/*
 * Copyright 2011-2024 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
 *
 *      https://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.core;

import java.time.Duration;
import java.time.Instant;
import java.util.Date;
import java.util.concurrent.TimeUnit;

import org.springframework.data.redis.connection.DataType;
import org.springframework.lang.Nullable;
import org.springframework.util.Assert;

/**
 * Operations over a Redis key. Useful for executing common key-'bound' operations to all implementations.
 * <p>
 * As the rest of the APIs, if the underlying connection is pipelined or queued/in multi mode, all methods will return
 * {@literal null}.
 *
 * @author Costin Leau
 * @author Christoph Strobl
 * @author Mark Paluch
 */
public interface BoundKeyOperations<K> {

	/**
	 * Returns the key associated with this entity.
	 *
	 * @return key associated with the implementing entity
	 */
	K getKey();

	/**
	 * Returns the associated Redis type.
	 *
	 * @return key type. {@literal null} when used in pipeline / transaction.
	 */
	@Nullable
	DataType getType();

	/**
	 * Returns the expiration of this key.
	 *
	 * @return expiration value (in seconds). {@literal null} when used in pipeline / transaction.
	 */
	@Nullable
	Long getExpire();

	/**
	 * Sets the key time-to-live/expiration.
	 *
	 * @param timeout must not be {@literal null}.
	 * @return {@literal true} if expiration was set, {@literal false} otherwise. {@literal null} when used in pipeline /
	 *         transaction.
	 * @throws IllegalArgumentException if the timeout is {@literal null}.
	 * @since 2.3
	 */
	@Nullable
	default Boolean expire(Duration timeout) {

		Assert.notNull(timeout, "Timeout must not be null");

		return expire(timeout.toMillis(), TimeUnit.MILLISECONDS);
	}

	/**
	 * Sets the key time-to-live/expiration.
	 *
	 * @param timeout expiration value
	 * @param unit expiration unit
	 * @return true if expiration was set, false otherwise. {@literal null} when used in pipeline / transaction.
	 */
	@Nullable
	Boolean expire(long timeout, TimeUnit unit);

	/**
	 * Sets the key time-to-live/expiration.
	 *
	 * @param date expiration date
	 * @return true if expiration was set, false otherwise. {@literal null} when used in pipeline / transaction.
	 */
	@Nullable
	Boolean expireAt(Date date);

	/**
	 * Sets the key time-to-live/expiration.
	 *
	 * @param expireAt expiration time.
	 * @return {@literal true} if expiration was set, {@literal false} otherwise. {@literal null} when used in pipeline /
	 *         transaction.
	 * @throws IllegalArgumentException if the instant is {@literal null} or too large to represent as a {@code Date}.
	 * @since 2.3
	 */
	@Nullable
	default Boolean expireAt(Instant expireAt) {

		Assert.notNull(expireAt, "ExpireAt must not be null");

		return expireAt(Date.from(expireAt));
	}

	/**
	 * Removes the expiration (if any) of the key.
	 *
	 * @return true if expiration was removed, false otherwise. {@literal null} when used in pipeline / transaction.
	 */
	@Nullable
	Boolean persist();

	/**
	 * Renames the key. <br>
	 * <b>Note:</b> The new name for empty collections will be propagated on add of first element.
	 *
	 * @param newKey new key. Must not be {@literal null}.
	 */
	void rename(K newKey);
}
