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/*
 * Copyright 2015-2018 the original author or authors.
 *
 * 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 org.springframework.data.redis.connection.util;

import java.util.Collection;
import java.util.Iterator;
import java.util.LinkedHashSet;
import java.util.Set;

public class ByteArraySet implements Set {

	LinkedHashSet delegate;

	public ByteArraySet() {
		this.delegate = new LinkedHashSet<>();
	}

	public ByteArraySet(Collection values) {
		this();
		addAll(values);
	}

	public int size() {
		return delegate.size();
	}

	public boolean contains(Object o) {

		if (o instanceof byte[]) {
			return delegate.contains(new ByteArrayWrapper((byte[]) o));
		}
		return delegate.contains(o);
	}

	public boolean add(ByteArrayWrapper e) {
		return delegate.add(e);
	}

	public boolean add(byte[] e) {
		return delegate.add(new ByteArrayWrapper(e));
	}

	public boolean containsAll(Collection c) {

		for (Object o : c) {
			if (o instanceof byte[]) {
				if (!contains(new ByteArrayWrapper((byte[]) o))) {
					return false;
				}
			} else {
				if (!contains(o)) {
					return false;
				}
			}
		}
		return true;
	}

	public boolean addAll(Collection c) {
		return delegate.addAll(c);
	}

	public boolean addAll(Iterable c) {

		for (byte[] o : c) {
			add(o);
		}
		return true;
	}

	@Override
	public boolean isEmpty() {
		return delegate.isEmpty();
	}

	@Override
	public Iterator iterator() {
		return delegate.iterator();
	}

	@Override
	public Object[] toArray() {
		return delegate.toArray();
	}

	@Override
	public  T[] toArray(T[] a) {
		return delegate.toArray(a);
	}

	@Override
	public boolean remove(Object o) {

		if (o instanceof byte[]) {
			delegate.remove(new ByteArrayWrapper((byte[]) o));
		}
		return delegate.remove(o);
	}

	@Override
	public boolean retainAll(Collection c) {
		return delegate.retainAll(c);
	}

	@Override
	public boolean removeAll(Collection c) {

		for (Object o : c) {
			remove(o);
		}
		return true;
	}

	@Override
	public void clear() {
		delegate.clear();
	}

	public Set asRawSet() {

		Set result = new LinkedHashSet<>();
		for (ByteArrayWrapper wrapper : delegate) {
			result.add(wrapper.getArray());
		}
		return result;
	}

}