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/*
 * Copyright (C) 2015 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.qs.tiles;

import android.content.Intent;
import android.provider.Settings.Secure;
import android.service.quicksettings.Tile;
import android.widget.Switch;

import com.android.internal.logging.nano.MetricsProto.MetricsEvent;
import com.android.systemui.R;
import com.android.systemui.plugins.qs.QSTile.BooleanState;
import com.android.systemui.qs.QSHost;
import com.android.systemui.qs.SecureSetting;
import com.android.systemui.qs.tileimpl.QSTileImpl;
import com.android.systemui.statusbar.policy.BatteryController;

import javax.inject.Inject;

public class BatterySaverTile extends QSTileImpl<BooleanState> implements
        BatteryController.BatteryStateChangeCallback {

    private final BatteryController mBatteryController;
    private final SecureSetting mSetting;

    private int mLevel;
    private boolean mPowerSave;
    private boolean mCharging;
    private boolean mPluggedIn;

    private Icon mIcon = ResourceIcon.get(com.android.internal.R.drawable.ic_qs_battery_saver);

    @Inject
    public BatterySaverTile(QSHost host, BatteryController batteryController) {
        super(host);
        mBatteryController = batteryController;
        mBatteryController.observe(getLifecycle(), this);
        mSetting = new SecureSetting(mContext, mHandler, Secure.LOW_POWER_WARNING_ACKNOWLEDGED) {
            @Override
            protected void handleValueChanged(int value, boolean observedChange) {
                handleRefreshState(null);
            }
        };
    }

    @Override
    public BooleanState newTileState() {
        return new BooleanState();
    }

    @Override
    protected void handleDestroy() {
        super.handleDestroy();
        mSetting.setListening(false);
    }

    @Override
    public int getMetricsCategory() {
        return MetricsEvent.QS_BATTERY_TILE;
    }

    @Override
    public void handleSetListening(boolean listening) {
        mSetting.setListening(listening);
    }

    @Override
    public Intent getLongClickIntent() {
        return new Intent(Intent.ACTION_POWER_USAGE_SUMMARY);
    }

    @Override
    protected void handleClick() {
        if (getState().state == Tile.STATE_UNAVAILABLE) {
            return;
        }
        mBatteryController.setPowerSaveMode(!mPowerSave);
    }

    @Override
    public CharSequence getTileLabel() {
        return mContext.getString(R.string.battery_detail_switch_title);
    }

    @Override
    protected void handleUpdateState(BooleanState state, Object arg) {
        state.state = mPluggedIn ? Tile.STATE_UNAVAILABLE
                : mPowerSave ? Tile.STATE_ACTIVE : Tile.STATE_INACTIVE;
        state.icon = mIcon;
        state.label = mContext.getString(R.string.battery_detail_switch_title);
        state.contentDescription = state.label;
        state.value = mPowerSave;
        state.expandedAccessibilityClassName = Switch.class.getName();
        state.showRippleEffect = mSetting.getValue() == 0;
    }

    @Override
    public void onBatteryLevelChanged(int level, boolean pluggedIn, boolean charging) {
        mLevel = level;
        mPluggedIn = pluggedIn;
        mCharging = charging;
        refreshState(level);
    }

    @Override
    public void onPowerSaveChanged(boolean isPowerSave) {
        mPowerSave = isPowerSave;
        refreshState(null);
    }
}