/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
 * This file is part of the LibreOffice project.
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 *
 * This file incorporates work covered by the following license notice:
 *
 *   Licensed to the Apache Software Foundation (ASF) under one or more
 *   contributor license agreements. See the NOTICE file distributed
 *   with this work for additional information regarding copyright
 *   ownership. The ASF licenses this file to you 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 .
 */


#include "dp_gui_updatedata.hxx"

#include <sal/config.h>
#include <osl/diagnose.h>
#include <osl/file.hxx>
#include <cppuhelper/exc_hlp.hxx>
#include <utility>
#include <vcl/svapp.hxx>
#include <cppuhelper/implbase.hxx>

#include <com/sun/star/beans/NamedValue.hpp>
#include <com/sun/star/lang/WrappedTargetException.hpp>
#include <com/sun/star/ucb/NameClash.hpp>
#include <com/sun/star/ucb/XCommandEnvironment.hpp>
#include <com/sun/star/ucb/XProgressHandler.hpp>
#include <com/sun/star/deployment/DeploymentException.hpp>
#include <com/sun/star/deployment/ExtensionManager.hpp>
#include <com/sun/star/deployment/LicenseException.hpp>
#include <com/sun/star/deployment/VersionException.hpp>
#include <com/sun/star/task/XInteractionHandler.hpp>
#include <com/sun/star/task/XInteractionApprove.hpp>

#include <dp_descriptioninfoset.hxx>
#include <strings.hrc>
#include "dp_gui_updateinstalldialog.hxx"
#include <dp_shared.hxx>
#include <dp_ucb.h>
#include <dp_misc.h>
#include "dp_gui_extensioncmdqueue.hxx"
#include <ucbhelper/content.hxx>
#include <rtl/ustrbuf.hxx>
#include <rtl/ref.hxx>
#include <salhelper/thread.hxx>
#include <com/sun/star/uno/Sequence.h>
#include <comphelper/anytostring.hxx>

#include <string_view>
#include <vector>

using dp_misc::StrTitle;

namespace dp_gui {

class UpdateInstallDialog::Thread: public salhelper::Thread {
    friend class UpdateCommandEnv;
public:
    Thread(css::uno::Reference< css::uno::XComponentContext > const & ctx,
        UpdateInstallDialog & dialog, std::vector< dp_gui::UpdateData > & aVecUpdateData);

    void stop();

private:
    virtual ~Thread() override;

    virtual void execute() override;
    void downloadExtensions();
    bool download(OUString const & aUrls, UpdateData & aUpdatData);
    void installExtensions();
    void removeTempDownloads();

    UpdateInstallDialog & m_dialog;

    // guarded by Application::GetSolarMutex():
    css::uno::Reference< css::task::XAbortChannel > m_abort;
    css::uno::Reference< css::uno::XComponentContext > m_xComponentContext;
    std::vector< dp_gui::UpdateData > & m_aVecUpdateData;
    ::rtl::Reference<UpdateCommandEnv> m_updateCmdEnv;

    //A folder which is created in the temp directory in which then the updates are downloaded
    OUString m_sDownloadFolder;

    bool m_stop;

};

class UpdateCommandEnv
    : public ::cppu::WeakImplHelper< css::ucb::XCommandEnvironment,
                                      css::task::XInteractionHandler,
                                      css::ucb::XProgressHandler >
{
    friend class UpdateInstallDialog::Thread;

    ::rtl::Reference<UpdateInstallDialog::Thread> m_installThread;
    css::uno::Reference< css::uno::XComponentContext > m_xContext;

public:
    UpdateCommandEnv( css::uno::Reference< css::uno::XComponentContext > xCtx,
        ::rtl::Reference<UpdateInstallDialog::Thread> thread);

    // XCommandEnvironment
    virtual css::uno::Reference<css::task::XInteractionHandler > SAL_CALL
    getInteractionHandler() override;
    virtual css::uno::Reference<css::ucb::XProgressHandler >
    SAL_CALL getProgressHandler() override;

