/*
 * Copyright (C) by Klaas Freitag <freitag@owncloud.com>
 *
 * 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 2 of the License.
 *
 * 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.
 */

#include "mirall/application.h"
#include "mirall/owncloudgui.h"
#include "mirall/theme.h"
#include "mirall/folderman.h"
#include "mirall/mirallconfigfile.h"
#include "mirall/utility.h"
#include "mirall/progressdispatcher.h"
#include "mirall/owncloudsetupwizard.h"
#if defined(Q_OS_MAC)
#    include "mirall/settingsdialogmac.h"
#    include "macwindow.h" // qtmacgoodies
#else
#    include "mirall/settingsdialog.h"
#endif
#include "mirall/logger.h"
#include "mirall/logbrowser.h"
#include "mirall/account.h"
#include "openfilemanager.h"
#include "creds/abstractcredentials.h"

#include <QDesktopServices>
#include <QMessageBox>
#include <QSignalMapper>

#if defined(Q_OS_X11)
#include <QX11Info>
#endif

namespace Mirall {

ownCloudGui::ownCloudGui(Application *parent) :
    QObject(parent),
    _tray(0),
#if defined(Q_OS_MAC)
    _settingsDialog(new SettingsDialogMac(this)),
#else
    _settingsDialog(new SettingsDialog(this)),
#endif
    _logBrowser(0),
    _recentActionsMenu(0),
    _folderOpenActionMapper(new QSignalMapper(this)),
    _recentItemsMapper(new QSignalMapper(this)),
    _app(parent)
{
    _tray = new Systray();
    _tray->setParent(this);

    // for the beginning, set the offline icon until the account was verified
    _tray->setIcon( Theme::instance()->folderOfflineIcon(true));

    connect(_tray.data(), SIGNAL(activated(QSystemTrayIcon::ActivationReason)),
            SLOT(slotTrayClicked(QSystemTrayIcon::ActivationReason)));

    setupActions();
    setupContextMenu();

    _tray->show();

    /* use a signal mapper to map the open requests to the alias names */
    connect(_folderOpenActionMapper, SIGNAL(mapped(QString)),
            this, SLOT(slotFolderOpenAction(QString)));

    connect(_recentItemsMapper, SIGNAL(mapped(QString)),
            this, SLOT(slotOpenPath(QString)));

    ProgressDispatcher *pd = ProgressDispatcher::instance();
    connect( pd, SIGNAL(progressInfo(QString,Progress::Info)), this,
             SLOT(slotUpdateProgress(QString,Progress::Info)) );

    FolderMan *folderMan = FolderMan::instance();
    connect( folderMan, SIGNAL(folderSyncStateChange(QString)),
             this,SLOT(slotSyncStateChange(QString)));

    connect( Logger::instance(), SIGNAL(guiLog(QString,QString)),
             SLOT(slotShowTrayMessage(QString,QString)));
    connect( Logger::instance(), SIGNAL(optionalGuiLog(QString,QString)),
             SLOT(slotShowOptionalTrayMessage(QString,QString)));
    connect( Logger::instance(), SIGNAL(guiMessage(QString,QString)),
             SLOT(slotShowGuiMessage(QString,QString)));

    setupOverlayIcons();
}

// Use this to do platform specific code to make overlay icons appear
// in the gui
// MacOSX: perform a AppleScript code peace to load the Finder Plugin.


void ownCloudGui::setupOverlayIcons()
{
#ifdef Q_OS_MAC
    const QLatin1String finderExtension("/Library/ScriptingAdditions/SyncStateFinder.osax");
    if(QFile::exists(finderExtension) ) {
        QString aScript = QString::fromUtf8("tell application \"Finder\"\n"
                                            "  try\n"
                                            "    «event OWNCload»\n"
                                            "  end try\n"
                                            "end tell\n");

          QString osascript = "/usr/bin/osascript";
          QStringList processArguments;
          // processArguments << "-l" << "AppleScript";

          QProcess p;
          p.start(osascript, processArguments);
          p.write(aScript.toUtf8());
          p.closeWriteChannel();
          p.waitForReadyRead(-1);
          QByteArray result = p.readAll();
          QString resultAsString(result); // if appropriate
          qDebug() << "Laod Finder Overlay-Plugin: " << resultAsString << ": " << p.exitCode()
                   << (p.exitCode() != 0 ? p.errorString() : QString::null);
    } else  {
        qDebug() << finderExtension << "does not exist! Finder Overlay Plugin loading failed";
    }
#endif
}

