import android.app.AlertDialog;

import android.app.Dialog;

import android.app.Service;

import android.content.DialogInterface;

import android.content.Intent;

import android.content.pm.PackageInfo;

import android.content.pm.PackageManager;

import android.graphics.Color;

import android.net.Uri;

import android.os.Environment;

import android.os.Handler;

import android.os.IBinder;

import android.os.Message;

import android.support.annotation.Nullable;

import android.util.Log;

import android.view.LayoutInflater;

import android.view.View;

import android.view.WindowManager;

import android.widget.ProgressBar;

import android.widget.TextView;

import com.example.sdtz.wenmingweifang.R;

import com.example.sdtz.wenmingweifang.Tool.OkHttpUtil;

import com.example.sdtz.wenmingweifang.Util.App;

import com.example.sdtz.wenmingweifang.Util.MyUrl;

import org.json.JSONException;

import org.json.JSONObject;

import java.io.File;

import java.io.FileOutputStream;

import java.io.InputStream;

import java.net.HttpURLConnection;

import java.net.URL;

/**

 * Created by sdtz on 2017/7/1.

 */

public class UpdateService extends Service {

    private ProgressBar mProgressBar;//进度条

    private TextView tv1;

    private TextView tv2;

    private String url = MyUrl.Httpurl;

    private String VersionCode;

    private String result;

    private App app;

    private String mSavePath;//apk保存地址

    private String mVersion_path;

    private String mVersion_name = "app.apk";//apk名

    private float length;

    private Dialog mDownloadDialog;//对话框

    private int mProgress;//进度值

    private static final int DOWNLOADING = 1;//apk下载中

    private static final int DOWNLOAD_FINISH = 2;//apk下载完毕

    private boolean mIsCancel = false;//是否取消下载标示符

    @Nullable

    @Override

    public IBinder onBind(Intent intent) {

        return null;

    }

    private Handler mUpdateProgressHandler = new Handler(){

        public void handleMessage(Message msg) {

            switch (msg.what){

                case DOWNLOADING:

                    // 设置进度条

                    mProgressBar.setProgress(mProgress);

                    tv1.setText( mProgress + "/100");

                    float len = length/1024/1024;//将length转换为M单位

                    float b = (float)(Math.round(len*100))/100;//保留两位小数点

                    tv2.setText( b+"M");

                    break;

                case DOWNLOAD_FINISH:

                    // 隐藏当前下载对话框

                    mDownloadDialog.dismiss();

                    // 安装 APK 文件

                    installAPK();

                    break;

                default:

                    break;

            }

        };

    };

    @Override

    public int onStartCommand(Intent intent, int flags, int startId) {

        try {

            VersionCode = getVersionName();

         /*   getJsonReuslt();*/

            new OkHttpUtil().getJson(MyUrl.appdown, new OkHttpUtil.HttpCallBack() {

                @Override

                public void onSusscess(String data) throws JSONException {

                    JSONObject jo1 = new JSONObject(data);

                    app = new App();

                    app.setVersion(jo1.getString("version").toString());

                    app.setDescription(jo1.getString("description").toString());

                    app.setUrl(MyUrl.Httpurl+jo1.getString("url").toString());

                    app.setUpdate_flag(jo1.getString("update_flag").toString());

                    mVersion_path = app.getUrl();

                    //手机当前版本

                    String phoneVersion = VersionCode.substring(0,VersionCode.lastIndexOf("."));

                    Double jiekou = Double.parseDouble(app.getVersion());

                    Double bendi = null;

                    try {

                        bendi = Double.parseDouble(getVersionName());

                    } catch (Exception e) {

                        e.printStackTrace();

                    }

                    Log.d("==","接口："+jiekou+"本地："+bendi+"::"+app.toString());

                    //本地版本 与 接口返回版本 不一致，并且 更新标志为1 ，则更新

                    if( !VersionCode.equals(app.getVersion()) && (jiekou>bendi) && app.getUpdate_flag().equals("1")){

                        Log.d("==","::进入");

                        showDialog(app.getDescription());

                    }else if( !VersionCode.equals(app.getVersion()) && (jiekou>bendi) && app.getUpdate_flag().equals("2")){

                        showDownloadDialog();

                    }

                }

            });

        } catch (Exception e) {

            e.printStackTrace();

