/*
 * BRLTTY - A background process providing access to the console screen (when in
 *          text mode) for a blind person using a refreshable braille display.
 *
 * Copyright (C) 1995-2017 by The BRLTTY Developers.
 *
 * BRLTTY comes with ABSOLUTELY NO WARRANTY.
 *
 * This is free software, placed under the terms of the
 * GNU General Public License, as published by the Free Software
 * Foundation; either version 2 of the License, or (at your option) any
 * later version. Please see the file LICENSE-GPL for details.
 *
 * Web Page: http://brltty.com/
 *
 * This software is maintained by Dave Mielke <dave@mielke.cc>.
 */

package org.a11y.brltty.android;

import org.a11y.brltty.core.*;

import java.util.Arrays;
import java.util.Collections;
import java.util.Collection;
import java.util.List;
import java.util.ArrayList;
import java.util.Map;
import java.util.LinkedHashMap;
import java.util.Set;
import java.util.TreeSet;

import java.text.Collator;
import java.text.CollationKey;

import android.util.Log;
import android.os.Bundle;

import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;

import android.preference.PreferenceActivity;
import android.preference.PreferenceFragment;
import android.preference.PreferenceScreen;
import android.preference.Preference;
import android.preference.CheckBoxPreference;
import android.preference.EditTextPreference;
import android.preference.ListPreference;
import android.preference.MultiSelectListPreference;

import android.bluetooth.*;
import android.hardware.usb.*;

public class SettingsActivity extends PreferenceActivity {
  private static final String LOG_TAG = SettingsActivity.class.getName();

  public static <T> String[] makeStringArray (Collection<T> collection, StringMaker<T> stringMaker) {
    List<String> strings = new ArrayList<String>(collection.size());

    for (T element : collection) {
      strings.add(stringMaker.makeString(element));
    }

    return strings.toArray(new String[strings.size()]);
  }

  public static final String PREF_KEY_DEVICE_QUALIFIER = "device-qualifier-%1$s";
  public static final String PREF_KEY_DEVICE_REFERENCE = "device-reference-%1$s";
  public static final String PREF_KEY_DEVICE_DRIVER = "device-driver-%1$s";

  public static final String[] devicePropertyKeys = {
    PREF_KEY_DEVICE_QUALIFIER,
    PREF_KEY_DEVICE_REFERENCE,
    PREF_KEY_DEVICE_DRIVER
  };

  public static Map<String, String> getProperties (String owner, String[] keys, SharedPreferences prefs) {
    Map<String, String> properties = new LinkedHashMap();

    for (String key : keys) {
      properties.put(key, prefs.getString(String.format(key, owner), ""));
    }

    return properties;
  }

  public static void putProperties (String owner, Map<String, String> properties, SharedPreferences.Editor editor) {
    for (Map.Entry<String, String> property : properties.entrySet()) {
      editor.putString(String.format(property.getKey(), owner), property.getValue());
    }
  }

  public static void removeProperties (String owner, String[] keys, SharedPreferences.Editor editor) {
    for (String key : keys) {
      editor.remove(String.format(key, owner));
    }
  }

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

    setTitle(R.string.SETTINGS_SCREEN_MAIN);
  }

  @Override
  public void onBuildHeaders (List<Header> headers) {
    loadHeadersFromResource(R.xml.settings_headers, headers);
  }

  public static abstract class SettingsFragment extends PreferenceFragment {
    protected final String LOG_TAG = this.getClass().getName();

    private static Collator localeCollator = null;

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

    protected Preference getPreference (int key) {
      return findPreference(getResources().getString(key));
    }

    protected PreferenceScreen getPreferenceScreen (int key) {
      return (PreferenceScreen)getPreference(key);
    }

    protected CheckBoxPreference getCheckBoxPreference (int key) {
      return (CheckBoxPreference)getPreference(key);
    }

    protected EditTextPreference getEditTextPreference (int key) {
      return (EditTextPreference)getPreference(key);
    }

    protected ListPreference getListPreference (int key) {
      return (ListPreference)getPreference(key);
    }

