content: /*
   * Copyright 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.core.utils;
  
  import com.alibaba.cloud.ai.studio.runtime.exception.BizException;
  import com.alibaba.cloud.ai.studio.runtime.domain.Error;
  import com.alibaba.cloud.ai.studio.runtime.utils.JsonUtils;
  import com.fasterxml.jackson.databind.JsonNode;
  import lombok.extern.slf4j.Slf4j;
  import org.springframework.http.client.ClientHttpResponse;
  import org.springframework.lang.NonNull;
  import org.springframework.util.StreamUtils;
  import org.springframework.web.client.ResponseErrorHandler;
  
  import java.io.IOException;
  import java.nio.charset.StandardCharsets;
  
  /**
   * Utility class for handling HTTP response errors from different model providers.
   * Provides standardized error handling for DashScope and OpenAI API responses.
   *
   * @since 1.0.0.3
   */
  @Slf4j
  public class ErrorHandlerUtils {
  
  	/**
  	 * Error handler for DashScope API responses. Converts HTTP error responses into
  	 * standardized BizException.
  	 */
  	public static final ResponseErrorHandler DASHSCOPE_RESPONSE_ERROR_HANDLER = new ResponseErrorHandler() {
  
  		@Override
  		public boolean hasError(@NonNull ClientHttpResponse response) throws IOException {
  			return response.getStatusCode().isError();
  		}
  
  		@Override
  		public void handleError(@NonNull ClientHttpResponse response) throws IOException {
  			if (response.getStatusCode().isError()) {
  				String body = StreamUtils.copyToString(response.getBody(), StandardCharsets.UTF_8);
  				JsonNode node = JsonUtils.fromJson(body);
  
  				String code = "ModelCall";
  				if (node.has("code")) {
  					code = node.get("code").asText();
  				}
  
  				String message;
  				if (node.has("message")) {
  					message = node.get("message").asText();
  				}
  				else {
  					message = body;
  				}
  
  				Error error = Error.builder()
  					.statusCode(response.getStatusCode().value())
  					.code(code)
  					.message(message)
  					.build();
  				throw new BizException(error);
  			}
  		}
  	};
  
  	/**
  	 * Error handler for OpenAI API responses. Converts HTTP error responses into
  	 * standardized BizException.
  	 */
  	public static final ResponseErrorHandler OPENAI_RESPONSE_ERROR_HANDLER = new ResponseErrorHandler() {
  
  		@Override
  		public boolean hasError(@NonNull ClientHttpResponse response) throws IOException {
  			return response.getStatusCode().isError();
  		}
  
  		@Override
  		public void handleError(@NonNull ClientHttpResponse response) throws IOException {
  			if (response.getStatusCode().isError()) {
  				String body = StreamUtils.copyToString(response.getBody(), StandardCharsets.UTF_8);
  				log.error("failed to call openai model, code: {}, body: {}", response.getStatusCode(), body);
  
  				Error error = parseOpenAiError(response.getStatusCode().value(), body);
  				throw new BizException(error);
  			}
  		}
  	};
  
  	public static Error parseOpenAiError(int statusCode, String body) {
  		JsonNode node = JsonUtils.fromJson(body);
  
  		String code = "ModelCall";
  		String message = "";
  		if (node.has("error")) {
  			node = node.get("error");
  			if (node.has("code")) {
  				code = node.get("code").asText();
  			}
  			if (node.has("message")) {
  				message = node.get("message").asText();
  			}
  		}
  		else {
  			message = body;
  		}
  
  		return Error.builder().statusCode(statusCode).code(code).message(message).build();
  	}
  
  }
  