student-legacy/refilc_mobile_ui/lib/screens/login/kreten_login.dart

// ignore_for_file: use_build_context_synchronously

import 'package:flutter/foundation.dart';
import 'package:flutter/material.dart';
import 'package:provider/provider.dart';
import 'package:refilc_kreta_api/client/api.dart';
import 'package:refilc_kreta_api/client/client.dart';
import 'package:webview_flutter/webview_flutter.dart';

class KretenLoginScreen extends StatefulWidget {
  const KretenLoginScreen({super.key});

  @override
  State<KretenLoginScreen> createState() => _KretenLoginScreenState();
}

class _KretenLoginScreenState extends State<KretenLoginScreen> {
  late final WebViewController controller;
  var loadingPercentage = 0;
  var currentUrl = '';

  @override
  void initState() {
    super.initState();
    controller = WebViewController()
      ..setJavaScriptMode(JavaScriptMode.unrestricted)
      ..setNavigationDelegate(NavigationDelegate(
        onPageStarted: (url) async {
          setState(() {
            loadingPercentage = 0;
            currentUrl = url;
          });

          List<String> requiredThings = url
              .replaceAll(
                  'https://mobil.e-kreta.hu/ellenorzo-student/prod/oauthredirect?code=',
                  '')
              .replaceAll(
                  '&scope=openid%20email%20offline_access%20kreta-ellenorzo-webapi.public%20kreta-eugyintezes-webapi.public%20kreta-fileservice-webapi.public%20kreta-mobile-global-webapi.public%20kreta-dkt-webapi.public%20kreta-ier-webapi.public&state=refilc_student_mobile&session_state=',
                  ':')
              .split(':');

          String code = requiredThings[0];
          // String sessionState = requiredThings[1];

          debugPrint('url: $url');

          print(code);

          // actual login (token grant) logic
          Map<String, String> headers = {
            "content-type": "application/x-www-form-urlencoded; charset=UTF-8",
            "accept": "*/*",
            "user-agent":
                "eKretaStudent/264745 CFNetwork/1494.0.7 Darwin/23.4.0",
          };

          Map? res = await Provider.of<KretaClient>(context, listen: false)
              .postAPI(KretaAPI.login,
                  autoHeader: false,
                  headers: headers,
                  body: {
                "code": code,
                "code_verifier": "DSpuqj_HhDX4wzQIbtn8lr8NLE5wEi1iVLMtMK0jY6c",
                "redirect_uri":
                    "https://mobil.e-kreta.hu/ellenorzo-student/prod/oauthredirect",
                "client_id": "kreta-ellenorzo-student-mobile-ios",
                "grant_type": "authorization_code",
              });
          if (res != null) {
            if (kDebugMode) {
              print(res);
            }

            if (res.containsKey("error")) {
              if (res["error"] == "invalid_grant") {
                print("ERROR: invalid_grant");
                return;
              }
            } else {
              print("MUKODIK GECI");
              print("ACCESS TOKEN: ${res["access_token"]}");
              // if (res.containsKey("access_token")) {
              //   try {
              //     Provider.of<KretaClient>(context, listen: false).accessToken =
              //         res["access_token"];
              //     Map? studentJson =
              //         await Provider.of<KretaClient>(context, listen: false)
              //             .getAPI(KretaAPI.student(instituteCode));
              //     Student student = Student.fromJson(studentJson!);
              //     var user = User(
              //       username: username,
              //       password: password,
              //       instituteCode: instituteCode,
              //       name: student.name,
              //       student: student,
              //       role: JwtUtils.getRoleFromJWT(res["access_token"])!,
              //     );

              //     if (onLogin != null) onLogin(user);

              //     // Store User in the database
              //     await Provider.of<DatabaseProvider>(context, listen: false)
              //         .store
              //         .storeUser(user);
              //     Provider.of<UserProvider>(context, listen: false)
              //         .addUser(user);
              //     Provider.of<UserProvider>(context, listen: false)
              //         .setUser(user.id);

              //     // Get user data
              //     try {
              //       await Future.wait([
              //         Provider.of<GradeProvider>(context, listen: false)
              //             .fetch(),
              //         Provider.of<TimetableProvider>(context, listen: false)
              //             .fetch(week: Week.current()),
              //         Provider.of<ExamProvider>(context, listen: false).fetch(),
              //         Provider.of<HomeworkProvider>(context, listen: false)
              //             .fetch(),
              //         Provider.of<MessageProvider>(context, listen: false)
              //             .fetchAll(),
              //         Provider.of<MessageProvider>(context, listen: false)
              //             .fetchAllRecipients(),
              //         Provider.of<NoteProvider>(context, listen: false).fetch(),
              //         Provider.of<EventProvider>(context, listen: false)
              //             .fetch(),
              //         Provider.of<AbsenceProvider>(context, listen: false)
              //             .fetch(),
              //       ]);
              //     } catch (error) {
              //       print("WARNING: failed to fetch user data: $error");
              //     }

              //     if (onSuccess != null) onSuccess();

              //     return LoginState.success;
              //   } catch (error) {
              //     print("ERROR: loginAPI: $error");
              //     // maybe check debug mode
              //     // ScaffoldMessenger.of(context).showSnackBar(SnackBar(content: Text("ERROR: $error")));
              //     return LoginState.failed;
              //   }
              // }
            }
          }
        },
        onProgress: (progress) {
          setState(() {
            loadingPercentage = progress;
          });
        },
        onPageFinished: (url) {
          setState(() {
            loadingPercentage = 100;
          });
        },
      ))
      ..loadRequest(
        Uri.parse(
            'https://idp.e-kreta.hu/connect/authorize?prompt=login&nonce=wylCrqT4oN6PPgQn2yQB0euKei9nJeZ6_ffJ-VpSKZU&response_type=code&code_challenge_method=S256&scope=openid%20email%20offline_access%20kreta-ellenorzo-webapi.public%20kreta-eugyintezes-webapi.public%20kreta-fileservice-webapi.public%20kreta-mobile-global-webapi.public%20kreta-dkt-webapi.public%20kreta-ier-webapi.public&code_challenge=HByZRRnPGb-Ko_wTI7ibIba1HQ6lor0ws4bcgReuYSQ&redirect_uri=https://mobil.e-kreta.hu/ellenorzo-student/prod/oauthredirect&client_id=kreta-ellenorzo-student-mobile-ios&state=refilc_student_mobile'),
      );
  }

  // Future<void> loadLoginUrl() async {
  //   String nonceStr = await Provider.of<KretaClient>(context, listen: false)
  //         .getAPI(KretaAPI.nonce, json: false);

  //     Nonce nonce = getNonce(nonceStr, );
  // }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        leading: const BackButton(),
        title: const Text('e-KRÉTA Bejelentkezés'),
      ),
      body: Stack(
        children: [
          WebViewWidget(
            controller: controller,
          ),
          if (loadingPercentage < 100)
            LinearProgressIndicator(
              value: loadingPercentage / 100.0,
            ),
        ],
      ),
    );
  }
}