/*
 * Copyright 2024-2024 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.ai.chat.memory;

import java.util.List;

import org.springframework.ai.chat.messages.Message;

/**
 * The ChatMemory interface represents a storage for chat conversation history. It
 * provides methods to add messages to a conversation, retrieve messages from a
 * conversation, and clear the conversation history.
 *
 * @author Christian Tzolov
 * @since 1.0.0
 */
public interface ChatMemory {

	default void add(String conversationId, Message message) {
		this.add(conversationId, List.of(message));
	}

	void add(String conversationId, List<Message> messages);

	List<Message> get(String conversationId, int lastN);

	void clear(String conversationId);

}