/* File: Histogram.java
 * Author: CS112 Instructor
 * 
 * Purpose: This is a potential solution to the
 * Histogram problem.
 */

import java.util.Scanner;

public class Histogram { 
    
    private static final int SENTINAL = -999;          // sentinal value to signal endo of input
    private static final int MAX_NUMBERS = 20;         // maximum number of numbers to input
    private static final double UPPER_BOUND = 100.0;   // largest numbers accepted as data
    private static final double LOWER_BOUND = 0.0;     // smallest numbers accepted as adata
    private static final int NUM_BINS = 10;            // number of bins in range [0..100]

    //private static final int BIN_SIZE = ??           // size of each bin
   
    /*
     * Method to show an example of using StringBuilder.
     *
     * You will also notice that this method is called from the 
     * main function. 
     *
     */
    public static String getHeaderAsString( String me ) {

	// Create an instance of the StringBuilder class
	// which allows us to create an object of 
	// a series of strings that can then be converted 
	// into one large string via the toString method.
	//
    	StringBuilder sb=new StringBuilder();

        sb.append( System.getProperty("line.separator") );
        sb.append( "Welcome to the Histogram Program " + me + "!" );
	me = getFirstName(me);
        sb.append( System.getProperty("line.separator") );
        sb.append( System.getProperty("line.separator") );
        sb.append( "This program will print out a histogram of the numbers" );
        sb.append( System.getProperty("line.separator") );
        sb.append( "input by you " + getFirstName(me) + "." );
        sb.append( System.getProperty("line.separator") );
        sb.append( System.getProperty("line.separator") );
        sb.append( "Please enter up to " + MAX_NUMBERS + " doubles or " + SENTINAL + " to stop input!" );
        sb.append( System.getProperty("line.separator") );

        return sb.toString();
    }

    /* 
     * Method to return the first name of the user in case
     * the full name was entered. 
     */
    public static String getFirstName(String name ) {
        // Note that add the " " to string to be sure
        // there is something to split
	return (name+" ").split(" ")[0]; 
    }

    /* 
     * local main test driver
     *
     */
    public static void main(String[] args) {  

	// Connect to the keyboard as the input stream
        Scanner userInput = new Scanner( System.in );

        System.out.print( "And who am I working with today? " );
        String user = userInput.nextLine();

	String heading = getHeaderAsString( user );

        // Print out welcome message
        System.out.println( heading ); 
        
        // Call the method which prompts the user
        // to input the numbers that will be used
        // to build the histogram.
        //double[] numbers = inputNumbers( userInput );

	// Call the method to reate the array histogram
	//int[] histogram = calculateHistogram( numbers );

	// Print the historgram
	//System.out.println( toString( histogram ) );
    }

    /*
     *
     * COMPLETE YOUR METHODS
     *
     */

} // end of class