import 'dart:convert';

import 'package:flutter/material.dart';
import 'package:flutter_pwa_test/Content.dart';

class Login extends StatelessWidget {
  static const String _password = "SGVsbG9Xb3JsZCE=";

  Login({Key? key, required this.loginCallback}) : super(key: key);
  
  final VoidCallback loginCallback;

  final GlobalKey<FormState> _formKey = GlobalKey<FormState>();

  @override
  Widget build(BuildContext context) {
    return Center(
      child: Form(
        key: _formKey,
        autovalidateMode: AutovalidateMode.disabled,
        child: Column(
          children: [
            Container(
              constraints: const BoxConstraints(maxWidth: 500),
              child: TextFormField(
                decoration: const InputDecoration(
                  labelText: "Password",
                  hintText: "Password",
                  alignLabelWithHint: true,
                  border: OutlineInputBorder(),
                ),
                validator: (s) {
                  if (s == null) {
                    return "Please provide a value";
                  }

                  var encoded = base64Encode(utf8.encode(s));
                  print(encoded);
                  if (encoded != _password) {
                    return "Password is wrong";
                  }

                  return null;
                },
              ),
            ),
            const SizedBox(height: 16.0),
            ElevatedButton(
              onPressed: () async {
                var result = _formKey.currentState?.validate();
                if (result == null || !result) {
                  print(
                      "Could not validate password because of an internal error");
                  return;
                }

                loginCallback();
              },
              child: const Text("Ok"),
            )
          ],
        ),
      ),
    );
  }
}