maxDistance)
        {
            HaltAttempt("Ligne d'arrivée atteinte");
        }

        if (raiseScoreOnDistance) RaiseScore();
        if (!MaxDifficultyReached) RaiseDifficulty();

        if(maxDistance != 0 && !finishLineSpawned && maxDistance-TotalDistance < 20)
         {
            Instantiate(finishLine, new Vector3(maxDistance - TotalDistance - 3, 0, -1), finishLine.transform.rotation);
            finishLineSpawned = true;
        }


        if (Input.GetKeyDown(KeyCode.Escape))
            (IsPaused ? (Action)ResumeGame : PauseGame)();
    }

    private void OnDestroy()
    {
        Clean();
    }
    private void OnDisable()
    {
        Clean();
    }


    private void Clean()
    {
        /*StopAllCoroutines();
        _playerHandler.OnAllPlayersFinished -= HaltAttempt_OnAllPlayersFinished;
        _playerHandler.OnPlayerInstanciated -= CheckIfHumanPlayer_OnPlayerInstanciated;*/
    }
    #endregion

}