/****************************************************************************
**
** Copyright (C) 2019 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of Qt Creator.
**
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** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
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** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3 as published by the Free Software
** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
** included in the packaging of this file. Please review the following
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#include "qdbstopapplicationstep.h"

#include "qdbconstants.h"

#include <projectexplorer/applicationlauncher.h>
#include <projectexplorer/kitinformation.h>
#include <projectexplorer/projectexplorerconstants.h>
#include <projectexplorer/runcontrol.h>
#include <projectexplorer/target.h>

#include <remotelinux/abstractremotelinuxdeploystep.h>

using namespace ProjectExplorer;
using namespace Utils;

namespace Qdb {
namespace Internal {

// QdbStopApplicationService

class QdbStopApplicationService : public RemoteLinux::AbstractRemoteLinuxDeployService
{
    Q_DECLARE_TR_FUNCTIONS(Qdb::Internal::QdbStopApplicationService)

public:
    QdbStopApplicationService() {}
    ~QdbStopApplicationService() { cleanup(); }

private:
    void handleProcessFinished();
    void handleAppendMessage(const QString &message, OutputFormat format);

    bool isDeploymentNecessary() const final { return true; }

    void doDeploy() final;
    void stopDeployment() final;

    void cleanup();

    ApplicationLauncher m_applicationLauncher;
    QString m_errorOutput;
};

void QdbStopApplicationService::handleProcessFinished()
{
    const QString failureMessage = tr("Could not check and possibly stop running application.");
    if (m_applicationLauncher.exitStatus() == QProcess::CrashExit) {
        emit errorMessage(failureMessage);
        stopDeployment();
        return;
    }

    if (m_errorOutput.contains("Could not connect: Connection refused")) {
        emit progressMessage(tr("Checked that there is no running application."));
    } else if (!m_errorOutput.isEmpty()) {
        emit stdErrData(m_errorOutput);
        emit errorMessage(failureMessage);
    } else {
        emit progressMessage(tr("Stopped the running application."));
    }

    stopDeployment();
}

void QdbStopApplicationService::handleAppendMessage(const QString &message, OutputFormat format)
{
    if (format == StdErrFormat)
        m_errorOutput.append(message);
    else
        emit stdOutData(message);
}

void QdbStopApplicationService::doDeploy()
{
    connect(&m_applicationLauncher, &ApplicationLauncher::errorOccurred,
            this, [this] { emit stdErrData(m_applicationLauncher.errorString()); });
    connect(&m_applicationLauncher, &ApplicationLauncher::finished,
            this, &QdbStopApplicationService::handleProcessFinished);
    connect(&m_applicationLauncher, &ApplicationLauncher::appendMessage,
            this, &QdbStopApplicationService::handleAppendMessage);

    Runnable runnable;
    runnable.command = {Constants::AppcontrollerFilepath, {"--stop"}};
    runnable.workingDirectory = "/usr/bin";
    runnable.device = DeviceKitAspect::device(target()->kit());

    m_applicationLauncher.setRunnable(runnable);
    m_applicationLauncher.start();
}

void QdbStopApplicationService::stopDeployment()
{
    cleanup();
    handleDeploymentDone();
}

void QdbStopApplicationService::cleanup()
{
    m_applicationLauncher.disconnect(this);
}


// QdbStopApplicationStep

class QdbStopApplicationStep final : public RemoteLinux::AbstractRemoteLinuxDeployStep
{
    Q_DECLARE_TR_FUNCTIONS(Qdb::Internal::QdbStopApplicationStep)

public:
    QdbStopApplicationStep(BuildStepList *bsl, Id id)
        : AbstractRemoteLinuxDeployStep(bsl, id)
    {
        auto service = createDeployService<QdbStopApplicationService>();

        setWidgetExpandedByDefault(false);

        setInternalInitializer([service] { return service->isDeploymentPossible(); });
    }
};


// QdbStopApplicationStepFactory

QdbStopApplicationStepFactory::QdbStopApplicationStepFactory()
{
    registerStep<QdbStopApplicationStep>(Constants::QdbStopApplicationStepId);
    setDisplayName(QdbStopApplicationStep::tr("Stop already running application"));
    setSupportedDeviceType(Constants::QdbLinuxOsType);
    setSupportedStepList(ProjectExplorer::Constants::BUILDSTEPS_DEPLOY);
}

} // namespace Internal
} // namespace Qdb