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

public class PositioningState : IState
{
    GameManager gm;
    GameObject chip;
    Transform chipPointer;
    SpriteRenderer pointerRend;
    int index;
    int position;
    bool canMove;


    const int DEFAULT_SPEED = 50;

    List<int> validPositions;

    public void enter()
    {
        //DebugWindow.Message("Позиционирование");
        gm = GameManager.instance;
        CollectValidPositions();

        canMove = true;

        //получаем ссылку на фишку
        chip = gm.currentChip;

        int centralIndex = validPositions.Count / 2;
        index = centralIndex;
        position = validPositions[centralIndex];
        gm.currentColumnIndex = validPositions[centralIndex];

        //ставим фишку на стартовую точку
        //float offsety = 5;
        float offsety = gm.startY;
        if (gm.gameMode == GameMode.pvp) offsety = gm.startY + 5;//повыше


        float x = gm.slotLeftTop.position.x + validPositions[index] * gm.stepX;
        float y = gm.startY + offsety;
        chip.transform.position = new Vector3(x, y, 0);

        chip.SetActive(true);
        gm.chipYSpeed = 0;


        //настройка указателя куда упадет фишка
        chipPointer = new GameObject("Pointer").transform;
        chipPointer.position = new Vector3(100, 100);
        chipPointer.localScale = new Vector2(1.15f, 1.15f);
        chipPointer.gameObject.SetActive(false);
        pointerRend = chipPointer.gameObject.AddComponent<SpriteRenderer>();
        pointerRend.enabled = false;
        pointerRend.sprite = gm.chipPointer;
        pointerRend.color = gm.currentPlayer == CellState.Player1 ? new Color(1, .5f, 0, 1) : new Color(0, .3f, 1, 1);
        pointerRend.sortingLayerName = "Middle";
        pointerRend.enabled = true;

        //НАДО POINTER ЯРЧЕ!

        chipPointer.gameObject.SetActive(true);
    }

    public void exit()
    {
        gm.pvpPointer.SetVisibility(false);
        gm.StartCoroutine(DestroyPointer());
    }

    public void update()
    {
        #region Получение инпутов
        bool left = false,
             right = false,
             action = false;

        if (gm.gameMode == GameMode.pvp)
        {
            left = In.GetButtonDownCurrentPlayer(PlayerAction.left);
            right = In.GetButtonDownCurrentPlayer(PlayerAction.right);
            action = In.GetButtonDownCurrentPlayer(PlayerAction.down);
        }
        else if (gm.gameMode == GameMode.pve)
        {
            left = In.GetButtonDownAnyPlayer(PlayerAction.left);
            right = In.GetButtonDownAnyPlayer(PlayerAction.right);
            action = In.GetButtonDownAnyPlayer(PlayerAction.down);

            gm.vsBotThinkTime += Time.deltaTime;
        }
        #endregion

        #region Обработка left|right
        if (canMove)
        {
            //вычисляем куда двигаться
            int direction = 0;
            if (left && right)
                direction = 0;
            else if (left)
                direction = -1;
            else if (right)
                direction = 1;

            //если двигаемся
            if (direction != 0)
            {
                index = Mathf.Clamp(index + direction, 0, validPositions.Count - 1);
                int prevPos = position;
                position = validPositions[index];
                int dist = Mathf.Abs(position - prevPos);
                gm.chipXSpeed = dist * DEFAULT_SPEED;//скорость зануляется
                gm.currentColumnIndex = position;
                SoundManager.instance.playSwitch();
            }

        }
        #endregion

        float targetX = gm.slotLeftTop.position.x +
                                gm.currentColumnIndex *
                                gm.stepX;



        float targetY = gm.startY;
        Vector2 targetPosition = new Vector2(targetX, targetY);

        float speed = DEFAULT_SPEED;

        //УКАЗАТЕЛЬ
        float pointerY = gm.slotLeftTop.transform.position.y - gm.stepY * GameManager.fieldModel.getHeight(position);
        chipPointer.position = new Vector2(targetX, pointerY);
        Color color = pointerRend.color;
        color.a = 0.8f + Mathf.Sin(Time.time * 7) * 0.2f;
        pointerRend.color = color;



        if (gm.gameMode == GameMode.pvp)
        {
            gm.pvpPointer.SetColor(gm.currentPlayer);
            gm.pvpPointer.SetVisibility(true);
            gm.pvpPointer.MoveTo(targetPosition);

            targetPosition += Vector2.up * 5;//повыше
        }

        chip.transform.position = Vector2.MoveTowards(chip.transform.position, targetPosition, speed * Time.deltaTime);

        if ((Vector2)chip.transform.position == targetPosition)
            canMove = true;
        else
            canMove = false;

        if (action)
        {
            if (canMove && GameManager.fieldModel.getHeight(gm.currentColumnIndex) != -1)
            {
                float delayBeforeStartFalling = 0;

                if (gm.gameMode == GameMode.pve)
                {
                    gm.vsBotMoves += 1;
                }
                if (gm.gameMode == GameMode.pvp)
                {
                    AvatarEventBus.Instance.OnTurnEnd?.Invoke(gm.currentPlayer);
                    delayBeforeStartFalling = DualAvatarController.Instance.CurrentAvatar.ChipSpawnTime;
                }

                gm.moveMade = true;
                gm.stateMachine.ChangeState(new ChipFallingState(startDelay: delayBeforeStartFalling));
            }
            else
            {
                SoundManager.instance.playWrong();
            }
        }

        //ВЫХОД ДО ПЕРВОГО ХОДА
        bool exitPressed = In.GetButtonDown(ButtonPinMapping.startOnePlayer) || In.GetButtonDown(ButtonPinMapping.startTwoPlayers);
        if (exitPressed && !gm.moveMade)
        {
            FieldCleaner.Clear();
            PaymentSystem.ReturnCredits(gm.gameMode);
            GameManager.instance.timerManager.StopAllTimers();
            //GameManager.instance.stateMachine.ChangeState(new MenuState(fromGameplay: true));
            GameManager.instance.stateMachine.ChangeState(new MenuState());
        }
    }



    void CollectValidPositions()
    {
        validPositions = new List<int>();
        for (int i = 0; i < gm.Cols; i++)
        {
            if (GameManager.fieldModel.getHeight(i) != -1)
            {
                validPositions.Add(i);
            }
        }
    }

    IEnumerator DestroyPointer()
    {
        Color color = pointerRend.color;
        float t = 1;
        while (t > 0)
        {
            t -= Time.deltaTime * 3;
            color.a = t;
            pointerRend.color = color;
            yield return null;
        }
        Object.Destroy(chipPointer.gameObject);
    }
}