        } catch (Throwable throwable) {

            throwable.printStackTrace();

        }

        return super.onStartCommand(intent, flags, startId);

    }

    /*

     * 获取当前程序的版本号

     */

    private String getVersionName() throws Exception{

        //获取packagemanager的实例

        PackageManager packageManager = getPackageManager();

        //getPackageName()是你当前类的包名，0代表是获取版本信息

        PackageInfo packInfo = packageManager.getPackageInfo(getPackageName(), 0);

        return packInfo.versionName;

    }

    private void showDialog(String drc) {

        final AlertDialog.Builder builder = new AlertDialog.Builder(this,AlertDialog.THEME_HOLO_LIGHT);

        builder.setMessage(drc);

        builder.setPositiveButton("确定", new DialogInterface.OnClickListener() {

            @Override

            public void onClick(DialogInterface dialogInterface, int i) {

                showDownloadDialog();

            }

        });

        builder.setNegativeButton("取消", new DialogInterface.OnClickListener() {

            @Override

            public void onClick(DialogInterface dialogInterface, int i) {

               dialogInterface.dismiss();

            }

        });

        AlertDialog alertDialog = builder.create();

        alertDialog.getWindow().setType(WindowManager.LayoutParams.TYPE_SYSTEM_ALERT);

        alertDialog.setCanceledOnTouchOutside(true);

        alertDialog.show();

        alertDialog.getButton(alertDialog.BUTTON_POSITIVE).setTextColor(Color.GREEN);

        alertDialog.getButton(alertDialog.BUTTON_NEGATIVE).setTextColor(Color.RED);

    }

    /*

     * 开启新线程下载文件

     */

    private void downloadAPK() {

        new Thread(new Runnable() {

            @Override

            public void run() {

                try{//检查sd是否挂载

                    if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)){

                        String sdPath = Environment.getExternalStorageDirectory() + "/";

                        mSavePath = sdPath + "WenmingDownload";

                        File dir = new File(mSavePath);

                        if (!dir.exists())

                            dir.mkdir();

                        // 下载文件

                        HttpURLConnection conn = (HttpURLConnection) new URL(mVersion_path).openConnection();

                        conn.connect();

                        InputStream is = conn.getInputStream();

                        length = conn.getContentLength();

                        File apkFile = new File(mSavePath, mVersion_name);

                        FileOutputStream fos = new FileOutputStream(apkFile);

                        int count = 0;

                        byte[] buffer = new byte[1024];

                        while (!mIsCancel){

                            int numread = is.read(buffer);

                            count += numread;

                            // 计算进度条的当前位置

                            mProgress = (int) ((count/length) * 100);

                            // 更新进度条

                            mUpdateProgressHandler.sendEmptyMessage(DOWNLOADING);

                            // 下载完成

                            if (numread < 0){

                                mUpdateProgressHandler.sendEmptyMessage(DOWNLOAD_FINISH);

                                break;

                            }

                            fos.write(buffer, 0, numread);

                        }

                        fos.close();

                        is.close();

                    }

                }catch(Exception e){

                    e.printStackTrace();

                }

            }

        }).start();

    }

    /*

    * 下载到本地后执行安装

    */

    protected void installAPK() {

        File apkFile = new File(mSavePath, mVersion_name);

        if (!apkFile.exists())

            return;

        Intent intent = new Intent(Intent.ACTION_VIEW);

        Uri uri = Uri.parse("file://" + apkFile.toString());

        intent.setDataAndType(uri, "application/vnd.android.package-archive");

        intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);

        this.startActivity(intent);

    }

    /*

     * 显示正在下载对话框

     */

    protected void showDownloadDialog() {

        AlertDialog.Builder builder = new AlertDialog.Builder(this);

        builder.setTitle("版本更新，下载中。。。");

        View view = LayoutInflater.from(this).inflate(R.layout.dialog_progress, null);

        mProgressBar = (ProgressBar) view.findViewById(R.id.id_progress);

        tv1 = (TextView) view.findViewById(R.id.tv1);

        tv2 = (TextView) view.findViewById(R.id.tv2);

        builder.setView(view);

        mDownloadDialog = builder.create();

        mDownloadDialog.getWindow().setType(WindowManager.LayoutParams.TYPE_SYSTEM_ALERT);

        mDownloadDialog.show();

        // 下载文件

        downloadAPK();

    }

}