    protected MultiSelectListPreference getMultiSelectListPreference (int key) {
      return (MultiSelectListPreference)getPreference(key);
    }

    protected boolean isChecked (Preference preference) {
      return ((CheckBoxPreference)preference).isChecked();
    }

    protected void showListSelection (ListPreference list) {
      CharSequence label = list.getEntry();

      if (label == null) {
        label = "";
      }

      list.setSummary(label);
    }

    protected void showListSelection (ListPreference list, int index) {
      list.setSummary(list.getEntries()[index]);
    }

    protected int getListIndex (ListPreference list, String value) {
      return Arrays.asList(list.getEntryValues()).indexOf(value);
    }

    protected void showListSelection (ListPreference list, String value) {
      showListSelection(list, getListIndex(list, value));
    }

    protected void showSetSelections (MultiSelectListPreference set, Set<String> values) {
      StringBuilder label = new StringBuilder();

      if (values.size() > 0) {
        CharSequence[] labels = set.getEntries();

        for (String value : values) {
          if (value.length() > 0) {
            if (label.length() > 0) {
              label.append('\n');
            }

            label.append(labels[set.findIndexOfValue(value)]);
          }
        }
      } else {
        label.append(getString(R.string.SET_SELECTION_NONE));
      }

      set.setSummary(label.toString());
    }

    protected void showSetSelections (MultiSelectListPreference set) {
      showSetSelections(set, set.getValues());
    }

    protected void resetList (ListPreference list) {
      list.setValueIndex(0);
      showListSelection(list);
    }

    protected void setListElements (ListPreference list, String[] values, String[] labels) {
      list.setEntryValues(values);
      list.setEntries(labels);
    }

    protected void setListElements (ListPreference list, String[] values) {
      setListElements(list, values, values);
    }

    protected void sortList (ListPreference list, int fromIndex) {
      if (localeCollator == null) {
        localeCollator = Collator.getInstance();
        localeCollator.setStrength(Collator.PRIMARY);
        localeCollator.setDecomposition(Collator.CANONICAL_DECOMPOSITION);
      }

      String[] values = LanguageUtilities.newStringArray(list.getEntryValues());
      String[] labels = LanguageUtilities.newStringArray(list.getEntries());

      int size = values.length;
      Map<String, String> map = new LinkedHashMap<String, String>();
      CollationKey keys[] = new CollationKey[size];

      for (int i=0; i<size; i+=1) {
        String label = labels[i];
        map.put(label, values[i]);
        keys[i] = localeCollator.getCollationKey(label);
      }

      Arrays.sort(keys, fromIndex, keys.length);

      for (int i=0; i<size; i+=1) {
        String label = keys[i].getSourceString();
        labels[i] = label;
        values[i] = map.get(label);
      }

      setListElements(list, values, labels);
    }

    protected void sortList (ListPreference list) {
      sortList(list, 0);
    }

    protected SharedPreferences getSharedPreferences () {
      return getPreferenceManager().getDefaultSharedPreferences(getActivity());
    }
  }

  public static final class GeneralSettings extends SettingsFragment {
    protected ListPreference navigationModeList;
    protected ListPreference textTableList;
    protected ListPreference contractionTableList;
    protected ListPreference speechSupportList;

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

      addPreferencesFromResource(R.xml.settings_general);

      navigationModeList = getListPreference(R.string.PREF_KEY_NAVIGATION_MODE);
      textTableList = getListPreference(R.string.PREF_KEY_TEXT_TABLE);
      contractionTableList = getListPreference(R.string.PREF_KEY_CONTRACTION_TABLE);
      speechSupportList = getListPreference(R.string.PREF_KEY_SPEECH_SUPPORT);

      sortList(textTableList, 1);
      sortList(contractionTableList);

      showListSelection(navigationModeList);
      showListSelection(textTableList);
      showListSelection(contractionTableList);
      showListSelection(speechSupportList);

      navigationModeList.setOnPreferenceChangeListener(
        new Preference.OnPreferenceChangeListener() {
          @Override
          public boolean onPreferenceChange (Preference preference, Object newValue) {
            final String newNavigationMode = (String)newValue;

            showListSelection(navigationModeList, newNavigationMode);
            BrailleRenderer.setBrailleRenderer(newNavigationMode);
            return true;
          }
        }
      );

      textTableList.setOnPreferenceChangeListener(
        new Preference.OnPreferenceChangeListener() {
          @Override
          public boolean onPreferenceChange (Preference preference, Object newValue) {
            final String newTextTable = (String)newValue;

