import { ServiceError, DocumentMetadata } from '../types';
import { ollamaService } from './ollamaService';

export class LLMService {
  constructor() {
    ollamaService.updateBaseUrl('http://localhost:11434');
  }

  async query(
    question: string,
    onChunk?: (chunk: string) => void
  ): Promise<{ answer: string, sources: DocumentMetadata[] }> {
    try {
      const ollamaResponse = await ollamaService.chat({
        model: 'damien113/datahound-gpu:8b',
        messages: [{ role: 'user', content: question }],
        temperature: 0.7,
        onChunk,
      });

      /** @type {DocumentMetadata[]} */
      const sources = []; // TODO: Implement source retrieval from vector store

      return {
        answer: ollamaResponse.message.content,
        sources,
      };
    } catch (error) {
      console.error('Error querying LLM:', error);
      throw new ServiceError(
        error instanceof Error ? error.message : 'Unknown error occurred'
      );
    }
  }

  getConfig() {
    return {
      provider: 'ollama',
      model: 'damien113/datahound-gpu:8b',
      baseUrl: 'http://localhost:11434',
      temperature: 0.7
    };
  }
}

const llmService = new LLMService();
export { llmService };