// SPDX-License-Identifier: GPL-3.0-only
/*
 *  PolyMC - Minecraft Launcher
 *  Copyright (c) 2022 Jamie Mansfield <jmansfield@cadixdev.org>
 *  Copyright (C) 2022 Sefa Eyeoglu <contact@scrumplex.net>
 *
 *  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, version 3.
 *
 *  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 "ImportPage.h"
#include "ui/dialogs/ProgressDialog.h"
#include "ui_ImportPage.h"

#include <QFileDialog>
#include <QValidator>

#include "ui/dialogs/NewInstanceDialog.h"
#include "ui/dialogs/CustomMessageBox.h"

#include "Json.h"

#include "InstanceImportTask.h"


class UrlValidator : public QValidator
{
public:
    using QValidator::QValidator;

    State validate(QString &in, int &pos) const
    {
        const QUrl url(in);
        if (url.isValid() && !url.isRelative() && !url.isEmpty())
        {
            return Acceptable;
        }
        else if (QFile::exists(in))
        {
            return Acceptable;
        }
        else
        {
            return Intermediate;
        }
    }
};

ImportPage::ImportPage(NewInstanceDialog* dialog, QWidget *parent)
    : QWidget(parent), ui(new Ui::ImportPage), dialog(dialog)
{
    ui->setupUi(this);
    ui->modpackEdit->setValidator(new UrlValidator(ui->modpackEdit));
    connect(ui->modpackEdit, &QLineEdit::textChanged, this, &ImportPage::updateState);
}

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

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

void ImportPage::retranslate()
{
    ui->retranslateUi(this);
}

void ImportPage::openedImpl()
{
    updateState();
}

void ImportPage::updateState()
{
    if (!isOpened) {
        return;
    }
    if (ui->modpackEdit->hasAcceptableInput()) {
        QString input = ui->modpackEdit->text();
        auto url = QUrl::fromUserInput(input);
        if (url.isLocalFile()) {
            // FIXME: actually do some validation of what's inside here... this is fake AF
            QFileInfo fi(input);

            // Allow non-latin people to use ZIP files!
            bool isZip = QMimeDatabase().mimeTypeForUrl(url).suffixes().contains("zip");
            // mrpack is a modrinth pack
            bool isMRPack = fi.suffix() == "mrpack";

            if (fi.exists() && (isZip || isMRPack)) {
                QFileInfo fi(url.fileName());
                dialog->setSuggestedPack(fi.completeBaseName(), new InstanceImportTask(url, this));
                dialog->setSuggestedIcon("default");
            }
        } else if (url.scheme() == "curseforge") {
            // need to find the download link for the modpack
            // format of url curseforge://install?addonId=IDHERE&fileId=IDHERE
            QUrlQuery query(url);
            auto addonId = query.allQueryItemValues("addonId")[0];
            auto fileId = query.allQueryItemValues("fileId")[0];
            auto array = new QByteArray();
            auto req = unique_qobject_ptr<NetJob>(new NetJob("Curseforge Meta", APPLICATION->network()));
            req->addNetAction(
                Net::Download::makeByteArray(QUrl(QString("https://api.curseforge.com/v1/mods/%1/files/%2").arg(addonId, fileId)), array));

            connect(req.get(), &NetJob::finished, [array] { delete array; });
            connect(req.get(), &NetJob::failed, this,
                    [this](QString reason) { CustomMessageBox::selectable(this, tr("Error"), reason, QMessageBox::Critical)->show(); });
            connect(req.get(), &NetJob::succeeded, this, [this, array, addonId, fileId] {
                qDebug() << "Returned CFURL Json:\n" << array->toStdString().c_str();
                auto doc = Json::requireDocument(*array);
                // No way to find out if it's a mod or a modpack before here
                // And also we need to check if it ends with .zip, instead of any better way
                auto fileName = Json::ensureString(Json::ensureObject(Json::ensureObject(doc.object()), "data"), "fileName");
                if (fileName.endsWith(".zip")) {
                    // Have to use ensureString then use QUrl to get proper url encoding
                    auto dl_url = QUrl(
                        Json::ensureString(Json::ensureObject(Json::ensureObject(doc.object()), "data"), "downloadUrl", "", "downloadUrl"));
                    if (!dl_url.isValid()) {
                        CustomMessageBox::selectable(this, tr("Error"), tr("The modpack is blocked ! Please download it manually"),
                                                     QMessageBox::Critical)
                            ->show();
                        return;
                    }

                    QFileInfo dl_file(dl_url.fileName());
                    QString pack_name = Json::ensureString(Json::ensureObject(Json::ensureObject(doc.object()), "data"), "displayName",
                                                           dl_file.completeBaseName(), "displayName");

                    QMap<QString, QString> extra_info;
                    extra_info.insert("pack_id", addonId);
                    extra_info.insert("pack_version_id", fileId);

                    dialog->setSuggestedPack(pack_name, new InstanceImportTask(dl_url, this, std::move(extra_info)));
                    dialog->setSuggestedIcon("default");

                } else {
                    CustomMessageBox::selectable(this, tr("Error"), tr("This url isn't a valid modpack !"), QMessageBox::Critical)->show();
                }
            });
            ProgressDialog dlUrlDialod(this);
            dlUrlDialod.setSkipButton(true, tr("Abort"));
            dlUrlDialod.execWithTask(req.get());
            return;
        } else {
            if (input.endsWith("?client=y")) {
                input.chop(9);
                input.append("/file");
                url = QUrl::fromUserInput(input);
            }
            // hook, line and sinker.
            QFileInfo fi(url.fileName());
            dialog->setSuggestedPack(fi.completeBaseName(), new InstanceImportTask(url, this));
            dialog->setSuggestedIcon("default");
        }
    } else {
        dialog->setSuggestedPack();
    }
}

void ImportPage::setUrl(const QString& url)
{
    ui->modpackEdit->setText(url);
    updateState();
}

void ImportPage::on_modpackBtn_clicked()
{
    auto filter = QMimeDatabase().mimeTypeForName("application/zip").filterString();
    //: Option for filtering for *.mrpack files when importing
    filter += ";;" + tr("Modrinth pack") + " (*.mrpack)";
    const QUrl url = QFileDialog::getOpenFileUrl(this, tr("Choose modpack"), modpackUrl(), filter);
    if (url.isValid())
    {
        if (url.isLocalFile())
        {
            ui->modpackEdit->setText(url.toLocalFile());
        }
        else
        {
            ui->modpackEdit->setText(url.toString());
        }
    }
}


QUrl ImportPage::modpackUrl() const
{
    const QUrl url(ui->modpackEdit->text());
    if (url.isValid() && !url.isRelative() && !url.host().isEmpty())
    {
        return url;
    }
    else
    {
        return QUrl::fromLocalFile(ui->modpackEdit->text());
    }
}