/* 
 *ArryayList doing a reverse copy operation from one file ot 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="SomethingVague.text";
        String outputFileName="SomethingVagueReversed.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 Scanner establishScanner(String inputFileName)
    throws FileNotFoundException{
        String fullFileName=createFullFileName(inputFileName);
        return new Scanner((new File(fullFileName)));
    }

    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 a 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;
    }
//Create the full file name for a simple file name, assuming that it will be founr in the CS1 files/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;

    }
}