/*
 * Copyright (C) 2011 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 com.android.settings.location;

import android.app.ActionBar;
import android.app.Activity;
import android.content.Intent;
import android.preference.Preference;
import android.preference.PreferenceActivity;
import android.preference.PreferenceScreen;
import android.util.Log;
import android.view.Gravity;
import android.widget.Switch;

import com.android.settings.R;
import com.android.settings.SettingsPreferenceFragment;

/**
 * Location access settings.
 */
public class LocationSettings extends SettingsPreferenceFragment
        implements Preference.OnPreferenceChangeListener {
    private static final String TAG = LocationSettings.class.getSimpleName();
    private static final String KEY_LOCATION_MODE = "location_mode";

    private PreferenceScreen mLocationMode;
    private LocationEnabler mLocationEnabler;

    @Override
    public void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        createPreferenceHierarchy();
    }

    @Override
    public void onResume() {
        super.onResume();

        // Make sure we reload the preference hierarchy since some of these settings
        // depend on others...
        createPreferenceHierarchy();
    }

    private PreferenceScreen createPreferenceHierarchy() {
        PreferenceScreen root = getPreferenceScreen();
        if (root != null) {
            root.removeAll();
        }
        addPreferencesFromResource(R.xml.location_settings);
        root = getPreferenceScreen();

        mLocationMode = (PreferenceScreen) root.findPreference((KEY_LOCATION_MODE));
        mLocationMode.setOnPreferenceClickListener(
                new Preference.OnPreferenceClickListener() {
                    @Override
                    public boolean onPreferenceClick(Preference preference) {
                        PreferenceActivity preferenceActivity =
                                (PreferenceActivity) getActivity();
                        preferenceActivity.startPreferencePanel(
                                LocationMode.class.getName(), null,
                                R.string.location_mode_screen_title, null, LocationSettings.this,
                                0);
                        return true;
                    }
                });

        Activity activity = getActivity();
        Switch actionBarSwitch = new Switch(activity);

        if (activity instanceof PreferenceActivity) {
            PreferenceActivity preferenceActivity = (PreferenceActivity) activity;
            // Only show the master switch when we're not in multi-pane mode, and not being used as
            // Setup Wizard.
            if (preferenceActivity.onIsHidingHeaders() || !preferenceActivity.onIsMultiPane()) {
                final int padding = activity.getResources().getDimensionPixelSize(
                        R.dimen.action_bar_switch_padding);
                actionBarSwitch.setPaddingRelative(0, 0, padding, 0);
                activity.getActionBar().setDisplayOptions(ActionBar.DISPLAY_SHOW_CUSTOM,
                        ActionBar.DISPLAY_SHOW_CUSTOM);
                activity.getActionBar().setCustomView(actionBarSwitch, new ActionBar.LayoutParams(
                        ActionBar.LayoutParams.WRAP_CONTENT,
                        ActionBar.LayoutParams.WRAP_CONTENT,
                        Gravity.CENTER_VERTICAL | Gravity.END));
            }
        } else {
            Log.wtf(TAG, "Current activity is not an instance of PreferenceActivity!");
        }

        mLocationEnabler = new LocationEnabler(activity, actionBarSwitch);
        setHasOptionsMenu(true);

        return root;
    }

    @Override
    public int getHelpResource() {
        return R.string.help_url_location_access;
    }

    @Override
    public boolean onPreferenceChange(Preference preference, Object newValue) {
      return true;
    }
}