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 java.util.List;
  import java.util.stream.Collectors;
  import java.util.stream.Stream;
  
  import com.alibaba.cloud.ai.studio.admin.generator.model.VariableSelector;
  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.EndNodeData;
  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;
  
  @Component
  public class EndNodeSection implements NodeSection<EndNodeData> {
  
  	@Override
  	public boolean support(NodeType nodeType) {
  		return NodeType.END.equals(nodeType);
  	}
  
  	@Override
  	public String render(Node node, String varName) {
  		EndNodeData data = (EndNodeData) node.getData();
  		String outputKey = data.getOutputKey();
  		List<VariableSelector> selector = data.getInputs();
  		String id = node.getId();
  		StringBuilder sb = new StringBuilder();
  		sb.append("// EndNode [ ").append(id).append(" ]\n");
  
  		String codeStr;
  		if ("text".equalsIgnoreCase(data.getOutputType())) {
  			// 如果输出类型为text，则使用对应的输出模板输出最终结果
  			if (data.getTextTemplateVars().isEmpty()) {
  				codeStr = String.format("state -> Map.of(\"%s\", %s)", data.getOutputKey(),
  						ObjectToCodeUtil.toCode(data.getTextTemplate()));
  			}
  			else {
  				codeStr = String.format("""
  						state -> {
  						    String template = %s;
  						    Map<String, Object> params = %s.stream()
  						            .collect(Collectors.toMap(
  						                    key -> key,
  						                    key -> state.value(key).orElse(""),
  						                    (o1, o2) -> o2));
  						    template = new PromptTemplate(template).render(params);
  						    return Map.of("%s", template);
  						}
  
  						""", ObjectToCodeUtil.toCode(data.getTextTemplate()),
  						ObjectToCodeUtil.toCode(data.getTextTemplateVars()), data.getOutputKey());
  			}
  		}
  		else {
  			codeStr = String.format("""
  					state -> Map.of("%s", Map.of(%s))
  					""", outputKey,
  					selector.stream()
  						.flatMap(v -> Stream.of(String.format("\"%s\"", v.getLabel()),
  								String.format("state.value(\"%s\").orElse(\"\")", v.getNameInCode())))
  						.collect(Collectors.joining(", ")));
  		}
  
  		// 最终节点用于输出用户选中的变量
  		sb.append("stateGraph.addNode(\"")
  			.append(varName)
  			.append("\", AsyncNodeAction.node_async(")
  			.append(codeStr)
  			.append("));");
  		sb.append(String.format("%n"));
  		return sb.toString();
  	}
  
  	@Override
  	public List<String> getImports() {
  		return List.of("java.util.stream.Stream", "java.util.stream.Collectors",
  				"org.springframework.ai.chat.prompt.PromptTemplate");
  	}
  
  }
  