/*
   Application Settings Activity

   Copyright 2013 Thincast Technologies GmbH, Author: Martin Fleisz

   This Source Code Form is subject to the terms of the Mozilla Public License, v. 2.0.
   If a copy of the MPL was not distributed with this file, You can obtain one at
   http://mozilla.org/MPL/2.0/.
*/

package com.freerdp.freerdpcore.presentation;

import android.annotation.TargetApi;
import android.content.Context;
import android.content.DialogInterface;
import android.content.SharedPreferences;
import android.content.res.Configuration;
import android.os.Build;
import android.os.Bundle;
import android.preference.EditTextPreference;
import android.preference.Preference;
import android.preference.PreferenceFragment;
import android.preference.PreferenceManager;
import android.preference.PreferenceScreen;
import android.support.v7.app.AlertDialog;
import android.widget.Toast;

import com.freerdp.freerdpcore.R;
import com.freerdp.freerdpcore.utils.AppCompatPreferenceActivity;

import java.io.File;
import java.util.List;
import java.util.UUID;

public class ApplicationSettingsActivity extends AppCompatPreferenceActivity
{
	private static boolean isXLargeTablet(Context context)
	{
		return (context.getResources().getConfiguration().screenLayout &
		        Configuration.SCREENLAYOUT_SIZE_MASK) >= Configuration.SCREENLAYOUT_SIZE_XLARGE;
	}

	@Override protected void onCreate(Bundle savedInstanceState)
	{
		super.onCreate(savedInstanceState);
		setupActionBar();
	}

	private void setupActionBar()
	{
		android.app.ActionBar actionBar = getActionBar();
		if (actionBar != null)
		{
			actionBar.setDisplayHomeAsUpEnabled(true);
		}
	}

	@Override public boolean onIsMultiPane()
	{
		return isXLargeTablet(this);
	}

	@Override
	@TargetApi(Build.VERSION_CODES.HONEYCOMB)
	public void onBuildHeaders(List<Header> target)
	{
		loadHeadersFromResource(R.xml.settings_app_headers, target);
	}

	protected boolean isValidFragment(String fragmentName)
	{
		return PreferenceFragment.class.getName().equals(fragmentName) ||
		    ClientPreferenceFragment.class.getName().equals(fragmentName) ||
		    UiPreferenceFragment.class.getName().equals(fragmentName) ||
		    PowerPreferenceFragment.class.getName().equals(fragmentName) ||
		    SecurityPreferenceFragment.class.getName().equals(fragmentName);
	}

	@TargetApi(Build.VERSION_CODES.HONEYCOMB)
	public static class ClientPreferenceFragment
	    extends PreferenceFragment implements SharedPreferences.OnSharedPreferenceChangeListener
	{
		@Override public void onCreate(Bundle savedInstanceState)
		{
			super.onCreate(savedInstanceState);
			addPreferencesFromResource(R.xml.settings_app_client);
			SharedPreferences preferences = get(getActivity());
			preferences.registerOnSharedPreferenceChangeListener(this);
		}

		@Override
		public void onSharedPreferenceChanged(SharedPreferences sharedPreferences, String key)
		{
			if (isAdded())
			{
				final String clientNameKey = getString(R.string.preference_key_client_name);

				get(getActivity());
				if (key.equals(clientNameKey))
				{
					final String clientNameValue = sharedPreferences.getString(clientNameKey, "");
					EditTextPreference pref = (EditTextPreference)findPreference(clientNameKey);
					pref.setText(clientNameValue);
				}
			}
		}
	}

	@TargetApi(Build.VERSION_CODES.HONEYCOMB)
	public static class UiPreferenceFragment extends PreferenceFragment
	{
		@Override public void onCreate(Bundle savedInstanceState)
		{
			super.onCreate(savedInstanceState);
			addPreferencesFromResource(R.xml.settings_app_ui);
		}
	}

	@TargetApi(Build.VERSION_CODES.HONEYCOMB)
	public static class PowerPreferenceFragment extends PreferenceFragment
	{
		@Override public void onCreate(Bundle savedInstanceState)
		{
			super.onCreate(savedInstanceState);
			addPreferencesFromResource(R.xml.settings_app_power);
		}
	}

	@TargetApi(Build.VERSION_CODES.HONEYCOMB)
	public static class SecurityPreferenceFragment extends PreferenceFragment
	{
		@Override public void onCreate(Bundle savedInstanceState)
		{
			super.onCreate(savedInstanceState);
			addPreferencesFromResource(R.xml.settings_app_security);
		}

