const express = require('express');
const prisma = require('../config/db');

const router = express.Router();

// GET /api/alerts?state=...&type=...&severity=...
router.get('/', async (req, res, next) => {
  try {
    const { state, type, severity } = req.query;
    const where = {};

    if (state) {
      where.state = { abbr: state.toUpperCase() };
    }
    if (type) {
      where.type = type;
    }
    if (severity) {
      where.severity = severity;
    }

    // Only show active alerts (endsAt is null or in the future)
    where.OR = [
      { endsAt: null },
      { endsAt: { gte: new Date() } },
    ];

    const alerts = await prisma.alert.findMany({
      where,
      include: { state: { select: { name: true, abbr: true } } },
      orderBy: [{ severity: 'desc' }, { startsAt: 'desc' }],
    });

    res.json(alerts);
  } catch (err) {
    next(err);
  }
});

// GET /api/alerts/:id
router.get('/:id', async (req, res, next) => {
  try {
    const alert = await prisma.alert.findUnique({
      where: { id: req.params.id },
      include: { state: { select: { name: true, abbr: true } } },
    });
    if (!alert) return res.status(404).json({ error: 'Alert not found.' });
    res.json(alert);
  } catch (err) {
    next(err);
  }
});

module.exports = router;