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

public class uScrollViewMgr : BackKeyAdd
{
    public ScrollRect m_ScrollRect;
    public GameObject m_Content;
    public GameObject go_card;

    protected List<CardBase> list_CardBase = new List<CardBase>();
    protected RectTransform contentRt;
    protected override void Awake()
    {
        base.Awake();
        Init();
    }

    protected virtual void Init()
    {
        if (m_ScrollRect)
            contentRt = m_ScrollRect.content;
        else if (m_Content)
            contentRt = m_Content.GetComponent<RectTransform>();
    }

    protected void CardBase_AllOff()
    {
        for (int i = 0; i < list_CardBase.Count; i++)
            list_CardBase[i].gameObject.SetActive(false);
    }

    CardBase MakeCard(int i)
    {
        CardBase temp;
        if (list_CardBase.Count > i) temp = list_CardBase[i];
        else
        {
            temp = DSUtil.Get_Clone<CardBase>(go_card, contentRt);
            list_CardBase.Add(temp);
        }
        return temp;
    }

    protected virtual void Set_ScrollView<T>(List<T> _lst)
    {
        CardBase_AllOff();

        for (int i = 0; i < _lst.Count; i++)
            MakeCard(i).Set(_lst[i]);
    }
    protected virtual void Set_ScrollView_NotSet(int _makecount)
    {
        for (int i = 0; i < _makecount; i++)
        {
            if (list_CardBase.Count > i) { }
            else list_CardBase.Add(DSUtil.Get_Clone<CardBase>(go_card, contentRt));
        }
        CardBase_AllOff();
    }

    protected void ScrollTo_XY(Transform target)
    {
        Set_Coroutine(() =>
        {
            Canvas.ForceUpdateCanvases();
            contentRt.anchoredPosition = (Vector2)m_ScrollRect.transform.InverseTransformPoint(contentRt.position) - (Vector2)m_ScrollRect.transform.InverseTransformPoint(target.position);
        }, Time.deltaTime);
    }
    protected void ScrollTo(Transform target, bool vertical, float halfsize)
    {
        Set_Coroutine(() =>
        {
            Canvas.ForceUpdateCanvases();
            Vector2 offset = (Vector2)m_ScrollRect.transform.InverseTransformPoint(contentRt.position) - (Vector2)m_ScrollRect.transform.InverseTransformPoint(target.position);
            Vector2 anchor = contentRt.anchoredPosition;
            if (vertical) anchor.y = offset.y - halfsize;
            else anchor.x = offset.x - halfsize;
            contentRt.anchoredPosition = anchor;
        }, Time.deltaTime);
    }

    public virtual void Set_UI() { }
}