const routing = require('../services/routing');
const logger = require('../utils/logger');

async function getDirections(req, res) {
  try {
    const { startLat, startLng, endLat, endLng, profile } = req.query;

    // Validate required parameters
    if (!startLat || !startLng || !endLat || !endLng) {
      return res.status(400).json({
        error: 'Missing required parameters: startLat, startLng, endLat, endLng'
      });
    }

    const start = {
      lat: parseFloat(startLat),
      lng: parseFloat(startLng)
    };
    const end = {
      lat: parseFloat(endLat),
      lng: parseFloat(endLng)
    };

    // Validate coordinates
    if (isNaN(start.lat) || isNaN(start.lng) || isNaN(end.lat) || isNaN(end.lng)) {
      return res.status(400).json({ error: 'Invalid coordinates' });
    }

    // Validate profile
    const validProfiles = ['driving', 'walking', 'cycling'];
    const routeProfile = validProfiles.includes(profile) ? profile : 'driving';

    const directions = await routing.getDirections(
      start.lat, start.lng,
      end.lat, end.lng,
      routeProfile
    );

    res.json({
      success: true,
      profile: routeProfile,
      route: directions
    });

  } catch (error) {
    logger.error('Directions request failed', { error: error.message });
    res.status(500).json({
      success: false,
      error: error.message
    });
  }
}

module.exports = {
  getDirections
};