/*
 * Copyright (C) 2008 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package de.blinkt.openvpn;

import java.util.Collection;
import java.util.Vector;

import android.app.Activity;
import android.app.AlertDialog;
import android.app.ListActivity;
import android.content.DialogInterface;
import android.content.Intent;
import android.net.VpnService;
import android.os.Bundle;
import android.os.Parcelable;
import android.view.View;
import android.view.inputmethod.EditorInfo;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ArrayAdapter;
import android.widget.EditText;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;

/**
 * This Activity actually handles two stages of a launcher shortcut's life cycle.
 * 
 * 1. Your application offers to provide shortcuts to the launcher.  When
 *    the user installs a shortcut, an activity within your application
 *    generates the actual shortcut and returns it to the launcher, where it
 *    is shown to the user as an icon.
 *
 * 2. Any time the user clicks on an installed shortcut, an intent is sent.
 *    Typically this would then be handled as necessary by an activity within
 *    your application.
 *    
 * We handle stage 1 (creating a shortcut) by simply sending back the information (in the form
 * of an {@link android.content.Intent} that the launcher will use to create the shortcut.
 * 
 * You can also implement this in an interactive way, by having your activity actually present
 * UI for the user to select the specific nature of the shortcut, such as a contact, picture, URL,
 * media item, or action.
 * 
 * We handle stage 2 (responding to a shortcut) in this sample by simply displaying the contents
 * of the incoming {@link android.content.Intent}.
 * 
 * In a real application, you would probably use the shortcut intent to display specific content
 * or start a particular operation.
 */
public class LaunchVPN extends ListActivity implements OnItemClickListener {

	static final String EXTRA_KEY = "de.blinkt.openvpn.shortcutProfileUUID";
	private static final int START_VPN_PROFILE= 70;

	private ProfileManager mPM;
	private VpnProfile mSelectedProfile;

    @Override
    public void onCreate(Bundle icicle) {
        super.onCreate(icicle);

        // Resolve the intent

        final Intent intent = getIntent();
        final String action = intent.getAction();
        
        mPM =ProfileManager.getInstance();
        if(mPM.getNumberOfProfiles() == 0) {
        	mPM.loadVPNList(this);
        }
        

        // If the intent is a request to create a shortcut, we'll do that and exit

		if(Intent.ACTION_MAIN.equals(action)) {
			// we got called to be the starting point, most likely a shortcut
			String shortcutUUID = intent.getStringExtra( EXTRA_KEY);
			
			VpnProfile profileToConnect = ProfileManager.get(shortcutUUID);
			if(profileToConnect ==null) {
				Toast notfound = Toast.makeText(this, R.string.shortcut_profile_notfound, Toast.LENGTH_SHORT);
				notfound.show();
				finish();
				return;
			}
			
			mSelectedProfile = profileToConnect;
			launchVPN();
			
			
			
		} else if (Intent.ACTION_CREATE_SHORTCUT.equals(action)) {
			createListView();
		}
		
          
        
        
		  
		  

    }

    private void createListView() {
        ListView lv = getListView();
		  //lv.setTextFilterEnabled(true);
        
        Collection<VpnProfile> vpnlist = mPM.getProfiles();
        
        Vector<String> vpnnames=new Vector<String>();
        for (VpnProfile vpnProfile : vpnlist) {
        	vpnnames.add(vpnProfile.mName);
		}
        
        
        
		  ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,android.R.layout.simple_list_item_1,vpnnames);
		  lv.setAdapter(adapter);
        
		  lv.setOnItemClickListener(this);
	}

	/**
     * This function creates a shortcut and returns it to the caller.  There are actually two 
     * intents that you will send back.
     * 
     * The first intent serves as a container for the shortcut and is returned to the launcher by 
     * setResult().  This intent must contain three fields:
     * 
     * <ul>
     * <li>{@link android.content.Intent#EXTRA_SHORTCUT_INTENT} The shortcut intent.</li>
     * <li>{@link android.content.Intent#EXTRA_SHORTCUT_NAME} The text that will be displayed with
     * the shortcut.</li>
     * <li>{@link android.content.Intent#EXTRA_SHORTCUT_ICON} The shortcut's icon, if provided as a
     * bitmap, <i>or</i> {@link android.content.Intent#EXTRA_SHORTCUT_ICON_RESOURCE} if provided as
     * a drawable resource.</li>
     * </ul>
     * 
     * If you use a simple drawable resource, note that you must wrapper it using
     * {@link android.content.Intent.ShortcutIconResource}, as shown below.  This is required so
     * that the launcher can access resources that are stored in your application's .apk file.  If 
     * you return a bitmap, such as a thumbnail, you can simply put the bitmap into the extras 
     * bundle using {@link android.content.Intent#EXTRA_SHORTCUT_ICON}.
     * 
     * The shortcut intent can be any intent that you wish the launcher to send, when the user 
     * clicks on the shortcut.  Typically this will be {@link android.content.Intent#ACTION_VIEW} 
     * with an appropriate Uri for your content, but any Intent will work here as long as it 
     * triggers the desired action within your Activity.
     * @param profile 
     */
    private void setupShortcut(VpnProfile profile) {
        // First, set up the shortcut intent.  For this example, we simply create an intent that
        // will bring us directly back to this activity.  A more typical implementation would use a 
        // data Uri in order to display a more specific result, or a custom action in order to 
        // launch a specific operation.

