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

public class UIAutoAdjustWidth : MonoBehaviour
{
    private RectTransform m_rtfSelf;

    private Vector2 m_targetSize;

    private void OnEnable()
    {
        m_rtfSelf = transform.GetComponent<RectTransform>();

        m_targetSize = new Vector2(GetFullUIWidth(), m_rtfSelf.rect.height);

        RefreshSize();
    }

    public void SetRectTransformSize(RectTransform trans, Vector2 newSize)
    {
        Vector2 oldSize = trans.rect.size;
        Vector2 deltaSize = newSize - oldSize;
        trans.offsetMin = trans.offsetMin - new Vector2(deltaSize.x * trans.pivot.x, deltaSize.y * trans.pivot.y);
        trans.offsetMax = trans.offsetMax + new Vector2(deltaSize.x * (1f - trans.pivot.x), deltaSize.y * (1f - trans.pivot.y));
    }

    private float GetFullUIWidth()
    {
        int devWidth = ScreenAutoAdjust.DevWidth;

        // 屏幕比 > 2:1的用 2:1, 小于2:1的用16:9
        float screenRate = (float)Screen.width / (float)Screen.height;
        if (screenRate < 1.98f)
            devWidth = ScreenAutoAdjust.DevHeight * 16 / 9;

        return Mathf.Max(screenRate * ScreenAutoAdjust.DevHeight, devWidth);
    }

    //private float GetFullUIHeight()
    //{
    //    //float devHeight = 900;
    //    //屏幕比 < 16:9的用
    //    //local screenRate = (float)Screen.width / (float)Screen.height


    //    //if (screenRate < 1.77f)
    //    //    devWidth = 1600;





    //}

    //#if UNITY_EDITOR
    //    private void Update()
    //    {
    //        m_targetSize = new Vector2(GetFullUIWidth(), m_rtfSelf.rect.height);
    //        RefreshSize();
    //    }
    //#endif

    private void RefreshSize()
    {
        SetRectTransformSize(m_rtfSelf, m_targetSize);
    }
}