// SPDX-License-Identifier: GPL-3.0-only
/*
 *  Prism Launcher - Minecraft Launcher
 *  Copyright (C) 2022 Sefa Eyeoglu <contact@scrumplex.net>
 *
 *  This program is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation, version 3.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program.  If not, see <https://www.gnu.org/licenses/>.
 *
 * This file incorporates work covered by the following copyright and
 * permission notice:
 *
 *      Copyright 2013-2021 MultiMC Contributors
 *
 *      Licensed under the Apache License, Version 2.0 (the "License");
 *      you may not use this file except in compliance with the License.
 *      You may obtain a copy of the License at
 *
 *          http://www.apache.org/licenses/LICENSE-2.0
 *
 *      Unless required by applicable law or agreed to in writing, software
 *      distributed under the License is distributed on an "AS IS" BASIS,
 *      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *      See the License for the specific language governing permissions and
 *      limitations under the License.
 */

#include "MSALoginDialog.h"
#include "Application.h"

#include "BuildConfig.h"
#include "ui_MSALoginDialog.h"

#include "DesktopServices.h"
#include "minecraft/auth/AuthFlow.h"

#include <QApplication>
#include <QClipboard>
#include <QPixmap>
#include <QUrl>
#include <QtWidgets/QPushButton>

MSALoginDialog::MSALoginDialog(QWidget* parent) : QDialog(parent), ui(new Ui::MSALoginDialog)
{
    ui->setupUi(this);

    // make font monospace
    QFont font;
    font.setPixelSize(ui->code->fontInfo().pixelSize());
    font.setFamily(APPLICATION->settings()->get("ConsoleFont").toString());
    font.setStyleHint(QFont::Monospace);
    font.setFixedPitch(true);
    ui->code->setFont(font);

    connect(ui->copyCode, &QPushButton::clicked, this, [this] { QApplication::clipboard()->setText(ui->code->text()); });
    ui->qr->setPixmap(QIcon((":/documents/login-qr.svg")).pixmap(QSize(150, 150)));
    ui->title->setText(tr("Login to %1").arg(BuildConfig.LAUNCHER_DISPLAYNAME));
    connect(ui->loginButton, &QPushButton::clicked, this, [this] {
        if (m_url.isValid())
            DesktopServices::openUrl(m_url);
    });
}

int MSALoginDialog::exec()
{
    // Setup the login task and start it
    m_account = MinecraftAccount::createBlankMSA();
    m_authflow_task = m_account->login(false);
    connect(m_authflow_task.get(), &Task::failed, this, &MSALoginDialog::onTaskFailed);
    connect(m_authflow_task.get(), &Task::succeeded, this, &QDialog::accept);
    connect(m_authflow_task.get(), &Task::aborted, this, &MSALoginDialog::reject);
    connect(m_authflow_task.get(), &Task::status, this, &MSALoginDialog::onTaskStatus);
    connect(m_authflow_task.get(), &AuthFlow::authorizeWithBrowser, this, &MSALoginDialog::authorizeWithBrowser);
    connect(m_authflow_task.get(), &AuthFlow::authorizeWithBrowserWithExtra, this, &MSALoginDialog::authorizeWithBrowserWithExtra);
    connect(ui->buttonBox->button(QDialogButtonBox::Cancel), &QPushButton::clicked, m_authflow_task.get(), &Task::abort);

    m_devicecode_task.reset(new AuthFlow(m_account->accountData(), AuthFlow::Action::DeviceCode, this));
    connect(m_devicecode_task.get(), &Task::failed, this, &MSALoginDialog::onTaskFailed);
    connect(m_devicecode_task.get(), &Task::succeeded, this, &QDialog::accept);
    connect(m_devicecode_task.get(), &Task::aborted, this, &MSALoginDialog::reject);
    connect(m_devicecode_task.get(), &Task::status, this, &MSALoginDialog::onTaskStatus);
    connect(m_devicecode_task.get(), &AuthFlow::authorizeWithBrowser, this, &MSALoginDialog::authorizeWithBrowser);
    connect(m_devicecode_task.get(), &AuthFlow::authorizeWithBrowserWithExtra, this, &MSALoginDialog::authorizeWithBrowserWithExtra);
    connect(ui->buttonBox->button(QDialogButtonBox::Cancel), &QPushButton::clicked, m_devicecode_task.get(), &Task::abort);
    QMetaObject::invokeMethod(m_authflow_task.get(), &Task::start, Qt::QueuedConnection);
    QMetaObject::invokeMethod(m_devicecode_task.get(), &Task::start, Qt::QueuedConnection);

    return QDialog::exec();
}

MSALoginDialog::~MSALoginDialog()
{
    delete ui;
}

void MSALoginDialog::onTaskFailed(QString reason)
{
    // Set message
    ui->stackedWidget->setCurrentIndex(0);
    auto lines = reason.split('\n');
    QString processed;
    for (auto line : lines) {
        if (line.size()) {
            processed += "<font color='red'>" + line + "</font><br />";
        } else {
            processed += "<br />";
        }
    }
    auto task = qobject_cast<Task*>(sender());
    ui->status->setText(processed);
    if (task) {
        ui->loadingLabel->setText(task->getStatus());
    }
    disconnect(ui->buttonBox->button(QDialogButtonBox::Cancel), &QPushButton::clicked, m_authflow_task.get(), &Task::abort);
    disconnect(ui->buttonBox->button(QDialogButtonBox::Cancel), &QPushButton::clicked, m_devicecode_task.get(), &Task::abort);
    connect(ui->buttonBox->button(QDialogButtonBox::Cancel), &QPushButton::clicked, this, &MSALoginDialog::reject);
}

void MSALoginDialog::authorizeWithBrowser(const QUrl& url)
{
    ui->stackedWidget->setCurrentIndex(1);
    m_url = url;
}

void MSALoginDialog::authorizeWithBrowserWithExtra(QString url, QString code, int expiresIn)
{
    ui->stackedWidget->setCurrentIndex(1);

    const auto linkString = QString("<a href=\"%1\">%2</a>").arg(url, url);
    ui->code->setText(code);
    auto isDefaultUrl = url == "https://www.microsoft.com/link";
    ui->qr->setVisible(isDefaultUrl);
    if (isDefaultUrl) {
        ui->qrMessage->setText(tr("Open %1 or scan the QR and enter the above code.").arg(linkString));
    } else {
        ui->qrMessage->setText(tr("Open %1 and enter the above code.").arg(linkString));
    }
}

void MSALoginDialog::onTaskStatus(QString status)
{
    ui->stackedWidget->setCurrentIndex(0);
    ui->status->setText(status);
}

// Public interface
MinecraftAccountPtr MSALoginDialog::newAccount(QWidget* parent)
{
    MSALoginDialog dlg(parent);
    if (dlg.exec() == QDialog::Accepted) {
        return dlg.m_account;
    }
    return nullptr;
}