            CoreWrapper.runOnCoreThread(new Runnable() {
              @Override
              public void run () {
                CoreWrapper.changeTextTable(newTextTable);
              }
            });

            showListSelection(textTableList, newTextTable);
            return true;
          }
        }
      );

      contractionTableList.setOnPreferenceChangeListener(
        new Preference.OnPreferenceChangeListener() {
          @Override
          public boolean onPreferenceChange (Preference preference, Object newValue) {
            final String newContractionTable = (String)newValue;

            CoreWrapper.runOnCoreThread(new Runnable() {
              @Override
              public void run () {
                CoreWrapper.changeContractionTable(newContractionTable);
              }
            });

            showListSelection(contractionTableList, newContractionTable);
            return true;
          }
        }
      );

      speechSupportList.setOnPreferenceChangeListener(
        new Preference.OnPreferenceChangeListener() {
          @Override
          public boolean onPreferenceChange (Preference preference, Object newValue) {
            final String newSpeechSupport = (String)newValue;

            CoreWrapper.runOnCoreThread(new Runnable() {
              @Override
              public void run () {
                CoreWrapper.changeSpeechDriver(newSpeechSupport);
                CoreWrapper.restartSpeechDriver();
              }
            });

            showListSelection(speechSupportList, newSpeechSupport);
            return true;
          }
        }
      );
    }
  }

  public static final class DeviceManager extends SettingsFragment {
    protected Set<String> deviceNames;
    protected DeviceCollection deviceCollection;

    protected ListPreference selectedDeviceList;
    protected PreferenceScreen addDeviceScreen;
    protected PreferenceScreen removeDeviceScreen;

    protected EditTextPreference deviceNameEditor;
    protected ListPreference deviceMethodList;
    protected ListPreference deviceIdentifierList;
    protected ListPreference deviceDriverList;
    protected Preference addDeviceButton;

    protected Preference removeDeviceButton_ASK;
    protected Preference removeDeviceButton_YES;
    protected Preference removeDeviceButton_NO;

    protected static final String PREF_KEY_DEVICE_NAMES = "device-names";

    private void updateRemoveDeviceScreen (String selectedDevice) {
      boolean on = false;

      if (selectedDeviceList.isEnabled()) {
        if (selectedDevice != null) {
          if (selectedDevice.length() > 0) {
            on = true;
            removeDeviceButton_ASK.setSummary(selectedDevice);
          }
        }
      }

      removeDeviceScreen.setSelectable(on);
    }

    private void updateRemoveDeviceScreen () {
      updateRemoveDeviceScreen(selectedDeviceList.getValue());
    }

    private void updateSelectedDeviceList () {
      boolean haveDevices = !deviceNames.isEmpty();
      selectedDeviceList.setEnabled(haveDevices);
      CharSequence summary;

      if (haveDevices) {
        {
          String[] names = new String[deviceNames.size()];
          deviceNames.toArray(names);
          setListElements(selectedDeviceList, names);
          sortList(selectedDeviceList);
        }

        summary = selectedDeviceList.getEntry();
        if ((summary == null) || (summary.length() == 0)) {
          summary = getString(R.string.SELECTED_DEVICE_UNSELECTED);
        }
      } else {
        summary = getString(R.string.SELECTED_DEVICE_NONE);
      }

      selectedDeviceList.setSummary(summary);
      updateRemoveDeviceScreen();
    }

    private String getDeviceMethod () {
      return deviceMethodList.getValue();
    }

    public interface DeviceCollection {
      public String[] getIdentifierValues ();
      public String[] getIdentifierLabels ();
      public String getMethodQualifier ();
      public String getDeviceReference (String identifier);
    }

    public static final class BluetoothDeviceCollection implements DeviceCollection {
      private final Collection<BluetoothDevice> devices;

      public BluetoothDeviceCollection (Context context) {
        BluetoothAdapter adapter = BluetoothAdapter.getDefaultAdapter();
        devices = (adapter != null)? adapter.getBondedDevices(): Collections.EMPTY_SET;
      }

