package ass.sivakfil.cvi4.task2;

import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Paths;
import java.util.Locale;

import javaslang.Tuple;
import javaslang.control.Try;

import org.joda.time.DateTime;
import org.joda.time.format.DateTimeFormat;
import org.joda.time.format.DateTimeFormatter;

public class Task2Dates {

    public static final String DATE_TIME_PATTERN = "EEE, MM. dd. YYYY hh:mm:ss Z";

    public static void main(String[] args) throws IOException {
        DateTimeFormatter format =
                DateTimeFormat.forPattern(DATE_TIME_PATTERN)
                .withLocale(Locale.US);

        DateTime mostRecentDate = Files.lines(Paths.get("dates.txt"))
        .map(line -> Try.of(() -> DateTime.parse(line, format)))
        .filter(trial -> trial.isSuccess())
        .map(trial -> trial.get())
        .reduce((date1, date2) -> date1.isAfter(date2) ? date1 : date2)
        .orElse(new DateTime(0L));

        System.out.println(mostRecentDate);
    }

}