// SPDX-FileCopyrightText: 2017 Konstantinos Sideris <siderisk@auth.gr>
// SPDX-FileCopyrightText: 2021 Nheko Contributors
//
// SPDX-License-Identifier: GPL-3.0-or-later

#pragma once

#include <QWidget>

#include <memory>

#include <mtx/user_interactive.hpp>
#include <mtxclient/http/client.hpp>

class FlatButton;
class RaisedButton;
class TextField;
class QLabel;
class QVBoxLayout;
class QHBoxLayout;

class RegisterPage : public QWidget
{
        Q_OBJECT

public:
        RegisterPage(QWidget *parent = nullptr);

protected:
        void paintEvent(QPaintEvent *event) override;

signals:
        void backButtonClicked();
        void errorOccurred();

        //! Used to trigger the corresponding slot outside of the main thread.
        void serverError(const QString &err);

        void wellKnownLookup();
        void versionsCheck();
        void registration();
        void UIA(const mtx::user_interactive::Unauthorized &unauthorized);
        void registrationWithAuth(const mtx::user_interactive::Auth &auth);

        void registering();
        void registerOk();

private slots:
        void onBackButtonClicked();
        void onRegisterButtonClicked();

        // function for showing different errors
        void showError(const QString &msg);
        void showError(QLabel *label, const QString &msg);

        bool checkOneField(QLabel *label, const TextField *t_field, const QString &msg);
        bool checkUsername();
        bool checkPassword();
        bool checkPasswordConfirmation();
        bool checkServer();

        void doWellKnownLookup();
        void doVersionsCheck();
        void doRegistration();
        void doUIA(const mtx::user_interactive::Unauthorized &unauthorized);
        void doRegistrationWithAuth(const mtx::user_interactive::Auth &auth);
        mtx::http::Callback<mtx::responses::Register> registrationCb();

private:
        QVBoxLayout *top_layout_;

        QHBoxLayout *back_layout_;
        QHBoxLayout *logo_layout_;
        QHBoxLayout *button_layout_;

        QLabel *logo_;
        QLabel *error_label_;
        QLabel *error_username_label_;
        QLabel *error_password_label_;
        QLabel *error_password_confirmation_label_;
        QLabel *error_server_label_;
        QLabel *error_registration_token_label_;

        FlatButton *back_button_;
        RaisedButton *register_button_;

        QWidget *form_widget_;
        QHBoxLayout *form_wrapper_;
        QVBoxLayout *form_layout_;

        TextField *username_input_;
        TextField *password_input_;
        TextField *password_confirmation_;
        TextField *server_input_;
        TextField *registration_token_input_;
};
