/* 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 "JavaPage.h"
#include "JavaCommon.h"
#include "ui_JavaPage.h"

#include <QFileDialog>
#include <QMessageBox>
#include <QDir>
#include <QTabBar>

#include "dialogs/VersionSelectDialog.h"

#include "java/JavaUtils.h"
#include "java/JavaInstallList.h"

#include "settings/SettingsObject.h"
#include <FileSystem.h>
#include "Launcher.h"
#include <sys.h>

JavaPage::JavaPage(QWidget *parent) : QWidget(parent), ui(new Ui::JavaPage)
{
    ui->setupUi(this);
    ui->tabWidget->tabBar()->hide();

    auto sysMiB = Sys::getSystemRam() / Sys::mebibyte;
    ui->maxMemSpinBox->setMaximum(sysMiB);
    loadSettings();
}

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

bool JavaPage::apply()
{
    applySettings();
    return true;
}

void JavaPage::applySettings()
{
    auto s = LAUNCHER->settings();

    // Memory
    int min = ui->minMemSpinBox->value();
    int max = ui->maxMemSpinBox->value();
    if(min < max)
    {
        s->set("MinMemAlloc", min);
        s->set("MaxMemAlloc", max);
    }
    else
    {
        s->set("MinMemAlloc", max);
        s->set("MaxMemAlloc", min);
    }
    s->set("PermGen", ui->permGenSpinBox->value());

    // Java Settings
    s->set("JavaPath", ui->javaPathTextBox->text());
    s->set("JvmArgs", ui->jvmArgsTextBox->text());
    JavaCommon::checkJVMArgs(s->get("JvmArgs").toString(), this->parentWidget());
}
void JavaPage::loadSettings()
{
    auto s = LAUNCHER->settings();
    // Memory
    int min = s->get("MinMemAlloc").toInt();
    int max = s->get("MaxMemAlloc").toInt();
    if(min < max)
    {
        ui->minMemSpinBox->setValue(min);
        ui->maxMemSpinBox->setValue(max);
    }
    else
    {
        ui->minMemSpinBox->setValue(max);
        ui->maxMemSpinBox->setValue(min);
    }
    ui->permGenSpinBox->setValue(s->get("PermGen").toInt());

    // Java Settings
    ui->javaPathTextBox->setText(s->get("JavaPath").toString());
    ui->jvmArgsTextBox->setText(s->get("JvmArgs").toString());
}

void JavaPage::on_javaDetectBtn_clicked()
{
    JavaInstallPtr java;

    VersionSelectDialog vselect(LAUNCHER->javalist().get(), tr("Select a Java version"), this, true);
    vselect.setResizeOn(2);
    vselect.exec();

    if (vselect.result() == QDialog::Accepted && vselect.selectedVersion())
    {
        java = std::dynamic_pointer_cast<JavaInstall>(vselect.selectedVersion());
        ui->javaPathTextBox->setText(java->path);
    }
}

void JavaPage::on_javaBrowseBtn_clicked()
{
    QString raw_path = QFileDialog::getOpenFileName(this, tr("Find Java executable"));

    // do not allow current dir - it's dirty. Do not allow dirs that don't exist
    if(raw_path.isEmpty())
    {
        return;
    }

    QString cooked_path = FS::NormalizePath(raw_path);
    QFileInfo javaInfo(cooked_path);;
    if(!javaInfo.exists() || !javaInfo.isExecutable())
    {
        return;
    }
    ui->javaPathTextBox->setText(cooked_path);
}

void JavaPage::on_javaTestBtn_clicked()
{
    if(checker)
    {
        return;
    }
    checker.reset(new JavaCommon::TestCheck(
        this, ui->javaPathTextBox->text(), ui->jvmArgsTextBox->text(),
        ui->minMemSpinBox->value(), ui->maxMemSpinBox->value(), ui->permGenSpinBox->value()));
    connect(checker.get(), SIGNAL(finished()), SLOT(checkerFinished()));
    checker->run();
}

void JavaPage::checkerFinished()
{
    checker.reset();
}
