/*
 * Copyright (C) 2017 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.fuelgauge;

import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.icu.text.NumberFormat;
import android.os.BatteryManager;
import android.os.PowerManager;
import android.text.TextUtils;
import android.text.method.LinkMovementMethod;
import android.view.View;
import android.view.ViewGroup;
import android.widget.LinearLayout;
import android.widget.TextView;

import androidx.annotation.VisibleForTesting;
import androidx.preference.PreferenceFragmentCompat;
import androidx.preference.PreferenceScreen;

import com.android.settings.R;
import com.android.settings.core.BasePreferenceController;
import com.android.settings.core.PreferenceControllerMixin;
import com.android.settings.overlay.FeatureFactory;
import com.android.settings.utils.AnnotationSpan;
import com.android.settings.widget.EntityHeaderController;
import com.android.settingslib.HelpUtils;
import com.android.settingslib.Utils;
import com.android.settingslib.core.lifecycle.Lifecycle;
import com.android.settingslib.core.lifecycle.LifecycleObserver;
import com.android.settingslib.core.lifecycle.events.OnStart;
import com.android.settingslib.widget.LayoutPreference;

/**
 * Controller that update the battery header view
 */
public class BatteryHeaderPreferenceController extends BasePreferenceController
        implements PreferenceControllerMixin, LifecycleObserver, OnStart {
    @VisibleForTesting
    static final String KEY_BATTERY_HEADER = "battery_header";
    private static final String ANNOTATION_URL = "url";

    @VisibleForTesting
    BatteryStatusFeatureProvider mBatteryStatusFeatureProvider;
    @VisibleForTesting
    BatteryMeterView mBatteryMeterView;
    @VisibleForTesting
    TextView mBatteryPercentText;
    @VisibleForTesting
    TextView mSummary1;

    private Activity mActivity;
    private PreferenceFragmentCompat mHost;
    private Lifecycle mLifecycle;
    private final PowerManager mPowerManager;

    private LayoutPreference mBatteryLayoutPref;

    public BatteryHeaderPreferenceController(Context context, String key) {
        super(context, key);
        mPowerManager = context.getSystemService(PowerManager.class);
        mBatteryStatusFeatureProvider = FeatureFactory.getFactory(context)
                .getBatteryStatusFeatureProvider(context);
    }

    public void setActivity(Activity activity) {
        mActivity = activity;
    }

    public void setFragment(PreferenceFragmentCompat fragment) {
        mHost = fragment;
    }

    public void setLifecycle(Lifecycle lifecycle) {
        mLifecycle = lifecycle;
    }

    @Override
    public void displayPreference(PreferenceScreen screen) {
        super.displayPreference(screen);
        mBatteryLayoutPref = screen.findPreference(getPreferenceKey());
        mBatteryMeterView = mBatteryLayoutPref
                .findViewById(R.id.battery_header_icon);
        mBatteryPercentText = mBatteryLayoutPref.findViewById(R.id.battery_percent);
        mSummary1 = mBatteryLayoutPref.findViewById(R.id.summary1);

        if (com.android.settings.Utils.isBatteryPresent(mContext)) {
            quickUpdateHeaderPreference();
        } else {
            showHelpMessage();
        }
    }

    @Override
    public int getAvailabilityStatus() {
        return AVAILABLE_UNSEARCHABLE;
    }

    @Override
    public void onStart() {
        EntityHeaderController.newInstance(mActivity, mHost,
                mBatteryLayoutPref.findViewById(R.id.battery_entity_header))
                .setRecyclerView(mHost.getListView(), mLifecycle)
                .styleActionBar(mActivity);
    }

    public void updateHeaderPreference(BatteryInfo info) {
        mBatteryPercentText.setText(formatBatteryPercentageText(info.batteryLevel));
        if (!mBatteryStatusFeatureProvider.triggerBatteryStatusUpdate(this, info)) {
            if (BatteryUtils.isBatteryDefenderOn(info)) {
                mSummary1.setText(null);
            } else if (info.remainingLabel == null) {
                mSummary1.setText(info.statusLabel);
            } else {
                mSummary1.setText(info.remainingLabel);
            }
        }

        mBatteryMeterView.setBatteryLevel(info.batteryLevel);
        mBatteryMeterView.setCharging(!info.discharging);
        mBatteryMeterView.setPowerSave(mPowerManager.isPowerSaveMode());
    }

    /**
     * Callback which receives text for the summary line.
     */
    public void updateBatteryStatus(String statusLabel) {
        mSummary1.setText(statusLabel);
    }

    public void quickUpdateHeaderPreference() {
        Intent batteryBroadcast = mContext.registerReceiver(null,
                new IntentFilter(Intent.ACTION_BATTERY_CHANGED));
        final int batteryLevel = Utils.getBatteryLevel(batteryBroadcast);
        final boolean discharging =
                batteryBroadcast.getIntExtra(BatteryManager.EXTRA_PLUGGED, -1) == 0;

        // Set battery level and charging status
        mBatteryMeterView.setBatteryLevel(batteryLevel);
        mBatteryMeterView.setCharging(!discharging);
        mBatteryMeterView.setPowerSave(mPowerManager.isPowerSaveMode());
        mBatteryPercentText.setText(formatBatteryPercentageText(batteryLevel));
    }

    @VisibleForTesting
    void showHelpMessage() {
        final LinearLayout batteryInfoLayout =
                mBatteryLayoutPref.findViewById(R.id.battery_info_layout);
        // Remove battery meter icon
        mBatteryMeterView.setVisibility(View.GONE);
        // Update the width of battery info layout
        final ViewGroup.LayoutParams params = batteryInfoLayout.getLayoutParams();
        params.width = LinearLayout.LayoutParams.WRAP_CONTENT;
        batteryInfoLayout.setLayoutParams(params);
        mBatteryPercentText.setText(mContext.getText(R.string.unknown));
        // Add linkable text for learn more
        final Intent helpIntent = HelpUtils.getHelpIntent(mContext,
                mContext.getString(R.string.help_url_battery_missing),
                mContext.getClass().getName());
        final AnnotationSpan.LinkInfo linkInfo = new AnnotationSpan
                .LinkInfo(mContext, ANNOTATION_URL, helpIntent);
        if (linkInfo.isActionable()) {
            mSummary1.setMovementMethod(LinkMovementMethod.getInstance());
            mSummary1.setText(AnnotationSpan
                    .linkify(mContext.getText(R.string.battery_missing_help_message), linkInfo));
        } else {
            mSummary1.setText(mContext.getText(R.string.battery_missing_message));
        }
    }

    private CharSequence formatBatteryPercentageText(int batteryLevel) {
        return TextUtils.expandTemplate(mContext.getText(R.string.battery_header_title_alternate),
                NumberFormat.getIntegerInstance().format(batteryLevel));
    }
}