frontend/src/api.js

// In production set VITE_API_BASE to your HF Space URL in the Vercel dashboard.
// Locally it falls back to the uvicorn dev server.
const API_BASE = import.meta.env.VITE_API_BASE || 'http://127.0.0.1:8000';

export const parseDocument = async (file) => {
  const formData = new FormData();
  formData.append('file', file);
  const res = await fetch(`${API_BASE}/parse-document`, {
    method: 'POST',
    body: formData,
  });
  if (!res.ok) throw new Error('Failed to parse document');
  return res.json();
};

export const generateQuiz = async (payload) => {
  const res = await fetch(`${API_BASE}/generate-quiz`, {
    method: 'POST',
    headers: { 'Content-Type': 'application/json' },
    body: JSON.stringify(payload),
  });
  if (!res.ok) throw new Error('Failed to generate quiz');
  return res.json();
};

export const submitQuiz = async (quizId, answers) => {
  const res = await fetch(`${API_BASE}/submit-quiz`, {
    method: 'POST',
    headers: { 'Content-Type': 'application/json' },
    body: JSON.stringify({ quiz_id: quizId, answers }),
  });
  if (res.status === 404) throw new Error('Quiz expired');
  if (!res.ok) throw new Error('Submission failed');
  return res.json();
};