/* SPDX-FileCopyrightText: 2026 Project Tick
 * SPDX-FileContributor: Project Tick
 * SPDX-License-Identifier: GPL-3.0-or-later
 *
 *   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.
 *
 *   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 2020-2021 Jamie Mansfield <jmansfield@cadixdev.org>
 * Copyright 2021 Philip T <me@phit.link>
 *
 * 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 "FtbPage.h"
#include "ui_FtbPage.h"

#include <QKeyEvent>

#include "ui/dialogs/NewInstanceDialog.h"
#include "modplatform/modpacksch/FTBPackInstallTask.h"

#include "HoeDown.h"

FtbPage::FtbPage(NewInstanceDialog* dialog, QWidget* parent)
	: QWidget(parent), ui(new Ui::FtbPage), dialog(dialog)
{
	ui->setupUi(this);

	filterModel = new Ftb::FilterModel(this);
	listModel = new Ftb::ListModel(this);
	filterModel->setSourceModel(listModel);
	ui->packView->setModel(filterModel);
	ui->packView->setSortingEnabled(true);
	ui->packView->header()->hide();
	ui->packView->setIndentation(0);

	ui->searchEdit->installEventFilter(this);

	ui->versionSelectionBox->view()->setVerticalScrollBarPolicy(
		Qt::ScrollBarAsNeeded);
	ui->versionSelectionBox->view()->parentWidget()->setMaximumHeight(300);

	for (int i = 0; i < filterModel->getAvailableSortings().size(); i++) {
		ui->sortByBox->addItem(
			filterModel->getAvailableSortings().keys().at(i));
	}
	ui->sortByBox->setCurrentText(filterModel->translateCurrentSorting());

	connect(ui->searchEdit, &QLineEdit::textChanged, this,
			&FtbPage::triggerSearch);
	connect(ui->sortByBox, &QComboBox::currentTextChanged, this,
			&FtbPage::onSortingSelectionChanged);
	connect(ui->packView->selectionModel(),
			&QItemSelectionModel::currentChanged, this,
			&FtbPage::onSelectionChanged);
	connect(ui->versionSelectionBox, &QComboBox::currentTextChanged, this,
			&FtbPage::onVersionSelectionChanged);
}

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

bool FtbPage::eventFilter(QObject* watched, QEvent* event)
{
	if (watched == ui->searchEdit && event->type() == QEvent::KeyPress) {
		QKeyEvent* keyEvent = static_cast<QKeyEvent*>(event);
		if (keyEvent->key() == Qt::Key_Return) {
			triggerSearch();
			keyEvent->accept();
			return true;
		}
	}
	return QWidget::eventFilter(watched, event);
}

bool FtbPage::shouldDisplay() const
{
	return true;
}

void FtbPage::openedImpl()
{
	if (!initialised) {
		listModel->request();
		initialised = true;
	}

	suggestCurrent();
}

void FtbPage::suggestCurrent()
{
	if (!isOpened) {
		return;
	}

	if (selectedVersion.isEmpty()) {
		dialog->setSuggestedPack();
		return;
	}

	dialog->setSuggestedPack(
		selected.name + " " + selectedVersion,
		new ModpacksCH::PackInstallTask(selected, selectedVersion));
	for (auto art : selected.art) {
		if (art.type == "square") {
			QString editedLogoName;
			editedLogoName = selected.name;

			listModel->getLogo(selected.name, art.url,
							   [this, editedLogoName](QString logo) {
								   dialog->setSuggestedIconFromFile(
									   logo + ".small", editedLogoName);
							   });
		}
	}
}

void FtbPage::triggerSearch()
{
	filterModel->setSearchTerm(ui->searchEdit->text());
}

void FtbPage::onSortingSelectionChanged(QString data)
{
	auto toSet = filterModel->getAvailableSortings().value(data);
	filterModel->setSorting(toSet);
}

void FtbPage::onSelectionChanged(QModelIndex first, QModelIndex second)
{
	ui->versionSelectionBox->clear();

	if (!first.isValid()) {
		if (isOpened) {
			dialog->setSuggestedPack();
		}
		return;
	}

	selected =
		filterModel->data(first, Qt::UserRole).value<ModpacksCH::Modpack>();

	HoeDown hoedown;
	QString output = hoedown.process(selected.description.toUtf8());
	ui->packDescription->setHtml(output);

	// reverse foreach, so that the newest versions are first
	for (auto i = selected.versions.size(); i--;) {
		ui->versionSelectionBox->addItem(selected.versions.at(i).name);
	}

	suggestCurrent();
}

void FtbPage::onVersionSelectionChanged(QString data)
{
	if (data.isNull() || data.isEmpty()) {
		selectedVersion = "";
		return;
	}

	selectedVersion = data;
	suggestCurrent();
}