weather.dart

import 'package:http/http.dart' as http;
import 'dart:convert';

const apiKey = 'my-secret-api-key';

class Weather {
  final int temp;
  final int condition;
  final String city;

  Weather._(this.temp, this.condition, this.city);

  String getWeatherIcon() {
    if (condition < 300) {
      return '🌩';
    } else if (condition < 400) {
      return '🌧';
    } else if (condition < 600) {
      return '☔️';
    } else if (condition < 700) {
      return '☃️';
    } else if (condition < 800) {
      return '🌫';
    } else if (condition == 800) {
      return '☀️';
    } else if (condition <= 804) {
      return '☁️';
    } else {
      return '🤷‍';
    }
  }

  String getMessage() {
    if (temp > 25) {
      return 'It\'s 🍦 time';
    } else if (temp > 20) {
      return 'Time for shorts and 👕';
    } else if (temp < 10) {
      return 'You\'ll need 🧣 and 🧤';
    } else {
      return 'Bring a 🧥 just in case';
    }
  }

  @override
  String toString() {
    return 'temp: $temp, condition: $condition, city: $city';
  }

  static Future<Weather> create(
      {required double lat, required double lon}) async {
    Uri url = Uri.https('api.openweathermap.org', 'data/2.5/weather', {
      'lat': lat.toString(),
      'lon': lon.toString(),
      'appid': apiKey,
      'units': 'metric'
    });

    http.Response resp = await http.get(url);

    if (resp.statusCode != 200) {
      throw 'got statusCode $resp.statusCode';
    }
    final data = jsonDecode(resp.body);
    final double temp = data['main']['temp'];
    final int condition = data['weather'][0]['id'];
    final String city = data['name'];
    return Weather._(temp.toInt(), condition, city);
  }
}