/*
    * Copyright 2020-2022 The OSHI Project Contributors
    * SPDX-License-Identifier: MIT
    */
   package oshi.hardware.platform.unix.aix;
   
   import static oshi.util.Memoizer.defaultExpiration;
   import static oshi.util.Memoizer.memoize;
   
  import java.net.NetworkInterface;
  import java.util.ArrayList;
  import java.util.List;
  import java.util.function.Supplier;
  
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import com.sun.jna.Native;
  import com.sun.jna.platform.unix.aix.Perfstat.perfstat_netinterface_t;
  
  import oshi.annotation.concurrent.ThreadSafe;
  import oshi.driver.unix.aix.perfstat.PerfstatNetInterface;
  import oshi.hardware.NetworkIF;
  import oshi.hardware.common.AbstractNetworkIF;
  
  /**
   * AIXNetworks class.
   */
  @ThreadSafe
  public final class AixNetworkIF extends AbstractNetworkIF {
  
      private static final Logger LOG = LoggerFactory.getLogger(AixNetworkIF.class);
  
      private long bytesRecv;
      private long bytesSent;
      private long packetsRecv;
      private long packetsSent;
      private long inErrors;
      private long outErrors;
      private long inDrops;
      private long collisions;
      private long speed;
      private long timeStamp;
  
      private Supplier<perfstat_netinterface_t[]> netstats;
  
      public AixNetworkIF(NetworkInterface netint, Supplier<perfstat_netinterface_t[]> netstats)
              throws InstantiationException {
          super(netint);
          this.netstats = netstats;
          updateAttributes();
      }
  
      /**
       * Gets all network interfaces on this machine
       *
       * @param includeLocalInterfaces include local interfaces in the result
       * @return A list of {@link NetworkIF} objects representing the interfaces
       */
      public static List<NetworkIF> getNetworks(boolean includeLocalInterfaces) {
          Supplier<perfstat_netinterface_t[]> netstats = memoize(PerfstatNetInterface::queryNetInterfaces,
                  defaultExpiration());
          List<NetworkIF> ifList = new ArrayList<>();
          for (NetworkInterface ni : getNetworkInterfaces(includeLocalInterfaces)) {
              try {
                  ifList.add(new AixNetworkIF(ni, netstats));
              } catch (InstantiationException e) {
                  LOG.debug("Network Interface Instantiation failed: {}", e.getMessage());
              }
          }
          return ifList;
      }
  
      @Override
      public long getBytesRecv() {
          return this.bytesRecv;
      }
  
      @Override
      public long getBytesSent() {
          return this.bytesSent;
      }
  
      @Override
      public long getPacketsRecv() {
          return this.packetsRecv;
      }
  
      @Override
      public long getPacketsSent() {
          return this.packetsSent;
      }
  
      @Override
      public long getInErrors() {
          return this.inErrors;
      }
  
      @Override
     public long getOutErrors() {
         return this.outErrors;
     }
 
     @Override
     public long getInDrops() {
         return this.inDrops;
     }
 
     @Override
     public long getCollisions() {
         return this.collisions;
     }
 
     @Override
     public long getSpeed() {
         return this.speed;
     }
 
     @Override
     public long getTimeStamp() {
         return this.timeStamp;
     }
 
     @Override
     public boolean updateAttributes() {
         perfstat_netinterface_t[] stats = netstats.get();
         long now = System.currentTimeMillis();
         for (perfstat_netinterface_t stat : stats) {
             String name = Native.toString(stat.name);
             if (name.equals(this.getName())) {
                 this.bytesSent = stat.obytes;
                 this.bytesRecv = stat.ibytes;
                 this.packetsSent = stat.opackets;
                 this.packetsRecv = stat.ipackets;
                 this.outErrors = stat.oerrors;
                 this.inErrors = stat.ierrors;
                 this.collisions = stat.collisions;
                 this.inDrops = stat.if_iqdrops;
                 this.speed = stat.bitrate;
                 this.timeStamp = now;
                 return true;
             }
         }
         return false;
     }
 }