using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.EventSystems;
using UnityEngine.UI;
using TMPro;
using DG.Tweening;

public class BankVaultItemEvents : Selectable, IPointerDownHandler, IPointerUpHandler, IPointerEnterHandler, IPointerExitHandler, IDragHandler, IBeginDragHandler
{

    private int slotId;
    private Vector3 originalPosition;
    private Image thisImage;
    private TextMeshProUGUI inspectText;

    protected override void Start()
    {
        base.Start();
        originalPosition = gameObject.transform.position;
        slotId = int.Parse(gameObject.name.Substring(11));
        thisImage = GetComponent<Image>();

        if (Application.isPlaying)
        {
            inspectText = GameObject.Find("Inventory_inspect").GetComponent<TextMeshProUGUI>();
        }

    }

    public override void OnSelect(BaseEventData eventData)
    {
        base.OnSelect(eventData);
        if (Player.Instance.GetInputHandler().UsingGamePad)
        {
            EnterSlot();
        }
    }

    public override void OnDeselect(BaseEventData eventData)
    {
        base.OnDeselect(eventData);
        if (Player.Instance.GetInputHandler().UsingGamePad)
        {
            OnExit();
        }
    }

    public override void OnPointerEnter(PointerEventData eventData)
    {
        base.OnPointerEnter(eventData);
        EnterSlot();
    }

    public void EnterSlot()
    {
        string name = ItemDef.GetInstance().getItemName(InventoryManager.Instance.bankVaultItems[slotId]);
        string itemLevel = ItemDef.GetInstance().getItemLevel(InventoryManager.Instance.bankVaultItems[slotId]);
        
        if (name == "") { return; }

        inspectText.SetText($"{itemLevel.ToUpper()} {name.ToUpper()}");
        transform.DOScale(Vector3.one * 1.15f, 0.1f).SetEase(Ease.InSine).SetUpdate(true);
    }

    public override void OnPointerExit(PointerEventData eventData)
    {
        base.OnPointerExit(eventData);
        OnExit();
    }

    public void OnExit()
    {
        inspectText.text = "";
        if (EventSystem.current.currentSelectedGameObject != null)
            EventSystem.current.SetSelectedGameObject(null);

        transform.DOScale(Vector3.one, 0.1f).SetEase(Ease.OutSine).SetUpdate(true);
    }

    public override void OnPointerDown(PointerEventData eventData)
    {
        base.OnPointerDown(eventData);
        OnClick();
    }

    public void OnClick()
    {
        if (InventoryManager.Instance.bankVaultItems[slotId] == -1) { return; }
    }

    public void OnBeginDrag(PointerEventData eventData)
    {

    }

    public override void OnPointerUp(PointerEventData eventData)
    {
        base.OnPointerUp(eventData);
        OnClickUp(Input.mousePosition);
    }

    public void OnClickUp(Vector3 mousePosition)
    {
        if (InventoryManager.Instance.bankVaultItems[slotId] == -1) { return; }

        thisImage.color = Color.white;
        if (Vector3.Distance(transform.position, originalPosition) > 3)
        {
            List<RaycastResult> results = new List<RaycastResult>();
            PointerEventData ped = new PointerEventData(EventSystem.current);
            ped.position = mousePosition;
            transform.root.GetComponent<GraphicRaycaster>().Raycast(ped, results);

            if (results.Count <= 1)
            {
                //Do nothing for now.We don't want to drag items over inventory slots to withdraw them for now.
                //if (InventoryManager.Instance.bankVaultItems[slotId] != -1)
                //    {
                //        PacketManager.sendWithdrawBankItem(slotId);
                //    }
            }
            else
            {
                foreach (RaycastResult result in results)
                {
                    if (result.gameObject.name.Contains("bg_slot_"))
                    {
                        int to = int.Parse(result.gameObject.name.Substring(8));
                        if (to != slotId)
                        {
                            //Debug.Log("Sent Packet!");
                            PacketManager.sendMoveItem(slotId, to, 1);
                        }
                    }
                }
            }
        }
        else
        {
            if (InventoryManager.Instance.bankVaultItems[slotId] != -1)
            {
                PacketManager.sendWithdrawBankOrForgeItem(slotId, 0);
            }
        }

        gameObject.transform.position = originalPosition;
    }

    public void OnDrag(PointerEventData eventData)
    {
        //if (InventoryManager.Instance.bankVaultItems[slotId] == -1) { return; }
        //transform.position += (Vector3)eventData.delta;
    }
}