using System;
using System.Collections;
using System.Collections.Generic;
using Api;
using UI.Common;
using Unity.VisualScripting;
using UnityEngine;
using UnityEngine.UI;
using UnityEngine.UIElements;

public class DiamondChooseComp : MonoBehaviour
{
    public ScrollRect scrollRect;

    public Text Item;

    public float smoothTime = 1.0f;
    public static int[] DiamondArray = new[] { 200, 500, 1000, 2000 };

    private int curindex = 0;
    private bool _scrolling = false;


    public int getSelectDiamond()
    {
        return DiamondArray[curindex];
    }

    public Action<int> OnDiamondChange;

    public void gameStart()
    {
        _scrolling = true;
    }

    // Start is called before the first frame update
    void Start()
    {
        //从第一个开始复制
        for (var i = 0; i < DiamondArray.Length; i++)
        {
            if (i == 0)
            {
                Item.GetComponent<Text>().text = "" + DiamondArray[i];
            }
            else
            {
                Instantiate(Item, scrollRect.content, false).GetComponent<Text>().text = "" + DiamondArray[i];
            }
        }
    }

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

    public void A__ClickChangedDiamond()
    {
        if (!_scrolling)
        {
            _scrolling = true;
            if (curindex + 1 < DiamondArray.Length)
            {
                int nextDiamond = DiamondArray[curindex + 1];

                if (AccountManager.Instance.GetDiamond() >= nextDiamond)
                {
                    curindex += 1;

                    DiaplayNextDiamond(curindex);

                    OnDiamondChange?.Invoke(CurSelectDiamond());
                }
                else
                {
                    TipsComp.ShowTips("Max Diamond");
                }
            }
        }

        Debug.Log("当前选择钻石是" + CurSelectDiamond());
    }

    public int CurSelectDiamond()
    {
        return DiamondArray[curindex];
    }


    public void DiaplayNextDiamond(int index)
    {
        Transform child = scrollRect.content.GetChild(index);
        RectTransform childRectTransform = child.GetComponent<RectTransform>();
        RectTransform scrollViewRectTransform = scrollRect.GetComponent<RectTransform>();

        // 计算子物体相对于ScrollView的偏移量
        Vector2 offset = scrollViewRectTransform.InverseTransformPoint(childRectTransform.position) -
                         scrollViewRectTransform.InverseTransformPoint(scrollViewRectTransform.position);


        // 滚动ScrollView
        StartCoroutine(SmoothScrollCoroutine(offset));
        // scrollRect.ScrollTo()
    }


    IEnumerator SmoothScrollCoroutine(Vector2 offset)
    {
        float elapsedTime = 0;
        Vector2 startingPos = scrollRect.content.anchoredPosition;
        Vector2 targetPos = startingPos - offset;

        while (elapsedTime < smoothTime)
        {
            elapsedTime += Time.deltaTime;
            scrollRect.content.anchoredPosition =
                Vector2.Lerp(startingPos, targetPos, Mathf.SmoothStep(0, 1, elapsedTime / smoothTime));
            _scrolling = false;

            yield return null;
        }

        scrollRect.content.anchoredPosition = targetPos;
    }
}