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

public class ExchangeElement : Selectable, IPointerClickHandler, IPointerEnterHandler, IPointerExitHandler
{
    [SerializeField] private TMP_Text itemLevelText;
    [SerializeField] private TMP_Text itemNameText;

    [SerializeField] private TMP_Text costText;
    [SerializeField] private Image itemImage;
    [SerializeField] private TMP_Text itemAmountText;
    
    [SerializeField] private TMP_Text soldByText;

    public ExchangeElementType ExchangeType;

    [SerializeField] private Image SelectionOutline;
    private WeaponStatsManager statsManager;

    private int itemID;
    private string itemLevel;
    private string itemName;
    private int itemAmount;
    private int itemCost;
    private string sellerName;
    
    protected override void Awake()
    {
        base.Awake();
        interactable = false;
    }

    protected override void Start()
    {
        base.Start();
        statsManager = UIManager.Instance.WeaponStatsManager;
    }

    public void SetData(ExchangeElementType type, int itemID, string itemLevel, string itemName, int cost, int itemAmount, string soldByName = "")
    {
        ExchangeType = type;
        itemLevelText.text = itemLevel;
        itemNameText.text = itemName;
        costText.text = cost.ToString();
        itemAmountText.text = "x" + itemAmount;
        soldByText.text = ExchangeType == ExchangeElementType.BUY ?  "Sold By: " + soldByName : "Your Item";
        itemImage.sprite = UIManager.Instance.RenderItem(itemID);

        this.itemID = itemID;
        this.itemLevel = itemLevel;
        this.itemName = itemName;
        this.itemAmount = itemAmount;
        this.itemCost = cost;
        this.sellerName = soldByName;

        if (ExchangeType != ExchangeElementType.NONE) { interactable = true; }

        //TODO
        //Add clicking func based on ExchangeType. Sell == enable / handle delisting functionality.
        //Buy == configure center menu and actual buying functionality.
        //None == nothing.
    }
    public void OnPointerClick(PointerEventData eventData)
    {
        if (ExchangeType == ExchangeElementType.NONE) return;
        HandleSelection();
    }
    public override void OnPointerEnter(PointerEventData eventData)
    {
        if (ExchangeType == ExchangeElementType.NONE) return;
        ShowWeaponStats();
    }
    public override void OnPointerExit(PointerEventData eventData)
    {
        if (ExchangeType == ExchangeElementType.NONE) return;
        HideWeaponStats();
    }

    public override void OnSelect(BaseEventData data)
    {
       base.OnSelect(data);
       if (ExchangeType == ExchangeElementType.NONE) return;
       if (!Player.Instance.GetInputHandler().UsingGamePad) return;
       
       ShowWeaponStats();
       HandleSelection();
    }

    public override void OnDeselect(BaseEventData data)
    {
        base.OnDeselect(data);
        if (ExchangeType == ExchangeElementType.NONE) return;
        if (!Player.Instance.GetInputHandler().UsingGamePad) return;
        
        HideWeaponStats();
        HandleSelection();
    }
    
    private void ShowWeaponStats()
    {
        statsManager.GetCanvasGroup().DOFade(1, 0.15f);
        statsManager.SetWeaponStatData(OpenWeaponStatType.Exchange, itemID);
    }
    private void HideWeaponStats()
    {
        statsManager.GetCanvasGroup().DOFade(0, 0.15f);
    }

    private void HandleSelection()
    {
        WeaponExchangeController exchangeController = UIManager.Instance.WeaponExchangeController;
        if (ExchangeType == ExchangeElementType.BUY)
        {
            exchangeController.BuyListing.SetData(itemID, itemLevel, itemName, itemCost, itemAmount, sellerName);
        }
        else if (ExchangeType == ExchangeElementType.SELL)
        {
            exchangeController.SetDelistItemData(itemID, itemAmount, itemCost, itemName);
        }
    }
    
}

public enum ExchangeElementType
{
    NONE,
    BUY,
    SELL
}