/* SPDX-FileCopyrightText: 2026 Project Tick
 * SPDX-FileContributor: Project Tick
 * SPDX-License-Identifier: GPL-3.0-or-later WITH LicenseRef-MeshMC-MMCO-Module-Exception-1.0
 *
 *   MeshMC - A Custom Launcher for Minecraft
 *   Copyright (C) 2026 Project Tick
 *
 *   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, either version 3 of the License, or
 *   (at your option) any later version, with the additional permission
 *   described in the MeshMC MMCO Module Exception 1.0.
 *
 *   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/>.
 *
 *   You should have received a copy of the MeshMC MMCO Module Exception 1.0
 *   along with this program.  If not, see <https://projecttick.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 "InstanceWindow.h"
#include "Application.h"

#include <QScrollBar>
#include <QMessageBox>
#include <QHBoxLayout>
#include <QPushButton>
#include <qlayoutitem.h>
#include <QCloseEvent>

#include "ui/dialogs/CustomMessageBox.h"
#include "ui/dialogs/ProgressDialog.h"
#include "ui/widgets/PageContainer.h"

#include "InstancePageProvider.h"

#include "icons/IconList.h"

InstanceWindow::InstanceWindow(InstancePtr instance, QWidget* parent)
	: QMainWindow(parent), m_instance(instance)
{
	setAttribute(Qt::WA_DeleteOnClose);

	auto icon = APPLICATION->icons()->getIcon(m_instance->iconKey());
	QString windowTitle = tr("Console window for ") + m_instance->name();

	// Set window properties
	{
		setWindowIcon(icon);
		setWindowTitle(windowTitle);
	}

	// Add page container
	{
		auto provider = std::make_shared<InstancePageProvider>(m_instance);
		m_container = new PageContainer(provider.get(), "console", this);
		m_container->setParentContainer(this);
		setCentralWidget(m_container);
		setContentsMargins(0, 0, 0, 0);
	}

	// Add custom buttons to the page container layout.
	{
		auto horizontalLayout = new QHBoxLayout();
		horizontalLayout->setObjectName(QStringLiteral("horizontalLayout"));
		horizontalLayout->setContentsMargins(6, -1, 6, -1);

		auto btnHelp = new QPushButton();
		btnHelp->setText(tr("Help"));
		horizontalLayout->addWidget(btnHelp);
		connect(btnHelp, &QPushButton::clicked, m_container,
				&PageContainer::help);

		auto spacer = new QSpacerItem(40, 20, QSizePolicy::Expanding,
									  QSizePolicy::Minimum);
		horizontalLayout->addSpacerItem(spacer);

		m_killButton = new QPushButton();
		horizontalLayout->addWidget(m_killButton);
		connect(m_killButton, &QPushButton::clicked, this,
				&InstanceWindow::on_btnKillMinecraft_clicked);

		m_launchOfflineButton = new QPushButton();
		horizontalLayout->addWidget(m_launchOfflineButton);
		m_launchOfflineButton->setText(tr("Launch Offline"));
		updateLaunchButtons();
		connect(m_launchOfflineButton, &QPushButton::clicked, this,
				&InstanceWindow::on_btnLaunchMinecraftOffline_clicked);

		m_closeButton = new QPushButton();
		m_closeButton->setText(tr("Close"));
		horizontalLayout->addWidget(m_closeButton);
		connect(m_closeButton, &QPushButton::clicked, this,
				&InstanceWindow::on_closeButton_clicked);

		m_container->addButtons(horizontalLayout);
	}

	// restore window state
	{
		auto base64State =
			APPLICATION->settings()->get("ConsoleWindowState").toByteArray();
		restoreState(QByteArray::fromBase64(base64State));
		auto base64Geometry =
			APPLICATION->settings()->get("ConsoleWindowGeometry").toByteArray();
		restoreGeometry(QByteArray::fromBase64(base64Geometry));
	}

	// set up instance and launch process recognition
	{
		auto launchTask = m_instance->getLaunchTask();
		on_InstanceLaunchTask_changed(launchTask);
		connect(m_instance.get(), &BaseInstance::launchTaskChanged, this,
				&InstanceWindow::on_InstanceLaunchTask_changed);
		connect(m_instance.get(), &BaseInstance::runningStatusChanged, this,
				&InstanceWindow::on_RunningState_changed);
	}

	// set up instance destruction detection
	{
		connect(m_instance.get(), &BaseInstance::statusChanged, this,
				&InstanceWindow::on_instanceStatusChanged);
	}
	show();
}

void InstanceWindow::on_instanceStatusChanged(BaseInstance::Status,
											  BaseInstance::Status newStatus)
{
	if (newStatus == BaseInstance::Status::Gone) {
		m_doNotSave = true;
		close();
	}
}

void InstanceWindow::updateLaunchButtons()
{
	if (m_instance->isRunning()) {
		m_launchOfflineButton->setEnabled(false);
		m_killButton->setText(tr("Kill"));
		m_killButton->setObjectName("killButton");
		m_killButton->setToolTip(tr("Kill the running instance"));
	} else if (!m_instance->canLaunch()) {
		m_launchOfflineButton->setEnabled(false);
		m_killButton->setText(tr("Launch"));
		m_killButton->setObjectName("launchButton");
		m_killButton->setToolTip(tr("Launch the instance"));
		m_killButton->setEnabled(false);
	} else {
		m_launchOfflineButton->setEnabled(true);
		m_killButton->setText(tr("Launch"));
		m_killButton->setObjectName("launchButton");
		m_killButton->setToolTip(tr("Launch the instance"));
	}
	// NOTE: this is a hack to force the button to recalculate its style
	m_killButton->setStyleSheet("/* */");
	m_killButton->setStyleSheet(QString());
}

void InstanceWindow::on_btnLaunchMinecraftOffline_clicked()
{
	APPLICATION->launch(m_instance, false, nullptr);
}

void InstanceWindow::on_InstanceLaunchTask_changed(
	shared_qobject_ptr<LaunchTask> proc)
{
	m_proc = proc;
}

void InstanceWindow::on_RunningState_changed(bool running)
{
	updateLaunchButtons();
	m_container->refreshContainer();
	if (running) {
		selectPage("log");
	}
}

void InstanceWindow::on_closeButton_clicked()
{
	close();
}

void InstanceWindow::closeEvent(QCloseEvent* event)
{
	bool proceed = true;
	if (!m_doNotSave) {
		proceed &= m_container->prepareToClose();
	}

	if (!proceed) {
		return;
	}

	APPLICATION->settings()->set("ConsoleWindowState", saveState().toBase64());
	APPLICATION->settings()->set("ConsoleWindowGeometry",
								 saveGeometry().toBase64());
	emit isClosing();
	event->accept();
}

bool InstanceWindow::saveAll()
{
	return m_container->saveAll();
}

void InstanceWindow::on_btnKillMinecraft_clicked()
{
	if (m_instance->isRunning()) {
		APPLICATION->kill(m_instance);
	} else {
		APPLICATION->launch(m_instance, true, nullptr);
	}
}

QString InstanceWindow::instanceId()
{
	return m_instance->id();
}

bool InstanceWindow::selectPage(QString pageId)
{
	return m_container->selectPage(pageId);
}

void InstanceWindow::refreshContainer()
{
	m_container->refreshContainer();
}

InstanceWindow::~InstanceWindow() {}

bool InstanceWindow::requestClose()
{
	if (m_container->prepareToClose()) {
		close();
		return true;
	}
	return false;
}
