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/*
 * Copyright (C) 2022 Parisi Alessandro - [email protected]
 * This file is part of MaterialFX (https://github.com/palexdev/MaterialFX)
 *
 * MaterialFX is free software: you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public License
 * as published by the Free Software Foundation; either version 3 of the License,
 * or (at your option) any later version.
 *
 * MaterialFX is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 * See the GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with MaterialFX. If not, see .
 */

package io.github.palexdev.mfxresources.utils;

import java.util.Random;

/**
 * Utility class which provides convenience methods for enumerators
 */
public class EnumUtils {
	public static final Random rng = new Random(System.currentTimeMillis());

	private EnumUtils() {
	}

	/**
	 * Checks if the given enumerator (as a class) contains the given String,
	 * same as {@link Enum#valueOf(Class, String)} but case-insensitive.
	 *
	 * @param clazz the Class object of the enum class from which to return a constant
	 * @param name  the name of the constant to return
	 * @return the enum constant of the specified enum class with the specified name
	 */
	public static > E valueOfIgnoreCase(Class clazz, String name) {
		E enumeration = null;
		for (E e : clazz.getEnumConstants()) {
			if (e.name().equalsIgnoreCase(name)) {
				enumeration = e;
			}
		}

		if (enumeration == null) {
			throw new IllegalArgumentException("No enum constant " + clazz.getCanonicalName() + "." + name);
		}

		return enumeration;
	}

	/**
	 * Given an enum class and an enumeration of the given enum returns the next enumeration.
	 *
	 * @param clazz the enum class
	 * @param val   the enum constant from which get the next constant
	 * @param    the enum type
	 * @return the constant next to the given val
	 */
	public static > E next(Class clazz, E val) {
		E[] values = clazz.getEnumConstants();
		return values[(val.ordinal() + 1) % values.length];
	}

	/**
	 * Given an enum class and an enumeration of the given enum returns the previous enumeration.
	 *
	 * @param clazz the enum class
	 * @param val   the enum constant from which get the previous constant
	 * @param    the enum type
	 * @return the constant before the given val
	 */
	public static > E previous(Class clazz, E val) {
		E[] values = clazz.getEnumConstants();
		return values[(val.ordinal() - 1 + values.length) % values.length];
	}

	/**
	 * Given an enumerator (as a class) retrieves a random constant
	 * using {@link Class#getEnumConstants()}.
	 */
	public static > E randomEnum(Class clazz) {
		E[] vals = clazz.getEnumConstants();
		return vals[rng.nextInt(vals.length)];
	}
}