import java.util.*;
import java.io.*;
public class counter extends Vector {
	static int i; //for initialization
	//constructors
	public counter( int a, int b ) {
		super( a, b );
	}
	public counter( int a ) {
		super( a );
	}
	//method to handle the main menu.
	private static void mainMenu() {
		//input streams for selections
		InputStreamReader into = new InputStreamReader( System.in );
		BufferedReader buffTo = new BufferedReader( into );
		System.out.println( "\nPlease enter a selection. 0 to exit, 1 to record a vector, or 2 to load a vector\n" );
		//try statement for selection
		try {
			
		String s = buffTo.readLine();
			if ( s.equals( "0" ) ) {
				System.exit( 1 );
			}
			else if ( s.equals( "1" ) ) {
				createVector();
			}
			else if (s.equals( "2" ) ) {
				loadVector();
			}
			else {
			}
		}
		catch ( IOException e ) {
			System.out.println(e);
		}
		catch ( NumberFormatException e ) {
			System.out.println(e);
		}
		catch ( ArrayIndexOutOfBoundsException e ) {
			System.out.println(e);
		}
	}
	//simple print method
	private static void print( counter a ) {
		int b = a.size();
		for ( i = 0; i < b; i++ ) {
			System.out.println( "\n" + ( i + 1 ) + ": " + a.get( i ) );
		}
	}
	//overloading method that takes second argument, how far into the vector to print until it stops. commented out because it is currently not used.
	//private static void print( counter a, int printTil ) {
	//	if ( printTil > a.size() ) {
	//		print( a );
	//	}
	//	else {
	//		for ( i = 0; i < printTil; i++ ) {
	//			System.out.println( ( i + 1 ) + ": " + a.get( i ) );
	//		}
	//	}
	//}
	//method to create the vector
	private static void createVector() {
		//declarations
		InputStreamReader in = null;
		BufferedReader buff = null;
		counter vec;
		//try block
		try {
				//definition (initialization)
				vec = new counter( 0, 0 );
				in = new InputStreamReader( System.in );
				buff = new BufferedReader( in );
				System.out.println( "Please enter a size for the vector\n" );
				int size = Integer.parseInt( buff.readLine() );
				vec.setSize( size );
				//loop to let user know how many strings to input
				for ( i = 0; i < size; i++ ) {
					System.out.println( "Please enter " + ( size - i ) + " more strings" );
					String s = buff.readLine();
					vec.set( i, s );
					}
				//pipe output to a txt file
				FileOutputStream exportTo = new FileOutputStream( "vector.txt" );
				PrintStream exportOut = new PrintStream( exportTo );
				for ( i = 0; i < size; i++ ) {
					exportOut.println( vec.get( i ) );
				}
				System.out.println( "\nWould you like to print the vector? If so, type yes. To exit, type no. To go to the main menu, type menu. \n" );
				String s = buff.readLine();
					if ( s.equalsIgnoreCase( "yes" ) ) {
						print( vec );
					}
					else if ( s.equalsIgnoreCase( "no" ) ) {
						System.exit( 1 );
					}
					else if ( s.equalsIgnoreCase( "menu" ) ) {
						mainMenu();
					}
					else {
					}
				}
			//end try
			//catch a few exceptions
			catch ( IOException e ) {
				System.out.println(e);
			}
			catch ( NumberFormatException e ) {
				System.out.println(e);
			}
			catch ( ArrayIndexOutOfBoundsException e ) {
				System.out.println(e);
			}
	}
	//method to load the vector
	private static void loadVector() {
		
		System.out.println( "Reading vector." );
		counter v = new counter( 0, 0 );
		String s = "";
		//try to load the file
		try {
			FileReader read = new FileReader( "vector.txt" );
			BufferedReader readTo = new BufferedReader(read);
			while ( s != null ) {
				s  = readTo.readLine();
				v.add( s );
			}
		
		//remove the trailing null string
		v.remove( ( v.size() - 1 ) );
		}
		catch ( IOException e ) {
			System.out.println( "\nVector loading failed " + e);
		}
		catch ( NumberFormatException e ) {
			System.out.println( "\nVector loading failed " + e );
		}
		catch ( ArrayIndexOutOfBoundsException e ) {
			System.out.println( "\nVector loading failed " + e );
		}
		System.out.println( "\nVector loaded." );
		//loop to handle user input for selection
		while (true) {
				System.out.print( "\nType 0 to exit, 1 to print, and 2 to return to the menu.\n" );
				InputStreamReader input = new InputStreamReader( System.in );
				BufferedReader buffTo = new BufferedReader( input );
			
				try {
					s = buffTo.readLine();
					if ( s.equals( "1" ) ) {
						print( v );
					}
					else if ( s.equals( "0" ) ) {
						System.exit( 1 );
					}
					else if ( s.equals( "2" ) ) {
						mainMenu();
					}
					else {
					}
				}
				catch ( FileNotFoundException e ) {
					System.out.println( "Vector loading failed " + e );
				}
				catch ( IOException e ) {
					System.out.println( "Vector loading failed " + e);
				}
				catch ( NumberFormatException e ) {
					System.out.println( "Vector loading failed " + e );
				}
				catch ( ArrayIndexOutOfBoundsException e ) {
					System.out.println( "Vector loading failed " + e );
				}
			}
		}
		//main method
	public static void main( String[] args ) {
		mainMenu();
	}
}