package com.FisheyLP.IntToString;

public class Umrechner {

	public static String[] einser = new String[] { "null", "ein", "zwei",
			"drei", "vier", "fünf", "sechs", "sieben", "acht", "neun" };
	public static String[] zehner = new String[] { null, "zehn", "zwanzig",
			"dreissig", "vierzig", "fünfzig", "sechzig", "siebzig", "achtzig",
			"neunzig" };

	public String convertToString(int i) {
		String text = "";

		boolean isMinus = i < 0;

		if (isMinus) {
			i = Math.abs(i);
		}

		if (containsHunderter(i)) {
			text = einser[getHunderter(i)] + "hundert";
			if (containsZehner(i)) {
				text = einser[getHunderter(i)] + "hundert"
						+ zehner[getZehner(i)];

				String zusatz = null;
				if (getEinser(i) == 1)
					zusatz = "elf";
				if (getEinser(i) == 2)
					zusatz = "zwölf";
				if (containsEinser(i)) {
					if (getZehner(i) < 2) {

						if (zusatz == null) {
							text = einser[getHunderter(i)] + "hundert"
									+ einser[getEinser(i)]
									+ zehner[getZehner(i)];
						} else {
							text = einser[getHunderter(i)] + "hundert" + zusatz;
						}
					} else {
						text = einser[getHunderter(i)] + "hundert"
								+ einser[getEinser(i)] + "und"
								+ zehner[getZehner(i)];
					}
				}
			} else {
				text = einser[getHunderter(i)] + "hundert"
						+ einser[getEinser(i)];
			}

			text = text.replace("eins", "ein");
		} else if (containsZehner(i)) {
			text = zehner[getZehner(i)];
			if (containsEinser(i)) {
				if (i == 11)
					return "Elf";
				if (i == 12)
					return "Zwölf";

				if (getZehner(i) < 2) {
					text = einser[getEinser(i)] + zehner[getZehner(i)];
				} else {
					text = einser[getEinser(i)] + "und" + zehner[getZehner(i)];
				}
			}
		} else {
			text = einser[getEinser(i)];
		}

		if (text.endsWith("ein")) {
			text = text + "s";
		}
		text = text.replace("achtzig", "achzig");

		text = text.substring(0, 1).toUpperCase() + text.substring(1);

		if (isMinus) {
			text = "Minus " + text;
		}
		return text;
	}

	public static int getEinser(int i) {
		String str = Integer.toString(i);
		String value = str.split("")[str.length()];

		return Integer.parseInt(value);
	}

	public static int getZehner(int i) {
		String str = Integer.toString(i);
		String value = str.split("")[str.length() - 1];

		return Integer.parseInt(value);
	}

	public static int getHunderter(int i) {
		String str = Integer.toString(i);
		String value = str.split("")[str.length() - 2];

		return Integer.parseInt(value);
	}

	public static boolean containsEinser(int i) {
		String text = Integer.toString(i);

		return !text.endsWith("0");
	}

	public static boolean containsZehner(int i) {
		String text = Integer.toString(i);

		if (text.length() < 2)
			return false;

		return !text.split("")[text.length() - 1].contains("0");
	}

	public static boolean containsHunderter(int i) {
		String text = Integer.toString(i);

		if (text.length() < 3)
			return false;

		return !text.split("")[text.length() - 2].contains("0");
	}
}