package org.gvsig.units;

import java.util.ArrayList;

public enum Unit {
	KILOMETERS("Kilometros", "Km", 1000), METERS("Metros", "m", 1), CENTIMETERS(
			"Centimetros", "cm", 0.01), MILIMETERS("Milimetros", "mm", 0.001), MILES(
			"Millas", "mi", 1609.344), YARDS("Yardas", "Ya", 0.9144), FEET(
			"Pies", "ft", 0.3048), INCHES("Pulgadas", "inche", 0.0254), DEGREES(
			"Grados", "ยบ", 1 / 8.983152841195214E-6);

	public String name;
	public String symbol;
	private double toMeter;
	private double toSquareMeter;

	Unit(String name, String symbol, double toMeter) {
		this.name = name;
		this.symbol = symbol;
		this.toMeter = toMeter;
		this.toSquareMeter = Math.pow(toMeter, 2);
	}

	public double toMeter() {
		return toMeter;
	}

	public double toSquareMeter() {
		return toSquareMeter;
	}

	public static String[] getDistanceNames() {
		ArrayList<String> ret = new ArrayList<String>();
		for (Unit unit : Unit.values()) {
			ret.add(unit.name);
		}

		return ret.toArray(new String[0]);
	}

	public static String[] getDistanceSymbols() {
		ArrayList<String> ret = new ArrayList<String>();
		for (Unit unit : Unit.values()) {
			ret.add(unit.symbol);
		}

		return ret.toArray(new String[0]);
	}

	/**
	 * @param name
	 * @return
	 * @throws IllegalArgumentException
	 *             If there is no unit with the specified name
	 */
	public static Unit fromName(String name) throws IllegalArgumentException {
		for (Unit unit : values()) {
			if (unit.name.equals(name)) {
				return unit;
			}
		}

		throw new IllegalArgumentException("No such unit: " + name);
	}

	public String getSquareSuffix() {
		/*
		 * All units are linear
		 */
		return String.valueOf((char) 178);
	}
}