const express = require('express');
const router = express.Router();
const { authenticateToken } = require('./auth');

// Require admin helper
const requireAdmin = (req, res, next) => {
  const userRole = req.headers['user-role'] || req.body.role;
  if (userRole !== 'admin') {
    return res.status(403).json({ error: 'Admin access required' });
  }
  next();
};

router.put('/admin/weeks/:category/:week/visibility', authenticateToken, requireAdmin, async (req, res) => {
  try {
    const WeekBrief = require('../models/WeekBrief');
    const category = (req.params.category === 'tutorial') ? 'tutorial' : 'weekly-practice';
    const weekNumber = parseInt(req.params.week);
    const { hidden } = req.body || {};
    const updated = await WeekBrief.findOneAndUpdate(
      { category, weekNumber },
      { hidden: !!hidden },
      { upsert: true, new: true }
    );
    res.json({ success: true, week: updated });
  } catch (error) {
    console.error('Update week visibility error:', error);
    res.status(500).json({ error: 'Failed to update week visibility' });
  }
});

router.get('/admin/weeks/:category/:week/visibility', authenticateToken, requireAdmin, async (req, res) => {
  try {
    const WeekBrief = require('../models/WeekBrief');
    const category = (req.params.category === 'tutorial') ? 'tutorial' : 'weekly-practice';
    const weekNumber = parseInt(req.params.week);
    const wb = await WeekBrief.findOne({ category, weekNumber });
    res.json({ success: true, week: { category, weekNumber, hidden: !!(wb && wb.hidden) } });
  } catch (error) {
    console.error('Get week visibility error:', error);
    res.status(500).json({ error: 'Failed to get week visibility' });
  }
});

module.exports = router;