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/*
 * -------------------------------- MIT License --------------------------------
 * 
 * Copyright (c) 2023 SNF4J contributors
 * 
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 * 
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 *
 * -----------------------------------------------------------------------------
 */
package org.snf4j.tls.extension;

import org.snf4j.tls.IntConstant;

public class PskKeyExchangeMode extends IntConstant {

	private static final PskKeyExchangeMode[] EMPTY = new PskKeyExchangeMode[0];
	
	public static final PskKeyExchangeMode PSK_KE = new PskKeyExchangeMode("psk_ke", 0);

	public static final PskKeyExchangeMode PSK_DHE_KE = new PskKeyExchangeMode("psk_dhe_ke", 1);
	
	protected PskKeyExchangeMode(String name, int value) {
		super(name, value);
	}

	protected PskKeyExchangeMode(int value) {
		super(value);
	}

	public static PskKeyExchangeMode of(int value) {
		switch (value) {
		case 0:
			return PSK_KE;
			
		case 1:
			return PSK_DHE_KE;
			
		default:
			return new PskKeyExchangeMode(value);
		}
	}

	public static PskKeyExchangeMode[] implemented(PskKeyExchangeMode[] modes) {
		if (modes.length > 0) {
			boolean found = false;
			
			for (PskKeyExchangeMode mode: modes) {
				if (mode == PskKeyExchangeMode.PSK_DHE_KE) {
					found = true;
					break;
				}
			}
			if (found) {
				if (modes.length > 1) {
					modes = new PskKeyExchangeMode[] { PskKeyExchangeMode.PSK_DHE_KE };
				}
			}
			else {
				modes = EMPTY;
			}
		}
		return modes;
	}
}