/*
    * Copyright 2014 The Netty Project
    *
    * The Netty Project licenses this file to you 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:
    *
    *   https://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 io.netty.handler.codec.mqtt;
  
  import io.netty.util.internal.ObjectUtil;
  import io.netty.util.internal.StringUtil;
  
  import java.sql.Array;
  import java.util.ArrayList;
  import java.util.Arrays;
  import java.util.Collections;
  import java.util.List;
  
  /**
   * Payload of the {@link MqttSubAckMessage}
   */
  public class MqttSubAckPayload {
  
      private final List<MqttReasonCodes.SubAck> reasonCodes;
  
      public MqttSubAckPayload(int... reasonCodes) {
          ObjectUtil.checkNotNull(reasonCodes, "reasonCodes");
  
          List<MqttReasonCodes.SubAck> list = new ArrayList<MqttReasonCodes.SubAck>(reasonCodes.length);
          for (int v: reasonCodes) {
              list.add(MqttReasonCodes.SubAck.valueOf((byte) (v & 0xFF)));
          }
          this.reasonCodes = Collections.unmodifiableList(list);
      }
  
      public MqttSubAckPayload(MqttReasonCodes.SubAck... reasonCodes) {
          ObjectUtil.checkNotNull(reasonCodes, "reasonCodes");
  
          List<MqttReasonCodes.SubAck> list = new ArrayList<MqttReasonCodes.SubAck>(reasonCodes.length);
          list.addAll(Arrays.asList(reasonCodes));
          this.reasonCodes = Collections.unmodifiableList(list);
      }
  
      public MqttSubAckPayload(Iterable<Integer> reasonCodes) {
          ObjectUtil.checkNotNull(reasonCodes, "reasonCodes");
          List<MqttReasonCodes.SubAck> list = new ArrayList<MqttReasonCodes.SubAck>();
          for (Integer v: reasonCodes) {
              if (v == null) {
                  break;
              }
              list.add(MqttReasonCodes.SubAck.valueOf(v.byteValue()));
          }
          this.reasonCodes = Collections.unmodifiableList(list);
      }
  
      public List<Integer> grantedQoSLevels() {
          List<Integer> qosLevels = new ArrayList<Integer>(reasonCodes.size());
          for (MqttReasonCodes.SubAck code: reasonCodes) {
              if ((code.byteValue() & 0xFF) > MqttQoS.EXACTLY_ONCE.value()) {
                  qosLevels.add(MqttQoS.FAILURE.value());
              } else {
                  qosLevels.add(code.byteValue() & 0xFF);
              }
          }
          return qosLevels;
      }
  
      public List<Integer> reasonCodes() {
          return typedReasonCodesToOrdinal();
      }
  
      private List<Integer> typedReasonCodesToOrdinal() {
          List<Integer> intCodes = new ArrayList<Integer>(reasonCodes.size());
          for (MqttReasonCodes.SubAck code: reasonCodes) {
              intCodes.add(code.byteValue() & 0xFF);
          }
          return intCodes;
      }
  
      public List<MqttReasonCodes.SubAck> typedReasonCodes() {
          return reasonCodes;
      }
  
      @Override
      public String toString() {
          return new StringBuilder(StringUtil.simpleClassName(this))
              .append('[')
              .append("reasonCodes=").append(reasonCodes)
              .append(']')
              .toString();
     }
 }