using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using System;

public class AI_Input : MonoBehaviour
{
    public BotState botState = BotState.Patrol;
    public Vector2 leftInput, rightInput;

    public float agressiveTime = 5f;
    public float attackTime = 2f;
    public float updateBehaviourIn = 1f;
    public float neutralCapDistance = 20f;
    public float detectPlayerDistance = 4f;
    public Action OnTouchDown, OnTouchUp;
    public Action OnCurrentPathFinished, OnAttack;    
    public PlayerState _currentEnemy;

    public List<TileInfo> _currentFollowingPath;    

    private PlayerState _playerState;
    private TileMovement _tileMovement;    
    private PlayerActionManager _actionManager;
    private CaptureController _captureController;

    private IEnumerator _attackCoroutine;

    private Vector3 _startBotPoint;

    private void Awake()
    {
        _playerState = GetComponent<PlayerState>();
        _tileMovement = GetComponent<TileMovement>();
        _actionManager = GetComponent<PlayerActionManager>();
        _captureController = GetComponent<CaptureController>();

        _actionManager.OnActionSuccess += BackToPatrol;
        _actionManager.OnActionStart += OnActionStart;
        
        //_tileMovement.OnFinishMovement += CheckState;
        _tileMovement.OnStartMovement += StopJoystick;
        _playerState.OnInitializied += StartPatrolBehaviour;

        OnCurrentPathFinished += StartPatrolBehaviour;

        _playerState.OnDeath += StopAllActions;

        //_captureController.OnCaptureEnd += SetNewTarget;

        _startBotPoint = transform.position;
        //Debug.Log(_startBotPoint);

    }

    /*private void SetNewTarget(TileInfo tile, float capTime)
    {
        StartPatrolBehaviour();
    }*/

    private void StopAllActions()
    {
        StopAllCoroutines();
        CancelInvoke();
    }

    private void Start()
    {
       
    }

    private IEnumerator CheckBotState(float updateTime)
    {
        yield return new WaitForSeconds(UnityEngine.Random.Range(0.5f, 1f));

        while (true)
        {
            CheckState();
            yield return new WaitForSeconds(updateTime);
        }
    }

    private void OnEnable()
    {
        //Debug.Log("bot " + gameObject.name + " started");
        //InvokeRepeating("CheckState", UnityEngine.Random.Range(0.5f, 1f), updateBehaviourIn); //to make not the same start
        StartCoroutine(CheckBotState(updateBehaviourIn));
    }

    private void OnActionStart(ActionType arg1, CharacterState arg2)
    {
        _currentEnemy = null;
    }

    private void BackToPatrol()
    {
        Debug.Log("attack ended");
        StopCoroutine(_attackCoroutine);
        StartPatrolBehaviour();
        //StartCoroutine(CheckBotState(updateBehaviourIn));
    }
    

    private void StopJoystick(ActionType arg1, CharacterState arg2)
    {
        leftInput = Vector2.zero;
    }

    private void MoveTo(TileInfo tile)
    {
        if (_currentFollowingPath.Count > 0)
        {
            leftInput = TileManagment.GetDirection(_playerState.currentTile, tile);
        }
    }

    private void StartPatrolBehaviour()
    {
        _currentEnemy = null;
        botState = BotState.Patrol;
        //TileInfo targetTile = TileManagment.GetRandomOtherTile(_playerState.ownerIndex);        
        TileInfo targetTile = TileManagment.GetNearestOtherTile(_playerState.currentTile, _playerState.ownerIndex, neutralCapDistance, _startBotPoint);        
        var startTile = _playerState.currentTile;
        _currentFollowingPath = Pathfinding.FindPath(startTile, targetTile, TileManagment.levelTiles, TileManagment.tileOffset);
        if (_currentFollowingPath == null)
        {
            StartPatrolBehaviour();
            return;
        }
        //MoveTo(_currentFollowingPath[1]);        
    }   

    private void CheckState(/*ActionType newType, CharacterState newState*/)
    {
        //Debug.Log("Check state");
        if (_playerState.currentState == CharacterState.Dead)
            return;
        foreach (PlayerState enemy in _playerState.enemies)
        {
            
            if (Vector3.Distance(enemy.transform.position, transform.position) <= TileManagment.tileOffset*1.1f)
            {
                //Debug.Log("attack state");
                botState = BotState.Attack;
                _currentEnemy = enemy;
                break;
            }            
        }
        if (botState == BotState.Patrol)
        {
            foreach (PlayerState enemy in _playerState.enemies)
            {                
                foreach (TileInfo tile in TileManagment.charTiles[(int)_playerState.ownerIndex])
                {
                    if ((enemy.transform.position - tile.tilePosition).magnitude < Mathf.Epsilon)
                    {
                        botState = BotState.Agressive;
                        _currentEnemy = enemy;
                        StartCoroutine(CalmDown(agressiveTime));
                        //Debug.Log("aggressive state");
                    }
                    else if ((enemy.transform.position - transform.position).magnitude < detectPlayerDistance)
                    {
                        botState = BotState.Agressive;
                        _currentEnemy = enemy;
                        StartCoroutine(CalmDown(agressiveTime));
                        //Debug.Log("aggressive state");
                    }
                }
                if (_currentEnemy != null)
                {
                    break;
                }
            }
        }

