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


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

public class FireAlarm extends SecurityAlarm
{
   final double MAX_TEMP_THRESHOLD = 200.0;
   final double TEMP_FAIL_THRESHOLD = 40.0;

   double tempThreshold = 0.0;
   double tempSensor = 0.0;
   String location;

   public FireAlarm(String loc)
   {
      location = new String(loc);
      tempThreshold = MAX_TEMP_THRESHOLD;
   }

   public FireAlarm(String loc, double threshold)
   {
      location = new String(loc);
      if(threshold < MAX_TEMP_THRESHOLD)
         tempThreshold = MAX_TEMP_THRESHOLD;
      else
         tempThreshold = threshold;
   }

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

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

      if(tempSensor > tempThreshold)
      {
          alarm();
          status = ALARM_ACTIVATED;
      }
      else
         if(tempSensor < TEMP_FAIL_THRESHOLD)
         {
            alarmFailure("\nThe "+location
                         +" fire alarm senses a temperature of "
                         +twoDigits.format(tempSensor)
                        +"\nwhich is below the failure threshold of "+TEMP_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 temperature of "+twoDigits.format(tempSensor)+" has exceeded the threshold of "+tempThreshold+"\n");
   }
}

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