package com.guinetik.hexafun.examples.sysmon;
   
   import java.util.Random;
   
   /**
    * Mock implementation of MetricsProvider for testing and demos.
    *
    * <p>Returns configurable or random values. Useful for:
    * <ul>
   *   <li>Unit testing handlers without OS dependencies</li>
   *   <li>Demos with controlled/interesting values</li>
   *   <li>Simulating warning conditions</li>
   * </ul>
   */
  public class MockMetricsProvider implements MetricsProvider {
  
      private final double cpu;
      private final double memory;
      private final double disk;
  
      /**
       * Create with fixed values.
       */
      public MockMetricsProvider(double cpu, double memory, double disk) {
          this.cpu = cpu;
          this.memory = memory;
          this.disk = disk;
      }
  
      /**
       * Create with random values within realistic ranges.
       */
      public static MockMetricsProvider random() {
          Random r = new Random();
          return new MockMetricsProvider(
              20 + r.nextDouble() * 60,  // CPU: 20-80%
              30 + r.nextDouble() * 50,  // Memory: 30-80%
              40 + r.nextDouble() * 55   // Disk: 40-95%
          );
      }
  
      /**
       * Create with values designed to show warnings.
       */
      public static MockMetricsProvider withWarnings() {
          return new MockMetricsProvider(67.0, 52.0, 91.0);
      }
  
      /**
       * Create with all healthy values.
       */
      public static MockMetricsProvider healthy() {
          return new MockMetricsProvider(35.0, 48.0, 62.0);
      }
  
      @Override
      public double getCpuUsage() {
          return cpu;
      }
  
      @Override
      public double getMemoryUsage() {
          return memory;
      }
  
      @Override
      public double getDiskUsage() {
          return disk;
      }
  }