    // XInteractionHandler
    virtual void SAL_CALL handle(
        css::uno::Reference<css::task::XInteractionRequest > const & xRequest ) override;

    // XProgressHandler
    virtual void SAL_CALL push( css::uno::Any const & Status ) override;
    virtual void SAL_CALL update( css::uno::Any const & Status ) override;
    virtual void SAL_CALL pop() override;
};


UpdateInstallDialog::Thread::Thread(
    css::uno::Reference< css::uno::XComponentContext> const & xCtx,
    UpdateInstallDialog & dialog,
    std::vector< dp_gui::UpdateData > & aVecUpdateData):
    salhelper::Thread("dp_gui_updateinstalldialog"),
    m_dialog(dialog),
    m_xComponentContext(xCtx),
    m_aVecUpdateData(aVecUpdateData),
    m_updateCmdEnv(new UpdateCommandEnv(xCtx, this)),
    m_stop(false)
{}

void UpdateInstallDialog::Thread::stop() {
    css::uno::Reference< css::task::XAbortChannel > abort;
    {
        SolarMutexGuard g;
        abort = m_abort;
        m_stop = true;
    }
    if (abort.is()) {
        abort->sendAbort();
    }
}

UpdateInstallDialog::Thread::~Thread() {}

void UpdateInstallDialog::Thread::execute()
{
    try {
        downloadExtensions();
        installExtensions();
    }
    catch (...)
    {
    }

    //clean up the temp directories
    try {
        removeTempDownloads();
    } catch( ... ) {
    }

    {
        //make sure m_dialog is still alive
        SolarMutexGuard g;
        if (! m_stop)
             m_dialog.updateDone();
    }
    //UpdateCommandEnv keeps a reference to Thread and prevents destruction. Therefore remove it.
    m_updateCmdEnv->m_installThread.clear();
}

UpdateInstallDialog::UpdateInstallDialog(
    weld::Window* pParent,
    std::vector<dp_gui::UpdateData> & aVecUpdateData,
    css::uno::Reference< css::uno::XComponentContext > const & xCtx)
    : GenericDialogController(pParent, u"desktop/ui/updateinstalldialog.ui"_ustr,
                              u"UpdateInstallDialog"_ustr)
    , m_thread(new Thread(xCtx, *this, aVecUpdateData))
    , m_bError(false)
    , m_bNoEntry(true)
    , m_sInstalling(DpResId(RID_DLG_UPDATE_INSTALL_INSTALLING))
    , m_sFinished(DpResId(RID_DLG_UPDATE_INSTALL_FINISHED))
    , m_sNoErrors(DpResId(RID_DLG_UPDATE_INSTALL_NO_ERRORS))
    , m_sErrorDownload(DpResId(RID_DLG_UPDATE_INSTALL_ERROR_DOWNLOAD))
    , m_sErrorInstallation(DpResId(RID_DLG_UPDATE_INSTALL_ERROR_INSTALLATION))
    , m_sErrorLicenseDeclined(DpResId(RID_DLG_UPDATE_INSTALL_ERROR_LIC_DECLINED))
    , m_sNoInstall(DpResId(RID_DLG_UPDATE_INSTALL_EXTENSION_NOINSTALL))
    , m_sThisErrorOccurred(DpResId(RID_DLG_UPDATE_INSTALL_THIS_ERROR_OCCURRED))
    , m_xFt_action(m_xBuilder->weld_label(u"DOWNLOADING"_ustr))
    , m_xStatusbar(m_xBuilder->weld_progress_bar(u"STATUSBAR"_ustr))
    , m_xFt_extension_name(m_xBuilder->weld_label(u"EXTENSION_NAME"_ustr))
    , m_xMle_info(m_xBuilder->weld_text_view(u"INFO"_ustr))
    , m_xHelp(m_xBuilder->weld_button(u"help"_ustr))
    , m_xOk(m_xBuilder->weld_button(u"ok"_ustr))
    , m_xCancel(m_xBuilder->weld_button(u"cancel"_ustr))
{
    m_xMle_info->set_size_request(m_xMle_info->get_approximate_digit_width() * 52,
                                  m_xMle_info->get_height_rows(5));

    m_xExtensionManager = css::deployment::ExtensionManager::get( xCtx );

    m_xCancel->connect_clicked(LINK(this, UpdateInstallDialog, cancelHandler));
    if ( ! dp_misc::office_is_running())
        m_xHelp->set_sensitive(false);
}

