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/**
 * Copyright 2018 Nikita Koksharov
 *
 * 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.redisson.api;

import java.util.Set;

/**
 * Async set functions
 *
 * @author Nikita Koksharov
 *
 * @param  value
 */
public interface RSetAsync extends RCollectionAsync, RSortableAsync> {

    /**
     * Removes and returns random elements from set
     * in async mode
     * 
     * @param amount of random values
     * @return random values
     */
    RFuture> removeRandomAsync(int amount);
    
    /**
     * Removes and returns random element from set
     * in async mode
     * 
     * @return value
     */
    RFuture removeRandomAsync();

    /**
     * Returns random element from set
     * in async mode
     * 
     * @return value
     */
    RFuture randomAsync();
    
    /**
     * Returns random elements from set limited by count
     *
     * @param count - values amount to return
     * @return value
     */
    RFuture> randomAsync(int count);

    /**
     * Move a member from this set to the given destination set in async mode.
     *
     * @param destination the destination set
     * @param member the member to move
     * @return true if the element is moved, false if the element is not a
     * member of this set or no operation was performed
     */
    RFuture moveAsync(String destination, V member);

    /**
     * Read all elements at once
     *
     * @return values
     */
    RFuture> readAllAsync();

    /**
     * Union sets specified by name and write to current set.
     * If current set already exists, it is overwritten.
     *
     * @param names - name of sets
     * @return size of union
     */
    RFuture unionAsync(String... names);

    /**
     * Union sets specified by name with current set.
     * Without current set state change.
     *
     * @param names - name of sets
     * @return values
     */
    RFuture> readUnionAsync(String... names);

    /**
     * Diff sets specified by name and write to current set.
     * If current set already exists, it is overwritten.
     *
     * @param names - name of sets
     * @return size of diff
     */
    RFuture diffAsync(String... names);

    /**
     * Diff sets specified by name with current set.
     * Without current set state change.
     * 
     * @param names - name of sets
     * @return values
     */
    RFuture> readDiffAsync(String... names);

    /**
     * Intersection sets specified by name and write to current set.
     * If current set already exists, it is overwritten.
     *
     * @param names - name of sets
     * @return size of intersection
     */
    RFuture intersectionAsync(String... names);

    /**
     * Intersection sets specified by name with current set.
     * Without current set state change.
     * 
     * @param names - name of sets
     * @return values
     */
    RFuture> readIntersectionAsync(String... names);
    
}