import 'package:flutter/material.dart';
import 'package:go_router/go_router.dart';
import 'package:seshat/routing/routes.dart';
import 'package:seshat/ui/auth/viewmodel/login_view_model.dart';

class LoginPage extends StatefulWidget {
  const LoginPage({super.key, required this.viewModel});

  final LoginViewModel viewModel;

  @override
  State<LoginPage> createState() => _LoginPageState();
}

class _LoginPageState extends State<LoginPage> {
  final TextEditingController _username = TextEditingController(
    text: "ueauvergne",
  );
  final TextEditingController _password = TextEditingController(
    text: "ueauvergne",
  );

  @override
  void initState() {
    super.initState();
    widget.viewModel.login.addListener(_onResult);
  }

  @override
  void didUpdateWidget(covariant LoginPage oldWidget) {
    super.didUpdateWidget(oldWidget);
    oldWidget.viewModel.removeListener(_onResult);
    widget.viewModel.login.addListener(_onResult);
  }

  @override
  void dispose() {
    widget.viewModel.login.removeListener(_onResult);
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: Column(
        crossAxisAlignment: CrossAxisAlignment.center,
        mainAxisAlignment: MainAxisAlignment.spaceEvenly,
        children: [
          TextField(controller: _username),
          TextField(controller: _password),
          ListenableBuilder(
            listenable: widget.viewModel.login,
            builder: (context, child) {
              return FilledButton(
                onPressed: () {
                  widget.viewModel.login.execute((
                    _username.value.text,
                    _password.value.text,
                  ));
                },
                child: Text("Connexion"),
              );
            },
          ),
        ],
      ),
    );
  }

  void _onResult() {
    if (widget.viewModel.login.completed) {
      widget.viewModel.login.clearResult();
      context.go(Routes.add);
    }

    if (widget.viewModel.login.error) {
      widget.viewModel.login.clearResult();
      ScaffoldMessenger.of(context).showSnackBar(
        SnackBar(
          content: Text("Une erreur est survenue lors de la connexion."),
          action: SnackBarAction(
            label: "Réessayer",
            onPressed: () => widget.viewModel.login.execute((
              _username.value.text,
              _password.value.text,
            )),
          ),
        ),
      );
    }
  }
}