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.studio.admin.generator.service.generator.workflow.sections;
  
  import com.alibaba.cloud.ai.studio.admin.generator.model.workflow.Node;
  import com.alibaba.cloud.ai.studio.admin.generator.model.workflow.NodeType;
  import com.alibaba.cloud.ai.studio.admin.generator.model.workflow.nodedata.MiddleOutputNodeData;
  import com.alibaba.cloud.ai.studio.admin.generator.service.dsl.DSLDialectType;
  import com.alibaba.cloud.ai.studio.admin.generator.service.generator.workflow.NodeSection;
  import com.alibaba.cloud.ai.studio.admin.generator.utils.ObjectToCodeUtil;
  import org.springframework.stereotype.Component;
  
  import java.util.List;
  
  @Component
  public class MiddleOutputSection implements NodeSection<MiddleOutputNodeData> {
  
  	@Override
  	public boolean support(NodeType nodeType) {
  		return NodeType.MIDDLE_OUTPUT.equals(nodeType);
  	}
  
  	@Override
  	public String render(Node node, String varName) {
  		MiddleOutputNodeData nodeData = (MiddleOutputNodeData) node.getData();
  		return String.format("""
  				// -- MiddleOutputNode [%s] --
  				stateGraph.addNode("%s", AsyncNodeAction.node_async(
  				    createMiddleOutputNodeAction(%s, %s, %s))
  				);
  
  				""", varName, varName, ObjectToCodeUtil.toCode(nodeData.getOutputTemplate()),
  				ObjectToCodeUtil.toCode(nodeData.getVarKeys()), ObjectToCodeUtil.toCode(nodeData.getOutputKey()));
  	}
  
  	@Override
  	public String assistMethodCode(DSLDialectType dialectType) {
  		return switch (dialectType) {
  			case STUDIO ->
  				"""
  						private NodeAction createMiddleOutputNodeAction(String outputTemplate, List<String> keys, String outputKey) {
  						    return state -> {
  						        Map<String, Object> params = keys.stream()
  						                .collect(Collectors.toUnmodifiableMap(
  						                        key -> key,
  						                        key -> state.value(key).orElse(""),
  						                        (a, b) -> b
  						                ));
  						        String output = new PromptTemplate(outputTemplate).render(params);
  						        return Map.of(outputKey, output);
  						    };
  						}
  						""";
  			default -> NodeSection.super.assistMethodCode(dialectType);
  		};
  	}
  
  	@Override
  	public List<String> getImports() {
  		return List.of("java.util.stream.Collectors", "org.springframework.ai.chat.prompt.PromptTemplate");
  	}
  
  }
  