/* Copyright (C) 2017
 * swift project Community / Contributors
 *
 * This file is part of swift Project. It is subject to the license terms in the LICENSE file found in the top-level
 * directory of this distribution and at http://www.swift-project.org/license.html. No part of swift project,
 * including this file, may be copied, modified, propagated, or distributed except according to the terms
 * contained in the LICENSE file.
 */

#include "installxswiftbuscomponent.h"
#include "ui_installxswiftbuscomponent.h"
#include "blackgui/guiapplication.h"
#include "blackgui/overlaymessagesframe.h"
#include "blackmisc/simulation/xplane/xplaneutil.h"
#include "blackmisc/compressutils.h"
#include "blackmisc/logmessage.h"
#include "blackmisc/directoryutils.h"
#include "blackmisc/fileutils.h"

#include <QMessageBox>
#include <QFileDialog>
#include <QDir>
#include <QFileInfo>
#include <QStandardPaths>
#include <QTimer>
#include <QDesktopServices>

using namespace BlackMisc;
using namespace BlackMisc::Db;
using namespace BlackMisc::Network;
using namespace BlackMisc::Simulation;
using namespace BlackMisc::Simulation::Settings;
using namespace BlackMisc::Simulation::XPlane;

namespace BlackGui
{
    namespace Components
    {
        CInstallXSwiftBusComponent::CInstallXSwiftBusComponent(QWidget *parent) :
            COverlayMessagesFrame(parent),
            CLoadIndicatorEnabled(this),
            ui(new Ui::CInstallXSwiftBusComponent)
        {
            ui->setupUi(this);

            ui->le_XSwiftBusPluginDir->setText(this->getXPlanePluginDirectory());
            ui->le_DownloadDir->setText(QStandardPaths::writableLocation(QStandardPaths::DownloadLocation));
            ui->cb_DownloadFile->setEnabled(false);

            connect(ui->tb_DialogInstallDir, &QPushButton::pressed, this, &CInstallXSwiftBusComponent::selectPluginDirectory);
            connect(ui->tb_DialogDownloadDir, &QPushButton::pressed, this, &CInstallXSwiftBusComponent::selectDownloadDirectory);
            connect(ui->pb_Download, &QPushButton::pressed, this, &CInstallXSwiftBusComponent::triggerDownloadingOfXSwiftBusFile);
            connect(ui->pb_OpenDownloadDir, &QPushButton::pressed, this, &CInstallXSwiftBusComponent::openDownloadDir);
            connect(ui->pb_OpenInstallDir, &QPushButton::pressed, this, &CInstallXSwiftBusComponent::openInstallDir);

            // init upate info
            this->updatesChanged();
        }

        CInstallXSwiftBusComponent::~CInstallXSwiftBusComponent()
        { }

        void CInstallXSwiftBusComponent::setDefaultDownloadName(const QString &defaultDownload)
        {
            m_defaultDownloadName = defaultDownload;
        }

        void CInstallXSwiftBusComponent::selectPluginDirectory()
        {
            QString xPlanePluginDir = CFileUtils::fixWindowsUncPath(ui->le_XSwiftBusPluginDir->text().trimmed());
            xPlanePluginDir = QFileDialog::getExistingDirectory(parentWidget(),
                              tr("Choose your X-Plane plugin directory"), xPlanePluginDir, m_fileDialogOptions);

            if (xPlanePluginDir.isEmpty()) { return; } // canceled
            if (!QDir(xPlanePluginDir).exists())
            {
                const CStatusMessage msg = CStatusMessage(this, CLogCategory::validation()).warning("'%1' is not a valid X-Plane plugin directory") << xPlanePluginDir;
                this->showOverlayMessage(msg, CInstallXSwiftBusComponent::OverlayMsgTimeoutMs);
                return;
            }
            ui->le_XSwiftBusPluginDir->setText(xPlanePluginDir);
        }

