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

public class storeItemPrefab : MonoBehaviour, IPointerClickHandler, IPointerEnterHandler, IPointerExitHandler
{
    [Header("so")]
    public storeItemSO thisItemSO;

    [Header("basics")]
    public Image thisItem_iconImage;
    public Text thisItem_nameText;
    public Text thisItem_amountAndLimitationText;
    public Image thisPrice_iconImage;
    public Text thisItem_priceText;

    [Header("other")]
    public GameObject rightCorner_statusImage; //这个是用来显示限量或新品等状态的图标
    public GameObject leftCorner_statusImage; //这个是用来显示售罄等状态的图标
    public GameObject lock_cannotClickImage; //这个是用来显示无法点击的锁图标的

    [Header("texts")]
    public Text why_cannot_buy;

    [Header("descriptions")]
    public GameObject descriptionObject;
    public Text itemTitle;
    public Text itemDescription;

    public Action<storeItemPrefab> onItemClicked;

    private const float ShowDelay = 0.5f;
    private const float HideDelay = 0.25f;
    private const float FadeDuration = 0.2f;

    private CanvasGroup descriptionCanvasGroup;
    private Coroutine pendingShowCoroutine;
    private Coroutine pendingHideCoroutine;
    private int lastNotifyFrame = -1;

    private void Awake()
    {
        PrepareDescriptionPanel();
    }

    private void OnDisable()
    {
        StopPendingDescriptionCoroutines();
        if (descriptionCanvasGroup != null)
        {
            descriptionCanvasGroup.DOKill();
            descriptionCanvasGroup.alpha = 0f;
            descriptionCanvasGroup.interactable = false;
            descriptionCanvasGroup.blocksRaycasts = false;
        }

        if (descriptionObject != null)
        {
            descriptionObject.SetActive(false);
        }
    }

    public void OnPointerClick(PointerEventData eventData)
    {
        NotifyClicked();
    }

    public void OnPointerEnter(PointerEventData eventData)
    {
        if (descriptionObject == null) return;

        if (pendingHideCoroutine != null)
        {
            StopCoroutine(pendingHideCoroutine);
            pendingHideCoroutine = null;
        }

        if (pendingShowCoroutine == null)
        {
            pendingShowCoroutine = StartCoroutine(ShowDescriptionWithDelay());
        }
    }

    public void OnPointerExit(PointerEventData eventData)
    {
        if (descriptionObject == null) return;

        if (pendingShowCoroutine != null)
        {
            StopCoroutine(pendingShowCoroutine);
            pendingShowCoroutine = null;
        }

        if (pendingHideCoroutine == null)
        {
            pendingHideCoroutine = StartCoroutine(HideDescriptionWithDelay());
        }
    }

    public void NotifyClicked()
    {
        if (lastNotifyFrame == Time.frameCount)
        {
            return;
        }

        lastNotifyFrame = Time.frameCount;
        if (onItemClicked != null)
        {
            onItemClicked(this);
        }
    }

    public void SetDescriptionContent(string title, string description)
    {
        if (itemTitle != null)
        {
            itemTitle.text = title ?? string.Empty;
        }

        if (itemDescription != null)
        {
            itemDescription.text = string.IsNullOrWhiteSpace(description) ? "暂无描述信息" : description;
        }
    }

    private void PrepareDescriptionPanel()
    {
        if (descriptionObject == null)
        {
            return;
        }

        descriptionCanvasGroup = descriptionObject.GetComponent<CanvasGroup>();
        if (descriptionCanvasGroup == null)
        {
            descriptionCanvasGroup = descriptionObject.AddComponent<CanvasGroup>();
        }

        descriptionCanvasGroup.DOKill();
        descriptionCanvasGroup.alpha = 0f;
        descriptionCanvasGroup.interactable = false;
        descriptionCanvasGroup.blocksRaycasts = false;
        descriptionObject.SetActive(false);
    }

    private IEnumerator ShowDescriptionWithDelay()
    {
        yield return new WaitForSeconds(ShowDelay);
        pendingShowCoroutine = null;
        ShowDescriptionPanel();
    }

    private IEnumerator HideDescriptionWithDelay()
    {
        yield return new WaitForSeconds(HideDelay);
        pendingHideCoroutine = null;
        HideDescriptionPanel();
    }

    private void ShowDescriptionPanel()
    {
        if (descriptionObject == null || descriptionCanvasGroup == null)
        {
            return;
        }

        descriptionCanvasGroup.DOKill();
        descriptionObject.SetActive(true);
        descriptionCanvasGroup.interactable = true;
        descriptionCanvasGroup.blocksRaycasts = true;
        descriptionCanvasGroup.DOFade(1f, FadeDuration).SetEase(Ease.OutQuad);
    }

    private void HideDescriptionPanel()
    {
        if (descriptionObject == null || descriptionCanvasGroup == null)
        {
            return;
        }

        descriptionCanvasGroup.DOKill();
        descriptionCanvasGroup.interactable = false;
        descriptionCanvasGroup.blocksRaycasts = false;
        descriptionCanvasGroup.DOFade(0f, FadeDuration)
            .SetEase(Ease.OutQuad)
            .OnComplete(() =>
            {
                if (descriptionObject != null)
                {
                    descriptionObject.SetActive(false);
                }
            });
    }

    private void StopPendingDescriptionCoroutines()
    {
        if (pendingShowCoroutine != null)
        {
            StopCoroutine(pendingShowCoroutine);
            pendingShowCoroutine = null;
        }

        if (pendingHideCoroutine != null)
        {
            StopCoroutine(pendingHideCoroutine);
            pendingHideCoroutine = null;
        }
    }
}