/* Java application that presents an example use of the DieBlackJack class.
** The use provides the "goal" (as a positive integer value) as either a
** run argument or in response to the prompt.
**
** CMPS 134 Fall 2019 
** Authors: P.M.J & R.W.M. 
*/
//import java.util.*;
import java.util.Scanner;

public class DieBlackJackClient {
   public static void main(String[] args) {
      // Create a DieBlackJack object having the goal specified by
      // either a run argument or, absent one, the user.
      int goal = getIntArg(args,0,"Enter goal:>");
      DieBlackJack DBJ = new DieBlackJack(goal);

      // Show the initial status of the DieBlackJack object.
      printStatus(DBJ, "Initially: ");
      //System.out.println("<<<<<<<<<<<<<<<<<");

      // Have the DieBlackJack object keep taking turns as long as
      // the shouldTakeTurn() method says it is advisable to do so.
      // Show the object's status after each turn.
      System.out.println("Now playing ...");
      while(DBJ.shouldTakeTurn()) {
         int rollValue = DBJ.takeTurn();
         printStatus(DBJ, "+" + rollValue + " = ");
      }

      // Show the status of the DieBlackJack object at this point.
      //System.out.println(">>>>>>>>>>>>>>>>>");
      //printStatus(DBJ, "     ");
      //System.out.println(">>>>>>>>>>>>>>>>>");

      // Show the relationship to the goal (short, equal, or exceeded).
      printRelationToGoal(DBJ);

      // Now have the DieBlackJack object take one more turn, just
      // to see what happens.  (If it had already reached or exceeded
      // its goal, the takeTurn() method will throw an exception,
      // which will be caught here.)
      printHorizontalLine();
      System.out.println("Taking one more turn ...");
      try {
         int rollValue = DBJ.takeTurn();
         printStatus(DBJ, "+" + rollValue + " = ");
      } catch (Exception e) {
         System.out.println(e); // +"\nContinuing ...\n");
         //printStatus(DBJ, "     ");
      }

      printHorizontalLine();
      printStatus(DBJ, "Finally: "); 
      // Finally, show the 
      //System.out.println(">>>>>>>>>>>>>>>>>");
      printRelationToGoal(DBJ);
      //System.out.println(DBJ.atGoal() + ", " + DBJ.exceededGoal());
      System.out.println("Done!!!");
   }

   private static void printStatus(DieBlackJack dbj, String prefix) {
      System.out.println(prefix + dbj.getRollTotal() + " of " + 
                         dbj.getGoal()); //  + ": " + dbj.toString());
   }

   /* Prints a message indicating the given DieBlackJack object's
   ** relationship to its goal.
   */
   private static void printRelationToGoal(DieBlackJack dbj) {
      if (dbj.atGoal()) {
         System.out.println("At goal!");
      }
      else if (dbj.exceededGoal()) {
         System.out.println("Exceeded goal");
      }
      else {
         System.out.println("Short of goal");
      }
   }

   /* Prints a horizontal line composed of hyphens.
   */
   private static void printHorizontalLine() {
      System.out.println("------------------------");
   }

   /* Returns args[index] converted to an int, assuming that args[]
   ** has length at least index+1 (so that such an element exists).
   ** Otherwise, it prints the given prompt and returns the user's 
   ** response, converted to an int.
   */
   private static int getIntArg(String args[], int index, String prompt) {
      int result = 0;
      if(args.length > index) {
         result = Integer.parseInt(args[index]);
      } else {
         System.out.print(prompt);
         result = new Scanner(System.in).nextInt();
      }
      return result;
   }
}