// Local
import '/var/secrets.dart';
import '/var/locals.dart';

// Flutter / Dart
import 'package:flutter/material.dart';
import 'package:http/http.dart' as http;
import 'dart:convert';

void main() {
  runApp(const MainApp());
}

final String loadText = "Loading...";

class MainApp extends StatefulWidget {
  const MainApp({super.key});

  @override
  State<MainApp> createState() => _MainAppState();
}

class _MainAppState extends State<MainApp> {
  String weather = loadText;
  bool keepLoading = false;
  DateTime lastLoadTime = DateTime.now().subtract(Duration(seconds: 5));

  @override
  void initState() {
    super.initState();
    _refreshWeather();
  }

  @override
  void dispose() {
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    Widget weatherLayout = Column(
      children: [Text(weather), CircularProgressIndicator()],
    );

    if (weather == loadText) {
      Future.delayed(Duration(seconds: 1), () {
        setState(() {
          keepLoading = true;
        });
      });
    } else {
      weatherLayout = Column(
        children: [
          TextButton.icon(
            label: Text("Reload Weather"),
            onPressed: () {
              setState(() {
                _refreshWeather();
              });
            },
          ),
          Text(weather),
        ],
      );
    }

    return MaterialApp(
      home: Scaffold(
        body: Center(
          child: Column(children: [Text('Weather Today!'), weatherLayout]),
        ),
      ),
    );
  }

  // How to guide:
  //   https://openweathermap.org/current#zip
  Future<String> _hitOpenWeather(String zipCode, String? countryCode) async {
    countryCode ??= "US";

    String url =
        'https://api.openweathermap.org/data/2.5/forecast'
        '?zip=$zipCode,$countryCode'
        '&units=imperial'
        '&appid=$openWeatherKey';

    if (debug) debugPrint(url);
    http.Response response = await http.get(Uri.parse(url));

    String data = "";
    if (response.statusCode == 200) {
      data = response.body;
      var decodedData = jsonDecode(data);
      //if (debug) debugPrint(decodedData.toString());
      data = decodedData.toString();
    } else {
      if (debug) debugPrint(response.statusCode.toString());
    }

    return data;
  }

  _callOpenWeather() async {
    weather = await _hitOpenWeather("47630", "US");
  }

  _refreshWeather() {
    var lastReloadSeconds = DateTime.now().difference(lastLoadTime).inSeconds;
    if (debug) debugPrint("DEBUG: Refresh was $lastReloadSeconds seconds ago.");

    if (lastReloadSeconds < 5) {
      debugPrint("DEBUG: Skipping reload.");
      // TODO / TBD: Show a toast / scaffold snackbar that it cannot reload yet,
      //             or change the button text to "Please wait X seconds!".
      return;
    }

    weather = loadText;
    _callOpenWeather();
    lastLoadTime = DateTime.now();
  }
}