package com.moral.screen.update;

/**
 * Created by bin.shen on 6/25/16.
 */

import android.app.AlertDialog.Builder;
import android.app.Dialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.DialogInterface.OnClickListener;
import android.content.Intent;
import android.content.pm.PackageManager.NameNotFoundException;
import android.net.Uri;
import android.os.Build;
import android.os.Environment;
import android.os.Handler;
import android.os.Message;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.ProgressBar;

import com.moral.screen.MainActivity;
import com.moral.screen.R;
import com.moral.screen.activity.MapActivity;
import com.moral.screen.common.API;

import org.json.JSONObject;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.HashMap;

public class UpdateManager {
    /* 下载中 */
    private static final int DOWNLOAD = 1;
    /* 下载结束 */
    private static final int DOWNLOAD_FINISH = 2;
    /* 保存解析的XML信息 */
    HashMap<String, String> mHashMap;
    /* 下载保存路径 */
    private String mSavePath;
    /* 记录进度条数量 */
    private int progress;
    /* 是否取消更新 */
    private boolean cancelUpdate = false;

    private MapActivity mActivity;

    /* 更新进度条 */
    private ProgressBar mProgress;
    private Dialog mDownloadDialog;

    private Handler mHandler = new Handler() {
        public void handleMessage(Message msg) {
            switch (msg.what) {
                // 正在下载
                case DOWNLOAD:
                    // 设置进度条位置
                    mProgress.setProgress(progress);
                    break;
                case DOWNLOAD_FINISH:
                    // 安装文件
                    installApk();
                    break;
                default:
                    break;
            }
        }
    };

    public UpdateManager(MapActivity activity) {
        this.mActivity = activity;
    }


    /**
     * 检测软件更新
     */
    public void checkUpdateJson() {
        String data = getUrlData(API.UPDATE);
        try {
            JSONObject resJosn = new JSONObject(data);
            mHashMap = new HashMap<>();
            mHashMap.put("version", resJosn.optString("version"));
            mHashMap.put("name", resJosn.optString("name"));
            mHashMap.put("message", "");
            mHashMap.put("url", resJosn.optString("url"));
            if (isUpdate()) {
                if (Build.VERSION.SDK_INT >= 23) {
                    mActivity.updateAPP();
                } else {
                    // 显示提示对话框
                    showNoticeDialog();
                }
            } else {
//                Log.d("haijiang","已经是最新版本");
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    /**
     * 检查软件是否有更新版本
     *
     * @return
     */
    private boolean isUpdate() {
        // 获取当前软件版本
        int versionCode = getVersionCode(mActivity);
        if (null != mHashMap) {
            int serviceCode = Integer.valueOf(mHashMap.get("version"));
            // 版本判断
            if (serviceCode > versionCode) {
                return true;
            }
        }
        return false;
    }

    /**
     * 获取软件版本号
     *
     * @param context
     * @return
     */
    private int getVersionCode(Context context) {
        int versionCode = 0;
        try {
            // 获取软件版本号，对应AndroidManifest.xml下android:versionCode
            versionCode = context.getPackageManager().getPackageInfo(context.getPackageName(), 0).versionCode;
        } catch (NameNotFoundException e) {
            e.printStackTrace();
        }
        return versionCode;
    }

    /**
     * 显示软件更新对话框
     */
    public void showNoticeDialog() {
        String message = mHashMap.get("message");
        // 构造对话框
        Builder builder = new Builder(mActivity);
        builder.setTitle(R.string.soft_update_title);
        if (message == null || message.isEmpty()) {
            builder.setMessage(R.string.soft_update_info);
        } else {
            builder.setMessage(message);
        }

        // 更新
        builder.setPositiveButton(R.string.soft_update_updatebtn, new OnClickListener() {
            @Override
            public void onClick(DialogInterface dialog, int which) {
                dialog.dismiss();
                // 显示下载对话框
                showDownloadDialog();
            }
        });

        // 稍后更新
        builder.setNegativeButton(R.string.soft_update_later, new OnClickListener() {
            @Override
            public void onClick(DialogInterface dialog, int which) {
                dialog.dismiss();
            }
        });
        Dialog noticeDialog = builder.create();
        noticeDialog.setCanceledOnTouchOutside(false);
        noticeDialog.show();
    }

