const express = require('express');
const router = express.Router();
const { db } = require('../activityDb');

// GET /api/presets - Get all presets for the active agent and page mode
router.get('/', (req, res) => {
  try {
    const agentId = parseInt(req.headers['x-agent-id'] || '1', 10);
    const { page_mode } = req.query; // 'general' or 'my'

    if (!page_mode) {
      return res.status(400).json({ error: 'Il parametro page_mode è obbligatorio' });
    }

    const presets = db.prepare(`
      SELECT * FROM filter_presets
      WHERE agent_id = ? AND page_mode = ?
      ORDER BY name ASC
    `).all(agentId, page_mode);

    res.json(presets);
  } catch (err) {
    res.status(500).json({ error: 'Errore nel caricamento dei preset', message: err.message });
  }
});

// POST /api/presets - Save a new filter preset
router.post('/', (req, res) => {
  try {
    const agentId = parseInt(req.headers['x-agent-id'] || '1', 10);
    const { name, page_mode, filters } = req.body;

    if (!name || !page_mode || !filters) {
      return res.status(400).json({ error: 'I campi name, page_mode e filters sono obbligatori' });
    }

    const filtersJson = typeof filters === 'string' ? filters : JSON.stringify(filters);

    const info = db.prepare(`
      INSERT INTO filter_presets (agent_id, name, page_mode, filters_json)
      VALUES (?, ?, ?, ?)
    `).run(agentId, name, page_mode, filtersJson);

    res.json({
      id: info.lastInsertRowid,
      agent_id: agentId,
      name,
      page_mode,
      filters_json: filtersJson
    });
  } catch (err) {
    res.status(500).json({ error: 'Errore nel salvataggio del preset', message: err.message });
  }
});

// DELETE /api/presets/:id - Delete a preset
router.delete('/:id', (req, res) => {
  try {
    const { id } = req.params;
    const info = db.prepare('DELETE FROM filter_presets WHERE id = ?').run(id);

    if (info.changes === 0) {
      return res.status(404).json({ error: 'Preset non trovato' });
    }

    res.json({ success: true, message: 'Preset eliminato con successo' });
  } catch (err) {
    res.status(500).json({ error: 'Errore nella rimozione del preset', message: err.message });
  }
});

module.exports = router;