/*
   Chapter 10:   CoAlarm
   Programmer:   Brad Shedd
   Date:         May 6, 2004
   Program Name: CoAlarm.java
*/


import java.lang.Math;
import java.text.DecimalFormat;

public class CoAlarm extends SecurityAlarm
{
   final double MAX_CO_THRESHOLD = 200.0;
   final double CO_FAIL_THRESHOLD = 40.0;

   double COThreshold = 0.0;
   double COSensor = 0.0;
   String location;

   public COAlarm(String loc)
   {
      location = new String(loc);
      COThreshold = MAX_CO_THRESHOLD;
   }

   public COAlarm(String loc, double threshold)
   {
      location = new String(loc);
      if(threshold < MAX_CO_THRESHOLD)
         COThreshold = MAX_CO_THRESHOLD;
      else
         COThreshold = threshold;
   }

   public int sensorSample()
   {
      int status = NO_ALARM;
      DecimalFormat twoDigits = new DecimalFormat("##,##0.0");

      COSensor = Math.random()*1000;  // simulate getting a temperature reading

      if(COSensor > tempThreshold)
      {
          alarm();
          status = ALARM_ACTIVATED;
      }
      else
         if(COSensor < CO_FAIL_THRESHOLD)
         {
            alarmFailure("\nThe "+location
                         +" fire alarm senses a temperature of "
                         +twoDigits.format(COSensor)
                         +"\nwhich is below the failure threshold of "+CO_FAIL_THRESHOLD);
            status = ALARM_FAILURE;
          }

      return status;
   }

   public void alarm()
   {
      DecimalFormat twoDigits = new DecimalFormat("##,##0.0");

      System.out.println("*** The "+location+" fire alarm sensor has detected a potential fire.");
      System.out.println("*** The CO level of "+twoDigits.format(COSensor)+" has exceeded the threshold of "+COThreshold+"\n");
   }
}

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