import java.util.Scanner;

/*
 * Lab 2, Practice writing Methods
 *
 * name: CS 112 Course Staff
 */

public class Methods {
    /*
     * print3Times - takes a string s and prints it 3 times
     */
    public static void print3Times(String s) {
        for (int i = 0; i < 3; i++) {
            System.out.println(s);
        }
    }
    
    /*
     * printNTimes - takes a takes an integer n and a string s, 
     * and prints the string n times
     */
    public static void printNTimes(int n, String s) {
        for (int i = 0; i < n; i++) {
            System.out.println(s);
        }
    }
    
    /*
     * For Fall 2019 this method was moved to the String practice 
     * task of the lab
     *
     * replaceStart - takes s1 and s2 and creates a new string in which 
     * the first s1Len characters of s2 are replaced by s1, 
     * where s1Len is the length of s1.
     */
    public static String replaceStart(String s1, String s2) {
        if ( s1 == null || s2 == null )
   	    throw new IllegalArgumentException();

        int s1Len = s1.length();
        if (s1Len < s2.length()) {
            String s2End = s2.substring(s1Len);  // in Python: s2[s1Len: ]
            s1 += s2End;
        }

        return( s1 );
    }

    /*
     * This method prompts for a name and age and displays
     * a welcome message accordinglty 
     */

    public static void greetMe() {
	Scanner scan = new Scanner( System.in );
	int age;
	String keepGreeting;

	do {
	    System.out.print( "\nPlease enter your name: " );
	    String name = scan.nextLine();
	    System.out.print( "Hello " + name + ", Welcome to CS112!!!\nHow old are you " + name + "? " );
	    age = scan.nextInt();

	    System.out.println( insult( name, age ) );

	    System.out.print( "\nWould you like to issue another greeting (yes/no)? " );
	    keepGreeting = scan.next();

	    // Need to use this to read throg the newline character left on the input buffer
	    // from the prior call to next()
	    // Recall that each call to nextLine will stop at the first newline encountered
	    scan.nextLine();

	} while ( keepGreeting.equals("yes") ); // Note the use of calling the equals method on the String object
    }

    /*
     * This method forms a string based on the value
     * of the age argument.
     */

    public static String insult( String name, int age ) {
	// Can also check that the parameter name is not passed a null value, 
	// but not explicitly necessary as this method is not invoking any methods on name.
	//
	String insult = "Wow " + name + ", you ";
	
	if ( age <= 0 )
		insult += "are an idiot who does not pay attention to directions";
	else
	if ( age < 11 )
		insult += "are still sweet, for the moment";
	else
	if ( age < 18 )
		insult += "are such a dweeb";
	else
	if ( age < 21 ) {
                int diff = 21-age;
                insult += "have " + diff + " year";
                if (diff > 1)
                        insult += "s";
                insult += " to go";
	} else
	if ( age == 21 )
		insult += "just made it";
	else
	if ( age < 30 ) {
		int diff = 30-age;
		insult += "have only " + diff + " good year";
		if (diff > 1)
			insult += "s";
		insult += " left";
	} else
	if ( age < 40 )
		insult += "are in a sorry state";
	else
	if ( age < 50 )
		insult += "must be miserable";
	else
		insult = "yikes";

	insult += "!!!";

	return( insult );
    }

    /*
     * This method is the entry point of our program.
     *
     * This method should be used to call the individual methods
     * that have been written as specified in lab.
     *
     */
    public static void main( String [] args ) {

	greetMe();
    }
}