/* 
 *This program features an ArrayList to do its reverse copy thing 
 * frome one file to another. 
 */
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 = "Chlorine.text";
        String outputFileName = "ChlorineReversed.text";
        ArrayList<String> words = readWordsFromFile(inputFileName);
        writeWordsToFile(words, outputFileName);

    }
    private static ArrayList<String> readWordsFromFile(String inputFileName)
            throws FileNotFoundException{
        //Equate a scanner with the 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 an 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 a simple file name, assuming it will be
    //found in the CS1Files/data subdirectory of the user's home directory.
    private static String createFullFileName(String fileName) {
        String separtor = System.getProperty("file.separator");
        String home = System.getProperty("user.home");
        String path = home + separtor + "CS1Files" + separtor + "data" + separtor;
        String fullFileName = path + fileName;
        return fullFileName;
    }
}