// Local
import 'dart:convert';

//import '/var/secrets.dart';
import '/var/config.dart';
import 'helpers/http.dart';
import 'helpers/json.dart';

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

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> {
  final _formKey = GlobalKey<FormState>();
  String _zipcode = "";
  String _city = "";
  String _country = "";
  String _latlong = "";

  String weather = loadText;
  bool keepLoading = false;
  DateTime lastLoadTime = DateTime.now().subtract(
    Duration(seconds: limitRefreshSeconds),
  );

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

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

  @override
  Widget build(BuildContext context) {
    Widget form = Form(
      key: _formKey,
      child: Column(
        mainAxisSize: MainAxisSize.min,
        children: [
          Row(
            mainAxisSize: MainAxisSize.min,
            children: [
              SizedBox(
                height: 20,
                width: 100,
                child: TextFormField(
                  initialValue: _zipcode,
                  validator: (value) {
                    return null;
                  },
                  onSaved: (value) {
                    _zipcode = value!;
                  },
                ),
              ),
              SizedBox(
                height: 20,
                width: 100,
                child: TextFormField(
                  initialValue: _city,
                  validator: (value) {
                    return null;
                  },
                  onSaved: (value) {
                    _city = value!;
                  },
                ),
              ),
              SizedBox(
                height: 20,
                width: 100,
                child: TextFormField(
                  initialValue: _country,
                  validator: (value) {
                    return null;
                  },
                  onSaved: (value) {
                    _country = value!;
                  },
                ),
              ),
            ],
          ),
          SizedBox(
            height: 20,
            width: 300,
            child: TextFormField(
              initialValue: _latlong,
              validator: (value) {
                return null;
              },
              onSaved: (value) {
                _latlong = value!;
              },
            ),
          ),
          TextButton(
            onPressed: () {
              if (_formKey.currentState!.validate()) {
                _formKey.currentState!.save();
              }
            },
            child: Text("Save"),
          ),
        ],
      ),
    );

    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!'),
              form,
              Expanded(child: weatherLayout),
            ],
          ),
        ),
      ),
    );
  }

  // Convert the Future value into a usable value.
  pullWeather({
    String? country,
    String? zip,
    String? city,
    String? lat,
    String? long,
  }) async {
    country ??= "US";

    if (lat != null && long != null) {
      weather = "Lat / Long Not Yet Implemented";
    } else if (zip != null) {
      weather = await hitOpenWeatherZip(zip, country);
    } else if (city != null) {
      weather = "City Weather Not Yet Implemented";
    } else {
      weather = "Please enter a location.";
    }

    if (weather.toString().contains("Sorry!")) {
      return weather;
    }

    if (weather != loadText) {
      if (debug) {
        debugPrint("DEBUG: Formatting text.");
      }
      var weatherObject = jsonDecode(weather);

      String weatherString = formatOpenWeatherData(weatherObject);

      weather = weatherString;
      if (debug) {
        debugPrint("DEBUG: Set to formatted weather string.");
      }
    } else {
      if (debug) {
        debugPrint("DEBUG: Skipping text formatting.");
      }
    }
  }

  // Call the API and put the desired information into the screen variable.
  _refreshWeather() {
    var lastReloadSeconds = DateTime.now().difference(lastLoadTime).inSeconds;
    if (debug) {
      debugPrint("DEBUG: Refresh was '$lastReloadSeconds' seconds ago.");
    }

    if (lastReloadSeconds < limitRefreshSeconds) {
      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;
    }

    if (debug) {
      debugPrint("DEBUG: Pulling weather...");
    }
    weather = loadText;
    pullWeather(country: "US", zip: "47630");
    lastLoadTime = DateTime.now();
    if (debug) {
      debugPrint("DEBUG: Weather pulled and date is set.");
    }
  }
}