package com.activequant.utils;

import java.text.DecimalFormat;
import java.text.DecimalFormatSymbols;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.GregorianCalendar;
import java.util.Locale;
import java.util.TimeZone;

import com.activequant.domainmodel.TimeStamp;
import com.activequant.domainmodel.exceptions.InvalidDate8Time6Input;

/**
 * Convenience class.
 * 
 * @author ustaudinger
 * 
 */
public class Date8Time6Parser extends SimpleDateFormat {

	private static final long serialVersionUID = 1L;
	private DecimalFormat dcf;

	public Date8Time6Parser() {
		super("yyyyMMddHHmmss.SSS");
		DecimalFormatSymbols otherSymbols = new DecimalFormatSymbols(Locale.US);
		otherSymbols.setDecimalSeparator('.');
		dcf = new DecimalFormat("00000000000000.000000000", otherSymbols);
		setTimeZone(TimeZone.getTimeZone("UTC"));
	}
	
	public TimeStamp fromDouble(Double d8t6) throws InvalidDate8Time6Input {
		return new TimeStamp(getNanoseconds(d8t6));
	}

	public TimeStamp fromLong(Long d8t6) throws InvalidDate8Time6Input {
		return new TimeStamp(getNanoseconds(d8t6.doubleValue()));
	}
	
	public long getMicroseconds(Double d8t6) throws InvalidDate8Time6Input {
		String s1 = dcf.format(d8t6);
		Date d1;
		try {
			d1 = parse(s1);
		} catch (ParseException e) {
			throw new InvalidDate8Time6Input("Invalid input: " + d8t6);
		}
		long ms = d1.getTime();
		int i1 = (int) Math.floor(d8t6);
		double remainder = d8t6 - (double) i1;
		remainder *= 1000.0;
		remainder %= 1.0;
		double micros = remainder * 1000.0;
		return ms * 1000L + (long) micros;

	}

	public long getNanoseconds(Double d8t6) throws InvalidDate8Time6Input {
		return getMicroseconds(d8t6) * 1000L;
	}

	public long getNanoseconds(Long d8t6) throws InvalidDate8Time6Input {
		return getMicroseconds(d8t6.doubleValue()) * 1000L;
	}
	
	public TimeStamp getTimeStamp(Double d8t6) throws InvalidDate8Time6Input {
		return new TimeStamp(getNanoseconds(d8t6));
	}
	
	public TimeStamp getTimeStamp(Long d8t6) throws InvalidDate8Time6Input {
		return new TimeStamp(getNanoseconds(d8t6));
	}

	public Double fromMilliseconds(long ms) throws InvalidDate8Time6Input {
		String d = new Date8Time6Parser().format(new Date(ms));
		return Double.parseDouble(d);
	}

	public Double now() throws InvalidDate8Time6Input {
		GregorianCalendar cal = new GregorianCalendar();
		// cal.setTimeZone(TimeZone.getTimeZone("UTC"));
		return Double.parseDouble(new Date8Time6Parser().format(cal.getTime()));
	}

	public String toString(Double date8time6) {
		return dcf.format(date8time6);
	}
}