tuuli_app/lib/pages/login_page.dart

import 'dart:async';

import 'package:dio/dio.dart';
import 'package:flutter/material.dart';
import 'package:get/get.dart';
import 'package:tuuli_api/tuuli_api.dart';
import 'package:tuuli_app/api_controller.dart';

class LoginPageController extends GetxController {
  final _endpoint = ApiController.to.endPoint.obs;
  String get endpoint => _endpoint.value;
  set endpoint(String value) => _endpoint.value = value;

  final _username = "".obs;
  String get username => _username.value;
  set username(String value) => _username.value = value;

  final _password = "".obs;
  String get password => _password.value;
  set password(String value) => _password.value = value;

  final _submitted = false.obs;
  bool get submitted => _submitted.value;
  set submitted(bool value) => _submitted.value = value;

  bool get isFormValid =>
      endpoint.isNotEmpty && username.isNotEmpty && password.isNotEmpty;

  Future<void> submitForm() async {
    submitted = true;
    if (isFormValid) {
      try {
        ApiController.to.endPoint = endpoint;
        final resp = await ApiController.to.apiClient.getAccessToken(
          authModel: AuthModel(
            username: username,
            password: password,
          ),
        );

        final respData = resp.data;
        if (resp.statusCode == 200 && respData != null) {
          final accessToken = respData.accessToken;
          Get.find<ApiController>().token = accessToken;
          WidgetsBinding.instance.addPostFrameCallback((_) {
            Get.offAllNamed("/home");
          });
        } else {
          Get.snackbar(
            "Ошибка входа",
            resp.statusMessage ?? "Неизвестная ошибка",
          );
        }
      } on DioError catch (e) {
        final errorData = e.response?.data;
        if (errorData != null) {
          final error = errorData["error"];
          if (error != null) {
            Get.snackbar(
              "Ошибка входа",
              "$error",
            );
          }
        } else {
          Get.snackbar(
            "Ошибка входа",
            "$e",
          );
        }
      } catch (e) {
        Get.snackbar(
          "Ошибка входа",
          "$e",
        );
      }
    }
    submitted = false;
  }
}

class LoginPage extends GetView<LoginPageController> {
  const LoginPage({super.key});

  @override
  Widget build(BuildContext context) {
    final screenSize = Get.mediaQuery.size;
    final formWidth = screenSize.width <= 600 ? screenSize.width : 300.0;
    return Scaffold(
      body: Stack(
        children: [
          const SizedBox.square(
            dimension: 0,
          ),
          Row(
            mainAxisAlignment: MainAxisAlignment.start,
            crossAxisAlignment: CrossAxisAlignment.stretch,
            children: [
              LimitedBox(
                maxWidth: formWidth,
                child: Obx(
                  () => Container(
                    color: Colors.black.withAlpha(100),
                    padding: const EdgeInsets.all(16),
                    child: Column(
                      mainAxisAlignment: MainAxisAlignment.center,
                      mainAxisSize: MainAxisSize.min,
                      crossAxisAlignment: CrossAxisAlignment.stretch,
                      children: [
                        TextFormField(
                          enabled: !controller.submitted,
                          decoration: const InputDecoration(
                            labelText: 'Адрес бэкенда',
                            hintText: 'Введите адрес бэкенда Tuuli',
                          ),
                          initialValue: ApiController.to.endPoint,
                          onChanged: (value) => controller.endpoint = value,
                          validator: (value) {
                            if (value == null || value.isEmpty) {
                              return 'Пожалуйста, введите адрес бэкенда Tuuli';
                            }
                            return null;
                          },
                        ),
                        TextFormField(
                          enabled: !controller.submitted,
                          decoration: const InputDecoration(
                            labelText: 'Логин',
                            hintText: 'Введите логин',
                          ),
                          onChanged: (value) => controller.username = value,
                          validator: (value) {
                            if (value == null || value.isEmpty) {
                              return 'Пожалуйста, введите логин';
                            }
                            return null;
                          },
                        ),
                        TextFormField(
                          obscureText: true,
                          enabled: !controller.submitted,
                          decoration: const InputDecoration(
                            labelText: 'Пароль',
                            hintText: 'Введите пароль',
                          ),
                          onChanged: (value) => controller.password = value,
                          validator: (value) {
                            if (value == null || value.isEmpty) {
                              return 'Пожалуйста, введите пароль';
                            }
                            return null;
                          },
                        ),
                        const SizedBox(height: 16),
                        ElevatedButton(
                          onPressed:
                              !controller.isFormValid || controller.submitted
                                  ? null
                                  : () => controller.submitForm(),
                          child: const Text('Войти'),
                        ),
                      ],
                    ),
                  ),
                ),
              ),
            ],
          ),
        ],
      ),
    );
  }
}