import 'dart:convert';

import 'package:api_cache_manager/api_cache_manager.dart';
import 'package:api_cache_manager/models/cache_db_model.dart';
import 'package:shared_preferences/shared_preferences.dart';

import '../model/weather_forecast_model.dart';
import 'package:http/http.dart' as http;

extension UnitToSystem on SharedPreferences {
  static final _unitToSystem = {
    "Celcius": "metric",
    "Fahrenheit": "imperial",
  };

  String getTemperatureSystem() {
    final unit = getString("temp");
    return _unitToSystem[unit] ?? "metric";
  }
}

class WeatherApiClient {
  late SharedPreferences sharedPreferences;

  Future<WeatherForecast>? getCurrentWeather(String? location) async {
    sharedPreferences = await SharedPreferences.getInstance();
    String unit = sharedPreferences.getTemperatureSystem();

    var endpoint = Uri.parse(
        "https://api.openweathermap.org/data/2.5/forecast?q=$location&cnt=40&units=$unit&appid=3b4815f56619515169c1cbb39a9eea8f");

    var response = await http.get(endpoint);
    var body = jsonDecode(response.body);
    WeatherForecast weatherForecast = WeatherForecast.fromJson(body);

    return weatherForecast;
  }

  Future<WeatherForecast>? getCurrentWeatherLocation(
      double? lat, double? lng) async {
    sharedPreferences = await SharedPreferences.getInstance();

    var isCacheExist =
        await APICacheManager().isAPICacheKeyExist("API_WeatherForecast");

    if (!isCacheExist) {
      String unit = sharedPreferences.getTemperatureSystem();

      var endpointLatLong = Uri.parse(
          "https://api.openweathermap.org/data/2.5/forecast?lat=$lat&lon=$lng&cnt=40&units=$unit&appid=3b4815f56619515169c1cbb39a9eea8f");

      var response = await http.get(endpointLatLong);
      var body = jsonDecode(response.body);
      WeatherForecast weatherForecast = WeatherForecast.fromJson(body);

      APICacheDBModel cacheDBModel =
          APICacheDBModel(key: "API_WeatherForecast", syncData: response.body);

      await APICacheManager().addCacheData(cacheDBModel);

      return weatherForecast;
    } else {
      var cacheData =
          await APICacheManager().getCacheData("API_WeatherForecast");

      String unit = sharedPreferences.getTemperatureSystem();

      var endpointLatLong = Uri.parse(
          "https://api.openweathermap.org/data/2.5/forecast?lat=$lat&lon=$lng&cnt=40&units=$unit&appid=3b4815f56619515169c1cbb39a9eea8f");

      var response = await http.get(endpointLatLong);
      // var body = jsonDecode(cacheData.syncData);
      var body = jsonDecode(response.body);
      WeatherForecast weatherForecast = WeatherForecast.fromJson(body);

      return weatherForecast;
    }
  }
}