    /**
     * 显示软件下载对话框
     */
    private void showDownloadDialog() {
        // 构造软件下载对话框
        Builder builder = new Builder(mActivity);
        builder.setTitle(R.string.soft_updating);
        // 给下载对话框增加进度条
        final LayoutInflater inflater = LayoutInflater.from(mActivity);
        View v = inflater.inflate(R.layout.softupdate_progress, null);
        mProgress = (ProgressBar) v.findViewById(R.id.update_progress);
        builder.setView(v);
        // 取消更新
        builder.setNegativeButton(R.string.soft_update_cancel, new OnClickListener() {
            @Override
            public void onClick(DialogInterface dialog, int which) {
                dialog.dismiss();
                // 设置取消状态
                cancelUpdate = true;
            }
        });
        mDownloadDialog = builder.create();
        mDownloadDialog.show();
        // 现在文件
        downloadApk();
    }

    /**
     * 下载apk文件
     */
    private void downloadApk() {
        // 启动新线程下载软件
        new downloadApkThread().start();
    }

    /**
     * 下载文件线程
     *
     * @author coolszy
     * @date 2012-4-26
     * @blog http://blog.92coding.com
     */
    private class downloadApkThread extends Thread {
        @Override
        public void run() {
            try {
                // 判断SD卡是否存在，并且是否具有读写权限
                //if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {
                // 获得存储卡的路径
                //String sdpath = Environment.getExternalStorageDirectory() + "/";
                //mSavePath = sdpath + "download";

                mSavePath = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS) + "/";

                URL url = new URL(mHashMap.get("url"));
                // 创建连接
                HttpURLConnection conn = (HttpURLConnection) url.openConnection();
                conn.connect();
                // 获取文件大小
                int length = conn.getContentLength();
                // 创建输入流
                InputStream is = conn.getInputStream();

                File file = new File(mSavePath);
                // 判断文件目录是否存在
                if (!file.exists()) {
                    file.mkdir();
                }
                File apkFile = new File(mSavePath, mHashMap.get("name"));
                FileOutputStream fos = new FileOutputStream(apkFile);
                int count = 0;
                // 缓存
                byte buf[] = new byte[1024];
                // 写入到文件中
                do {
                    int numread = is.read(buf);
                    count += numread;
                    // 计算进度条位置
                    progress = (int) (((float) count / length) * 100);
                    // 更新进度
                    mHandler.sendEmptyMessage(DOWNLOAD);
                    if (numread <= 0) {
                        // 下载完成
                        mHandler.sendEmptyMessage(DOWNLOAD_FINISH);
                        break;
                    }
                    // 写入文件
                    fos.write(buf, 0, numread);
                } while (!cancelUpdate);// 点击取消就停止下载.
                fos.close();
                is.close();
                //}
            } catch (MalformedURLException e) {
                e.printStackTrace();
            } catch (IOException e) {
                e.printStackTrace();
            }
            // 取消下载对话框显示
            mDownloadDialog.dismiss();
        }
    }

    ;

    /**
     * 安装APK文件
     */
    private void installApk() {
        File apkfile = new File(mSavePath, mHashMap.get("name"));
        if (!apkfile.exists()) {
            return;
        }
        // 通过Intent安装APK文件
        Intent i = new Intent(Intent.ACTION_VIEW);
        i.setDataAndType(Uri.parse("file://" + apkfile.toString()), "application/vnd.android.package-archive");
        mActivity.startActivity(i);
    }

    public static String getUrlData(String path) {
        BufferedReader br = null;
        StringBuffer sb = new StringBuffer();
        HttpURLConnection connection = null;
        try {
            URL url = new URL(path);
            connection = (HttpURLConnection) url.openConnection();
            connection.setRequestMethod("GET");
            connection.setConnectTimeout(8000);
            connection.setReadTimeout(8000);
            br = new BufferedReader(new InputStreamReader(connection.getInputStream()));
            String s = null;
            while ((s = br.readLine()) != null) {
                sb.append(s);
            }
            br.close();
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            if (connection != null) {
                connection.disconnect();
            }
        }
        return sb.toString();
    }


}