content: /*
   * Copyright 2024-2025 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 com.alibaba.cloud.ai.graph.node.code;
  
  import com.alibaba.cloud.ai.graph.node.code.entity.CodeStyle;
  import com.alibaba.cloud.ai.graph.node.code.entity.RunnerAndPreload;
  import com.fasterxml.jackson.databind.ObjectMapper;
  
  import java.nio.charset.StandardCharsets;
  import java.util.Base64;
  import java.util.Map;
  import java.util.regex.Matcher;
  import java.util.regex.Pattern;
  
  /**
   * @author HeYQ
   * @since 2025-01-06 22:14
   */
  public abstract class TemplateTransformer {
  
  	protected static final String CODE_PLACEHOLDER = "{{code}}";
  
  	protected static final String INPUTS_PLACEHOLDER = "{{inputs}}";
  
  	protected static final String RESULT_TAG = "<<RESULT>>";
  
  	public RunnerAndPreload transformCaller(String code, Map<String, Object> inputs, CodeStyle style) throws Exception {
  		String runnerScript = assembleRunnerScript(code, inputs, style);
  		String preloadScript = getPreloadScript();
  
  		return new RunnerAndPreload(runnerScript, preloadScript);
  	}
  
  	public Map<String, Object> transformResponse(String response) throws Exception {
  		String resultStr = extractResultStrFromResponse(response);
  		ObjectMapper mapper = new ObjectMapper();
  		return mapper.readValue(resultStr,
  				mapper.getTypeFactory().constructMapType(Map.class, String.class, Object.class));
  	}
  
  	public abstract String getRunnerScript(CodeStyle style);
  
  	private String extractResultStrFromResponse(String response) {
  		Pattern pattern = Pattern.compile(RESULT_TAG + "(.*?)" + RESULT_TAG, Pattern.DOTALL);
  		Matcher matcher = pattern.matcher(response);
  
  		if (matcher.find()) {
  			return matcher.group(1).trim();
  		}
  		else {
  			throw new IllegalArgumentException("Failed to parse result");
  		}
  	}
  
  	private String serializeInputs(Map<String, Object> inputs) throws Exception {
  		ObjectMapper mapper = new ObjectMapper();
  		String inputsJsonStr = mapper.writeValueAsString(inputs);
  		return Base64.getEncoder().encodeToString(inputsJsonStr.getBytes(StandardCharsets.UTF_8));
  	}
  
  	private String assembleRunnerScript(String code, Map<String, Object> inputs, CodeStyle style) throws Exception {
  		String script = getRunnerScript(style);
  		script = script.replace(CODE_PLACEHOLDER, code);
  		script = script.replace(INPUTS_PLACEHOLDER, serializeInputs(inputs));
  		return script;
  	}
  
  	private String getPreloadScript() {
  		return "";
  	}
  
  }
  