/*
 * Copyright (c) 2010-2026 Contributors to the openHAB project
 *
 * See the NOTICE file(s) distributed with this work for additional
 * information.
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License 2.0 which is available at
 * http://www.eclipse.org/legal/epl-2.0
 *
 * SPDX-License-Identifier: EPL-2.0
 */
package org.openhab.binding.matter.internal.controller.devices.converter;

import static org.openhab.binding.matter.internal.MatterBindingConstants.CHANNEL_HUMIDITYMEASURMENT_MEASUREDVALUE;
import static org.openhab.binding.matter.internal.MatterBindingConstants.CHANNEL_ID_HUMIDITYMEASURMENT_MEASUREDVALUE;

import java.math.BigDecimal;
import java.util.Collections;
import java.util.Map;

import javax.measure.quantity.Dimensionless;

import org.eclipse.jdt.annotation.NonNullByDefault;
import org.eclipse.jdt.annotation.Nullable;
import org.openhab.binding.matter.internal.client.dto.cluster.gen.RelativeHumidityMeasurementCluster;
import org.openhab.binding.matter.internal.client.dto.ws.AttributeChangedMessage;
import org.openhab.binding.matter.internal.handler.MatterBaseThingHandler;
import org.openhab.core.library.types.QuantityType;
import org.openhab.core.library.unit.Units;
import org.openhab.core.thing.Channel;
import org.openhab.core.thing.ChannelGroupUID;
import org.openhab.core.thing.ChannelUID;
import org.openhab.core.thing.binding.builder.ChannelBuilder;
import org.openhab.core.types.StateDescription;

/**
 * A converter for translating {@link RelativeHumidityMeasurementCluster} events and attributes to openHAB channels and
 * back again.
 *
 * @author Dan Cunningham - Initial contribution
 */
@NonNullByDefault
public class RelativeHumidityMeasurementConverter extends GenericConverter<RelativeHumidityMeasurementCluster> {

    public RelativeHumidityMeasurementConverter(RelativeHumidityMeasurementCluster cluster,
            MatterBaseThingHandler handler, int endpointNumber, String labelPrefix) {
        super(cluster, handler, endpointNumber, labelPrefix);
    }

    @Override
    public Map<Channel, @Nullable StateDescription> createChannels(ChannelGroupUID channelGroupUID) {
        Channel channel = ChannelBuilder
                .create(new ChannelUID(channelGroupUID, CHANNEL_ID_HUMIDITYMEASURMENT_MEASUREDVALUE),
                        "Number:Dimensionless")
                .withType(CHANNEL_HUMIDITYMEASURMENT_MEASUREDVALUE).build();
        return Collections.singletonMap(channel, null);
    }

    @Override
    public void onEvent(AttributeChangedMessage message) {
        switch (message.path.attributeName) {
            case RelativeHumidityMeasurementCluster.ATTRIBUTE_MEASURED_VALUE:
                if (message.value instanceof Number number) {
                    updateState(CHANNEL_ID_HUMIDITYMEASURMENT_MEASUREDVALUE, humidityToPercent(number));
                }
                break;
        }
        super.onEvent(message);
    }

    @Override
    public void initState() {
        updateState(CHANNEL_ID_HUMIDITYMEASURMENT_MEASUREDVALUE, humidityToPercent(initializingCluster.measuredValue));
    }

    private QuantityType<Dimensionless> humidityToPercent(Number number) {
        return new QuantityType<>(BigDecimal.valueOf(number.intValue(), 2), Units.PERCENT);
    }
}
