/* 
 a program for writing lyrics in reverse. 
 */

package arraylistplay;

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;
    }

}