// SPDX-License-Identifier: GPL-3.0-only
/*
 *  PolyMC - Minecraft Launcher
 *  Copyright (c) 2022 Jamie Mansfield <jmansfield@cadixdev.org>
 *
 *  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 "VanillaPage.h"
#include "ui_VanillaPage.h"

#include <QTabBar>

#include "Application.h"
#include "meta/Index.h"
#include "meta/VersionList.h"
#include "ui/dialogs/NewInstanceDialog.h"
#include "Filter.h"
#include "InstanceCreationTask.h"
#include "Version.h"

VanillaPage::VanillaPage(NewInstanceDialog *dialog, QWidget *parent)
    : QWidget(parent), dialog(dialog), ui(new Ui::VanillaPage)
{
    ui->setupUi(this);
    ui->tabWidget->tabBar()->hide();
    connect(ui->versionList, &VersionSelectWidget::selectedVersionChanged, this, &VanillaPage::setSelectedVersion);
    filterChanged();
    connect(ui->alphaFilter, &QCheckBox::stateChanged, this, &VanillaPage::filterChanged);
    connect(ui->betaFilter, &QCheckBox::stateChanged, this, &VanillaPage::filterChanged);
    connect(ui->snapshotFilter, &QCheckBox::stateChanged, this, &VanillaPage::filterChanged);
    connect(ui->oldSnapshotFilter, &QCheckBox::stateChanged, this, &VanillaPage::filterChanged);
    connect(ui->releaseFilter, &QCheckBox::stateChanged, this, &VanillaPage::filterChanged);
    connect(ui->experimentsFilter, &QCheckBox::stateChanged, this, &VanillaPage::filterChanged);
    connect(ui->refreshBtn, &QPushButton::clicked, this, &VanillaPage::refresh);

    connect(ui->loaderVersionList, &VersionSelectWidget::selectedVersionChanged, this, &VanillaPage::setSelectedLoaderVersion);
    connect(ui->noneFilter, &QRadioButton::toggled, this, &VanillaPage::loaderFilterChanged);
    connect(ui->forgeFilter, &QRadioButton::toggled, this, &VanillaPage::loaderFilterChanged);
    connect(ui->fabricFilter, &QRadioButton::toggled, this, &VanillaPage::loaderFilterChanged);
    connect(ui->quiltFilter, &QRadioButton::toggled, this, &VanillaPage::loaderFilterChanged);
    connect(ui->liteLoaderFilter, &QRadioButton::toggled, this, &VanillaPage::loaderFilterChanged);
    connect(ui->loaderRefreshBtn, &QPushButton::clicked, this, &VanillaPage::loaderRefresh);

}

void VanillaPage::openedImpl()
{
    if(!initialized)
    {
        auto vlist = APPLICATION->metadataIndex()->get("net.minecraft");
        ui->versionList->initialize(vlist.get());
        initialized = true;
    }
    else
    {
        suggestCurrent();
    }
}

void VanillaPage::refresh()
{
    ui->versionList->loadList();
}

void VanillaPage::loaderRefresh()
{
    if(ui->noneFilter->isChecked())
        return;
    ui->loaderVersionList->loadList();
}

void VanillaPage::filterChanged()
{
    QStringList out;
    if(ui->alphaFilter->isChecked())
        out << "(old_alpha)";
    if(ui->betaFilter->isChecked())
        out << "(old_beta)";
    if(ui->snapshotFilter->isChecked())
        out << "(snapshot)";
    if(ui->oldSnapshotFilter->isChecked())
        out << "(old_snapshot)";
    if(ui->releaseFilter->isChecked())
        out << "(release)";
    if(ui->experimentsFilter->isChecked())
        out << "(experiment)";
    auto regexp = out.join('|');
    ui->versionList->setFilter(BaseVersionList::TypeRole, new RegexpFilter(regexp, false));
}

