/*
    * Copyright 2020-2022 The OSHI Project Contributors
    * SPDX-License-Identifier: MIT
    */
   package oshi.driver.windows.perfmon;
   
   import static oshi.driver.windows.perfmon.PerfmonConstants.PROCESS;
   import static oshi.driver.windows.perfmon.PerfmonConstants.WIN32_PERFPROC_PROCESS;
   import static oshi.driver.windows.perfmon.PerfmonConstants.WIN32_PERFPROC_PROCESS_WHERE_IDPROCESS_0;
  import static oshi.driver.windows.perfmon.PerfmonConstants.WIN32_PERFPROC_PROCESS_WHERE_NOT_NAME_LIKE_TOTAL;
  
  import java.util.Collections;
  import java.util.List;
  import java.util.Map;
  
  import oshi.annotation.concurrent.ThreadSafe;
  import oshi.util.platform.windows.PerfCounterQuery;
  import oshi.util.platform.windows.PerfCounterWildcardQuery;
  import oshi.util.platform.windows.PerfCounterWildcardQuery.PdhCounterWildcardProperty;
  import oshi.util.tuples.Pair;
  
  /**
   * Utility to query Process Information performance counter
   */
  @ThreadSafe
  public final class ProcessInformation {
  
      /**
       * Process performance counters
       */
      public enum ProcessPerformanceProperty implements PdhCounterWildcardProperty {
          // First element defines WMI instance name field and PDH instance filter
          NAME(PerfCounterQuery.NOT_TOTAL_INSTANCES),
          // Remaining elements define counters
          PRIORITYBASE("Priority Base"), //
          ELAPSEDTIME("Elapsed Time"), //
          IDPROCESS("ID Process"), //
          CREATINGPROCESSID("Creating Process ID"), //
          IOREADBYTESPERSEC("IO Read Bytes/sec"), //
          IOWRITEBYTESPERSEC("IO Write Bytes/sec"), //
          PRIVATEBYTES("Working Set - Private"), //
          PAGEFAULTSPERSEC("Page Faults/sec");
  
          private final String counter;
  
          ProcessPerformanceProperty(String counter) {
              this.counter = counter;
          }
  
          @Override
          public String getCounter() {
              return counter;
          }
      }
  
      /**
       * Handle performance counters
       */
      public enum HandleCountProperty implements PdhCounterWildcardProperty {
          // First element defines WMI instance name field and PDH instance filter
          NAME(PerfCounterQuery.TOTAL_INSTANCE),
          // Remaining elements define counters
          HANDLECOUNT("Handle Count");
  
          private final String counter;
  
          HandleCountProperty(String counter) {
              this.counter = counter;
          }
  
          @Override
          public String getCounter() {
              return counter;
          }
      }
  
      /**
       * Processor performance counters
       */
      public enum IdleProcessorTimeProperty implements PdhCounterWildcardProperty {
          // First element defines WMI instance name field and PDH instance filter
          NAME(PerfCounterQuery.TOTAL_OR_IDLE_INSTANCES),
          // Remaining elements define counters
          PERCENTPROCESSORTIME("% Processor Time"), //
          ELAPSEDTIME("Elapsed Time");
  
          private final String counter;
  
          IdleProcessorTimeProperty(String counter) {
              this.counter = counter;
          }
  
          @Override
          public String getCounter() {
              return counter;
          }
      }
  
      private ProcessInformation() {
     }
 
     /**
      * Returns process counters.
      *
      * @return Process counters for each process.
      */
     public static Pair<List<String>, Map<ProcessPerformanceProperty, List<Long>>> queryProcessCounters() {
         if (PerfmonDisabled.PERF_PROC_DISABLED) {
             return new Pair<>(Collections.emptyList(), Collections.emptyMap());
         }
         return PerfCounterWildcardQuery.queryInstancesAndValues(ProcessPerformanceProperty.class, PROCESS,
                 WIN32_PERFPROC_PROCESS_WHERE_NOT_NAME_LIKE_TOTAL);
     }
 
     /**
      * Returns handle counters
      *
      * @return Process handle counters for each process.
      */
     public static Pair<List<String>, Map<HandleCountProperty, List<Long>>> queryHandles() {
         if (PerfmonDisabled.PERF_PROC_DISABLED) {
             return new Pair<>(Collections.emptyList(), Collections.emptyMap());
         }
         return PerfCounterWildcardQuery.queryInstancesAndValues(HandleCountProperty.class, PROCESS,
                 WIN32_PERFPROC_PROCESS);
     }
 
     /**
      * Returns cooked idle process performance counters.
      *
      * @return Cooked performance counters for idle process.
      */
     public static Pair<List<String>, Map<IdleProcessorTimeProperty, List<Long>>> queryIdleProcessCounters() {
         if (PerfmonDisabled.PERF_OS_DISABLED) {
             return new Pair<>(Collections.emptyList(), Collections.emptyMap());
         }
         return PerfCounterWildcardQuery.queryInstancesAndValues(IdleProcessorTimeProperty.class, PROCESS,
                 WIN32_PERFPROC_PROCESS_WHERE_IDPROCESS_0);
     }
 }