import { Injectable, Logger, NotFoundException } from '@nestjs/common';
import { ActiveRecallRepository } from './active-recall.repository';
import { ActiveRecallAnalysisWorkflow } from '../ai/workflows/active-recall-analysis.workflow';

@Injectable()
export class ActiveRecallService {
  private readonly logger = new Logger(ActiveRecallService.name);

  constructor(
    private readonly repository: ActiveRecallRepository,
    private readonly analysisWorkflow: ActiveRecallAnalysisWorkflow,
  ) {}

  async findByUserId(userId: string) {
    return this.repository.findByUserId(userId);
  }

  async submit(userId: string, questionId: string, body: { answerText: string }) {
    const question = await this.repository.findById(questionId);
    if (!question) throw new NotFoundException('问题不存在');

    const answer = await this.repository.createAnswer(userId, questionId, body);

    this.analysisWorkflow.execute({
      userId,
      questionText: question.questionText,
      knowledgeItemContent: '',
      userAnswer: body.answerText,
    }).then((result) => {
      this.logger.log(`Analysis complete for answer ${answer.id}: score=${result.score}`);
    }).catch((err) => {
      this.logger.error(`Analysis failed for answer ${answer.id}: ${err.message}`);
    });

    return answer;
  }
}