using UnityEngine;
using UnityEngine.UI;

public class Scroll : UIBase
{
    public Image pre;
    public Image next;

    //当前选中的纹样
    private GameObject current;
    private string choosed = "Choosed";
    private string unchoose = "Unchoose";

    // Start is called before the first frame update



    void Start()
    {
        //初始化纹样，第一个自动选中，并赋值给current

        
        pre.GetComponent<Button>().onClick.AddListener(() =>
        {
            Debug.Log("pre");
            int index = current.transform.GetSiblingIndex();
            if (index > 0)
            {
                // 获取上一个兄弟节点
                Transform previous = current.transform.parent.GetChild(index - 1);
                updateChoosed(current, previous.gameObject);
            }
        });
        next.GetComponent<Button>().onClick.AddListener(() =>
        {
            Debug.Log("next");
            int index = current.transform.GetSiblingIndex();
            int siblingCount = current.transform.parent.childCount;

            if (index < siblingCount - 1)
            {
                // 获取下一个兄弟节点
                Transform nextSibling = current.transform.parent.GetChild(index + 1);
                updateChoosed(current, nextSibling.gameObject);
            }
        });

    }

    // Update is called once per frame
    void Update()
    {
    }

    public void ShowLog()
    {
        Debug.Log("this is UI: " + gameObject.name);
    }

    protected override void CloseComplete()
    {
        base.CloseComplete();
        Debug.Log("关闭完成：  " + gameObject.name);
    }

    protected override void OpenComplete()
    {
        base.OpenComplete();
        Debug.Log("打开完成：  " + gameObject.name);
    }

    private void SetChoosed(GameObject obj)
    {
        var choosedObj = obj.transform.Find(choosed).gameObject;
        if (choosedObj != null) 
            choosedObj.SetActive(true);
        
        var unchoosedObj = obj.transform.Find(unchoose).gameObject;
        if (unchoosedObj != null) 
            choosedObj.SetActive(false);
    }
    
    private void SetUnchoose(GameObject obj)
    {
        var choosedObj = obj.transform.Find(choosed).gameObject;
        if (choosedObj != null) 
            choosedObj.SetActive(false);
        
        var unchoosedObj = obj.transform.Find(unchoose).gameObject;
        if (unchoosedObj != null) 
            choosedObj.SetActive(true);
    }
    
    //更改选中的纹样
    private void updateChoosed(GameObject unChooseObj, GameObject chooseObj)
    {
        SetUnchoose(unChooseObj);

        SetChoosed(chooseObj);
        // 更新 current 引用
        current =chooseObj;
    }
}