        void CInstallXSwiftBusComponent::selectDownloadDirectory()
        {
            QString downloadDir = CFileUtils::fixWindowsUncPath(ui->le_DownloadDir->text().trimmed());
            downloadDir = QFileDialog::getExistingDirectory(parentWidget(),
                          tr("Choose your X-Plane plugin directory"), downloadDir, m_fileDialogOptions);

            if (downloadDir.isEmpty()) { return; } // canceled
            if (!QDir(downloadDir).exists())
            {
                const CStatusMessage msg = CStatusMessage(this, CLogCategory::validation()).warning("'%1' is not a valid download directory") << downloadDir;
                this->showOverlayMessage(msg, CInstallXSwiftBusComponent::OverlayMsgTimeoutMs);
                return;
            }
            ui->le_DownloadDir->setText(downloadDir);
        }

        void CInstallXSwiftBusComponent::installXSwiftBus()
        {
            const CRemoteFile rf = this->getRemoteFileSelected();
            const QString downloadFileName = CFileUtils::appendFilePathsAndFixUnc(this->downloadDir(), rf.getName());
            QFile downloadFile(downloadFileName);
            if (!downloadFile.exists())
            {
                const CStatusMessage msg = CStatusMessage(this, CLogCategory::validation()).error("Cannot read downloaded file '%1'") << downloadFileName;
                this->showOverlayMessage(msg, CInstallXSwiftBusComponent::OverlayMsgTimeoutMs);
                return;
            }

            const QString xSwiftBusDirectory = this->xSwiftBusDir();
            if (xSwiftBusDirectory.isEmpty())
            {
                const CStatusMessage msg = CStatusMessage(this, CLogCategory::validation()).error("No directory to install to'");
                this->showOverlayMessage(msg, CInstallXSwiftBusComponent::OverlayMsgTimeoutMs);
                return;
            }

            const QDir installDir(xSwiftBusDirectory);
            if (!installDir.exists())
            {
                const CStatusMessage msg = CStatusMessage(this, CLogCategory::validation()).error("Directory '%1' does not exist") << xSwiftBusDirectory;
                this->showOverlayMessage(msg, CInstallXSwiftBusComponent::OverlayMsgTimeoutMs);
                return;
            }

            const QString destFileName = CFileUtils::appendFilePathsAndFixUnc(xSwiftBusDirectory, rf.getName());
            {
                QFile destFile(destFileName);
                if (destFile.exists())
                {
                    const bool removed = destFile.remove();
                    if (!removed)
                    {
                        const CStatusMessage msg = CStatusMessage(this, CLogCategory::validation()).error("Cannot remove '%1'") << destFileName;
                        this->showOverlayMessage(msg, CInstallXSwiftBusComponent::OverlayMsgTimeoutMs);
                        return;
                    }
                }
            }

            const bool copied = QFile::copy(downloadFileName, destFileName);
            if (!copied)
            {
                const CStatusMessage msg = CStatusMessage(this, CLogCategory::validation()).error("Cannot copy '%1' to '%2'") << downloadFileName << destFileName;
                this->showOverlayMessage(msg, CInstallXSwiftBusComponent::OverlayMsgTimeoutMs);
                return;
            }

            // we need to unzip the destination file
            const QFileInfo destFile(destFileName);
            if (!destFile.exists())
            {
                const CStatusMessage msg = CStatusMessage(this, CLogCategory::validation()).error("XSwiftBus file '%1' does not exist") << destFileName;
                this->showOverlayMessage(msg, CInstallXSwiftBusComponent::OverlayMsgTimeoutMs);
                return;
            }

            // if possible we will unzip
            QStringList stdOutAndError;
            if (CCompressUtils::zip7Uncompress(destFile.absoluteFilePath(), xSwiftBusDirectory, &stdOutAndError))
            {
                // capture values by copy!
                const CStatusMessage msg = CStatusMessage(this, CLogCategory::validation()).info("Uncompressed xSwiftBus in '%1'") << xSwiftBusDirectory;
                this->showOverlayMessagesWithConfirmation(msg, false, "Delete downloaded file?", [ = ]
                {
                    QFile downloadFile(downloadFileName);
                    if (!downloadFile.exists()) { return; } // removed in meantime
                    const bool removed = downloadFile.remove();
                    Q_UNUSED(removed);
                });
                return;
            }
            else
            {
                const CStatusMessage msg = CStatusMessage(this, CLogCategory::validation()).warning("Unzip failed: stdout '%1' stderr '%2'") << safeAt(stdOutAndError, 0) << safeAt(stdOutAndError, 1);
                this->showOverlayMessage(msg);
            }

