using UnityEngine;
using UnityEngine.UI;
using System.Collections;
using System.Collections.Generic;
using System;
using Module.Log;
using UnityEngine.Events;

public class UIContainerBlog : UIContainerBase
{
    public GameObject _LoadNextBtn;
    public RectTransform _MoveObj;
    public int _LoadMoreLeastItemCnt = 10;

    [Serializable]
    public class LoadMore : UnityEvent
    {
        public LoadMore() { }
    }

    [SerializeField]
    public LoadMore _LoadMore;

    private Vector2 _ScollSize = Vector2.zero;
    private bool _IsLoadAllItems = false;
    public bool IsLoadAllItems
    {
        get
        {
            return _IsLoadAllItems;
        }
        set
        {
            _IsLoadAllItems = value;
            if (_IsLoadAllItems)
            {
                _LoadNextBtn.SetActive(false);
            }
        }
    }

    public void OnEnable()
    {
        IsLoadAllItems = false;
    }



    public void Update()
    {
        if (_IsLoadAllItems)
            return;

        if (_ScollSize == Vector2.zero)
        {
            _ScollSize = gameObject.GetComponent<RectTransform>().sizeDelta;
            LogModule.DebugLog("ScollSize:" + _ScollSize);
        }

        if (_MoveObj == null)
        {
            _MoveObj = _ContainerObj;
        }

        if (_LoadNextBtn != null)
        {
            if (_ValueList.Count < _LoadMoreLeastItemCnt)
            {
                _LoadNextBtn.SetActive(false);
            }
            else if (_MoveObj.sizeDelta.y < _ScollSize.y)
            {
                _LoadNextBtn.SetActive(false);
            }
            else if (_MoveObj.anchoredPosition.y + _ScollSize.y > _MoveObj.sizeDelta.y - 20)
            {
                _LoadNextBtn.SetActive(true);
            }
            else
            {
                _LoadNextBtn.SetActive(false);
            }
        }
    }

    public void BtnLoadMore()
    {
        if(_LoadMore != null)
            _LoadMore.Invoke();
    }
}