package net.minecraft.stats;

import java.text.DecimalFormat;
import java.text.DecimalFormatSymbols;
import java.text.NumberFormat;
import java.util.Locale;

public interface StatFormatter {
	DecimalFormat DECIMAL_FORMAT = new DecimalFormat("########0.00", DecimalFormatSymbols.getInstance(Locale.ROOT));
	StatFormatter DEFAULT = NumberFormat.getIntegerInstance(Locale.US)::format;
	StatFormatter DIVIDE_BY_TEN = value -> DECIMAL_FORMAT.format(value * 0.1);
	StatFormatter DISTANCE = cm -> {
		double meters = cm / 100.0;
		double kilometers = meters / 1000.0;
		if (kilometers > 0.5) {
			return DECIMAL_FORMAT.format(kilometers) + " km";
		} else {
			return meters > 0.5 ? DECIMAL_FORMAT.format(meters) + " m" : cm + " cm";
		}
	};
	StatFormatter TIME = value -> {
		double seconds = value / 20.0;
		double minutes = seconds / 60.0;
		double hours = minutes / 60.0;
		double days = hours / 24.0;
		double years = days / 365.0;
		if (years > 0.5) {
			return DECIMAL_FORMAT.format(years) + " y";
		} else if (days > 0.5) {
			return DECIMAL_FORMAT.format(days) + " d";
		} else if (hours > 0.5) {
			return DECIMAL_FORMAT.format(hours) + " h";
		} else {
			return minutes > 0.5 ? DECIMAL_FORMAT.format(minutes) + " min" : seconds + " s";
		}
	};

	String format(int value);
}