/*
    * Copyright 2016 The Lannister 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 net.anyflow.lannister.message;
  
  import java.io.IOException;
  
  import com.fasterxml.jackson.annotation.JsonIgnore;
  import com.fasterxml.jackson.annotation.JsonProperty;
  import com.hazelcast.nio.ObjectDataInput;
  import com.hazelcast.nio.ObjectDataOutput;
  
  import io.netty.handler.codec.mqtt.MqttPublishMessage;
  import io.netty.handler.codec.mqtt.MqttQoS;
  import io.netty.util.CharsetUtil;
  import io.netty.util.internal.StringUtil;
  import net.anyflow.lannister.NettyUtil;
  import net.anyflow.lannister.plugin.IMessage;
  import net.anyflow.lannister.serialization.SerializableFactory;
  
  public class Message implements com.hazelcast.nio.serialization.IdentifiedDataSerializable, IMessage, Cloneable {
  	public final static Messages NEXUS = new Messages();
  	public final static int ID = 1;
  
  	public static final int MAX_MESSAGE_ID_NUM = 0xffff;
  	public static final int MIN_MESSAGE_ID_NUM = 1;
  
  	@JsonProperty
  	private int id;
  	@JsonProperty
  	private String topicName;
  	@JsonProperty
  	private String publisherId;
  	@JsonProperty
  	private byte[] message;
  	@JsonProperty
  	private MqttQoS qos;
  	@JsonProperty
  	private boolean isRetain;
  
  	public Message() {
  	}
  
  	public Message(ObjectDataInput in) throws IOException {
  		readData(in);
  	}
  
  	public Message(int id, String topicName, String publisherId, byte[] message, MqttQoS qos, boolean isRetain) {
  		this.id = id;
  		this.topicName = topicName;
  		this.publisherId = publisherId;
  		this.message = message != null ? message : new byte[] {};
  		this.qos = qos;
  		this.isRetain = isRetain;
  	}
  
  	public String key() {
  		return Messages.key(publisherId, id);
  	}
  
  	/*
  	 * (non-Javadoc)
  	 * 
  	 * @see net.anyflow.lannister.message.IMessage#id()
  	 */
  	@Override
  	public int id() {
  		return id;
  	}
  
  	public void id(int id) {
  		this.id = id;
  	}
  
  	/*
  	 * (non-Javadoc)
  	 * 
  	 * @see net.anyflow.lannister.message.IMessage#topicName()
  	 */
  	@Override
  	public String topicName() {
  		return topicName;
  	}
  
  	@Override
  	public String publisherId() {
 		return publisherId;
 	}
 
 	public void publisherId(String publisherId) {
 		this.publisherId = publisherId;
 	}
 
 	/*
 	 * (non-Javadoc)
 	 * 
 	 * @see net.anyflow.lannister.message.IMessage#message()
 	 */
 	@Override
 	public byte[] message() {
 		return message;
 	}
 
 	public void setMessage(byte[] message) {
 		this.message = message != null ? message : new byte[] {};
 	}
 
 	/*
 	 * (non-Javadoc)
 	 * 
 	 * @see net.anyflow.lannister.message.IMessage#qos()
 	 */
 	@Override
 	public MqttQoS qos() {
 		return qos;
 	}
 
 	public void qos(MqttQoS qos) {
 		this.qos = qos;
 	}
 
 	/*
 	 * (non-Javadoc)
 	 * 
 	 * @see net.anyflow.lannister.message.IMessage#isRetain()
 	 */
 	@Override
 	public boolean isRetain() {
 		return isRetain;
 	}
 
 	public void setRetain(boolean isRetain) {
 		this.isRetain = isRetain;
 	}
 
 	@Override
 	public String toString() {
 		return new StringBuilder(StringUtil.simpleClassName(this)).append('[').append("id=").append(id)
 				.append(", topeName=").append(topicName).append(", message=")
 				.append(new String(message, CharsetUtil.UTF_8)).append(", QoS=").append(qos).append(", retain=")
 				.append(isRetain).append(']').toString();
 	}
 
 	@Override
 	public Message clone() {
 		return new Message(id, topicName, publisherId, message, qos, isRetain);
 	}
 
 	@JsonIgnore
 	@Override
 	public int getFactoryId() {
 		return SerializableFactory.ID;
 	}
 
 	@JsonIgnore
 	@Override
 	public int getId() {
 		return ID;
 	}
 
 	@Override
 	public void writeData(ObjectDataOutput out) throws IOException {
 		out.writeInt(id);
 		out.writeUTF(topicName);
 		out.writeUTF(publisherId);
 		out.writeByteArray(message);
 		out.writeInt(qos != null ? qos.value() : Byte.MIN_VALUE);
 		out.writeBoolean(isRetain);
 	}
 
 	@Override
 	public void readData(ObjectDataInput in) throws IOException {
 		id = in.readInt();
 		topicName = in.readUTF();
 		publisherId = in.readUTF();
 		message = in.readByteArray();
 
 		int rawInt = in.readInt();
 		qos = rawInt != Byte.MIN_VALUE ? MqttQoS.valueOf(rawInt) : null;
 
 		isRetain = in.readBoolean();
 	}
 
 	public static Message newMessage(String clientId, MqttPublishMessage published) {
 		return new Message(published.variableHeader().messageId(), published.variableHeader().topicName(), clientId,
 				NettyUtil.copy(published.payload()), published.fixedHeader().qosLevel(),
 				published.fixedHeader().isRetain());
 	}
 }