        SetBehaviour(botState);
        
    }

    private void SetBehaviour(BotState state)
    {
        switch (state)
        {
            case BotState.Patrol:
                MoveToNextPoint();
                break;
            case BotState.Agressive:
                MoveToEnemy(_currentEnemy);
                break;
            case BotState.Attack:
                AttackEnemy(_currentEnemy);
                break;
        }
    }

    private void AttackEnemy(PlayerState currentEnemy)
    {
        //Debug.Log("attacking");
        leftInput = Vector2.zero;
        _currentFollowingPath.Clear();
        _attackCoroutine = TryToAttack(0.2f);
        StartCoroutine(_attackCoroutine);        
    }

    private void MoveToEnemy(PlayerState currentEnemy)
    {
        List<TileInfo> allAdjacentTilesToTarget = TileManagment.GetAllAdjacentTiles(currentEnemy.currentTile);
        TileInfo adjacentTarget = allAdjacentTilesToTarget[0];
        foreach (var tile in allAdjacentTilesToTarget)
        {
            if (tile.canMove)
            {
                adjacentTarget = tile;
                break;
            }
        }
        TileInfo currentPos = TileManagment.GetTile(transform.position);
        //Debug.Log(adjacentTarget);
        RecalculatePath(currentPos, adjacentTarget);
        if (_currentFollowingPath == null)
        {
            StartPatrolBehaviour();
            return;
        }
        MoveToNextPoint();
    }

    private void RecalculatePath(TileInfo curentPos, TileInfo target)
    {
        _currentFollowingPath.Clear();
        _currentFollowingPath = Pathfinding.FindPath(curentPos, target, TileManagment.levelTiles, TileManagment.tileOffset);        
    }

    private void MoveToNextPoint()
    {
        Debug.Log("try to move next point");
        if (_currentFollowingPath != null) //when stop movement, calculating path that begins from target tile
        {
            if (_playerState.currentTile.tileOwnerIndex == _playerState.ownerIndex)
            {
                if (_playerState.currentTile == _currentFollowingPath[_currentFollowingPath.Count - 1])
                {
                    OnCurrentPathFinished?.Invoke();
                    return;
                }

                var endTile = _currentFollowingPath[_currentFollowingPath.Count - 1];
                if (!endTile.canMove)
                {
                    endTile = TileManagment.GetNearestOtherTile(_playerState.currentTile, _playerState.ownerIndex, neutralCapDistance, _startBotPoint);
                    //endTile = TileManagment.GetRandomOtherTile(_playerState.ownerIndex);
                    //Debug.Log("changed target");
                }
                var currentTile = _playerState.currentTile;
                _currentFollowingPath.Clear();
                _currentFollowingPath = Pathfinding.FindPath(currentTile, endTile, TileManagment.levelTiles, TileManagment.tileOffset);
                MoveTo(_currentFollowingPath[1]);
                Debug.Log("moving");
            }

        }
        else if (_playerState.currentTile.tileOwnerIndex == _playerState.ownerIndex)
        {
            OnCurrentPathFinished?.Invoke();
        }

    }

    private IEnumerator CalmDown(float time)
    {
        yield return new WaitForSeconds(time);
        _currentEnemy = null;
        StartPatrolBehaviour();
        //StopAllCoroutines();
    }

    private IEnumerator TryToAttack(float attackCoolDown)
    {
        while (_currentEnemy && Vector3.Distance(_currentEnemy.transform.position, transform.position) <= TileManagment.tileOffset * 1.1f)
        {
            //Debug.Log("try attack");
            if (_currentEnemy.currentState != CharacterState.Dead)
            {
                _actionManager.AttackEnemyOnTile(_currentEnemy.currentTile);
                yield return new WaitForSeconds(attackCoolDown);
            }            
        }
        BackToPatrol();
        //StopAllCoroutines();        
    }

    public enum BotState 
    {
        Patrol,
        Agressive,
        Attack,
        Dead
    }
    
}