import java.io.File;
import java.io.FileNotFoundException;
import java.util.Scanner;

public class Main {

    public static void main(String[] args) {
        Worthaeufigkeitsanalyse analyse = new Worthaeufigkeitsanalyse();
        File file = getFileFromArguments(args);
        String text = "";
        Scanner scanner = null;
        try {
            scanner = new Scanner(file);
            while (scanner.hasNextLine()){
                text = text + scanner.nextLine();
                text = text + " ";
            }
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        }
        analyse.verarbeiteText(text);

        analyse.druckeStatistik();
    }

    private static File getFileFromArguments(String[] args) {
        // ------------------------------------------------------------
        // Check if a valid filename has been supplied on command line:
        // ------------------------------------------------------------
        // Is there a command line argument at all?
        if (args.length <= 0) {
            throw new IllegalArgumentException("ERROR: You have to supply a filename on the command line!");
        }
        // Yes, there is at least one argument:
        String filename = args[0];
        File file = new File(filename);
        if (!file.exists()) { // Check if file with that name exists:
            throw new RuntimeException(String.format("ERROR: Data file: '%s' does not exist!", filename));
        }
        return file;
    }
}