      @Override
      public String[] getIdentifierValues () {
        StringMaker<BluetoothDevice> stringMaker = new StringMaker<BluetoothDevice>() {
          @Override
          public String makeString (BluetoothDevice device) {
            return device.getAddress();
          }
        };

        return makeStringArray(devices, stringMaker);
      }

      @Override
      public String[] getIdentifierLabels () {
        StringMaker<BluetoothDevice> stringMaker = new StringMaker<BluetoothDevice>() {
          @Override
          public String makeString (BluetoothDevice device) {
            return device.getName();
          }
        };

        return makeStringArray(devices, stringMaker);
      }

      @Override
      public String getMethodQualifier () {
        return "bluetooth";
      }

      @Override
      public String getDeviceReference (String identifier) {
        return "address=" + identifier;
      }
    }

    public static final class UsbDeviceCollection implements DeviceCollection {
      private final UsbManager manager;
      private final Map<String, UsbDevice> map;
      private final Collection<UsbDevice> devices;

      public UsbDeviceCollection (Context context) {
        manager = (UsbManager)context.getSystemService(Context.USB_SERVICE);
        map = manager.getDeviceList();
        devices = map.values();
      }

      @Override
      public String[] getIdentifierValues () {
        StringMaker<UsbDevice> stringMaker = new StringMaker<UsbDevice>() {
          @Override
          public String makeString (UsbDevice device) {
            return device.getDeviceName();
          }
        };

        return makeStringArray(devices, stringMaker);
      }

      @Override
      public String[] getIdentifierLabels () {
        StringMaker<UsbDevice> stringMaker = new StringMaker<UsbDevice>() {
          @Override
          public String makeString (UsbDevice device) {
            return String.format("%04X:%04X", device.getVendorId(), device.getProductId());
          }
        };

        return makeStringArray(devices, stringMaker);
      }

      @Override
      public String getMethodQualifier () {
        return "usb";
      }

      @Override
      public String getDeviceReference (String identifier) {
        UsbDevice device = map.get(identifier);
        UsbDeviceConnection connection = manager.openDevice(device);

        if (connection != null) {
          String serialNumber = connection.getSerial();
          connection.close();

          return String.format("vendorIdentifier=0X%04X+productIdentifier=0X%04X+serialNumber=%s",
                               device.getVendorId(), device.getProductId(), serialNumber);
        }

        return null;
      }
    }

    public static final class SerialDeviceCollection implements DeviceCollection {
      @Override
      public String[] getIdentifierValues () {
        return new String[0];
      }

      @Override
      public String[] getIdentifierLabels () {
        return new String[0];
      }

      @Override
      public String getMethodQualifier () {
        return "serial";
      }

      @Override
      public String getDeviceReference (String identifier) {
        return identifier;
      }
    }

    private DeviceCollection makeDeviceCollection (String deviceMethod) {
      String className = getClass().getName() + "$" + deviceMethod + "DeviceCollection";

      String[] argumentTypes = new String[] {
        "android.content.Context"
      };

      Object[] arguments = new Object[] {
        getActivity()
      };

      return (DeviceCollection)LanguageUtilities.newInstance(className, argumentTypes, arguments);
    }

    private void updateDeviceIdentifierList (String deviceMethod) {
      deviceCollection = makeDeviceCollection(deviceMethod);

      setListElements(
        deviceIdentifierList,
        deviceCollection.getIdentifierValues(), 
        deviceCollection.getIdentifierLabels()
      );

      sortList(deviceIdentifierList);