UpdateInstallDialog::~UpdateInstallDialog()
{
}

short UpdateInstallDialog::run()
{
    m_thread->launch();
    short nRet = GenericDialogController::run();
    m_thread->stop();
    return nRet;
}

// make sure the solar mutex is locked before calling
void UpdateInstallDialog::updateDone()
{
    if (!m_bError)
        m_xMle_info->set_text(m_xMle_info->get_text() + m_sNoErrors);
    m_xOk->set_sensitive(true);
    m_xOk->grab_focus();
    m_xCancel->set_sensitive(false);
}

// make sure the solar mutex is locked before calling
//sets an error message in the text area
void UpdateInstallDialog::setError(INSTALL_ERROR err, std::u16string_view sExtension,
    std::u16string_view exceptionMessage)
{
    OUString sError;
    m_bError = true;

    switch (err)
    {
    case ERROR_DOWNLOAD:
        sError = m_sErrorDownload;
        break;
    case ERROR_INSTALLATION:
        sError = m_sErrorInstallation;
        break;
    case ERROR_LICENSE_DECLINED:
        sError = m_sErrorLicenseDeclined;
        break;

    default:
        OSL_ASSERT(false);
    }

    OUString sMsg(m_xMle_info->get_text());
    sError = sError.replaceFirst("%NAME", sExtension);
    //We want to have an empty line between the error messages. However,
    //there shall be no empty line after the last entry.
    if (m_bNoEntry)
        m_bNoEntry = false;
    else
        sMsg += "\n";
    sMsg += sError;
    //Insert more information about the error
    if (!exceptionMessage.empty())
        sMsg += m_sThisErrorOccurred + exceptionMessage + "\n";

    sMsg += m_sNoInstall + "\n";

    m_xMle_info->set_text(sMsg);
}

void UpdateInstallDialog::setError(std::u16string_view exceptionMessage)
{
    m_bError = true;
    m_xMle_info->set_text(m_xMle_info->get_text() + exceptionMessage + "\n");
}

IMPL_LINK_NOARG(UpdateInstallDialog, cancelHandler, weld::Button&, void)
{
    m_xDialog->response(RET_CANCEL);
}

void UpdateInstallDialog::Thread::downloadExtensions()
{
    try
    {
        //create the download directory in the temp folder
        OUString sTempDir;
        if (::osl::FileBase::getTempDirURL(sTempDir) != ::osl::FileBase::E_None)
            throw css::uno::Exception(u"Could not get URL for the temp directory. No extensions will be installed."_ustr, nullptr);

        //create a unique name for the directory
        OUString tempEntry, destFolder;
        if (::osl::File::createTempFile(&sTempDir, nullptr, &tempEntry ) != ::osl::File::E_None)
            throw css::uno::Exception("Could not create a temporary file in " + sTempDir +
             ". No extensions will be installed", nullptr );

        tempEntry = tempEntry.copy( tempEntry.lastIndexOf( '/' ) + 1 );

        destFolder = dp_misc::makeURL( sTempDir, tempEntry ) + "_";
        m_sDownloadFolder = destFolder;
        try
        {
            dp_misc::create_folder(nullptr, destFolder, m_updateCmdEnv );
        } catch (const css::uno::Exception & e)
        {
            css::uno::Any anyEx = cppu::getCaughtException();
            throw css::lang::WrappedTargetException( e.Message + " No extensions will be installed",
                            nullptr, anyEx );
        }


        sal_uInt16 count = 0;
        for (auto & updateData : m_aVecUpdateData)
        {
            if (!updateData.aUpdateInfo.is() || updateData.aUpdateSource.is())
                continue;
            //We assume that m_aVecUpdateData contains only information about extensions which
            //can be downloaded directly.
            OSL_ASSERT(updateData.sWebsiteURL.isEmpty());

