/*
 * Copyright (C) 2010 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.systemui.statusbar.policy;

import com.android.systemui.DemoMode;

import java.io.FileDescriptor;
import java.io.PrintWriter;

public interface BatteryController extends DemoMode {
    /**
     * Prints the current state of the {@link BatteryController} to the given {@link PrintWriter}.
     */
    void dump(FileDescriptor fd, PrintWriter pw, String[] args);

    /**
     * Sets if the current device is in power save mode.
     */
    void setPowerSaveMode(boolean powerSave);

    /**
     * Returns {@code true} if the device is currently in power save mode.
     */
    boolean isPowerSave();

    void addStateChangedCallback(BatteryStateChangeCallback cb);
    void removeStateChangedCallback(BatteryStateChangeCallback cb);

    /**
     * A listener that will be notified whenever a change in battery level or power save mode
     * has occurred.
     */
    interface BatteryStateChangeCallback {
        void onBatteryLevelChanged(int level, boolean pluggedIn, boolean charging);
        void onPowerSaveChanged(boolean isPowerSave);
    }
}