      {
        boolean haveIdentifiers = deviceIdentifierList.getEntryValues().length > 0;
        deviceIdentifierList.setEnabled(haveIdentifiers);

        if (haveIdentifiers) {
          resetList(deviceIdentifierList);
        } else {
          deviceIdentifierList.setSummary(getString(R.string.ADD_DEVICE_NO_DEVICES));
        }
      }

      resetList(deviceDriverList);
    }

    private void updateDeviceName (String name) {
      String problem;

      if (!deviceMethodList.isEnabled()) {
        problem = getString(R.string.ADD_DEVICE_UNSELECTED_METHOD);
      } else if (!deviceIdentifierList.isEnabled()) {
        problem = getString(R.string.ADD_DEVICE_UNSELECTED_DEVICE);
      } else if (!deviceDriverList.isEnabled()) {
        problem = getString(R.string.ADD_DEVICE_UNSELECTED_DRIVER);
      } else {
        if (name.length() == 0) {
          name = deviceDriverList.getSummary()
               + " " + deviceMethodList.getSummary()
               + " " + deviceIdentifierList.getSummary()
               ;
        }

        if (deviceNames.contains(name)) {
          problem = getString(R.string.ADD_DEVICE_DUPLICATE_NAME);
        } else {
          problem = "";
        }
      }

      addDeviceButton.setSummary(problem);
      addDeviceButton.setEnabled(problem.length() == 0);
      deviceNameEditor.setSummary(name);
    }

    private void updateDeviceName () {
      updateDeviceName(deviceNameEditor.getEditText().getText().toString());
    }

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

      addPreferencesFromResource(R.xml.settings_devices);

      selectedDeviceList = getListPreference(R.string.PREF_KEY_SELECTED_DEVICE);
      addDeviceScreen = getPreferenceScreen(R.string.PREF_KEY_ADD_DEVICE);
      removeDeviceScreen = getPreferenceScreen(R.string.PREF_KEY_REMOVE_DEVICE);

      deviceNameEditor = getEditTextPreference(R.string.PREF_KEY_DEVICE_NAME);
      deviceMethodList = getListPreference(R.string.PREF_KEY_DEVICE_METHOD);
      deviceIdentifierList = getListPreference(R.string.PREF_KEY_DEVICE_IDENTIFIER);
      deviceDriverList = getListPreference(R.string.PREF_KEY_DEVICE_DRIVER);
      addDeviceButton = getPreference(R.string.PREF_KEY_DEVICE_ADD);

      removeDeviceButton_ASK = getPreference(R.string.PREF_KEY_REMOVE_DEVICE_ASK);
      removeDeviceButton_YES = getPreference(R.string.PREF_KEY_REMOVE_DEVICE_YES);
      removeDeviceButton_NO = getPreference(R.string.PREF_KEY_REMOVE_DEVICE_NO);

      sortList(deviceDriverList, 1);

      {
        SharedPreferences prefs = getSharedPreferences();
        deviceNames = new TreeSet<String>(prefs.getStringSet(PREF_KEY_DEVICE_NAMES, Collections.EMPTY_SET));
      }

      updateSelectedDeviceList();
      showListSelection(deviceMethodList);
      updateDeviceIdentifierList(getDeviceMethod());
      updateDeviceName();

      selectedDeviceList.setOnPreferenceChangeListener(
        new Preference.OnPreferenceChangeListener() {
          @Override
          public boolean onPreferenceChange (Preference preference, Object newValue) {
            final String newSelectedDevice = (String)newValue;

            CoreWrapper.runOnCoreThread(new Runnable() {
              @Override
              public void run () {
                Map<String, String> properties = SettingsActivity.getProperties(
                  newSelectedDevice,
                  devicePropertyKeys,
                  ApplicationUtilities.getSharedPreferences()
                );

                String qualifier = properties.get(SettingsActivity.PREF_KEY_DEVICE_QUALIFIER);
                String reference = properties.get(SettingsActivity.PREF_KEY_DEVICE_REFERENCE);
                String driver = properties.get(SettingsActivity.PREF_KEY_DEVICE_DRIVER);