            //update the name of the extension which is to be downloaded
            {
                SolarMutexGuard g;
                if (m_stop) {
                    return;
                }
                m_dialog.m_xFt_extension_name->set_label(updateData.aInstalledPackage->getDisplayName());
                sal_uInt16 prog = (sal::static_int_cast<sal_uInt16>(100) * ++count) /
                    sal::static_int_cast<sal_uInt16>(m_aVecUpdateData.size());
                m_dialog.m_xStatusbar->set_percentage(prog);
            }
            dp_misc::DescriptionInfoset info(m_xComponentContext, updateData.aUpdateInfo);
            //remember occurring exceptions in case we need to print out error information
            std::vector< std::pair<OUString, css::uno::Exception> > vecExceptions;
            css::uno::Sequence<OUString> seqDownloadURLs = info.getUpdateDownloadUrls();
            OSL_ENSURE(seqDownloadURLs.hasElements(), "No download URL provided!");
            for (sal_Int32 j = 0; j < seqDownloadURLs.getLength(); j++)
            {
                try
                {
                    OSL_ENSURE(!seqDownloadURLs[j].isEmpty(), "Download URL is empty!");
                    bool bCancelled = download(seqDownloadURLs[j], updateData);
                    if (bCancelled || !updateData.sLocalURL.isEmpty())
                        break;
                }
                catch ( css::uno::Exception & e )
                {
                    vecExceptions.emplace_back(seqDownloadURLs[j], e);
                    //There can be several different errors, for example, the URL is wrong, webserver cannot be reached,
                    //name cannot be resolved. The UCB helper API does not specify different special exceptions for these
                    //cases. Therefore ignore and continue.
                    continue;
                }
            }
            //update the progress and display download error
            {
                SolarMutexGuard g;
                if (m_stop) {
                    return;
                }
                if (updateData.sLocalURL.isEmpty())
                {
                    //Construct a string of all messages contained in the exceptions plus the respective download URLs
                    OUStringBuffer buf(256);
                    size_t nPos = 0;
                    for (auto const& elem : vecExceptions)
                    {
                        if (nPos)
                            buf.append("\n");
                        buf.append("Could not download " + elem.first + ". " + elem.second.Message);
                        ++nPos;
                    }
                    m_dialog.setError(UpdateInstallDialog::ERROR_DOWNLOAD, updateData.aInstalledPackage->getDisplayName(),
                        buf);
                }
            }

        }
    }
    catch (const css::uno::Exception & e)
    {
        SolarMutexGuard g;
        if (m_stop) {
            return;
        }
        m_dialog.setError(e.Message);
    }
}

void UpdateInstallDialog::Thread::installExtensions()
{
    //Update the fix text in the dialog to "Installing extensions..."
    {
        SolarMutexGuard g;
        if (m_stop) {
            return;
        }
        m_dialog.m_xFt_action->set_label(m_dialog.m_sInstalling);
        m_dialog.m_xStatusbar->set_percentage(0);
    }

