import 'dart:convert';
import 'dart:io';

void main() async {
  final origin = "401 route du camping, 69850 Saint Martin en haut";
  final destination = "652431, 6853241"; // Lambert 93 example

  final envFile = File('functions/.env');
  final lines = await envFile.readAsLines();
  String apiKey = '';
  for (var line in lines) {
    if (line.startsWith('API_MAPS=')) {
      apiKey = line.split('=')[1].replaceAll('"', '');
    }
  }

  final url = 'https://routes.googleapis.com/directions/v2:computeRoutes';
  final client = HttpClient();
  final request = await client.postUrl(Uri.parse(url));
  request.headers.set('Content-Type', 'application/json');
  request.headers.set('X-Goog-Api-Key', apiKey);
  request.headers.set('X-Goog-FieldMask', 'routes.distanceMeters,routes.duration,routes.polyline.encodedPolyline');
  
  final payload = jsonEncode({
    "travelMode": "DRIVE",
    "routingPreference": "TRAFFIC_AWARE",
    "origin": { "address": origin },
    "destination": { "address": destination }
  });
  
  request.write(payload);
  final response = await request.close();
  final responseBody = await response.transform(utf8.decoder).join();
  print(response.statusCode);
  print(responseBody);
}