                CoreWrapper.changeBrailleDevice(qualifier, reference);
                CoreWrapper.changeBrailleDriver(driver);
                CoreWrapper.restartBrailleDriver();
              }
            });

            selectedDeviceList.setSummary(newSelectedDevice);
            updateRemoveDeviceScreen(newSelectedDevice);
            return true;
          }
        }
      );

      deviceNameEditor.setOnPreferenceChangeListener(
        new Preference.OnPreferenceChangeListener() {
          @Override
          public boolean onPreferenceChange (Preference preference, Object newValue) {
            final String newDeviceName = (String)newValue;

            updateDeviceName(newDeviceName);
            return true;
          }
        }
      );

      deviceMethodList.setOnPreferenceChangeListener(
        new Preference.OnPreferenceChangeListener() {
          @Override
          public boolean onPreferenceChange (Preference preference, Object newValue) {
            final String newDeviceMethod = (String)newValue;

            showListSelection(deviceMethodList, newDeviceMethod);
            updateDeviceIdentifierList(newDeviceMethod);
            updateDeviceName();
            return true;
          }
        }
      );

      deviceIdentifierList.setOnPreferenceChangeListener(
        new Preference.OnPreferenceChangeListener() {
          @Override
          public boolean onPreferenceChange (Preference preference, Object newValue) {
            final String newDeviceIdentifier = (String)newValue;

            showListSelection(deviceIdentifierList, newDeviceIdentifier);
            updateDeviceName();
            return true;
          }
        }
      );

      deviceDriverList.setOnPreferenceChangeListener(
        new Preference.OnPreferenceChangeListener() {
          @Override
          public boolean onPreferenceChange (Preference preference, Object newValue) {
            final String newDeviceDriver = (String)newValue;

            showListSelection(deviceDriverList, newDeviceDriver);
            updateDeviceName();
            return true;
          }
        }
      );

      addDeviceButton.setOnPreferenceClickListener(
        new Preference.OnPreferenceClickListener() {
          @Override
          public boolean onPreferenceClick (Preference preference) {
            String name = deviceNameEditor.getSummary().toString();
            deviceNames.add(name);
            updateSelectedDeviceList();
            updateDeviceName();

            {
              SharedPreferences.Editor editor = preference.getEditor();

              Map<String, String> properties = new LinkedHashMap();
              properties.put(PREF_KEY_DEVICE_QUALIFIER, deviceCollection.getMethodQualifier());
              properties.put(PREF_KEY_DEVICE_REFERENCE, deviceCollection.getDeviceReference(deviceIdentifierList.getValue()));
              properties.put(PREF_KEY_DEVICE_DRIVER, deviceDriverList.getValue());
              putProperties(name, properties, editor);

              editor.putStringSet(PREF_KEY_DEVICE_NAMES, deviceNames);
              editor.commit();
            }

            addDeviceScreen.getDialog().dismiss();
            return true;
          }
        }
      );

      removeDeviceButton_YES.setOnPreferenceClickListener(
        new Preference.OnPreferenceClickListener() {
          @Override
          public boolean onPreferenceClick (Preference preference) {
            String name = selectedDeviceList.getValue();

            if (name != null) {
              deviceNames.remove(name);
              selectedDeviceList.setValue("");
              updateSelectedDeviceList();
              updateDeviceName();

              {
                SharedPreferences.Editor editor = preference.getEditor();
                editor.putStringSet(PREF_KEY_DEVICE_NAMES, deviceNames);
                removeProperties(name, devicePropertyKeys, editor);
                editor.commit();
              }
            }

            removeDeviceScreen.getDialog().dismiss();
            return true;
          }
        }
      );

      removeDeviceButton_NO.setOnPreferenceClickListener(
        new Preference.OnPreferenceClickListener() {
          @Override
          public boolean onPreferenceClick (Preference preference) {
            removeDeviceScreen.getDialog().dismiss();
            return true;
          }
        }
      );
    }
  }

  public static final class AdvancedSettings extends SettingsFragment {
    protected ListPreference keyboardTableList;
    protected ListPreference attributesTableList;
    protected ListPreference logLevelList;
    protected MultiSelectListPreference logCategorySet;
    protected CheckBoxPreference logAccessibilityEventsCheckBox;
    protected CheckBoxPreference logRenderedScreenCheckBox;
    protected CheckBoxPreference logKeyboardEventsCheckBox;