            //! fixme Ref T253, once we have a zip library we will directly unzip
            const QMessageBox::StandardButton reply = QMessageBox::question(this,
                    "Install swiftXDBus",
                    "You need to manually unzip XSwiftBus into the plugins directory.\nIt needs to look like 'plugin/xswiftbus'.\n\nOpen the archive?",
                    QMessageBox::Yes | QMessageBox::No);

            if (reply == QMessageBox::Yes)
            {
                QDesktopServices::openUrl(QUrl::fromLocalFile(destFile.absoluteFilePath()));
            }
        }

        void CInstallXSwiftBusComponent::triggerDownloadingOfXSwiftBusFile()
        {
            if (!sGui || !sGui->hasWebDataServices() || sGui->isShuttingDown()) { return; }
            if (!this->existsDownloadDir())
            {
                const CStatusMessage msg = CStatusMessage(this, CLogCategory::validation()).error("Invalid download directory");
                this->showOverlayMessage(msg, CInstallXSwiftBusComponent::OverlayMsgTimeoutMs);
                return;
            }

            const CRemoteFile rf = this->getRemoteFileSelected();
            const CUrl download = rf.getSmartUrl();
            if (download.isEmpty())
            {
                const CStatusMessage msg = CStatusMessage(this, CLogCategory::validation()).error("No download URL for file name '%1'") << rf.getNameAndSize();
                this->showOverlayMessage(msg, CInstallXSwiftBusComponent::OverlayMsgTimeoutMs);
                return;
            }

            const QString saveAsFile = CFileUtils::appendFilePathsAndFixUnc(ui->le_DownloadDir->text(), rf.getName());
            const QFile saveFile(saveAsFile);
            if (saveFile.exists())
            {
                const QMessageBox::StandardButton reply = QMessageBox::question(this,
                        "The file already exists",
                        "Do you want to use the existing '" + saveAsFile + "'?",
                        QMessageBox::Yes | QMessageBox::No | QMessageBox::Cancel);
                if (reply == QMessageBox::Cancel) { return; }
                if (reply == QMessageBox::Yes)
                {
                    const CStatusMessage msg = CStatusMessage(this).info("Using existing file '%1'") << saveAsFile;
                    const QPointer<CInstallXSwiftBusComponent> guard(this);
                    QTimer::singleShot(100, this, [ = ]
                    {
                        if (guard.isNull()) { return; }
                        this->downloadedXSwiftBusFile(msg);
                    });
                    return;
                }
            }

            const QNetworkReply *r = sGui->downloadFromNetwork(download, saveAsFile, { this, &CInstallXSwiftBusComponent::downloadedXSwiftBusFile});
            if (r)
            {
                CLogMessage(this).info("Triggered downloading of XSwiftBus file from '%1'") << download.getHost();
                this->showLoading(120 * 1000); // timeout in any case
            }
            else
            {
                const CStatusMessage msg = CStatusMessage(this, CLogCategory::validation()).error("Starting download for '%1' failed") << download.getFullUrl();
                this->showOverlayMessage(msg, CInstallXSwiftBusComponent::OverlayMsgTimeoutMs);
            }
        }

        void CInstallXSwiftBusComponent::downloadedXSwiftBusFile(const CStatusMessage &status)
        {
            this->hideLoading();
            if (sGui && sGui->isShuttingDown()) { return; }
            if (status.isWarningOrAbove())
            {
                this->showOverlayMessage(status);
                return;
            }
            if (!this->existsXSwiftBusPluginDir())
            {
                const CStatusMessage msg = CStatusMessage(this).warning("No valid install directory, cannot continue.");
                this->showOverlayMessage(msg);
                return;
            }

            static const QString confirm("Install in '%1'?");
            this->showOverlayMessagesWithConfirmation(status, false, confirm.arg(ui->le_XSwiftBusPluginDir->text()), [ = ]
            {
                QTimer::singleShot(0, this, &CInstallXSwiftBusComponent::installXSwiftBus);
            });
        }

