/*
    * Copyright 2020-2022 The OSHI Project Contributors
    * SPDX-License-Identifier: MIT
    */
   package oshi.driver.windows.registry;
   
   import java.util.ArrayList;
   import java.util.List;
   
  import com.sun.jna.Pointer;
  import com.sun.jna.platform.win32.Netapi32;
  import com.sun.jna.platform.win32.Netapi32.SESSION_INFO_10;
  
  import oshi.annotation.concurrent.ThreadSafe;
  import oshi.jna.ByRef.CloseableIntByReference;
  import oshi.jna.ByRef.CloseablePointerByReference;
  import oshi.software.os.OSSession;
  
  /**
   * Utility to read process data from HKEY_PERFORMANCE_DATA information with backup from Performance Counters or WMI
   */
  @ThreadSafe
  public final class NetSessionData {
  
      private static final Netapi32 NET = Netapi32.INSTANCE;
  
      private NetSessionData() {
      }
  
      public static List<OSSession> queryUserSessions() {
          List<OSSession> sessions = new ArrayList<>();
          try (CloseablePointerByReference bufptr = new CloseablePointerByReference();
                  CloseableIntByReference entriesread = new CloseableIntByReference();
                  CloseableIntByReference totalentries = new CloseableIntByReference()) {
              if (0 == NET.NetSessionEnum(null, null, null, 10, bufptr, Netapi32.MAX_PREFERRED_LENGTH, entriesread,
                      totalentries, null)) {
                  Pointer buf = bufptr.getValue();
                  SESSION_INFO_10 si10 = new SESSION_INFO_10(buf);
                  if (entriesread.getValue() > 0) {
                      SESSION_INFO_10[] sessionInfo = (SESSION_INFO_10[]) si10.toArray(entriesread.getValue());
                      for (SESSION_INFO_10 si : sessionInfo) {
                          // time field is connected seconds
                          long logonTime = System.currentTimeMillis() - (1000L * si.sesi10_time);
                          sessions.add(new OSSession(si.sesi10_username, "Network session", logonTime, si.sesi10_cname));
                      }
                  }
                  NET.NetApiBufferFree(buf);
              }
          }
          return sessions;
      }
  }