/* 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 "AtlPage.h"
#include "ui_AtlPage.h"

#include "modplatform/atlauncher/ATLPackInstallTask.h"

#include "AtlOptionalModDialog.h"
#include "ui/dialogs/NewInstanceDialog.h"
#include "ui/dialogs/VersionSelectDialog.h"

#include <BuildConfig.h>

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

	filterModel = new Atl::FilterModel(this);
	listModel = new Atl::ListModel(this);
	filterModel->setSourceModel(listModel);
	ui->packView->setModel(filterModel);
	ui->packView->setSortingEnabled(true);

	ui->packView->header()->hide();
	ui->packView->setIndentation(0);

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

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

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

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

	suggestCurrent();
}

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

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

	dialog->setSuggestedPack(selected.name + " " + selectedVersion,
							 new ATLauncher::PackInstallTask(
								 this, selected.safeName, selectedVersion));
	auto editedLogoName = selected.safeName;
	auto url =
		QString(BuildConfig.ATL_DOWNLOAD_SERVER_URL + "launcher/images/%1.png")
			.arg(selected.safeName.toLower());
	listModel->getLogo(
		selected.safeName, url, [this, editedLogoName](QString logo) {
			dialog->setSuggestedIconFromFile(logo, editedLogoName);
		});
}

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

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

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

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

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

	ui->packDescription->setHtml(selected.description.replace("\n", "<br>"));

	for (const auto& version : selected.versions) {
		ui->versionSelectionBox->addItem(version.version);
	}

	suggestCurrent();
}

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

	selectedVersion = data;
	suggestCurrent();
}

QVector<QString>
AtlPage::chooseOptionalMods(QVector<ATLauncher::VersionMod> mods)
{
	AtlOptionalModDialog optionalModDialog(this, mods);
	optionalModDialog.exec();
	return optionalModDialog.getResult();
}

QString AtlPage::chooseVersion(Meta::VersionListPtr vlist,
							   QString minecraftVersion)
{
	VersionSelectDialog vselect(vlist.get(), "Choose Version",
								APPLICATION->activeWindow(), false);
	if (minecraftVersion != Q_NULLPTR) {
		vselect.setExactFilter(BaseVersionList::ParentVersionRole,
							   minecraftVersion);
		vselect.setEmptyString(
			tr("No versions are currently available for Minecraft %1")
				.arg(minecraftVersion));
	} else {
		vselect.setEmptyString(tr("No versions are currently available"));
	}
	vselect.setEmptyErrorString(
		tr("Couldn't load or download the version lists!"));

	// select recommended build
	for (int i = 0; i < vlist->versions().size(); i++) {
		auto version = vlist->versions().at(i);
		auto reqs = version->requirements();

		// filter by minecraft version, if the loader depends on a certain
		// version.
		if (minecraftVersion != Q_NULLPTR) {
			auto iter = std::find_if(reqs.begin(), reqs.end(),
									 [](const Meta::Require& req) {
										 return req.uid == "net.minecraft";
									 });
			if (iter == reqs.end())
				continue;
			if (iter->equalsVersion != minecraftVersion)
				continue;
		}

		// first recommended build we find, we use.
		if (version->isRecommended()) {
			vselect.setCurrentVersion(version->descriptor());
			break;
		}
	}

	vselect.exec();
	return vselect.selectedVersion()->descriptor();
}