// SPDX-License-Identifier: GPL-3.0-only
/*
 *  Prism Launcher - Minecraft Launcher
 *  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 "JavaCommon.h"
#include "java/JavaUtils.h"
#include "ui/dialogs/CustomMessageBox.h"

#include <QRegularExpression>

bool JavaCommon::checkJVMArgs(QString jvmargs, QWidget* parent)
{
    static const QRegularExpression s_memRegex("-Xm[sx]");
    static const QRegularExpression s_versionRegex("-version:.*");
    if (jvmargs.contains("-XX:PermSize=") || jvmargs.contains(s_memRegex) || jvmargs.contains("-XX-MaxHeapSize") ||
        jvmargs.contains("-XX:InitialHeapSize")) {
        auto warnStr = QObject::tr(
            "You tried to manually set a JVM memory option (using \"-XX:PermSize\", \"-XX-MaxHeapSize\", \"-XX:InitialHeapSize\", \"-Xmx\" "
            "or \"-Xms\").\n"
            "There are dedicated boxes for these in the settings (Java tab, in the Memory group at the top).\n"
            "This message will be displayed until you remove them from the JVM arguments.");
        CustomMessageBox::selectable(parent, QObject::tr("JVM arguments warning"), warnStr, QMessageBox::Warning)->exec();
        return false;
    }
    // block lunacy with passing required version to the JVM
    if (jvmargs.contains(s_versionRegex)) {
        auto warnStr = QObject::tr(
            "You tried to pass required Java version argument to the JVM (using \"-version:xxx\"). This is not safe and will not be "
            "allowed.\n"
            "This message will be displayed until you remove this from the JVM arguments.");
        CustomMessageBox::selectable(parent, QObject::tr("JVM arguments warning"), warnStr, QMessageBox::Warning)->exec();
        return false;
    }
    return true;
}

void JavaCommon::javaWasOk(QWidget* parent, const JavaChecker::Result& result)
{
    QString text;
    text += QObject::tr(
                "Java test succeeded!<br />Platform reported: %1<br />Java version "
                "reported: %2<br />Java vendor "
                "reported: %3<br />")
                .arg(result.realPlatform, result.javaVersion.toString(), result.javaVendor);
    if (result.errorLog.size()) {
        auto htmlError = result.errorLog;
        htmlError.replace('\n', "<br />");
        text += QObject::tr("<br />Warnings:<br /><font color=\"orange\">%1</font>").arg(htmlError);
    }
    CustomMessageBox::selectable(parent, QObject::tr("Java test success"), text, QMessageBox::Information)->show();
}

void JavaCommon::javaArgsWereBad(QWidget* parent, const JavaChecker::Result& result)
{
    auto htmlError = result.errorLog;
    QString text;
    htmlError.replace('\n', "<br />");
    text += QObject::tr("The specified Java binary didn't work with the arguments you provided:<br />");
    text += QString("<font color=\"red\">%1</font>").arg(htmlError);
    CustomMessageBox::selectable(parent, QObject::tr("Java test failure"), text, QMessageBox::Warning)->show();
}

void JavaCommon::javaBinaryWasBad(QWidget* parent, const JavaChecker::Result& result)
{
    QString text;
    text += QObject::tr(
        "The specified Java binary didn't work.<br />You should press 'Detect', "
        "or set the path to the Java executable.<br />");
    CustomMessageBox::selectable(parent, QObject::tr("Java test failure"), text, QMessageBox::Warning)->show();
}

void JavaCommon::javaCheckNotFound(QWidget* parent)
{
    QString text;
    text += QObject::tr("Java checker library could not be found. Please check your installation.");
    CustomMessageBox::selectable(parent, QObject::tr("Java test failure"), text, QMessageBox::Warning)->show();
}

void JavaCommon::TestCheck::run()
{
    if (!JavaCommon::checkJVMArgs(m_args, m_parent)) {
        emit finished();
        return;
    }
    if (JavaUtils::getJavaCheckPath().isEmpty()) {
        javaCheckNotFound(m_parent);
        emit finished();
        return;
    }
    checker.reset(new JavaChecker(m_path, "", 0, 0, 0, 0));
    connect(checker.get(), &JavaChecker::checkFinished, this, &JavaCommon::TestCheck::checkFinished);
    checker->start();
}

void JavaCommon::TestCheck::checkFinished(const JavaChecker::Result& result)
{
    if (result.validity != JavaChecker::Result::Validity::Valid) {
        javaBinaryWasBad(m_parent, result);
        emit finished();
        return;
    }
    checker.reset(new JavaChecker(m_path, m_args, m_maxMem, m_maxMem, result.javaVersion.requiresPermGen() ? m_permGen : 0, 0));
    connect(checker.get(), &JavaChecker::checkFinished, this, &JavaCommon::TestCheck::checkFinishedWithArgs);
    checker->start();
}

void JavaCommon::TestCheck::checkFinishedWithArgs(const JavaChecker::Result& result)
{
    if (result.validity == JavaChecker::Result::Validity::Valid) {
        javaWasOk(m_parent, result);
        emit finished();
        return;
    }
    javaArgsWereBad(m_parent, result);
    emit finished();
}
