using System.Collections;
using System.Collections.Generic;
using System.Threading.Tasks;
using UnityEngine;
using UnityEngine.UI;
using DG.Tweening;

public class Carousel : UIController
{
    [SerializeField] Button[] Btn;
    [SerializeField] Button PrototypeBtn;
    [SerializeField] Transform ParentGame;
    /// <summary>
    /// 图片地址
    /// </summary>
    [SerializeField] List<string> url;
    int MoveSum = 0;
    [SerializeField] CarouselSmall CarouselSmall;
    [SerializeField] Button Btn1;
    [SerializeField] Button Btn2;
    /// <summary>
    /// 链接地址
    /// </summary>
    [SerializeField] List<string> links;
    void Start()
    {
        Btn1.onClick.AddListener(() =>
        {
            if (MoveSum % Btn.Length == 0)
            {
                MoveSum = 0;
            }
            show(MoveSum);
            MoveSum++;
            Debug.Log(MoveSum);
        });
        Btn2.onClick.AddListener(() =>
        {
            if (MoveSum % Btn.Length == 0)
            {
                MoveSum = Btn.Length;
            }
            MoveSum--;
            show(MoveSum);
            Debug.Log(MoveSum);
        });
    }

    /// <summary>
    /// 初始化
    /// </summary>
    /// <param name="urls">图片地址</param>
    /// <param name="links">链接地址</param>
    public void init(List<string> urls, List<string> links=null)
    {
        if (Btn != null)
        {
            //清空item
            for (int i = 0; i < Btn.Length; i++)
            {
                Destroy(Btn[i].gameObject);
            }
            Btn = null;
        }

        this.url = urls;
        this.links = links;

        gameObject.SetActive(true);

        //生成item
        if (url.Count != 0)
        {
            Btn = new Button[url.Count];
            for (int i = 0; i < url.Count; i++)
            {
                Btn[i] = Instantiate(PrototypeBtn, ParentGame);
                Btn[i].name = i.ToString();
            }
            PrototypeBtn.gameObject.SetActive(false); //降低batches

            if (Btn.Length != 0)
            {
                foreach (var item in Btn)
                {
                    item.gameObject.SetActive(true);
                    item.onClick.AddListener(() => Application.OpenURL(links[int.Parse(item.name)]));
                    UIManager.ins.LoadImageAsync(url[int.Parse(item.name)], item.image, false);
                }
                for (int i = 0; i < Btn.Length; i++)
                {
                    if (i > 0)
                    {
                        Btn[i].transform.DOLocalMoveX(Btn[i].transform.GetComponent<RectTransform>().sizeDelta.x * i, 0.01f);
                    }
                }
            }
        }
        //CarouselSmall.init(Btn.Length);
        //CarouselSmall.show(MoveSum);
    }

    float time = 0;
    private void Update()
    {
        time += Time.deltaTime;
        if(time>=3)
        {
            time = 0;
            show();
        }
    }

    new void show()
    {
        if (Btn != null)
        {
            if (Btn.Length > 1)
            {
                if (MoveSum % Btn.Length != 0)
                {
                    ParentGame.DOLocalMoveX(-MoveSum * 736, 0.25f);
                    CarouselSmall.show(MoveSum);
                }
                else
                {
                    MoveSum = 0;
                    ParentGame.DOLocalMoveX(-MoveSum * 736, 0.25f);
                    CarouselSmall.show(MoveSum);
                }
                MoveSum++;
            }
        }
    }
    public void show(int sum)
    {
        if (Btn.Length > 1)
        {
            ParentGame.DOLocalMoveX(-sum * 736, 0.25f);
        }
        MoveSum = sum;
    }
}