/* Copyright 2013-2019 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 <QFileInfo>
#include <minecraft/launch/LauncherPartLaunch.h>
#include <QDir>
#include <settings/Setting.h>

#include "LegacyInstance.h"

#include "minecraft/legacy/LegacyModList.h"
#include "minecraft/WorldList.h"
#include <MMCZip.h>
#include <FileSystem.h>

LegacyInstance::LegacyInstance(SettingsObjectPtr globalSettings, SettingsObjectPtr settings, const QString &rootDir)
    : BaseInstance(globalSettings, settings, rootDir)
{
    settings->registerSetting("NeedsRebuild", true);
    settings->registerSetting("ShouldUpdate", false);
    settings->registerSetting("JarVersion", QString());
    settings->registerSetting("IntendedJarVersion", QString());
    /*
     * custom base jar has no default. it is determined in code... see the accessor methods for
     *it
     *
     * for instances that DO NOT have the CustomBaseJar setting (legacy instances),
     * [.]minecraft/bin/mcbackup.jar is the default base jar
     */
    settings->registerSetting("UseCustomBaseJar", true);
    settings->registerSetting("CustomBaseJar", "");
}

QString LegacyInstance::mainJarToPreserve() const
{
    bool customJar = m_settings->get("UseCustomBaseJar").toBool();
    if(customJar)
    {
        auto base = baseJar();
        if(QFile::exists(base))
        {
            return base;
        }
    }
    auto runnable = runnableJar();
    if(QFile::exists(runnable))
    {
        return runnable;
    }
    return QString();
}


QString LegacyInstance::baseJar() const
{
    bool customJar = m_settings->get("UseCustomBaseJar").toBool();
    if (customJar)
    {
        return customBaseJar();
    }
    else
        return defaultBaseJar();
}

QString LegacyInstance::customBaseJar() const
{
    QString value = m_settings->get("CustomBaseJar").toString();
    if (value.isNull() || value.isEmpty())
    {
        return defaultCustomBaseJar();
    }
    return value;
}

bool LegacyInstance::shouldUseCustomBaseJar() const
{
    return m_settings->get("UseCustomBaseJar").toBool();
}


shared_qobject_ptr<Task> LegacyInstance::createUpdateTask(Net::Mode)
{
    return nullptr;
}

std::shared_ptr<LegacyModList> LegacyInstance::jarModList() const
{
    if (!jar_mod_list)
    {
        auto list = new LegacyModList(jarModsDir(), modListFile());
        jar_mod_list.reset(list);
    }
    jar_mod_list->update();
    return jar_mod_list;
}

QString LegacyInstance::gameRoot() const
{
    QFileInfo mcDir(FS::PathCombine(instanceRoot(), "minecraft"));
    QFileInfo dotMCDir(FS::PathCombine(instanceRoot(), ".minecraft"));

    if (mcDir.exists() && !dotMCDir.exists())
        return mcDir.filePath();
    else
        return dotMCDir.filePath();
}

QString LegacyInstance::binRoot() const
{
    return FS::PathCombine(gameRoot(), "bin");
}

QString LegacyInstance::jarModsDir() const
{
    return FS::PathCombine(instanceRoot(), "instMods");
}

QString LegacyInstance::libDir() const
{
    return FS::PathCombine(gameRoot(), "lib");
}

QString LegacyInstance::savesDir() const
{
    return FS::PathCombine(gameRoot(), "saves");
}

QString LegacyInstance::loaderModsDir() const
{
    return FS::PathCombine(gameRoot(), "mods");
}

QString LegacyInstance::coreModsDir() const
{
    return FS::PathCombine(gameRoot(), "coremods");
}

QString LegacyInstance::resourceDir() const
{
    return FS::PathCombine(gameRoot(), "resources");
}
QString LegacyInstance::texturePacksDir() const
{
    return FS::PathCombine(gameRoot(), "texturepacks");
}

QString LegacyInstance::runnableJar() const
{
    return FS::PathCombine(binRoot(), "minecraft.jar");
}

QString LegacyInstance::modListFile() const
{
    return FS::PathCombine(instanceRoot(), "modlist");
}

QString LegacyInstance::instanceConfigFolder() const
{
    return FS::PathCombine(gameRoot(), "config");
}

bool LegacyInstance::shouldRebuild() const
{
    return m_settings->get("NeedsRebuild").toBool();
}

QString LegacyInstance::currentVersionId() const
{
    return m_settings->get("JarVersion").toString();
}

QString LegacyInstance::intendedVersionId() const
{
    return m_settings->get("IntendedJarVersion").toString();
}

bool LegacyInstance::shouldUpdate() const
{
    QVariant var = settings()->get("ShouldUpdate");
    if (!var.isValid() || var.toBool() == false)
    {
        return intendedVersionId() != currentVersionId();
    }
    return true;
}

QString LegacyInstance::defaultBaseJar() const
{
    return "versions/" + intendedVersionId() + "/" + intendedVersionId() + ".jar";
}

QString LegacyInstance::defaultCustomBaseJar() const
{
    return FS::PathCombine(binRoot(), "mcbackup.jar");
}

std::shared_ptr<WorldList> LegacyInstance::worldList() const
{
    if (!m_world_list)
    {
        m_world_list.reset(new WorldList(savesDir()));
    }
    return m_world_list;
}

QString LegacyInstance::typeName() const
{
    return tr("Legacy");
}

QString LegacyInstance::getStatusbarDescription()
{
    return tr("Instance from previous versions.");
}

QStringList LegacyInstance::verboseDescription(AuthSessionPtr session)
{
    QStringList out;

    auto alltraits = traits();
    if(alltraits.size())
    {
        out << "Traits:";
        for (auto trait : alltraits)
        {
            out << "  " + trait;
        }
        out << "";
    }

    QString windowParams;
    if (settings()->get("LaunchMaximized").toBool())
    {
        out << "Window size: max (if available)";
    }
    else
    {
        auto width = settings()->get("MinecraftWinWidth").toInt();
        auto height = settings()->get("MinecraftWinHeight").toInt();
        out << "Window size: " + QString::number(width) + " x " + QString::number(height);
    }
    out << "";
    return out;
}