/* 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 "Application.h"
#include "NewInstanceDialog.h"
#include "ui_NewInstanceDialog.h"

#include <BaseVersion.h>
#include <icons/IconList.h>
#include <tasks/Task.h>
#include <InstanceList.h>

#include "VersionSelectDialog.h"
#include "ProgressDialog.h"
#include "IconPickerDialog.h"

#include <QLayout>
#include <QPushButton>
#include <QFileDialog>
#include <QValidator>
#include <QDialogButtonBox>

#include "ui/widgets/PageContainer.h"
#include "ui/pages/modplatform/VanillaPage.h"
#include "ui/pages/modplatform/atlauncher/AtlPage.h"
#include "ui/pages/modplatform/ftb/FtbPage.h"
#include "ui/pages/modplatform/legacy_ftb/Page.h"
#include "ui/pages/modplatform/flame/FlamePage.h"
#include "ui/pages/modplatform/modrinth/ModrinthPage.h"
#include "ui/pages/modplatform/ImportPage.h"
#include "ui/pages/modplatform/technic/TechnicPage.h"

NewInstanceDialog::NewInstanceDialog(const QString& initialGroup,
									 const QString& url, QWidget* parent)
	: QDialog(parent), ui(new Ui::NewInstanceDialog)
{
	ui->setupUi(this);

	setWindowIcon(APPLICATION->getThemedIcon("new"));

	InstIconKey = "default";
	ui->iconButton->setIcon(APPLICATION->icons()->getIcon(InstIconKey));

	auto groupList = APPLICATION->instances()->getGroups();
	groupList.removeDuplicates();
	groupList.sort(Qt::CaseInsensitive);
	groupList.removeOne("");
	groupList.push_front(initialGroup);
	groupList.push_front("");
	ui->groupBox->addItems(groupList);
	int index = groupList.indexOf(initialGroup);
	if (index == -1) {
		index = 0;
	}
	ui->groupBox->setCurrentIndex(index);
	ui->groupBox->lineEdit()->setPlaceholderText(tr("No group"));

	// NOTE: m_buttons must be initialized before PageContainer, because it
	// indirectly accesses m_buttons through setSuggestedPack! Do not move
	// this below.
	m_buttons =
		new QDialogButtonBox(QDialogButtonBox::Help | QDialogButtonBox::Ok |
							 QDialogButtonBox::Cancel);

	m_container = new PageContainer(this);
	m_container->setSizePolicy(QSizePolicy::Policy::Preferred,
							   QSizePolicy::Policy::Expanding);
	m_container->layout()->setContentsMargins(0, 0, 0, 0);
	ui->verticalLayout->insertWidget(2, m_container);

	m_container->addButtons(m_buttons);

	// Bonk Qt over its stupid head and make sure it understands which button is
	// the default one... See:
	// https://stackoverflow.com/questions/24556831/qbuttonbox-set-default-button
	auto OkButton = m_buttons->button(QDialogButtonBox::Ok);
	OkButton->setDefault(true);
	OkButton->setAutoDefault(true);
	connect(OkButton, &QPushButton::clicked, this, &NewInstanceDialog::accept);

	auto CancelButton = m_buttons->button(QDialogButtonBox::Cancel);
	CancelButton->setDefault(false);
	CancelButton->setAutoDefault(false);
	connect(CancelButton, &QPushButton::clicked, this,
			&NewInstanceDialog::reject);

	auto HelpButton = m_buttons->button(QDialogButtonBox::Help);
	HelpButton->setDefault(false);
	HelpButton->setAutoDefault(false);
	connect(HelpButton, &QPushButton::clicked, m_container,
			&PageContainer::help);

	if (!url.isEmpty()) {
		QUrl actualUrl(url);
		m_container->selectPage("import");
		importPage->setUrl(url);
	}

	updateDialogState();

	restoreGeometry(QByteArray::fromBase64(
		APPLICATION->settings()->get("NewInstanceGeometry").toByteArray()));
}

void NewInstanceDialog::reject()
{
	APPLICATION->settings()->set("NewInstanceGeometry",
								 saveGeometry().toBase64());
	QDialog::reject();
}

void NewInstanceDialog::accept()
{
	APPLICATION->settings()->set("NewInstanceGeometry",
								 saveGeometry().toBase64());
	importIconNow();
	QDialog::accept();
}

QList<BasePage*> NewInstanceDialog::getPages()
{
	importPage = new ImportPage(this);
	flamePage = new FlamePage(this);
	auto technicPage = new TechnicPage(this);
	return {new VanillaPage(this),	   importPage,
			new AtlPage(this),		   flamePage,
			new ModrinthPage(this),	   new FtbPage(this),
			new LegacyFTB::Page(this), technicPage};
}

QString NewInstanceDialog::dialogTitle()
{
	return tr("New Instance");
}

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

void NewInstanceDialog::setSuggestedPack(const QString& name,
										 InstanceTask* task)
{
	creationTask.reset(task);
	ui->instNameTextBox->setPlaceholderText(name);

	if (!task) {
		ui->iconButton->setIcon(APPLICATION->icons()->getIcon("default"));
		importIcon = false;
	}

	auto allowOK = task && !instName().isEmpty();
	m_buttons->button(QDialogButtonBox::Ok)->setEnabled(allowOK);
}

void NewInstanceDialog::setSuggestedIconFromFile(const QString& path,
												 const QString& name)
{
	importIcon = true;
	importIconPath = path;
	importIconName = name;

	// Hmm, for some reason they can be to small
	ui->iconButton->setIcon(QIcon(path));
}

void NewInstanceDialog::setSuggestedIcon(const QString& key)
{
	auto icon = APPLICATION->icons()->getIcon(key);
	importIcon = false;

	ui->iconButton->setIcon(icon);
}

InstanceTask* NewInstanceDialog::extractTask()
{
	InstanceTask* extracted = creationTask.get();
	creationTask.release();
	extracted->setName(instName());
	extracted->setGroup(instGroup());
	extracted->setIcon(iconKey());
	return extracted;
}

void NewInstanceDialog::updateDialogState()
{
	auto allowOK = creationTask && !instName().isEmpty();
	auto OkButton = m_buttons->button(QDialogButtonBox::Ok);
	if (OkButton->isEnabled() != allowOK) {
		OkButton->setEnabled(allowOK);
	}
}

QString NewInstanceDialog::instName() const
{
	auto result = ui->instNameTextBox->text().trimmed();
	if (result.size()) {
		return result;
	}
	result = ui->instNameTextBox->placeholderText().trimmed();
	if (result.size()) {
		return result;
	}
	return QString();
}

QString NewInstanceDialog::instGroup() const
{
	return ui->groupBox->currentText();
}
QString NewInstanceDialog::iconKey() const
{
	return InstIconKey;
}

void NewInstanceDialog::on_iconButton_clicked()
{
	importIconNow(); // so the user can switch back
	IconPickerDialog dlg(this);
	dlg.execWithSelection(InstIconKey);

	if (dlg.result() == QDialog::Accepted) {
		InstIconKey = dlg.selectedIconKey;
		ui->iconButton->setIcon(APPLICATION->icons()->getIcon(InstIconKey));
		importIcon = false;
	}
}

void NewInstanceDialog::on_instNameTextBox_textChanged(const QString& arg1)
{
	updateDialogState();
}

void NewInstanceDialog::importIconNow()
{
	if (importIcon) {
		APPLICATION->icons()->installIcon(importIconPath, importIconName);
		InstIconKey = importIconName;
		importIcon = false;
	}
	APPLICATION->settings()->set("NewInstanceGeometry",
								 saveGeometry().toBase64());
}
