/*  CSI2114 Lab 4 - Sentence.java
 *  
 *  A driver program to test the implementation of the Sequence.
 *
 *  Usage: java Sentence
 *  
 *  by Jeff Souza 
 *
 */

class Sentence {
    public static void main (String args[]) {

        // Construct a sample sentence.
        Sequence sentence = new NodeSequence();

        // Start out with "This sentence."
        sentence.insertFirst("This ");
        sentence.insertLast("sentence.");
        printSentence( sentence );

        // Insert to make it "This sample dumb sentence."
        sentence.insertAfter( sentence.first(), "sample ");
        sentence.insertBefore( sentence.last(), "dumb ");
        printSentence( sentence );

        // Swap words to get "This dumb sample sentence."
        Position second = sentence.atRank( 1 );
        Position secondLast = sentence.before( sentence.last());
        sentence.swapElements( second, secondLast );
        printSentence( sentence );

        // Replace "dumb" to get "This is a sample sentence."
        sentence.replaceElement( second, "is ");
        Position middle = sentence.insertAfter( second, "a ");
        printSentence( sentence );

        // Remove "sample", leaving "This is a sentence."
        sentence.remove( secondLast );
        printSentence( sentence );

        // Note that "This is a self-referential sentence."
        sentence.insertAtRank( 3, "self-referential ");
        printSentence( sentence );

        // Now deconstruct the sentence.
        sentence.removeAtRank( sentence.rankOf( middle ));
        sentence.remove( sentence.last());
        sentence.remove( sentence.first());
        sentence.remove( sentence.last());
        sentence.remove( sentence.first());
        if ( sentence.isEmpty())
            System.out.println("\nThe sentence is now empty.");

        System.out.println("\nLet's end by throwing an exception:");
        int nonexistent = sentence.rankOf( second );
 }


    public static void printSentence( Sequence sentence ) {
        // Display the current sentence.
        Position pos = sentence.first();
        for ( int i = 1; i < sentence.size(); i++ ) {
            System.out.print( pos.element());
            pos = sentence.after( pos );
        }
        System.out.println( pos.element());
    }

}