		@Override
		public boolean onPreferenceTreeClick(PreferenceScreen preferenceScreen,
		                                     Preference preference)
		{
			final String clear =
			    getString(R.string.preference_key_security_clear_certificate_cache);
			if (preference.getKey().equals(clear))
			{
				showDialog();
				return true;
			}
			else
			{
				return super.onPreferenceTreeClick(preferenceScreen, preference);
			}
		}

		private void showDialog()
		{
			new AlertDialog.Builder(getActivity())
			    .setTitle(R.string.dlg_title_clear_cert_cache)
			    .setMessage(R.string.dlg_msg_clear_cert_cache)
			    .setPositiveButton(android.R.string.ok,
			                       new DialogInterface.OnClickListener() {
				                       @Override
				                       public void onClick(DialogInterface dialog, int which)
				                       {
					                       clearCertificateCache();
					                       dialog.dismiss();
				                       }
			                       })
			    .setNegativeButton(android.R.string.cancel,
			                       new DialogInterface.OnClickListener() {
				                       @Override
				                       public void onClick(DialogInterface dialog, int which)
				                       {
					                       dialog.dismiss();
				                       }
			                       })
			    .setIcon(android.R.drawable.ic_delete)
			    .show();
		}

		private boolean deleteDirectory(File dir)
		{
			if (dir.isDirectory())
			{
				String[] children = dir.list();
				for (String file : children)
				{
					if (!deleteDirectory(new File(dir, file)))
						return false;
				}
			}
			return dir.delete();
		}

		private void clearCertificateCache()
		{
			Context context = getActivity();
			if ((new File(context.getFilesDir() + "/.freerdp")).exists())
			{
				if (deleteDirectory(new File(context.getFilesDir() + "/.freerdp")))
					Toast.makeText(context, R.string.info_reset_success, Toast.LENGTH_LONG).show();
				else
					Toast.makeText(context, R.string.info_reset_failed, Toast.LENGTH_LONG).show();
			}
			else
				Toast.makeText(context, R.string.info_reset_success, Toast.LENGTH_LONG).show();
		}
	}

	public static SharedPreferences get(Context context)
	{
		Context appContext = context.getApplicationContext();
		PreferenceManager.setDefaultValues(appContext, R.xml.settings_app_client, false);
		PreferenceManager.setDefaultValues(appContext, R.xml.settings_app_power, false);
		PreferenceManager.setDefaultValues(appContext, R.xml.settings_app_security, false);
		PreferenceManager.setDefaultValues(appContext, R.xml.settings_app_ui, false);
		SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(appContext);

		final String key = context.getString(R.string.preference_key_client_name);
		final String value = preferences.getString(key, "");
		if (value.isEmpty())
		{
			final String android_id = UUID.randomUUID().toString();
			final String defaultValue = context.getString(R.string.preference_default_client_name);
			final String name = defaultValue + "-" + android_id;
			preferences.edit().putString(key, name.substring(0, 31)).apply();
		}

		return preferences;
	}

	public static int getDisconnectTimeout(Context context)
	{
		SharedPreferences preferences = get(context);
		return preferences.getInt(
		    context.getString(R.string.preference_key_power_disconnect_timeout), 0);
	}

	public static boolean getHideStatusBar(Context context)
	{
		SharedPreferences preferences = get(context);
		return preferences.getBoolean(context.getString(R.string.preference_key_ui_hide_status_bar),
		                              false);
	}

	public static boolean getHideActionBar(Context context)
	{
		SharedPreferences preferences = get(context);
		return preferences.getBoolean(context.getString(R.string.preference_key_ui_hide_action_bar),
		                              false);
	}

	public static boolean getAcceptAllCertificates(Context context)
	{
		SharedPreferences preferences = get(context);
		return preferences.getBoolean(
		    context.getString(R.string.preference_key_accept_certificates), false);
	}

	public static boolean getHideZoomControls(Context context)
	{
		SharedPreferences preferences = get(context);
		return preferences.getBoolean(
		    context.getString(R.string.preference_key_ui_hide_zoom_controls), false);
	}

	public static boolean getSwapMouseButtons(Context context)
	{
		SharedPreferences preferences = get(context);
		return preferences.getBoolean(
		    context.getString(R.string.preference_key_ui_swap_mouse_buttons), false);
	}

	public static boolean getInvertScrolling(Context context)
	{
		SharedPreferences preferences = get(context);
		return preferences.getBoolean(
		    context.getString(R.string.preference_key_ui_invert_scrolling), false);
	}

	public static boolean getAskOnExit(Context context)
	{
		SharedPreferences preferences = get(context);
		return preferences.getBoolean(context.getString(R.string.preference_key_ui_ask_on_exit),
		                              false);
	}

	public static boolean getAutoScrollTouchPointer(Context context)
	{
		SharedPreferences preferences = get(context);
		return preferences.getBoolean(
		    context.getString(R.string.preference_key_ui_auto_scroll_touchpointer), false);
	}

	public static String getClientName(Context context)
	{
		SharedPreferences preferences = get(context);
		return preferences.getString(context.getString(R.string.preference_key_client_name), "");
	}
}