content: /**
   * Copyright (C) 2024 AIDC-AI
   *
   * 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 com.alibaba.langengine.redis.memory;
  
  import java.util.ArrayList;
  import java.util.List;
  import java.util.Objects;
  import java.util.stream.Collectors;
  
  import com.alibaba.langengine.core.prompt.MessageInfoDO;
  import com.alibaba.langengine.core.memory.BaseChatMessageHistory;
  import com.alibaba.langengine.core.messages.AIMessage;
  import com.alibaba.langengine.core.messages.BaseMessage;
  import com.alibaba.langengine.core.messages.ChatMessage;
  import com.alibaba.langengine.core.messages.HumanMessage;
  import com.alibaba.langengine.core.messages.SystemMessage;
  import com.alibaba.langengine.core.messages.ToolMessage;
  
  import com.alibaba.langengine.redis.memory.cache.RedisCache;
  import lombok.Data;
  
  /**
   * redis消息历史记录
   *
   * @author liuchunhe.lch on 2023/9/2 09:52
   */
  @Data
  public class ChatMessageRedisHistory extends BaseChatMessageHistory {
  
      private RedisCache redisCache;
  
      @Override
      public void setMessages(String sessionId, List<BaseMessage> messages) {
          if(sessionId == null) {
              sessionId = this.getSessionId();
          }
          List<MessageInfoDO> messageInfoDOs = messages.stream().map(message -> {
              MessageInfoDO messageInfoDO = new MessageInfoDO();
              if (message instanceof HumanMessage) {
                  messageInfoDO.setRole("Human");
              } else if (message instanceof AIMessage) {
                  messageInfoDO.setRole("AI");
              } else if (message instanceof SystemMessage) {
                  messageInfoDO.setRole("System");
              } else if (message instanceof ToolMessage) {
                  messageInfoDO.setRole("Tool");
              } else if (message instanceof ChatMessage) {
                  messageInfoDO.setRole(((ChatMessage)message).getRole());
              } else {
                  return null;
              }
              messageInfoDO.setContent(message.getContent());
              return messageInfoDO;
          }).filter(Objects::nonNull).collect(Collectors.toList());
          // Update messages in Redis
          redisCache.updateMessageInfo(sessionId, messageInfoDOs);
      }
  
      @Override
      public List<BaseMessage> getRawMessages(String sessionId) {
          if(sessionId == null) {
              sessionId = this.getSessionId();
          }
          List<MessageInfoDO> messageInfoDOs = redisCache.getMessageInfo(sessionId);
          if (messageInfoDOs == null) {
              return new ArrayList<>();
          }
          return messageInfoDOs.stream().map(messageInfoDO -> {
              if (messageInfoDO.getRole().equals("Human")) {
                  HumanMessage humanMessage = new HumanMessage();
                  humanMessage.setContent(messageInfoDO.getContent());
                  return humanMessage;
              } else if (messageInfoDO.getRole().equals("AI")) {
                  AIMessage aiMessage = new AIMessage();
                  aiMessage.setContent(messageInfoDO.getContent());
                  return aiMessage;
              } else if (messageInfoDO.getRole().equals("System")) {
                  SystemMessage systemMessage = new SystemMessage();
                  systemMessage.setContent(messageInfoDO.getContent());
                  return systemMessage;
              } else if (messageInfoDO.getRole().equals("Tool")) {
                  ToolMessage toolMessage = new ToolMessage();
                  toolMessage.setContent(messageInfoDO.getContent());
                  return toolMessage;
              } else {
                  ChatMessage chatMessage = new ChatMessage();
                  chatMessage.setRole(messageInfoDO.getRole());
                  chatMessage.setContent(messageInfoDO.getContent());
              }
              return null;
          }).filter(e -> e != null).collect(Collectors.toList());
      }
  
      @Override
      public void addSystemMessage(String sessionId, String message) {
          List<MessageInfoDO> allMessageInfoDOs = new ArrayList<>();
          if(sessionId == null) {
              sessionId = this.getSessionId();
          }
          List<MessageInfoDO> messageInfoDOs = redisCache.getMessageInfo(sessionId);
          if (messageInfoDOs != null) {
              allMessageInfoDOs.addAll(messageInfoDOs);
          }
          MessageInfoDO messageInfoDO = new MessageInfoDO();
          messageInfoDO.setSessionId(sessionId);
          messageInfoDO.setRole("System");
          messageInfoDO.setContent(message);
          allMessageInfoDOs.add(messageInfoDO);
          redisCache.updateMessageInfo(sessionId, allMessageInfoDOs);
      }
  
      @Override
      public void addUserMessage(String sessionId, String message) {
          List<MessageInfoDO> allMessageInfoDOs = new ArrayList<>();
          if(sessionId == null) {
              sessionId = this.getSessionId();
          }
          List<MessageInfoDO> messageInfoDOs = redisCache.getMessageInfo(sessionId);
          if (messageInfoDOs != null) {
              allMessageInfoDOs.addAll(messageInfoDOs);
          }
          MessageInfoDO messageInfoDO = new MessageInfoDO();
          messageInfoDO.setSessionId(sessionId);
          messageInfoDO.setRole("Human");
          messageInfoDO.setContent(message);
          allMessageInfoDOs.add(messageInfoDO);
          redisCache.updateMessageInfo(sessionId, allMessageInfoDOs);
      }
  
      @Override
      public void addAIMessage(String sessionId, String message) {
          List<MessageInfoDO> allMessageInfoDOs = new ArrayList<>();
          if(sessionId == null) {
              sessionId = this.getSessionId();
          }
          List<MessageInfoDO> messageInfoDOs = redisCache.getMessageInfo(sessionId);
          if (messageInfoDOs != null) {
              allMessageInfoDOs.addAll(messageInfoDOs);
          }
          MessageInfoDO messageInfoDO = new MessageInfoDO();
          messageInfoDO.setSessionId(sessionId);
          messageInfoDO.setRole("AI");
          messageInfoDO.setContent(message);
          allMessageInfoDOs.add(messageInfoDO);
          redisCache.updateMessageInfo(sessionId, allMessageInfoDOs);
      }
  
      @Override
      public void addToolMessage(String sessionId, String message) {
          List<MessageInfoDO> allMessageInfoDOs = new ArrayList<>();
          if(sessionId == null) {
              sessionId = this.getSessionId();
          }
          List<MessageInfoDO> messageInfoDOs = redisCache.getMessageInfo(sessionId);
          if (messageInfoDOs != null) {
              allMessageInfoDOs.addAll(messageInfoDOs);
          }
          MessageInfoDO messageInfoDO = new MessageInfoDO();
          messageInfoDO.setSessionId(sessionId);
          messageInfoDO.setRole("Tool");
          messageInfoDO.setContent(message);
          allMessageInfoDOs.add(messageInfoDO);
          redisCache.updateMessageInfo(sessionId, allMessageInfoDOs);
      }
  
      @Override
      public void clear(String sessionId) {
          if(sessionId == null) {
              sessionId = this.getSessionId();
          }
          redisCache.remove(sessionId);
      }
  }
  