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

      addPreferencesFromResource(R.xml.settings_advanced);

      keyboardTableList = getListPreference(R.string.PREF_KEY_KEYBOARD_TABLE);
      attributesTableList = getListPreference(R.string.PREF_KEY_ATTRIBUTES_TABLE);
      logLevelList = getListPreference(R.string.PREF_KEY_LOG_LEVEL);
      logCategorySet = getMultiSelectListPreference(R.string.PREF_KEY_LOG_CATEGORIES);
      logAccessibilityEventsCheckBox = getCheckBoxPreference(R.string.PREF_KEY_LOG_ACCESSIBILITY_EVENTS);
      logRenderedScreenCheckBox = getCheckBoxPreference(R.string.PREF_KEY_LOG_RENDERED_SCREEN);
      logKeyboardEventsCheckBox = getCheckBoxPreference(R.string.PREF_KEY_LOG_KEYBOARD_EVENTS);

      sortList(keyboardTableList);
      sortList(attributesTableList);

      showListSelection(keyboardTableList);
      showListSelection(attributesTableList);
      showListSelection(logLevelList);
      showSetSelections(logCategorySet);

      keyboardTableList.setOnPreferenceChangeListener(
        new Preference.OnPreferenceChangeListener() {
          @Override
          public boolean onPreferenceChange (Preference preference, Object newValue) {
            final String newKeyboardTable = (String)newValue;

            CoreWrapper.runOnCoreThread(new Runnable() {
              @Override
              public void run () {
                CoreWrapper.changeKeyboardTable(newKeyboardTable);
              }
            });

            showListSelection(keyboardTableList, newKeyboardTable);
            return true;
          }
        }
      );

      attributesTableList.setOnPreferenceChangeListener(
        new Preference.OnPreferenceChangeListener() {
          @Override
          public boolean onPreferenceChange (Preference preference, Object newValue) {
            final String newAttributesTable = (String)newValue;

            CoreWrapper.runOnCoreThread(new Runnable() {
              @Override
              public void run () {
                CoreWrapper.changeAttributesTable(newAttributesTable);
              }
            });

            showListSelection(attributesTableList, newAttributesTable);
            return true;
          }
        }
      );

      logLevelList.setOnPreferenceChangeListener(
        new Preference.OnPreferenceChangeListener() {
          @Override
          public boolean onPreferenceChange (Preference preference, Object newValue) {
            final String newLogLevel = (String)newValue;

            CoreWrapper.runOnCoreThread(new Runnable() {
              @Override
              public void run () {
                CoreWrapper.changeLogLevel(newLogLevel);
              }
            });

            showListSelection(logLevelList, newLogLevel);
            return true;
          }
        }
      );

      logCategorySet.setOnPreferenceChangeListener(
        new Preference.OnPreferenceChangeListener() {
          @Override
          public boolean onPreferenceChange (Preference preference, Object newValue) {
            final Set<String> newLogCategories = (Set<String>)newValue;

            CoreWrapper.runOnCoreThread(new Runnable() {
              @Override
              public void run () {
                CoreWrapper.changeLogCategories(newLogCategories);
              }
            });

            showSetSelections(logCategorySet, newLogCategories);
            return true;
          }
        }
      );

      logAccessibilityEventsCheckBox.setOnPreferenceClickListener(
        new Preference.OnPreferenceClickListener() {
          @Override
          public boolean onPreferenceClick (Preference preference) {
            ApplicationParameters.LOG_ACCESSIBILITY_EVENTS = isChecked(preference);
            return true;
          }
        }
      );

      logRenderedScreenCheckBox.setOnPreferenceClickListener(
        new Preference.OnPreferenceClickListener() {
          @Override
          public boolean onPreferenceClick (Preference preference) {
            ApplicationParameters.LOG_RENDERED_SCREEN = isChecked(preference);
            return true;
          }
        }
      );

      logKeyboardEventsCheckBox.setOnPreferenceClickListener(
        new Preference.OnPreferenceClickListener() {
          @Override
          public boolean onPreferenceClick (Preference preference) {
            ApplicationParameters.LOG_KEYBOARD_EVENTS = isChecked(preference);
            return true;
          }
        }
      );
    }
  }
}
