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;

import static arrayplay.ReverseCopy.createFullFileName;

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

    private static ArrayList<String> readWordsFromFile(String inputFileName) throws FileNotFoundException {
        // Add 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 POWERReversed) throws IOException {
        // Equate a printer with an output file
        PrintWriter printer = getPrintWriter(POWERReversed);
        // 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 POWER) throws FileNotFoundException {
        String fullFileName = createFullFileName(POWER);
        return new Scanner(new File(fullFileName));
    }

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