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/**
 * Copyright (C) 2015 Asterios Raptis
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *         http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package de.alpharogroup.random;

import java.util.ArrayList;
import java.util.List;
import java.util.Optional;

public class RandomObjectsExtensions {

	/**
	 * Gets an infomail address from the given url.
	 *
	 * @param url
	 *            The url.
	 * @return Returns an infomail address from the given url.
	 */
	public static String getInfomailFromWebsite(final String url) {
		int startIndex = url.indexOf("www.");
		final StringBuilder email = new StringBuilder();
		if (0 < startIndex) {
			final String emailprefix = "info";
			email.append(emailprefix);
			email.append("@");
			email.append(url.substring(startIndex + 4, url.length()));
		} else {
			startIndex = url.indexOf("//");
			if (0 < startIndex) {
				final String emailprefix = "info";
				email.append(emailprefix);
				email.append("@");
				email.append(url.substring(startIndex + 2, url.length()));
			} else {
				throw new IllegalArgumentException(url);
			}
		}
		return email.toString();
	}

	/**
	 * The Method getRandomEmail() gets a random email-address.
	 *
	 * @return The random email-address.
	 */
	public static String getRandomEmail() {
		final StringBuffer email = new StringBuffer();
		final String emailprefix = RandomExtensions.getRandomString(Constants.LCCHARSWN,
				RandomExtensions.randomInt(20) + 1);
		final String domain = RandomExtensions.getRandomString(Constants.LOWCASECHARS,
				RandomExtensions.randomInt(12) + 1);
		final String topDomain = RandomExtensions.getRandomString(Constants.LOWCASECHARS, 2);
		email.append(emailprefix);
		email.append("@");
		email.append(domain);
		email.append(".");
		email.append(topDomain);
		return email.toString();
	}

	/**
	 * Gets a random faxnumber from a phone.
	 *
	 * @param phonenumber
	 *            The phonenumber.
	 * @return Return's a random faxnumber from a phone.
	 */
	public static String getRandomFaxnumber(final String phonenumber) {
		final StringBuffer sb = new StringBuffer();
		final String randomFax = phonenumber.substring(0, phonenumber.length() - 2);
		sb.append(randomFax);
		final String phoneExtension = phonenumber.substring(phonenumber.length() - 2, phonenumber.length());
		final Integer phEx = new Integer(phoneExtension);
		final int pe = phEx + 1;
		sb.append(pe);
		return sb.toString();
	}

	/**
	 * Gets a random mobil number from a mobilphone.
	 *
	 * @return Return's a random mobil number from a mobilphone.
	 */
	public static String getRandomMobilnumber() {
		final StringBuffer randomPhonenumber = new StringBuffer();
		randomPhonenumber.append("0");
		randomPhonenumber.append(RandomExtensions.getRandomNumericString(3));
		randomPhonenumber.append("/");
		randomPhonenumber.append(RandomExtensions.getRandomNumericString(7));
		return randomPhonenumber.toString();
	}

	/**
	 * The Method getRandomPassword(int) produces a random password.
	 *
	 * @param length
	 *            The length from the password.
	 * @return The password.
	 */
	public static String getRandomPassword(final int length) {
		final String password = RandomExtensions.getRandomString(Constants.LCUCCHARSWN, length);
		return password;
	}

	/**
	 * The Method getRandomPassword(int) produces a random password.
	 *
	 * @param length
	 *            The length from the password as Optional.
	 * @return The password.
	 */
	public static String getRandomPassword(final Optional length) {
		if (length.isPresent()) {
			final String password = RandomExtensions.getRandomString(Constants.LCUCCHARSWN, length.get());
			return password;
		}
		return RandomExtensions.getRandomString(Constants.LCUCCHARSWN, 8);
	}

	/**
	 * Gets a random phonenumber.
	 *
	 * @return Return's a random phonenumber.
	 */
	public static String getRandomPhonenumber() {
		final StringBuffer randomPhonenumber = new StringBuffer();
		randomPhonenumber.append("0");
		randomPhonenumber.append(RandomExtensions.getRandomNumericString(4));
		randomPhonenumber.append("/");
		randomPhonenumber.append(RandomExtensions.getRandomNumericString(7));
		return randomPhonenumber.toString();
	}

	/**
	 * Gets a random name for a website.
	 *
	 * @return Returns a random name for a website.
	 */
	public static String getRandomWebsite() {
		final StringBuffer website = new StringBuffer();
		final String websitePrefix = "http://www";
		final String domain = RandomExtensions.getRandomString(Constants.LOWCASECHARS,
				RandomExtensions.randomInt(12) + 1);
		final String topDomain = RandomExtensions.getRandomString(Constants.LOWCASECHARS, 2);
		website.append(websitePrefix);
		website.append(".");
		website.append(domain);
		website.append(".");
		website.append(topDomain);
		return website.toString();
	}

	/**
	 * Creates a random id and returns it.
	 *
	 * @return the created random id.
	 */
	public static String newRandomId() {
		final StringBuffer sb = new StringBuffer();
		sb.append(RandomExtensions.getRandomString(Constants.LCUCCHARSWN, 2));
		sb.append(".");
		sb.append(RandomExtensions.getRandomString(Constants.LCUCCHARSWN, 4));
		sb.append(".");
		sb.append(RandomExtensions.getRandomString(Constants.LCUCCHARSWN, 2));
		sb.append(".");
		sb.append(System.currentTimeMillis());
		sb.append(".");
		sb.append(RandomExtensions.getRandomString(Constants.LCUCCHARSWN, 2));
		return sb.toString();
	}

	/**
	 * Creates a random Name from the donated chararray.
	 *
	 * @param donatedChars
	 *            The Characters for the name.
	 * @return A random Name.
	 */
	public static String newRandomName(final char[] donatedChars) {
		final StringBuffer sb = new StringBuffer(donatedChars.length);
		final List dc = new ArrayList<>(donatedChars.length);
		for (final char donatedChar : donatedChars) {
			dc.add(donatedChar);
		}
		boolean fullList = true;
		while (fullList) {
			final int randomIndex = RandomExtensions.randomInt(dc.size());
			final Character c = dc.get(randomIndex);
			sb.append(c);
			dc.remove(randomIndex);
			if (dc.isEmpty()) {
				fullList = false;
			}
		}
		return sb.toString();
	}

}