content: /*
   *  Copyright (c) 2023-2025, Agents-Flex (fuhai999@gmail.com).
   *  <p>
   *  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
   *  <p>
   *  http://www.apache.org/licenses/LICENSE-2.0
   *  <p>
   *  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.agentsflex.llm.ollama;
  
  import com.agentsflex.core.document.Document;
  import com.agentsflex.core.llm.BaseLlm;
  import com.agentsflex.core.llm.ChatOptions;
  import com.agentsflex.core.llm.StreamResponseListener;
  import com.agentsflex.core.llm.client.BaseLlmClientListener;
  import com.agentsflex.core.llm.client.HttpClient;
  import com.agentsflex.core.llm.client.LlmClientListener;
  import com.agentsflex.core.llm.client.impl.DnjsonClient;
  import com.agentsflex.core.llm.embedding.EmbeddingOptions;
  import com.agentsflex.core.llm.response.AiMessageResponse;
  import com.agentsflex.core.message.AiMessage;
  import com.agentsflex.core.parser.AiMessageParser;
  import com.agentsflex.core.prompt.Prompt;
  import com.agentsflex.core.store.VectorData;
  import com.agentsflex.core.util.LogUtil;
  import com.agentsflex.core.util.Maps;
  import com.agentsflex.core.util.StringUtil;
  import com.alibaba.fastjson.JSON;
  import com.alibaba.fastjson.JSONObject;
  import com.alibaba.fastjson.JSONPath;
  
  import java.util.HashMap;
  import java.util.Map;
  
  public class OllamaLlm extends BaseLlm<OllamaLlmConfig> {
  
      private HttpClient httpClient = new HttpClient();
      public AiMessageParser aiMessageParser = OllamaLlmUtil.getAiMessageParser();
  
  
      public OllamaLlm(OllamaLlmConfig config) {
          super(config);
      }
  
  
      @Override
      public VectorData embed(Document document, EmbeddingOptions options) {
          Map<String, String> headers = new HashMap<>();
          headers.put("Content-Type", "application/json");
  
          if (StringUtil.hasText(getConfig().getApiKey())) {
              headers.put("Authorization", "Bearer " + getConfig().getApiKey());
          }
  
          String payload = Maps.of("model", options.getModelOrDefault(config.getModel()))
              .set("input", document.getContent())
              .toJSON();
  
          String endpoint = config.getEndpoint();
          // https://github.com/ollama/ollama/blob/main/docs/api.md#generate-embeddings
          String response = httpClient.post(endpoint + "/api/embed", headers, payload);
  
          if (config.isDebug()) {
              LogUtil.println(">>>>receive payload:" + response);
          }
  
          if (StringUtil.noText(response)) {
              return null;
          }
          VectorData vectorData = new VectorData();
  
          double[] embedding = JSONPath.read(response, "$.embeddings[0]", double[].class);
          vectorData.setVector(embedding);
  
          vectorData.addMetadata("total_duration", JSONPath.read(response, "$.total_duration", Long.class));
          vectorData.addMetadata("load_duration", JSONPath.read(response, "$.load_duration", Long.class));
          vectorData.addMetadata("prompt_eval_count", JSONPath.read(response, "$.prompt_eval_count", Integer.class));
          vectorData.addMetadata("model", JSONPath.read(response, "$.model", String.class));
  
          return vectorData;
      }
  
      @Override
      public AiMessageResponse chat(Prompt prompt, ChatOptions options) {
          Map<String, String> headers = new HashMap<>();
          headers.put("Content-Type", "application/json");
          headers.put("Authorization", "Bearer " + config.getApiKey());
  
          String endpoint = config.getEndpoint();
          String payload = OllamaLlmUtil.promptToPayload(prompt, config, options, false);
          String response = httpClient.post(endpoint + "/api/chat", headers, payload);
  
          if (config.isDebug()) {
              LogUtil.println(">>>>receive payload:" + response);
          }
  
          if (StringUtil.noText(response)) {
              return AiMessageResponse.error(prompt, response, "no content for response.");
          }
  
          JSONObject jsonObject = JSON.parseObject(response);
          String error = jsonObject.getString("error");
  
          AiMessage aiMessage = aiMessageParser.parse(jsonObject);
          AiMessageResponse messageResponse = new AiMessageResponse(prompt, response, aiMessage);
  
          if (error != null && !error.isEmpty()) {
              messageResponse.setError(true);
              messageResponse.setErrorMessage(error);
          }
  
          return messageResponse;
      }
  
  
      @Override
      public void chatStream(Prompt prompt, StreamResponseListener listener, ChatOptions options) {
          DnjsonClient dnjsonClient = new DnjsonClient();
          Map<String, String> headers = new HashMap<>();
          headers.put("Content-Type", "application/json");
          headers.put("Authorization", "Bearer " + config.getApiKey());
  
          String payload = OllamaLlmUtil.promptToPayload(prompt, config, options, true);
  
          String endpoint = config.getEndpoint();
          LlmClientListener clientListener = new BaseLlmClientListener(this, dnjsonClient, listener, prompt, aiMessageParser);
          dnjsonClient.start(endpoint + "/api/chat", headers, payload, clientListener, config);
      }
  
      public HttpClient getHttpClient() {
          return httpClient;
      }
  
      public void setHttpClient(HttpClient httpClient) {
          this.httpClient = httpClient;
      }
  }
  