void VanillaPage::loaderFilterChanged()
{
    QString minecraftVersion;
    if (m_selectedVersion)
    {
        minecraftVersion = m_selectedVersion->descriptor();
    }
    else
    {
        ui->loaderVersionList->setExactFilter(BaseVersionList::ParentVersionRole, "AAA"); // empty list
        ui->loaderVersionList->setEmptyString(tr("No Minecraft version is selected."));
        ui->loaderVersionList->setEmptyMode(VersionListView::String);
        return;
    }
    if(ui->noneFilter->isChecked())
    {
        ui->loaderVersionList->setExactFilter(BaseVersionList::ParentVersionRole, "AAA"); // empty list
        ui->loaderVersionList->setEmptyString(tr("No mod loader is selected."));
        ui->loaderVersionList->setEmptyMode(VersionListView::String);
        return;
    }
    else if(ui->forgeFilter->isChecked())
    {
        ui->loaderVersionList->setExactFilter(BaseVersionList::ParentVersionRole, minecraftVersion);
        m_selectedLoader = "net.minecraftforge";
    }
    else if(ui->fabricFilter->isChecked())
    {
        // FIXME: dirty hack because the launcher is unaware of Fabric's dependencies
        if (Version(minecraftVersion) >= Version("1.14")) // Fabric/Quilt supported
            ui->loaderVersionList->setExactFilter(BaseVersionList::ParentVersionRole, "");
        else // Fabric/Quilt unsupported
            ui->loaderVersionList->setExactFilter(BaseVersionList::ParentVersionRole, "AAA"); // clear list
        m_selectedLoader = "net.fabricmc.fabric-loader";
    }
    else if(ui->quiltFilter->isChecked())
    {
        // FIXME: dirty hack because the launcher is unaware of Quilt's dependencies (same as Fabric)
        if (Version(minecraftVersion) >= Version("1.14")) // Fabric/Quilt supported
            ui->loaderVersionList->setExactFilter(BaseVersionList::ParentVersionRole, "");
        else // Fabric/Quilt unsupported
            ui->loaderVersionList->setExactFilter(BaseVersionList::ParentVersionRole, "AAA"); // clear list
        m_selectedLoader = "org.quiltmc.quilt-loader";
    }
    else if(ui->liteLoaderFilter->isChecked())
    {
        ui->loaderVersionList->setExactFilter(BaseVersionList::ParentVersionRole, minecraftVersion);
        m_selectedLoader = "com.mumfrey.liteloader";
    }

    auto vlist = APPLICATION->metadataIndex()->get(m_selectedLoader);
    ui->loaderVersionList->initialize(vlist.get());
    ui->loaderVersionList->selectRecommended();
    ui->loaderVersionList->setEmptyString(tr("No versions are currently available for Minecraft %1").arg(minecraftVersion));
}

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

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

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

BaseVersionPtr VanillaPage::selectedVersion() const
{
    return m_selectedVersion;
}

BaseVersionPtr VanillaPage::selectedLoaderVersion() const
{
    return m_selectedLoaderVersion;
}

QString VanillaPage::selectedLoader() const
{
    return m_selectedLoader;
}

void VanillaPage::suggestCurrent()
{
    if (!isOpened)
    {
        return;
    }
        
    if(!m_selectedVersion)
    {
        dialog->setSuggestedPack();
        return;
    }

    // There isn't a selected version if the version list is empty
    if(ui->loaderVersionList->selectedVersion() == nullptr)
        dialog->setSuggestedPack(m_selectedVersion->descriptor(), new InstanceCreationTask(m_selectedVersion));
    else
    {
        dialog->setSuggestedPack(m_selectedVersion->descriptor(),
                                 new InstanceCreationTask(m_selectedVersion, m_selectedLoader,
                                                          m_selectedLoaderVersion));
    }
    dialog->setSuggestedIcon("default");
}

void VanillaPage::setSelectedVersion(BaseVersionPtr version)
{
    m_selectedVersion = version;
    suggestCurrent();
    loaderFilterChanged();
}

void VanillaPage::setSelectedLoaderVersion(BaseVersionPtr version)
{
    m_selectedLoaderVersion = version;
    suggestCurrent();
}