content: /*
   * 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
   *
   *     http://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 io.trino.plugin.functions;
  
  import io.airlift.slice.Slice;
  import io.airlift.slice.Slices;
  import io.trino.plugin.ai.AIService;
  import io.trino.spi.function.Description;
  import io.trino.spi.function.ScalarFunction;
  import io.trino.spi.function.SqlNullable;
  import io.trino.spi.function.SqlType;
  import io.trino.spi.type.StandardTypes;
  
  import java.io.IOException;
  
  public final class AILanguageDetection
  {
      private static final AIService service = new AIService(
              null,
              0.0,             // Low temperature
              60);
  
      private AILanguageDetection() {}
  
      @Description("Detect the language of the provided text")
      @ScalarFunction("ai_detect_language")
      @SqlType(StandardTypes.VARCHAR)
      @SqlNullable
      public static Slice aiDetectLanguage(@SqlType(StandardTypes.VARCHAR) Slice input)
              throws IOException
      {
          if (input == null || input.length() == 0) {
              return null;
          }
  
          String prompt = "Detect the language of the following text and respond with " +
                  "language code only e.g. 'en' for English, " +
                  "'de' for German, 'fr' for French etc: " + input.toStringUtf8();
          String response = service.getCompletion(prompt, "");
          return Slices.utf8Slice(response);
      }
  }
  