    sal_uInt16 count = 0;
    for (auto const& updateData : m_aVecUpdateData)
    {
        //update the name of the extension which is to be installed
        {
            SolarMutexGuard g;
            if (m_stop) {
                return;
            }
            //we only show progress after an extension has been installed.
            if (count > 0) {
                m_dialog.m_xStatusbar->set_percentage(
                (sal::static_int_cast<sal_uInt16>(100) * count) /
                sal::static_int_cast<sal_uInt16>(m_aVecUpdateData.size()));
            }
            m_dialog.m_xFt_extension_name->set_label(updateData.aInstalledPackage->getDisplayName());
        }
        bool bError = false;
        bool bLicenseDeclined = false;
        css::uno::Reference<css::deployment::XPackage> xExtension;
        css::uno::Exception exc;
        try
        {
            css::uno::Reference< css::task::XAbortChannel > xAbortChannel(
                updateData.aInstalledPackage->createAbortChannel() );
            {
                SolarMutexGuard g;
                if (m_stop) {
                    return;
                }
                m_abort = xAbortChannel;
            }
            if (!updateData.aUpdateSource.is() && !updateData.sLocalURL.isEmpty())
            {
                css::beans::NamedValue prop(u"EXTENSION_UPDATE"_ustr, css::uno::Any(u"1"_ustr));
                if (!updateData.bIsShared)
                    xExtension = m_dialog.getExtensionManager()->addExtension(
                        updateData.sLocalURL, css::uno::Sequence<css::beans::NamedValue>(&prop, 1),
                        u"user"_ustr, xAbortChannel, m_updateCmdEnv);
                else
                    xExtension = m_dialog.getExtensionManager()->addExtension(
                        updateData.sLocalURL, css::uno::Sequence<css::beans::NamedValue>(&prop, 1),
                        u"shared"_ustr, xAbortChannel, m_updateCmdEnv);
            }
            else if (updateData.aUpdateSource.is())
            {
                OSL_ASSERT(updateData.aUpdateSource.is());
                //I am not sure if we should obtain the install properties and pass them into
                //add extension. Currently it contains only "SUPPRESS_LICENSE". So it could happen
                //that a license is displayed when updating from the shared repository, although the
                //shared extension was installed using "SUPPRESS_LICENSE".
                css::beans::NamedValue prop(u"EXTENSION_UPDATE"_ustr, css::uno::Any(u"1"_ustr));
                if (!updateData.bIsShared)
                    xExtension = m_dialog.getExtensionManager()->addExtension(
                        updateData.aUpdateSource->getURL(), css::uno::Sequence<css::beans::NamedValue>(&prop, 1),
                        u"user"_ustr, xAbortChannel, m_updateCmdEnv);
                else
                    xExtension = m_dialog.getExtensionManager()->addExtension(
                        updateData.aUpdateSource->getURL(), css::uno::Sequence<css::beans::NamedValue>(&prop, 1),
                        u"shared"_ustr, xAbortChannel, m_updateCmdEnv);
            }
        }
        catch (css::deployment::DeploymentException & de)
        {
            if (de.Cause.has<css::deployment::LicenseException>())
            {
                bLicenseDeclined = true;
            }
            else
            {
                exc = de.Cause.get<css::uno::Exception>();
                bError = true;
            }
        }
        catch (css::uno::Exception& e)
        {
            exc = e;
            bError = true;
        }

        if (bLicenseDeclined)
        {
            SolarMutexGuard g;
            if (m_stop) {
                return;
            }
            m_dialog.setError(UpdateInstallDialog::ERROR_LICENSE_DECLINED,
                updateData.aInstalledPackage->getDisplayName(), std::u16string_view());
        }
        else if (!xExtension.is() || bError)
        {
            SolarMutexGuard g;
            if (m_stop) {
                return;
            }
            m_dialog.setError(UpdateInstallDialog::ERROR_INSTALLATION,
                updateData.aInstalledPackage->getDisplayName(), exc.Message);
        }
        ++count;
    }
    {
        SolarMutexGuard g;
        if (m_stop) {
            return;
        }
        m_dialog.m_xStatusbar->set_percentage(100);
        m_dialog.m_xFt_extension_name->set_label(OUString());
        m_dialog.m_xFt_action->set_label(m_dialog.m_sFinished);
    }
}

void UpdateInstallDialog::Thread::removeTempDownloads()
{
    if (!m_sDownloadFolder.isEmpty())
    {
        dp_misc::erase_path(m_sDownloadFolder,
            css::uno::Reference<css::ucb::XCommandEnvironment>(),false /* no throw: ignore errors */ );
        //remove also the temp file which we have used to create the unique name
        OUString tempFile = m_sDownloadFolder.copy(0, m_sDownloadFolder.getLength() - 1);
        dp_misc::erase_path(tempFile, css::uno::Reference<css::ucb::XCommandEnvironment>(),false);
        m_sDownloadFolder.clear();
    }
}

bool UpdateInstallDialog::Thread::download(OUString const & sDownloadURL, UpdateData & aUpdateData)
{
    {
        SolarMutexGuard g;
        if (m_stop) {
            return m_stop;
        }
    }

