import 'package:flutter/material.dart';
import 'dart:io';
import 'package:http/http.dart' as http;

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

class MyApp extends StatelessWidget {
  const MyApp({super.key});

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        brightness: Brightness.dark,
        primaryColor: Colors.white,
      ),
      home: const MyHomePage(title: 'Flutter Demo Home Page'),
    );
  }
}

class MyHomePage extends StatefulWidget {
  const MyHomePage({super.key, required this.title});

  final String title;

  @override
  State<MyHomePage> createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  final TextEditingController _todoController = TextEditingController();
  final TextEditingController _usernameController = TextEditingController();
  final List<String> _values = <String>['first todo', 'second work'];
  final List<bool> _dones = <bool>[true, false];
  var _username = "test";

  @override
  Widget build(BuildContext context) {
    return Scaffold(
        appBar: AppBar(
          title: Text("Text App"),
          backgroundColor: Color(0xff2d3f76),
        ),
        body: Center(
            child: Container(
                padding: EdgeInsets.all(16.0),
                child: Column(children: _showTodos()))),
        floatingActionButton: FloatingActionButton(
          onPressed: () {
            setState(() {
              if (_todoController.text.isNotEmpty) {
                _values.add(_todoController.text);
                _dones.add(false);
                _todoController.clear();
              }
            });
          },
          tooltip: 'Add Todo',
          child: const Icon(Icons.add),
        ),
        bottomNavigationBar: BottomNavigationBar(
          items: [
            BottomNavigationBarItem(
                icon: IconButton(
                    onPressed: () => _showDialog(), icon: Icon(Icons.login)),
                label: "Login"),
            BottomNavigationBarItem(
                icon: IconButton(
                    onPressed: () => _saveTodos(), icon: Icon(Icons.save)),
                label: "Save"),
          ],
          backgroundColor: Color(0xff222436),
        ));
  }

  List<Widget> _showTodos() {
    List<Widget> todos = [];
    for (int i = 0; i < _values.length; i++) {
      String context = _values[i];
      todos.add(Row(children: <Widget>[
        Checkbox(
            value: _dones[i],
            onChanged: (bool? value) {
              setState(() {
                _dones[i] = value!;
              });
            }),
        SizedBox(width: 10),
        Text(context),
        Spacer(),
        IconButton(
          onPressed: () {
            setState(() {
              int i = _values.indexOf(context);
              _values.remove(context);
              _dones.removeAt(i);
            });
          },
          icon: Icon(
            Icons.delete,
            color: Colors.red,
          ),
        ),
      ]));
    }
    if (_values.isEmpty) {
      todos.add(Text('Nothing here'));
    }
    todos.add(SizedBox(height: 10));
    todos.add(TextField(
      controller: _todoController,
      decoration: const InputDecoration(
        border: OutlineInputBorder(),
        labelText: 'Insert Todo',
      ),
    ));
    return todos;
  }

  Future<void> _showDialog() async {
    return showDialog<void>(
        context: context,
        builder: (BuildContext context) {
          return AlertDialog(
            title: const Text('Login'),
            content: TextField(
              controller: _usernameController,
              decoration: const InputDecoration(hintText: 'Username'),
              autofocus: true,
            ),
            actions: <Widget>[
              OutlinedButton(
                style: OutlinedButton.styleFrom(
                  shape: RoundedRectangleBorder(
                    borderRadius: BorderRadius.circular(12),
                  ),
                ),
                onPressed: () {
                  Navigator.of(context).pop();
                },
                child: const Text('Cancel'),
              ),
              ElevatedButton(
                style: ElevatedButton.styleFrom(
                  shape: RoundedRectangleBorder(
                    borderRadius: BorderRadius.circular(12),
                  ),
                ),
                onPressed: () {
                  Navigator.of(context).pop();
                  _username = _usernameController.text;
                  _values.clear();
                  _dones.clear();
                  _loadTodos();
                  _usernameController.clear();
                },
                child: const Text('Login'),
              ),
            ],
          );
        });
  }

  void _loadTodos() async {
    String uri = "http://127.0.0.1:6969/$_username.txt";
    try {
      http.Response response = await http.get(Uri.parse(uri));
      if (response.statusCode == 200) {
        print("Successfully got the data");
      } else {
        print('Error getting data: ${response.statusCode}');
        return;
      }

      setState(() {
        todoDecode(response.body, _values, _dones);
      });
      print(_values);
      print(_dones);
    } on SocketException catch (e) {
      print(e.message);
    }
  }

  void _saveTodos() async {
    String uri = "http://127.0.0.1:6969/$_username.txt";
    var data = todoEncode(_values, _dones);
    print(data);
    try {
      http.Response response = await http.post(Uri.parse(uri), body: data);
      if (response.statusCode == 200) {
        print('Data sent successfully');
      } else {
        print('Error sending data: ${response.statusCode}');
      }
    } catch (e) {
      print(e.toString());
    }
  }
}

String todoEncode(List<String> values, List<bool> dones) {
  String data = "";
  for (int i = 0; i < values.length; i++) {
    data += '${dones[i] ? 1 : 0}:${values[i]}\n';
  }
  return data;
}

void todoDecode(String todos, List<String> values, List<bool> dones) {
  var tmp = todos.split('\n');
  for (int i = 0; i < tmp.length - 1; i++) {
    values.add(tmp[i].substring(2));
    dones.add(tmp[i][0] == '0' ? false : true);
  }
}