/*
 * Copyright 2022 Anton Tananaev (anton@traccar.org)
 *
 * 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 org.traccar.protocol;

import io.netty.channel.Channel;
import io.netty.handler.codec.http.FullHttpResponse;
import org.traccar.BasePipelineFactory;
import org.traccar.BaseProtocolDecoder;
import org.traccar.Protocol;

import javax.json.Json;
import javax.json.JsonObject;
import java.io.StringReader;
import java.net.SocketAddress;
import java.nio.charset.StandardCharsets;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.TimeZone;

public class OrbcommProtocolDecoder extends BaseProtocolDecoder {

    public OrbcommProtocolDecoder(Protocol protocol) {
        super(protocol);
    }

    @Override
    protected Object decode(
            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {

        FullHttpResponse response = (FullHttpResponse) msg;
        String content = response.content().toString(StandardCharsets.UTF_8);
        JsonObject json = Json.createReader(new StringReader(content)).readObject();

        if (channel != null) {
            OrbcommProtocolPoller poller =
                    BasePipelineFactory.getHandler(channel.pipeline(), OrbcommProtocolPoller.class);
            if (poller != null) {
                DateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
                dateFormat.setTimeZone(TimeZone.getTimeZone("UTC"));
                poller.setStartTime(dateFormat.parse(json.getString("NextStartUTC")));
            }
        }

        return null;
    }

}