/*
 * Copyright (C) 2016 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 android.car.settings;

import android.content.Context;
import android.database.ContentObserver;
import android.net.Uri;
import android.os.Handler;
import android.provider.Settings;

import java.lang.ref.WeakReference;

/**
 * A content observer for garage mode settings.
 * @hide
 */
public abstract class GarageModeSettingsObserver extends ContentObserver {

    public static final Uri GARAGE_MODE_ENABLED_URI =
            Settings.Global.getUriFor(CarSettings.Global.KEY_GARAGE_MODE_ENABLED);
    public static final Uri GARAGE_MODE_WAKE_UP_TIME_URI =
            Settings.Global.getUriFor(CarSettings.Global.KEY_GARAGE_MODE_WAKE_UP_TIME);
    public static final Uri GARAGE_MODE_MAINTENANCE_WINDOW_URI =
            Settings.Global.getUriFor(CarSettings.Global.KEY_GARAGE_MODE_MAINTENANCE_WINDOW);

    public static final Uri[] GARAGE_SETTING_URIS = {GARAGE_MODE_ENABLED_URI,
            GARAGE_MODE_WAKE_UP_TIME_URI, GARAGE_MODE_MAINTENANCE_WINDOW_URI};

    private final WeakReference<Context> mContext;

    public GarageModeSettingsObserver(Context context, Handler handler) {
        super(handler);
        mContext = new WeakReference<Context>(context);
    }

    public void register() {
        if (mContext.get() == null) {
            return;
        }
        for (Uri uri : GARAGE_SETTING_URIS) {
            mContext.get().getContentResolver().registerContentObserver(
                    uri, false, this);
        }
    }

    public void unregister() {
        if (mContext.get() == null) {
            return;
        }
        mContext.get().getContentResolver().unregisterContentObserver(this);
    }

}