/* 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 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 "TechnicPage.h"
#include "ui_TechnicPage.h"

#include <QKeyEvent>

#include "ui/dialogs/NewInstanceDialog.h"

#include "TechnicModel.h"
#include "modplatform/technic/SingleZipPackInstallTask.h"
#include "modplatform/technic/SolderPackInstallTask.h"
#include "Json.h"

#include "Application.h"

TechnicPage::TechnicPage(NewInstanceDialog* dialog, QWidget* parent)
	: QWidget(parent), ui(new Ui::TechnicPage), dialog(dialog)
{
	ui->setupUi(this);
	connect(ui->searchButton, &QPushButton::clicked, this,
			&TechnicPage::triggerSearch);
	ui->searchEdit->installEventFilter(this);
	model = new Technic::ListModel(this);
	ui->packView->setModel(model);
	connect(ui->packView->selectionModel(),
			&QItemSelectionModel::currentChanged, this,
			&TechnicPage::onSelectionChanged);
}

bool TechnicPage::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);
}

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

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

void TechnicPage::openedImpl()
{
	suggestCurrent();
	triggerSearch();
}

void TechnicPage::triggerSearch()
{
	model->searchWithTerm(ui->searchEdit->text());
}

void TechnicPage::onSelectionChanged(QModelIndex first, QModelIndex second)
{
	if (!first.isValid()) {
		if (isOpened) {
			dialog->setSuggestedPack();
		}
		// ui->frame->clear();
		return;
	}

	current = model->data(first, Qt::UserRole).value<Technic::Modpack>();
	suggestCurrent();
}

void TechnicPage::suggestCurrent()
{
	if (!isOpened) {
		return;
	}
	if (current.broken) {
		dialog->setSuggestedPack();
		return;
	}

	QString editedLogoName = "technic_" + current.logoName.section(".", 0, 0);
	model->getLogo(current.logoName, current.logoUrl,
				   [this, editedLogoName](QString logo) {
					   dialog->setSuggestedIconFromFile(logo, editedLogoName);
				   });

	if (current.metadataLoaded) {
		metadataLoaded();
		return;
	}

	NetJob* netJob =
		new NetJob(QString("Technic::PackMeta(%1)").arg(current.name),
				   APPLICATION->network());
	std::shared_ptr<QByteArray> response = std::make_shared<QByteArray>();
	QString slug = current.slug;
	netJob->addNetAction(Net::Download::makeByteArray(
		QString("https://api.technicpack.net/modpack/%1?build=meshmc")
			.arg(slug),
		response.get()));
	QObject::connect(netJob, &NetJob::succeeded, this, [this, response, slug] {
		if (current.slug != slug) {
			return;
		}
		QJsonParseError parse_error;
		QJsonDocument doc = QJsonDocument::fromJson(*response, &parse_error);
		QJsonObject obj = doc.object();
		if (parse_error.error != QJsonParseError::NoError) {
			qWarning() << "Error while parsing JSON response from Technic at "
					   << parse_error.offset
					   << " reason: " << parse_error.errorString();
			qWarning() << *response;
			return;
		}
		if (!obj.contains("url")) {
			qWarning() << "Json doesn't contain an url key";
			return;
		}
		QJsonValueRef url = obj["url"];
		if (url.isString()) {
			current.url = url.toString();
		} else {
			if (!obj.contains("solder")) {
				qWarning() << "Json doesn't contain a valid url or solder key";
				return;
			}
			QJsonValueRef solderUrl = obj["solder"];
			if (solderUrl.isString()) {
				current.url = solderUrl.toString();
				current.isSolder = true;
			} else {
				qWarning() << "Json doesn't contain a valid url or solder key";
				return;
			}
		}

		current.minecraftVersion =
			Json::ensureString(obj, "minecraft", QString(), "__placeholder__");
		current.websiteUrl = Json::ensureString(obj, "platformUrl", QString(),
												"__placeholder__");
		current.author =
			Json::ensureString(obj, "user", QString(), "__placeholder__");
		current.description = Json::ensureString(obj, "description", QString(),
												 "__placeholder__");
		current.metadataLoaded = true;
		metadataLoaded();
	});
	netJob->start();
}

// expects current.metadataLoaded to be true
void TechnicPage::metadataLoaded()
{
	QString text = "";
	QString name = current.name;

	if (current.websiteUrl.isEmpty())
		// This allows injecting HTML here.
		text = name;
	else
		// URL not properly escaped for inclusion in HTML. The name allows for
		// injecting HTML.
		text = "<a href=\"" + current.websiteUrl + "\">" + name + "</a>";
	if (!current.author.isEmpty()) {
		// This allows injecting HTML here
		text += tr(" by ") + current.author;
	}

	ui->frame->setModText(text);
	ui->frame->setModDescription(current.description);
	if (!current.isSolder) {
		dialog->setSuggestedPack(current.name,
								 new Technic::SingleZipPackInstallTask(
									 current.url, current.minecraftVersion));
	} else {
		while (current.url.endsWith('/'))
			current.url.chop(1);
		dialog->setSuggestedPack(current.name,
								 new Technic::SolderPackInstallTask(
									 APPLICATION->network(),
									 current.url + "/modpack/" + current.slug,
									 current.minecraftVersion));
	}
}