using UnityEngine;
using System.Collections;
using System.IO;
using System;
using System.Collections.Generic;
using UnityEngine.UI;

public class GetImage : MonoBehaviour
{

    public Camera mainCam; //待截图的目标摄像机
    public string path;
    RenderTexture rt;  //声明一个截图时候用的中间变量 
    Texture2D t2d;
    int num = 0;  //截图计数
    [Header("服务器地址")]
    public string ServerPath;
    [Header("播放图片集的RenderTex")]
    public Image imgPlayer;
    private List<byte[]> imgList = new List<byte[]>();


    //public GameObject pl;  //一个调试用的板子



    void Start()
    {
        t2d = new Texture2D(1920, 1080, TextureFormat.RGB24, false);
        rt = new RenderTexture(1920, 1080, 24);
        mainCam.targetTexture = rt;

        

    }

    void Update()
    {
        //按下空格键来截图
        if (Input.GetKey(KeyCode.Space))
        {
            //将目标摄像机的图像显示到一个板子上
            //pl.GetComponent<Renderer>().material.mainTexture = rt;

            //截图到t2d中
            RenderTexture.active = rt;
            t2d.ReadPixels(new Rect(0, 0, rt.width, rt.height), 0, 0);
            t2d.Apply();
            RenderTexture.active = null;

            //将图片保存起来
            byte[] byt = t2d.EncodeToJPG();
            imgList.Add(byt);
            // File.WriteAllBytes(Application.dataPath + "/" +path+"/"+ num.ToString() + ".jpg", byt);
            if (ServerPath != "")
            {
                StartCoroutine(UnLoadImage(byt));
            }
            

            Debug.Log("当前截图序号为：" + num.ToString());
            num++;

           
        }
    }

    /// <summary>
    /// 上传到服务器
    /// </summary>
    /// <param name="path0"></param>
    /// <returns></returns>
    IEnumerator UnLoadImage(byte[] data)
    {
        yield return new WaitForEndOfFrame();
        try
        {
            byte[] bytes = data;
            WWWForm form = new WWWForm();
            form.AddField("Name", num);
            form.AddBinaryData("post", bytes);
            WWW www = new WWW(ServerPath, form);
            
            StartCoroutine(PostData(www));
        }
        catch (Exception e)
        {
            Debug.Log("出现异常：" + e);
        }
        //Destroy(tex);
    }
    /// <summary>
    /// 返回服务器信息
    /// </summary>
    /// <param name="www"></param>
    /// <returns></returns>
    IEnumerator PostData(WWW www)
    {
        yield return www;
        Debug.Log(www.text);
    }

    public void PlayImgsAction()
    {
        if (imgPlayer != null)
        {
           StartCoroutine(PlayImg());
        }
    }

    IEnumerator PlayImg()
    {
        for (int i = 0; i < imgList.Count; i++)
        {
            yield return new WaitForEndOfFrame();
            int width = 1920;
            int height = 1080;
            byte[] bytes = imgList[i];//资源
            Texture2D texture = new Texture2D(width, height);
            texture.LoadImage(bytes);
            Sprite sprite = Sprite.Create(texture, new Rect(0, 0, texture.width, texture.height), new Vector2(0.5f, 0.5f));
            imgPlayer.sprite = sprite;
            Resources.UnloadUnusedAssets(); //一定要清理游离资源。

        }
    }
    
}