//this program feature an arraylist to do its reversed copy things from 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 = "b.text";
        String outputFileName = "bReveresed.text";
        ArrayList<String> words = readWordsFromFile(inputFileName);
        writeWordsToFile(words,outputFileName);
    }

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

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

    private static ArrayList<String> readWordsFromFile(String inputFileName) throws FileNotFoundException {
        //equate the 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 words;
    }

    private static Scanner establishScanner(String inputFileName) throws FileNotFoundException {
        String fullFileName = createFullFileName(inputFileName);
        return new Scanner(new File(fullFileName));
    }
// Create the full file name for a simple file name ,assuming that it will be
//found in the CS1File/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 + "CS1File" + separator + "data" + separator;
        String fullFileName = path + filename;
        return fullFileName;
    }

}