        Intent shortcutIntent = new Intent(Intent.ACTION_MAIN);
        shortcutIntent.setClass(this, LaunchVPN.class);
        shortcutIntent.putExtra(EXTRA_KEY,profile.getUUID().toString());

        // Then, set up the container intent (the response to the caller)

        Intent intent = new Intent();
        intent.putExtra(Intent.EXTRA_SHORTCUT_INTENT, shortcutIntent);
        intent.putExtra(Intent.EXTRA_SHORTCUT_NAME, profile.getName());
        Parcelable iconResource = Intent.ShortcutIconResource.fromContext(
                this,  R.drawable.icon);
        intent.putExtra(Intent.EXTRA_SHORTCUT_ICON_RESOURCE, iconResource);

        // Now, return the result to the launcher

        setResult(RESULT_OK, intent);
    }
    

	@Override
	public void onItemClick(AdapterView<?> parent, View view, int position,
			long id) {
		 String profilename = ((TextView) view).getText().toString();
		 
		 VpnProfile profile = mPM.getProfileByName(profilename);

	      // if (Intent.ACTION_CREATE_SHORTCUT.equals(action)) {	
	            setupShortcut(profile);
	            finish();
	            return;
	    //    }
		 
	}
	
	private void askForPW(final String type) {

		final EditText entry = new EditText(this);
		entry.setSingleLine();
		entry.setInputType(EditorInfo.TYPE_TEXT_VARIATION_PASSWORD);

		AlertDialog.Builder dialog = new AlertDialog.Builder(this);
		dialog.setTitle("Need " + type);
		dialog.setMessage("Enter the password for profile " + mSelectedProfile.mName);
		dialog.setView(entry);

		dialog.setPositiveButton(android.R.string.ok,
				new DialogInterface.OnClickListener() {
			@Override
			public void onClick(DialogInterface dialog, int which) {
				String pw = entry.getText().toString();
				if(type.equals("Password")) {
					mSelectedProfile.mTransientPW = pw;
				} else {
					mSelectedProfile.mTransientPCKS12PW = pw;
				}
				onActivityResult(START_VPN_PROFILE, Activity.RESULT_OK, null);

			}

		});
		dialog.setNegativeButton(android.R.string.cancel,
				new DialogInterface.OnClickListener() {
			@Override
			public void onClick(DialogInterface dialog, int which) {
				finish();
			}
		});

		dialog.create().show();

	}
	@Override
	protected void onActivityResult(int requestCode, int resultCode, Intent data) {
		super.onActivityResult(requestCode, resultCode, data);
		
		if(requestCode==START_VPN_PROFILE && resultCode == Activity.RESULT_OK) {
			
			if(mSelectedProfile.needUserPWInput()!=null) {
				askForPW(mSelectedProfile.needUserPWInput());
			} else {
				new startOpenVpnThread().start();
			}

		} 
	}

	void showConfigErrorDialog(int vpnok) {
		AlertDialog.Builder d = new AlertDialog.Builder(this);
		d.setTitle(R.string.config_error_found);
		d.setMessage(vpnok);
		d.setPositiveButton(android.R.string.ok, null);
		d.show();
	}
	
	void launchVPN () {
		
		
		int vpnok = mSelectedProfile.checkProfile();
		if(vpnok!= R.string.no_error_found) {
			showConfigErrorDialog(vpnok);
			return;
		}

		Intent intent = VpnService.prepare(this);

		if (intent != null) {
			// Start the query
			startActivityForResult(intent, START_VPN_PROFILE);
		} else {
			onActivityResult(START_VPN_PROFILE, Activity.RESULT_OK, null);
		}
		
	}
	
	private class startOpenVpnThread extends Thread {

		@Override
		public void run() {
			startOpenVpn();
		}

		void startOpenVpn() {
			Intent startLW = new Intent(getBaseContext(),LogWindow.class);
			startActivity(startLW);


			OpenVPN.logMessage(0, "", "Building configration...");

			Intent startVPN = mSelectedProfile.prepareIntent(getBaseContext());

			startService(startVPN);
			finish();

		}
	}

	
}