/* 
  * 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.ArrayList;
 import java.util.Scanner;

 public class ReverseCopy {

     public static void main(String[] args) throws FileNotFoundException, IOException {
         String inputFileName = "TrainFood.text";
         String outputFileName = "TrainFoodReversed.text";
         ArrayList<String> words = readWordsFromFile(inputFileName);
         writeWordsToFile(words, outputFileName);
     }

     private static ArrayList<String> readWordsFromFile(String inputFileName) throws FileNotFoundException {
         // equate scanner with input file
         Scanner scanner = establishScanner(inputFileName);
         // read the words from the file into a dynamically growing ArrayList.
         ArrayList<String> words = new ArrayList<>();
         while (scanner.hasNext()) {
             String word = scanner.next();
             words.add(word);
         }
         // return the words
         return words;
     }

     private static void writeWordsToFile(ArrayList<String> words, String outputFileName) throws IOException {
         // equate a printer with the output file
         PrintWriter printer = getPrintWriter(outputFileName);
         // print the words to the file
         for (int x = words.size()-1; x>=0; x=x-1) {
             printer.println(words.get(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 the 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;
     }

 }