package arraylistplay;

import java.io.File;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.PrintWriter;
import java.lang.reflect.Array;
import java.util.Scanner;
import java.util.ArrayList;

/* 
program featuring an arraylist and file Io to read and reverse copy a lyric. 
 */

public class ReverseCopy {
   public static void main(String[] args) throws FileNotFoundException, IOException {
      String inputFileName = "flossin.txt";
      String outputFileName = "flossinReversed.txt";
      ArrayList<String> words = readWordsFromFile(inputFileName);
      writeWordsToFile(words,outputFileName);
   }



   private static ArrayList<String> readWordsFromFile(String inputFileName)
           throws FileNotFoundException {
      //equate a scanner with an 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 words;
   }

   private static void writeWordsToFile(ArrayList<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.size() -1); x >= 0; 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 a simple file name assuming that it will be found in the CS1Files/data directory
   private static String createFullFileName(String inputFileName) {
      String separator = System.getProperty("file.separator");
      String home = System.getProperty("user.home");
      String path = home + separator + "CS1Files" + separator + "data" + separator;
      String fullFileName = path + inputFileName;
      return fullFileName;
   }

}