package seng302.Model;

import com.github.bfsmith.geotimezone.TimeZoneLookup;
import com.github.bfsmith.geotimezone.TimeZoneResult;
import javafx.beans.property.SimpleStringProperty;
import javafx.beans.property.StringProperty;
import seng302.GPSCoordinate;

import java.time.Duration;
import java.time.LocalDateTime;
import java.time.ZoneId;
import java.time.ZonedDateTime;
import java.time.format.DateTimeFormatter;
import java.time.temporal.ChronoUnit;

/**
 * Created by Gondr on 19/04/2017.
 */
public class RaceClock {
    private long lastTime;
    private ZoneId zoneId;
    private ZonedDateTime time;
    private StringProperty timeString;

    public RaceClock(ZonedDateTime zonedDateTime) {
        this.zoneId = zonedDateTime.getZone();
        this.timeString = new SimpleStringProperty();
        this.time = zonedDateTime;
        setTime(time);
    }

    public static ZonedDateTime getCurrentZonedDateTime(GPSCoordinate gpsCoordinate) {
        TimeZoneLookup timeZoneLookup = new TimeZoneLookup();
        TimeZoneResult timeZoneResult = timeZoneLookup.getTimeZone(gpsCoordinate.getLatitude(), gpsCoordinate.getLongitude());
        ZoneId zone = ZoneId.of(timeZoneResult.getResult());
        return LocalDateTime.now(zone).atZone(zone);
    }

    /**
     * Sets time to arbitrary zoned time.
     *
     * @param time arbitrary time with timezone.
     */
    public void setTime(ZonedDateTime time) {
        this.time = time;
        this.timeString.set(DateTimeFormatter.ofPattern("HH:mm:ss dd/MM/YYYY Z").format(time));
        this.lastTime = System.currentTimeMillis();
    }

    /**
     * Updates time by duration elapsed since last update.
     */
    public void updateTime() {
        this.time = this.time.plus(Duration.of(System.currentTimeMillis() - this.lastTime, ChronoUnit.MILLIS));
        this.lastTime = System.currentTimeMillis();
        setTime(time);
    }

    public String getTimeZone() {
        System.out.println(zoneId.toString());
        return zoneId.toString();
    }

    public StringProperty timeStringProperty() {
        return timeString;
    }
}