using CharacterSystem;
using System;
using UnityEngine;
using UnityEngine.Serialization;

public class TurnManager : MonoBehaviour
{
    [Header("Players")]
    [SerializeField, FormerlySerializedAs("player1")] private Player _player1;
    [SerializeField, FormerlySerializedAs("player2")] private Player _player2;
    [SerializeField, FormerlySerializedAs("bot")] private Bot _bot;

    [Header("Settings")]
    [SerializeField, FormerlySerializedAs("gameMode")] private GameMode _gameMode;

    private IGamePlayer _currentPlayer;
    private bool _isGameOver;

    public void StartGame(GameMode mode)
    {
        _gameMode = mode;
        _isGameOver = false;
        SetupPlayers();
        StartTurn(_currentPlayer);
    }

    public void CancelPlayerPreparation()
    {
        _player1.OnMoveCommitted -= OnPlayerMoveCommitted;
        _player1.OnThinkingStarted -= OnPlayerThinkingStarted;
        _player1.OnChipDropped -= OnTurnCompleted;
        _player1.ReturnPreparedChipToPool();
    }

    private void SetupPlayers()
        => _currentPlayer = _player1;

    private void StartTurn(IGamePlayer player)
    {
        if (_isGameOver)
            return;

        bool isPlayerOneTurn = player == _player1;

        if (isPlayerOneTurn)
        {
            _player1.OnMoveCommitted -= OnPlayerMoveCommitted;
            _player1.OnMoveCommitted += OnPlayerMoveCommitted;

            _player1.OnThinkingStarted -= OnPlayerThinkingStarted;
            _player1.OnThinkingStarted += OnPlayerThinkingStarted;
        }

        if (_gameMode == GameMode.pve)
        {
            GameManager.Instance.turnTracker.EnableTimer(false);
        }

        player.OnChipDropped -= OnTurnCompleted;
        player.OnChipDropped += OnTurnCompleted;
        player.PrepareChip();
        ControlsPerformer.Instance.SetControlable(player);
        _currentPlayer = player;
    }

    private void OnTurnCompleted(int column, int row)
    {
        IGamePlayer completedPlayer = _currentPlayer;
        completedPlayer.OnChipDropped -= OnTurnCompleted;

        if (_gameMode == GameMode.pve && completedPlayer == _player1)
            EventBus.TriggerEvent(GameEvent.PlayerTurn);

        if (CheckGameOver(column, row))
        {
            OnGameOver();
            return;
        }

        NextTurn();
    }

    private void NextTurn()
    {
        _currentPlayer.Sleep();

        if (_gameMode == GameMode.pve)
            _currentPlayer = _currentPlayer == _player1 ? (IGamePlayer)_bot : _player1;
        else
            _currentPlayer = _currentPlayer == _player1 ? (IGamePlayer)_player2 : _player1;

        StartTurn(_currentPlayer);

        if (_gameMode == GameMode.pve && _currentPlayer == _bot)
            EventBus.TriggerEvent(GameEvent.BotTurn);
    }

    private bool CheckGameOver(int column, int row)
    {
        if (_currentPlayer is BasePlayer player)
        {
            CheckResult checkResult = FieldChecker.Check(player.team, row, column);
            return checkResult.End;
        }

        throw new Exception($"Не удалось привести {_currentPlayer}");
    }

    private void OnGameOver()
    {
        _isGameOver = true;
        _currentPlayer.Sleep();
        ControlsPerformer.Instance.SetControlable(null);

        Team lastPlayerTeam = ((BasePlayer)_currentPlayer).team;
        CheckResult result = FieldChecker.lastResult;
        GameManager.Instance.endGameHandler.HandleEndGame(lastPlayerTeam, _gameMode, result);
    }

    private void OnPlayerMoveCommitted()
    {
        _player1.OnMoveCommitted -= OnPlayerMoveCommitted;
        GameManager.Instance.DisableEarlyMenuExit();

        if (_gameMode == GameMode.pve)
        {
            GameManager.Instance.turnTracker.EnableTimer(false);
            GameManager.Instance.turnTracker.IncrementMoves();
        }
    }

    private void OnPlayerThinkingStarted()
    {
        _player1.OnThinkingStarted -= OnPlayerThinkingStarted;
        GameManager.Instance.EnableEarlyMenuExit();

        if (_gameMode == GameMode.pve)
            GameManager.Instance.turnTracker.EnableTimer(true);
    }
}