/*
Orlib is distributed under this license (aka the 3-clause BSD license)

        Copyright (c) 2009-2010, Nathan Freitas, The Guardian Project

        Redistribution and use in source and binary forms, with or without
        modification, are permitted provided that the following conditions are
        met:

        * Redistributions of source code must retain the above copyright
        notice, this list of conditions and the following disclaimer.

        * Redistributions in binary form must reproduce the above
        copyright notice, this list of conditions and the following disclaimer
        in the documentation and/or other materials provided with the
        distribution.

        * Neither the names of the copyright owners nor the names of its
        contributors may be used to endorse or promote products derived from
        this software without specific prior written permission.

        THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
        "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
        LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
        A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
        OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
        SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
        LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
        DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
        THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
        (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
        OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package org.sufficientlysecure.keychain.util.orbot;

import android.app.Activity;
import android.app.AlertDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.net.Uri;
import org.sufficientlysecure.keychain.R;


public class OrbotHelper {

    private final static int REQUEST_CODE_STATUS = 100;

    public final static String ORBOT_PACKAGE_NAME = "org.torproject.android";
    public final static String TOR_BIN_PATH = "/data/data/org.torproject.android/app_bin/tor";

    public final static String ACTION_START_TOR = "org.torproject.android.START_TOR";
    public final static String ACTION_REQUEST_HS = "org.torproject.android.REQUEST_HS_PORT";
    public final static int HS_REQUEST_CODE = 9999;

    private Context mContext = null;

    public OrbotHelper(Context context)
    {
        mContext = context;
    }

    public boolean isOrbotRunning()
    {
        int procId = TorServiceUtils.findProcessId(TOR_BIN_PATH);

        return (procId != -1);
    }

    public boolean isOrbotInstalled()
    {
        return isAppInstalled(ORBOT_PACKAGE_NAME);
    }

    private boolean isAppInstalled(String uri) {
        PackageManager pm = mContext.getPackageManager();
        boolean installed = false;
        try {
            pm.getPackageInfo(uri, PackageManager.GET_ACTIVITIES);
            installed = true;
        } catch (PackageManager.NameNotFoundException e) {
            installed = false;
        }
        return installed;
    }

    public void promptToInstall(Activity activity)
    {
        String uriMarket = activity.getString(R.string.market_orbot);
        // show dialog - install from market, f-droid or direct APK
        showDownloadDialog(activity, activity.getString(R.string.install_orbot_),
                activity.getString(R.string.you_must_have_orbot),
                activity.getString(R.string.orbot_yes), activity.getString(R.string.orbot_no), uriMarket);
    }

    private static AlertDialog showDownloadDialog(final Activity activity,
            CharSequence stringTitle, CharSequence stringMessage, CharSequence stringButtonYes,
            CharSequence stringButtonNo, final String uriString) {
        AlertDialog.Builder downloadDialog = new AlertDialog.Builder(activity);
        downloadDialog.setTitle(stringTitle);
        downloadDialog.setMessage(stringMessage);
        downloadDialog.setPositiveButton(stringButtonYes, new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialogInterface, int i) {
                Uri uri = Uri.parse(uriString);
                Intent intent = new Intent(Intent.ACTION_VIEW, uri);
                activity.startActivity(intent);
            }
        });
        downloadDialog.setNegativeButton(stringButtonNo, new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialogInterface, int i) {
            }
        });
        return downloadDialog.show();
    }

    public void requestOrbotStart(final Activity activity)
    {

        AlertDialog.Builder downloadDialog = new AlertDialog.Builder(activity);
        downloadDialog.setTitle(R.string.start_orbot_);
        downloadDialog
                .setMessage(R.string.orbot_doesn_t_appear_to_be_running_would_you_like_to_start_it_up_and_connect_to_tor_);
        downloadDialog.setPositiveButton(R.string.orbot_yes, new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialogInterface, int i) {
                activity.startActivityForResult(getOrbotStartIntent(), 1);
            }
        });
        downloadDialog.setNegativeButton(R.string.orbot_no, new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialogInterface, int i) {
            }
        });
        downloadDialog.show();

    }

    public void requestHiddenServiceOnPort(Activity activity, int port)
    {
        Intent intent = new Intent(ACTION_REQUEST_HS);
        intent.setPackage(ORBOT_PACKAGE_NAME);
        intent.putExtra("hs_port", port);

        activity.startActivityForResult(intent, HS_REQUEST_CODE);
    }

    public static Intent getOrbotStartIntent() {
        Intent intent = new Intent(ACTION_START_TOR);
        intent.setPackage(ORBOT_PACKAGE_NAME);
        intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
        return intent;
    }
}