/**
 * Devices Routes
 * All routes related to device management
 */

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

/**
 * GET /api/device-types
 * Get all device types
 */
router.get('/types', (req, res, next) => {
  try {
    const types = db.getAllDeviceTypes();
    res.json(types);
  } catch (err) {
    next(err);
  }
});

/**
 * GET /api/devices
 * Get all devices for a project
 */
router.get('/', (req, res, next) => {
  try {
    const projectId = req.query.projectId || 1;
    const devices = db.getAllDevices(projectId);
    res.json(devices);
  } catch (err) {
    next(err);
  }
});

/**
 * GET /api/devices/:id/used-ports
 * Get used ports for a device
 */
router.get('/:id/used-ports', (req, res, next) => {
  try {
    const ports = db.getUsedPorts(req.params.id);
    res.json(ports);
  } catch (err) {
    next(err);
  }
});

/**
 * POST /api/devices
 * Create a new device
 */
router.post('/', (req, res, next) => {
  try {
    const { deviceTypeId, rackId, position, name } = req.body;

    // Validation
    if (!deviceTypeId) {
      return res.status(400).json({ error: 'Device type ID is required' });
    }
    if (!rackId) {
      return res.status(400).json({ error: 'Rack ID is required' });
    }
    if (typeof position !== 'number' || position < 1 || position > config.rack.slots) {
      return res.status(400).json({
        error: `Position must be between 1 and ${config.rack.slots}`
      });
    }
    if (!name || name.trim().length === 0) {
      return res.status(400).json({ error: 'Device name is required' });
    }

    // Get project_id from the rack
    const rack = db.db.prepare('SELECT project_id FROM racks WHERE id = ?').get(rackId);
    if (!rack) {
      return res.status(404).json({ error: 'Rack not found' });
    }

    const device = db.createDevice(deviceTypeId, rackId, rack.project_id, position, name.trim());
    res.status(201).json(device);
  } catch (err) {
    next(err);
  }
});

/**
 * PUT /api/devices/:id/rack
 * Update device rack and position
 */
router.put('/:id/rack', (req, res, next) => {
  try {
    const { rackId, position } = req.body;

    if (!rackId) {
      return res.status(400).json({ error: 'Rack ID is required' });
    }
    if (typeof position !== 'number' || position < 1 || position > config.rack.slots) {
      return res.status(400).json({
        error: `Position must be between 1 and ${config.rack.slots}`
      });
    }

    db.updateDeviceRack(req.params.id, rackId, position);
    res.json({ success: true });
  } catch (err) {
    next(err);
  }
});

/**
 * PUT /api/devices/:id/logical-position
 * Update device logical view position
 */
router.put('/:id/logical-position', (req, res, next) => {
  try {
    const { x, y } = req.body;

    if (typeof x !== 'number' || typeof y !== 'number') {
      return res.status(400).json({ error: 'Valid x and y coordinates are required' });
    }

    db.updateDeviceLogicalPosition(req.params.id, x, y);
    res.json({ success: true });
  } catch (err) {
    next(err);
  }
});

/**
 * PUT /api/devices/:id/name
 * Update device name
 */
router.put('/:id/name', (req, res, next) => {
  try {
    const { name } = req.body;

    if (!name || name.trim().length === 0) {
      return res.status(400).json({ error: 'Device name is required' });
    }

    db.updateDeviceName(req.params.id, name.trim());
    res.json({ success: true });
  } catch (err) {
    next(err);
  }
});

/**
 * PUT /api/devices/:id/rack-units
 * Update device rack units (form factor)
 */
router.put('/:id/rack-units', (req, res, next) => {
  try {
    const { rackUnits } = req.body;
    const min = config.device.minRackUnits || 1;
    const max = config.device.maxRackUnits || config.rack.slots;

    if (typeof rackUnits !== 'number' || rackUnits < min || rackUnits > max) {
      return res.status(400).json({
        error: `Rack units must be between ${min} and ${max}`
      });
    }

    db.updateDeviceRackUnits(req.params.id, rackUnits);
    res.json({ success: true });
  } catch (err) {
    next(err);
  }
});

/**
 * DELETE /api/devices/:id
 * Delete a device
 */
router.delete('/:id', (req, res, next) => {
  try {
    db.deleteDevice(req.params.id);
    res.json({ success: true });
  } catch (err) {
    next(err);
  }
});

module.exports = router;