/* 
  * Program featuring straight up arrays and file IO to read and reverse copy a lyric. 
  */

 package arrayplay;

 import java.io.File;
 import java.io.FileNotFoundException;
 import java.io.IOException;
 import java.io.PrintWriter;
 import java.util.Scanner;

 public class ReverseCopy {

     public static void main(String[] args) throws FileNotFoundException, IOException {
         String inputFileName = "Lyrics.text";
         String outputFileName = "LyricsReversed.text";
         String[] words = readWordsFromFile(inputFileName);
         writeWordsToFile(words,outputFileName);
     }

     private static final int LIMIT = 1000;

     private static String[] readWordsFromFile(String inputFileName) throws FileNotFoundException {
         // Equate a scanner with the input file
         Scanner scanner = establishScanner(inputFileName);
         // Read the words from the file into an oversized array
         String[] temp = new String[LIMIT];
         int index = 0;
         while ( scanner.hasNext() ) {
             String word = scanner.next();
             temp[index] = word;
             index = index + 1;
         }
         int wordCount = index;
         // Transfer the words to a perfectly sized array
         String[] words = new String[wordCount];
         for ( int x = 0; x < wordCount; x = x + 1 ) {
             words[x] = temp[x];
         }
         // Return the words
         return words;
     }

     private static void writeWordsToFile(String[] words, String outputFileName) throws IOException {
         // Equate a printer with an output file
         PrintWriter printer = getPrintWriter(outputFileName);
         // Print the words to the file
         for ( int x = words.length-1; x >= 0; x = x - 1 ) {
             printer.println(words[x]);
         }
         printer.close();
     }

     private static Scanner establishScanner(String inputFileName) throws FileNotFoundException {
         String fullFileName = createFullFileName(inputFileName);
         return new Scanner(new File(fullFileName));
     }

     private static PrintWriter getPrintWriter(String outputFileName) throws FileNotFoundException {
         String fullFileName = createFullFileName(outputFileName);
         PrintWriter printer = new PrintWriter(fullFileName);
         return printer;
     }

     // Create the full file name for a simple file name, assuming that it will be
     // found in the CS1Files/data subdirectory of the user’s home directory.
     private static String createFullFileName(String fileName) {
         String separator = System.getProperty("file.separator");
         String home = System.getProperty("user.home");
         String path = home + separator + "CS1Files" + separator + "data" + separator;
         String fullFileName = path + fileName;
         return fullFileName;
     }

 }