package cn.flightfeather.thirdapp.task;

import android.app.Activity;
import android.os.Environment;
import android.util.Log;
import android.widget.ImageView;
import android.widget.Toast;

import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;

import cn.flightfeather.thirdapp.CommonApplication;
import cn.flightfeather.thirdapp.R;
import cn.flightfeather.thirdapp.bean.entity.Mediafile;
import okhttp3.ResponseBody;
import retrofit2.Call;
import retrofit2.Callback;
import retrofit2.Response;
import retrofit2.http.GET;
import retrofit2.http.Url;

/**
 * Created by note_ff_1602 on 2018/2/9.
 * 下载图片并显示的task
 */

public class DownloadAndSetImageTask  {
    private Mediafile mediafile;
    private ImageView imageView;
    private DownloadService downloadService;
    private CommonApplication application;
    private Activity activity;

    //下载并显示图片
    public DownloadAndSetImageTask(Mediafile mediafile, ImageView imageView, Activity activity) {
        this.mediafile = mediafile;
        this.imageView = imageView;
        this.activity = activity;
        application = (CommonApplication) activity.getApplicationContext();
    }
    //只下载
    public DownloadAndSetImageTask(Mediafile mediafile, Activity activity) {
        this.mediafile = mediafile;
        application = (CommonApplication) activity.getApplicationContext();
        try {
            this.activity = (Activity) activity;
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    //执行下载任务
    public void execute(){
        if (imageView!=null){
            imageView.setImageResource(R.drawable.icon_add_photo_waite);
        }
        downloadService = application.getRetrofitImage().create(DownloadService.class);
        String url = mediafile.getExtension1()+mediafile.getGuid()+".jpg";
        Call<ResponseBody> downloadImage = downloadService.downloadImage(url);
        downloadImage.enqueue(new Callback<ResponseBody>() {
            @Override
            public void onResponse(Call<ResponseBody> call, Response<ResponseBody> response) {
                if (response.body()!=null){
                    File file =  writeResponseBodyToDisk(mediafile,response.body());
                    if (file!=null&&imageView!=null){
                        setImage(file,imageView);
                    }
                }else if (response.errorBody()!=null){
//                    Toast.makeText(application, "获取图片失败", Toast.LENGTH_SHORT).show();
                    Log.e("downloadImage:",response.errorBody().toString());
                }

            }

            @Override
            public void onFailure(Call<ResponseBody> call, Throwable t) {
                Toast.makeText(application, "联网失败", Toast.LENGTH_SHORT).show();
                Log.e("downloadImage:",t.toString());
            }
        });
    }

    //将下载的图片写入磁盘
    public  File writeResponseBodyToDisk(Mediafile mediafile, ResponseBody body) {
        if(body==null){
            Toast.makeText(application, "图片源错误", Toast.LENGTH_SHORT).show();
            return null;
        }
        try {
            InputStream is = body.byteStream();
            File file = new File(Environment.getExternalStorageDirectory(),(mediafile.getPath() + mediafile.getDescription()));
            if (file.exists()) {
                file.delete();
                file = new File(Environment.getExternalStorageDirectory(),(mediafile.getPath() + mediafile.getDescription()) );
            }
            file.getParentFile().mkdirs();
            FileOutputStream fos = new FileOutputStream(file);
            BufferedInputStream bis = new BufferedInputStream(is);
            byte[] buffer = new byte[1024];
            int len;
            while ((len = bis.read(buffer)) != -1) {
                fos.write(buffer, 0, len);
            }
            fos.flush();
            fos.close();
            bis.close();
            is.close();
            return file;
        } catch (IOException e) {
            e.printStackTrace();
            return null;
        }
    }
    //显示图像
    private void setImage(File file,ImageView imageView){
        if (file!=null&&imageView!=null){
            SetImageTask task = new SetImageTask(file,imageView, activity);
            task.execute();
        }
    }

    interface DownloadService{
        @GET
        Call<ResponseBody> downloadImage(@Url String fileUrl);
    }
}