import express from 'express';
import cors from 'cors';
import { getValue, setValue } from './db.js';

const app = express();
app.use(cors());
app.use(express.json({ limit: '5mb' }));

const PORT = process.env.PORT || 4001;
const STORAGE_KEY = 'hospital-data-v1';

app.get('/api/state', async (req, res) => {
  try {
    const v = await getValue(STORAGE_KEY);
    if (!v) return res.json(null);
    res.json(JSON.parse(v));
  } catch (err) {
    console.error(err);
    res.status(500).json({ error: 'failed to read state' });
  }
});

app.put('/api/state', async (req, res) => {
  try {
    const body = req.body;
    await setValue(STORAGE_KEY, JSON.stringify(body));
    res.json({ ok: true });
  } catch (err) {
    console.error(err);
    res.status(500).json({ error: 'failed to save state' });
  }
});

app.listen(PORT, () => {
  console.log(`API server listening on http://localhost:${PORT}`);
});