/*  Copyright (C) 2023-2024 Frank Ertl

    This file is part of Gadgetbridge.

    Gadgetbridge is free software: you can redistribute it and/or modify
    it under the terms of the GNU Affero General Public License as published
    by the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    Gadgetbridge is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU Affero General Public License for more details.

    You should have received a copy of the GNU Affero General Public License
    along with this program.  If not, see <https://www.gnu.org/licenses/>. */
package nodomain.freeyourgadget.gadgetbridge.service.devices.withingssteelhr.communication.message.incoming;

import android.content.Context;
import android.content.pm.PackageManager;
import android.graphics.drawable.Drawable;
import android.widget.Toast;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.util.HashMap;
import java.util.Map;

import nodomain.freeyourgadget.gadgetbridge.model.NotificationSpec;
import nodomain.freeyourgadget.gadgetbridge.service.devices.withingssteelhr.IconHelper;
import nodomain.freeyourgadget.gadgetbridge.service.devices.withingssteelhr.WithingsSteelHRDeviceSupport;
import nodomain.freeyourgadget.gadgetbridge.service.devices.withingssteelhr.communication.datastructures.ImageData;
import nodomain.freeyourgadget.gadgetbridge.service.devices.withingssteelhr.communication.datastructures.ImageMetaData;
import nodomain.freeyourgadget.gadgetbridge.service.devices.withingssteelhr.communication.datastructures.SourceAppId;
import nodomain.freeyourgadget.gadgetbridge.service.devices.withingssteelhr.communication.message.Message;
import nodomain.freeyourgadget.gadgetbridge.service.devices.withingssteelhr.communication.message.WithingsMessage;
import nodomain.freeyourgadget.gadgetbridge.service.devices.withingssteelhr.communication.message.WithingsMessageType;
import nodomain.freeyourgadget.gadgetbridge.service.devices.withingssteelhr.communication.notification.NotificationProvider;
import nodomain.freeyourgadget.gadgetbridge.util.GB;

public class NotificationRequestHandler implements IncomingMessageHandler {
    private static final Logger logger = LoggerFactory.getLogger(NotificationRequestHandler.class);

    private final WithingsSteelHRDeviceSupport support;
    private Map<String, byte[]> appIconCache = new HashMap<>();

    public NotificationRequestHandler(WithingsSteelHRDeviceSupport support) {
        this.support = support;
    }

    @Override
    public void handleMessage(Message message) {
        try {
            SourceAppId appId = message.getStructureByType(SourceAppId.class);
            ImageMetaData imageMetaData = message.getStructureByType(ImageMetaData.class);
            Message reply = new WithingsMessage(WithingsMessageType.GET_NOTIFICATION);
            reply.addDataStructure(appId);
            reply.addDataStructure(imageMetaData);
            ImageData imageData = new ImageData();
            imageData.setImageData(getImageData(appId.getAppId()));
            reply.addDataStructure(imageData);
            logger.info("Sending reply to notification request: " + reply);
            support.sendToDevice(reply);
        } catch (Exception e) {
            logger.error("Failed to respond to notification request.", e);
            GB.toast("Failed to respond to notification request:" + e.getMessage(), Toast.LENGTH_LONG, GB.WARN);
        }
    }

    private byte[] getImageData(String sourceAppId) {
        byte[] imageData = appIconCache.get(sourceAppId);
        if (imageData == null) {
            NotificationSpec notificationSpec = NotificationProvider.getInstance(support).getNotificationSpecForSourceAppId(sourceAppId);
            if (notificationSpec != null) {
                int iconId = notificationSpec.iconId;
                try {
                    Drawable icon = null;
                    if (notificationSpec.iconId != 0) {
                        Context sourcePackageContext = support.getContext().createPackageContext(sourceAppId, 0);
                        icon = sourcePackageContext.getResources().getDrawable(notificationSpec.iconId);
                    }
                    if (icon == null) {
                        PackageManager pm = support.getContext().getPackageManager();
                        icon = pm.getApplicationIcon(sourceAppId);
                    }

                    imageData = IconHelper.getIconBytesFromDrawable(icon);
                    appIconCache.put(sourceAppId, imageData);
                } catch (PackageManager.NameNotFoundException e) {
                    logger.error("Error while updating notification icons", e);
                    imageData = new byte[0];
                }
            } else {
                imageData = new byte[0];
            }
        }

        return imageData;
    }
}