    OSL_ASSERT(m_sDownloadFolder.getLength());
    OUString destFolder, tempEntry;
    if (::osl::File::createTempFile(
        &m_sDownloadFolder,
        nullptr, &tempEntry ) != ::osl::File::E_None)
    {
        //ToDo feedback in window that download of this component failed
        throw css::uno::Exception("Could not create temporary file in folder " + destFolder + ".", nullptr);
    }
    tempEntry = tempEntry.copy( tempEntry.lastIndexOf( '/' ) + 1 );

    destFolder = dp_misc::makeURL( m_sDownloadFolder, tempEntry ) + "_";

    ::ucbhelper::Content destFolderContent;
    dp_misc::create_folder( &destFolderContent, destFolder, m_updateCmdEnv );

    ::ucbhelper::Content sourceContent;
    (void)dp_misc::create_ucb_content(&sourceContent, sDownloadURL, m_updateCmdEnv);

    const OUString sTitle( StrTitle::getTitle( sourceContent ) );

    destFolderContent.transferContent(
            sourceContent, ::ucbhelper::InsertOperation::Copy,
            sTitle, css::ucb::NameClash::OVERWRITE );

    {
        //the user may have cancelled the dialog because downloading took too long
        SolarMutexGuard g;
        if (m_stop) {
            return m_stop;
        }
        //all errors should be handled by the command environment.
        aUpdateData.sLocalURL = destFolder + "/" + sTitle;
    }

    return m_stop;
}

UpdateCommandEnv::UpdateCommandEnv( css::uno::Reference< css::uno::XComponentContext > xCtx,
    ::rtl::Reference<UpdateInstallDialog::Thread> thread)
    : m_installThread(std::move(thread)),
    m_xContext(std::move(xCtx))
{
}

// XCommandEnvironment
css::uno::Reference<css::task::XInteractionHandler> UpdateCommandEnv::getInteractionHandler()
{
    return this;
}

css::uno::Reference<css::ucb::XProgressHandler> UpdateCommandEnv::getProgressHandler()
{
    return this;
}

// XInteractionHandler
void UpdateCommandEnv::handle(
    css::uno::Reference< css::task::XInteractionRequest> const & xRequest )
{
    css::uno::Any request( xRequest->getRequest() );
    OSL_ASSERT( request.getValueTypeClass() == css::uno::TypeClass_EXCEPTION );
    dp_misc::TRACE("[dp_gui_cmdenv.cxx] incoming request:\n"
        + ::comphelper::anyToString(request) + "\n\n");

    css::deployment::VersionException verExc;
    bool approve = false;

    if (request >>= verExc)
    {   //We must catch the version exception during the update,
        //because otherwise the user would be confronted with the dialogs, asking
        //them if they want to replace an already installed version of the same extension.
        //During an update we assume that we always want to replace the old version with the
        //new version.
        approve = true;
    }

    if (!approve)
    {
        //forward to interaction handler for main dialog.
        handleInteractionRequest( m_xContext, xRequest );
    }
    else
    {
        // select:
        for (auto& cont : xRequest->getContinuations())
        {
            css::uno::Reference< css::task::XInteractionApprove > xInteractionApprove(
                cont, css::uno::UNO_QUERY );
            if (xInteractionApprove.is()) {
                xInteractionApprove->select();
                // don't query again for ongoing continuations:
                break;
            }
        }
    }
}

// XProgressHandler
void UpdateCommandEnv::push( css::uno::Any const & /*Status*/ )
{
}

void UpdateCommandEnv::update( css::uno::Any const & /*Status */)
{
}

void UpdateCommandEnv::pop()
{
}


} //end namespace dp_gui

/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
