29 lines
1.2 KiB
TypeScript
29 lines
1.2 KiB
TypeScript
import type { FastifyRequest } from 'fastify'
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import { readData } from '../data/store.js'
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import { dataFiles } from '../data/files.js'
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import { ApiError } from '../errors.js'
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import type { Question } from '../schemas/entities.js'
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import type { z } from 'zod'
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import { AiExplainBodySchema } from '../schemas/api.js'
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/**
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* AI 讲解：返回结构化的讲解结果。
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* TODO 任务11：组装题目上下文调用 OpenAI 兼容接口，超时或未配置 Token 时回退到题库解析。
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* 当前固定返回题库解析回退结果，保证接口契约与前端可以先联调。
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*/
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export async function explainQuestion(request: FastifyRequest) {
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const body = request.body as z.infer<typeof AiExplainBodySchema>
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const questions = await readData<Question[]>(dataFiles.questions, [])
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const question = questions.find((q) => q.id === body.questionId)
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if (!question) throw ApiError.notFound('题目不存在')
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return {
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source: 'fallback' as const,
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summary: `AI 讲解尚未接入，已回退到题库标准解析（用户答案：${body.userAnswer}）`,
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steps: [question.analysis],
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knowledgePoints: question.tags,
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commonMistakes: [],
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answer: question.answer
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}
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}
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