        CRemoteFile CInstallXSwiftBusComponent::getRemoteFileSelected() const
        {
            const QString fileNameAndSize = ui->cb_DownloadFile->currentText();
            const CUpdateInfo update = m_updates.get();
            const CRemoteFileList remoteFiles = update.getArtifactsXSwiftBus().asRemoteFiles();
            return remoteFiles.findFirstByMatchingNameOrDefault(fileNameAndSize);
        }

        QString CInstallXSwiftBusComponent::downloadDir() const
        {
            return CFileUtils::fixWindowsUncPath(ui->le_DownloadDir->text().trimmed());
        }

        QString CInstallXSwiftBusComponent::xSwiftBusDir() const
        {
            return CFileUtils::fixWindowsUncPath(ui->le_XSwiftBusPluginDir->text().trimmed());
        }

        bool CInstallXSwiftBusComponent::existsDownloadDir() const
        {
            const QDir dir(this->downloadDir());
            return dir.exists() && dir.isReadable();
        }

        bool CInstallXSwiftBusComponent::existsXSwiftBusPluginDir() const
        {
            const QDir dir(this->xSwiftBusDir());
            return dir.exists() && dir.isReadable();
        }

        QString CInstallXSwiftBusComponent::getXPlanePluginDirectory() const
        {
            const CXPlaneSimulatorSettings settings = m_simulatorSettings.getSettings(CSimulatorInfo::XPLANE);
            return settings.getPluginDirOrDefault();
        }

        void CInstallXSwiftBusComponent::updatesChanged()
        {
            const CUpdateInfo updateInfo = m_updates.get();
            if (updateInfo.getArtifactsXSwiftBus().isEmpty()) { return; }
            const CArtifactList artifacts = updateInfo.getArtifactsXSwiftBusLatestVersionFirst().findWithUnrestrictedDistributions();
            if (artifacts.isEmpty()) { return; }

            const CRemoteFileList remoteFiles = artifacts.asRemoteFiles();
            if (!remoteFiles.isEmpty())
            {
                const QStringList xSwiftBusFiles(remoteFiles.getNamesPlusSize(false));
                ui->cb_DownloadFile->addItems(xSwiftBusFiles);

                // current text
                QString current;
                if (!m_defaultDownloadName.isEmpty())
                {
                    const CRemoteFile rf = remoteFiles.findFirstByMatchingNameOrDefault(m_defaultDownloadName);
                    current = rf.getNameAndSize();
                }
                ui->cb_DownloadFile->setCurrentText(
                    current.isEmpty() ?
                    remoteFiles.frontOrDefault().getNameAndSize() :
                    current
                ); // latest version
            }
            ui->cb_DownloadFile->setEnabled(!remoteFiles.isEmpty());
        }

        void CInstallXSwiftBusComponent::openInstallDir()
        {
            if (!this->existsXSwiftBusPluginDir()) { return; }
            const QString file = CFileUtils::fixWindowsUncPath(ui->le_XSwiftBusPluginDir->text());
            QDesktopServices::openUrl(QUrl::fromLocalFile(file));
        }

        void CInstallXSwiftBusComponent::openDownloadDir()
        {
            if (!this->existsDownloadDir()) { return; }
            const QString file = CFileUtils::fixWindowsUncPath(ui->le_DownloadDir->text());
            QDesktopServices::openUrl(QUrl::fromLocalFile(file));
        }

        bool CInstallXSwiftBusWizardPage::validatePage()
        {
            return true;
        }
    } // ns
} // ns