package fr.tiogars.chat.domains.prompt.services;
   
   import fr.tiogars.chat.domains.prompt.models.PromptRequest;
   import fr.tiogars.chat.domains.prompt.models.PromptResponse;
   import org.springframework.stereotype.Service;
   
   import java.time.Duration;
   import java.time.Instant;
   
  /**
   * Service for handling AI prompts.
   * This service uses the ChatClientAdapter to communicate with AI models.
   */
  @Service
  public class PromptService {
  
      private final ChatClientAdapter chatClient;
  
      public PromptService(ChatClientAdapter chatClient) {
          this.chatClient = chatClient;
      }
  
      /**
       * Process a prompt request and return the AI response.
       *
       * @param request the prompt request
       * @return the AI response
       */
      public PromptResponse processPrompt(PromptRequest request) {
          Instant start = Instant.now();
  
          String response;
          if (request.systemPrompt() != null && !request.systemPrompt().isBlank()) {
              response = chatClient.call(request.systemPrompt(), request.prompt());
          } else {
              response = chatClient.call(request.prompt());
          }
  
          Instant end = Instant.now();
          long processingTimeMs = Duration.between(start, end).toMillis();
  
          return new PromptResponse(
                  response,
                  request.model() != null ? request.model() : "unknown",
                  response.length(),
                  processingTimeMs,
                  "stop"
          );
      }
  }