using System;
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using DG.Tweening;
using UnityEngine.Video;
using UnityEngine.UI;

public enum EState
{
    none,
    right,
    left,
}
public class TestVideoItem : MonoBehaviour
{
    public Action<EState, int> OnClickVideoItem;
    public int ID;
    //public List<Vector3> VtdeoPos = new List<Vector3>();
    private EState State;
    public VideoPlayer VideoPlayer;
    public VideoClip clip;
    public RawImage image;
    private Transform m_Image;
    private BoxCollider Collider;

    private void Start()
    {
        m_Image = transform.Find("Canvas/RawImage");
        Collider = transform.Find("Canvas/Video").GetComponent<BoxCollider>();
        if (ID == 3)
        {
            PLayerVideo();
            //Collider.enabled = false;
        }
    }

    /// <summary>
    /// 点击UI后判断移动方向
    /// </summary>
    public void OnClickVideo()
    {
        State = ID < 3 ? EState.right : EState.left;
        State = ID == 3 ? EState.none : State;
        if (OnClickVideoItem != null)
        {
            OnClickVideoItem(State, ID);
        }
        Debug.Log(State);
    }

    /// <summary>
    /// 播放旋转动画
    /// </summary>
    /// <param name="vector"></param>
    /// <param name="state"></param>
    public void Play(Vector3 vector, EState state)
    {
        //播放旋转动画时不可点击
        Collider.enabled = false;
        transform.DOLocalMove(vector, 3f);

        //根据ID显示不同的缩放，画面效果
        if (ID == 3)
        {
            transform.DOScale(new Vector3(0.16f, 0.1f, 0.1f), 3f);
        }
        else if (ID == 2 || ID == 4)
        {
            transform.DOScale(new Vector3(0.1f, 0.1f, 0.1f), 3f);
        }
        else
        {
            transform.DOScale(new Vector3(0.1f, 0.09f, 0.1f), 3f);
        }

        StartCoroutine(DoRotate(state));
        StopVideo();
    }


    /// <summary>
    /// 开始旋转动画
    /// </summary>
    /// <param name="state"></param>
    /// <returns></returns>
    IEnumerator DoRotate(EState state)
    {
        switch (state)
        {
            case EState.none:
                break;
            case EState.right:
                transform.DOLocalRotate(new Vector3(0, -60, 0), 1f);
                break;
            case EState.left:
                transform.DOLocalRotate(new Vector3(0, 60, 0), 1f);
                break;
            default:
                break;
        }
        //1.5秒后转回初始角度
        yield return new WaitForSeconds(1.5f);
        transform.DOLocalRotate(new Vector3(0, 0, 0), 1f);
        //1.5秒后播放视频
        yield return new WaitForSeconds(1.5f);
        if (ID == 3)
        {
            PLayerVideo();
        }

        //1.2秒后可重新点击
        yield return new WaitForSeconds(1.2f);
        //if (ID != 3)
        //{
        Collider.enabled = true;
        //}
    }

    private void PLayerVideo()
    {
        VideoPlayer.gameObject.SetActive(true);
        VideoPlayer.clip = clip;
        VideoPlayer.Play();
        StartCoroutine(WaitTime());
    }

    private void StopVideo()
    {
        VideoPlayer.Stop();
        VideoPlayer.clip = null;
        VideoPlayer.transform.localPosition = new Vector3(-0.008f, -0.058f, 0.02f);
        VideoPlayer.gameObject.SetActive(false);
        m_Image.gameObject.SetActive(true);
    }

    /// <summary>
    /// 旋转动画完成后1秒显示视频播放界面
    /// </summary>
    /// <returns></returns>
    IEnumerator WaitTime()
    {
        yield return new WaitForSeconds(1f);
        m_Image.gameObject.SetActive(false);
        VideoPlayer.transform.localPosition = new Vector3(-0.008f, -0.058f, 0f);
    }

    #region 获取视频某一帧图片
    VideoPlayer video;
    Texture2D videoTextrue;
    RenderTexture renderTexture;
    Sprite sprite;
    void InitVideoToImage()//Start
    {
        videoTextrue = new Texture2D(2, 2);
        video = GetComponent<VideoPlayer>();
      //  video.url = path;
        video.playOnAwake = false;
        video.waitForFirstFrame = true;

        video.sendFrameReadyEvents = true;
        video.frameReady += GetNumTextrue;
        video.Play();


    }
    int framesValue = 0;//获得视频第几帧的图片
    /// <summary>
    /// 获取到framesValue帧的Textrue
    /// </summary>
    void GetNumTextrue(VideoPlayer source, long frameIdx)
    {
        framesValue++;
        if (framesValue == 1)
        {
            renderTexture = source.texture as RenderTexture;
            if (videoTextrue.width != renderTexture.width || videoTextrue.height != renderTexture.height)
            {
                videoTextrue.Resize(renderTexture.width, renderTexture.height);
            }
            RenderTexture.active = renderTexture;
            videoTextrue.ReadPixels(new Rect(0, 0, renderTexture.width, renderTexture.height), 0, 0);
            videoTextrue.Apply();
            RenderTexture.active = null;
            video.frameReady -= GetNumTextrue;
            video.sendFrameReadyEvents = false;
        }
        StartCoroutine(ScaleTexture(videoTextrue, 1920, 1080));
    }
    /// <summary>
    /// 生成缩略图
    /// </summary>
    IEnumerator ScaleTexture(Texture2D source, int targetWidth, int targetHeight)
    {
        yield return new WaitForSeconds(2);

        Texture2D result = new Texture2D(targetWidth, targetHeight, TextureFormat.ARGB32, false);

        for (int i = 0; i < result.height; ++i)
        {
            for (int j = 0; j < result.width; ++j)
            {
                Color newColor = source.GetPixelBilinear((float)j / (float)result.width, (float)i / (float)result.height);
                result.SetPixel(j, i, newColor);
            }
        }
        result.Apply();

        sprite = Sprite.Create(result, new Rect(0, 0, targetWidth, targetHeight), new Vector2(0.5f, 0.5f));
        image.texture = sprite.texture;
    }
    #endregion

}