/* CounterTester_F18.java
** Java application program that interacts with the user (at the keyboard) for
** the purpose of testing the various classes in the Counter class hierarchy.
*/

import java.util.Scanner;
import java.io.IOException;

public class CounterTester_F18 {

   private static Scanner keyBoard = new Scanner(System.in);

   public static void main(String[] args) throws IOException  {

      Counter c = null;
      String responseStr;
      int response;
      int counterKind, init = 0, min = 0, max = 0; 

      println("Welcome to the Counter Tester program!");
      println("");
      println("Enter the kind of Counter to test:");
      println("  (1) (plain) Counter");
      println("  (2) Resetable Counter");
      println("  (3) RollOver Counter");
      println("  (4) Stopping Counter");
      println("  (5) Warning Counter");
       
      counterKind = keyBoard.nextInt();
      if (3 <= counterKind  &&  counterKind <= 5) {
         print("Enter minimum bound: ");
         min = keyBoard.nextInt();
         print("Enter maximum bound: ");
         max = keyBoard.nextInt();
      }
      print("Enter initial count value: ");
      init = keyBoard.nextInt();

      if (counterKind == 1) { c = new Counter(init); }
      else if (counterKind == 2) { c = new ResetableCounter(init); }
      else if (counterKind == 3) { c = new RollOverCounter(init, min, max); }
      else if (counterKind == 4) { 
         println("A line of code in CounterTester_F18 program must be\n" +
                 "un-commented to allow testing of a StoppingCounter.");
         // c = new StoppingCounter(init, min, max);
      }
      else if (counterKind == 5) { 
         println("A line of code in CounterTester_F18 program must be\n" +
                 "un-commented to allow testing of a WarningCounter.");
         //c = new WarningCounter(init, min, max); 
      }
      else { println("Illegal response"); }

      test(c);
   }

   private static void test(Counter c) throws IOException
   { 
      String response = "";

       
      println("Initial counter value = " + c.countVal());

      printHelp();

      while (!response.equals("q")) {
         print(">");
         response = keyBoard.next();

         if (response.equals("i")) {
            print("Incrementing to ");
            c.increment();
            println( "" + c.countVal());
         }
         else if (response.equals("d")) {
            print("Decrementing to ");
            c.decrement();
            println( "" + c.countVal());
         }
         else if (response.equals("r")) {
            if (c instanceof ResetableCounter) {
               print("Resetting to ");
               ((ResetableCounter) c).reset();
               println( "" + c.countVal());
            }
            else { 
               println("This Counter does not support the reset operation!");
            }
         }
         else if (response.equals("s")) {
            print("Setting to ");
            int k = keyBoard.nextInt(); 
            c.setTo(k);
            println( "" + c.countVal());
         }
         else if (response.equals("q")) {
            // do nothing
         }
         else if (response.equals("h")) {
            printHelp();
         }
         else {
            println("Illegal input; try again:");
            printHelp();
         }
      }  // end while
   }

   /* Prints instructions for the user.
   */
   private static void printHelp() {
      println("  Type i to increment, d to decrement, r to reset,\n" +
              "  s <num> to setTo, q to quit, and h for this help");
   }


   /* Surrogate for the System.out.println() method.
   */
   private static void println(String s) { System.out.println(s); }

   /* Surrogate for the System.out.print() method.
   */
   private static void print(String s) { System.out.print(s); }

}