// This should rather be in application.... or rather in MirallConfigFile?
void ownCloudGui::slotOpenSettingsDialog( bool openSettings )
{
    // if account is set up, start the configuration wizard.
    if( AccountManager::instance()->account() ) {
        if( openSettings ) {
            if (_settingsDialog.isNull() || !_settingsDialog->isVisible()) {
                slotShowSettings();
            } else {
                _settingsDialog->close();
            }
        }
    } else {
        qDebug() << "No configured folders yet, starting setup wizard";
        OwncloudSetupWizard::runWizard(qApp, SLOT(slotownCloudWizardDone(int)));
    }
}

void ownCloudGui::slotTrayClicked( QSystemTrayIcon::ActivationReason reason )
{
    // A click on the tray icon should only open the status window on Win and
    // Linux, not on Mac. They want a menu entry.
#if !defined Q_OS_MAC
    if( reason == QSystemTrayIcon::Trigger ) {
        slotOpenSettingsDialog(true); // start settings if config is existing.
    }
#else
    // On Mac, if the settings dialog is already visible but hidden
    // by other applications, this will bring it to the front.
    if( reason == QSystemTrayIcon::Trigger ) {
        if (!_settingsDialog.isNull() && _settingsDialog->isVisible()) {
            slotShowSettings();
        }
    }
#endif
}

void ownCloudGui::slotSyncStateChange( const QString& alias )
{
    FolderMan *folderMan = FolderMan::instance();
    const SyncResult& result = folderMan->syncResult( alias );

    slotComputeOverallSyncStatus();

    if( alias.isEmpty() ) {
        return; // Valid, just a general GUI redraw was needed.
    }

    qDebug() << "Sync state changed for folder " << alias << ": "  << result.statusString();

    if (result.status() == SyncResult::Success || result.status() == SyncResult::Error) {
        Logger::instance()->enterNextLogFile();
    }
}

void ownCloudGui::slotFoldersChanged()
{
    slotComputeOverallSyncStatus();
    setupContextMenu();
}

void ownCloudGui::slotOpenPath(const QString &path)
{
    showInFileManager(path);
}

void ownCloudGui::slotAccountStateChanged()
{
    setupContextMenu();
    slotComputeOverallSyncStatus();
}

void ownCloudGui::startupConnected( bool connected, const QStringList& fails )
{
    FolderMan *folderMan = FolderMan::instance();

    if( connected ) {
        qDebug() << "######## connected to ownCloud Server!";
        folderMan->setSyncEnabled(true);
        // _tray->setIcon( Theme::instance()->syncStateIcon( SyncResult::NotYetStarted, true ) );
        // _tray->show();
    }

    _startupFails = fails; // store that for the settings dialog once it appears.
    if( !_settingsDialog.isNull() ) {
        _settingsDialog->setGeneralErrors( _startupFails );
    }

    slotComputeOverallSyncStatus();
}

void ownCloudGui::slotComputeOverallSyncStatus()
{
    if (Account *a = AccountManager::instance()->account()) {
        if (a->state() == Account::SignedOut) {
            _tray->setIcon(Theme::instance()->folderOfflineIcon(true));
            _tray->setToolTip(tr("Please sign in"));
            return;
        }
        if (a->state() == Account::Disconnected) {
            _tray->setIcon(Theme::instance()->folderOfflineIcon(true));
            _tray->setToolTip(tr("Disconnected from server"));
            return;
        }
    }
    // display the info of the least successful sync (eg. not just display the result of the latest sync
    QString trayMessage;
    FolderMan *folderMan = FolderMan::instance();
    Folder::Map map = folderMan->map();
    SyncResult overallResult = FolderMan::accountStatus(map.values());

    // if there have been startup problems, show an error message.
    if( !_settingsDialog.isNull() )
        _settingsDialog->setGeneralErrors( _startupFails );

    if( !_startupFails.isEmpty() ) {
        trayMessage = _startupFails.join(QLatin1String("\n"));
        QIcon statusIcon;
        if (_app->_startupNetworkError) {
            statusIcon = Theme::instance()->syncStateIcon( SyncResult::NotYetStarted, true );
        } else {
            statusIcon = Theme::instance()->syncStateIcon( SyncResult::Error, true );
        }

        _tray->setIcon( statusIcon );
        _tray->setToolTip(trayMessage);
    } else {
        // create the tray blob message, check if we have an defined state
        if( overallResult.status() != SyncResult::Undefined ) {
            QStringList allStatusStrings;
            if( map.count() > 0 ) {
                foreach(Folder* folder, map.values()) {
                    qDebug() << "Folder in overallStatus Message: " << folder << " with name " << folder->alias();
                    QString folderMessage = folderMan->statusToString(folder->syncResult().status(), folder->syncPaused());
                    allStatusStrings += tr("Folder %1: %2").arg(folder->alias(), folderMessage);
                }

                trayMessage = allStatusStrings.join(QLatin1String("\n"));
            } else {
                trayMessage = tr("No sync folders configured.");
            }

            QIcon statusIcon = Theme::instance()->syncStateIcon( overallResult.status(), true);
            _tray->setIcon( statusIcon );
            _tray->setToolTip(trayMessage);
        } else {
            // undefined because there are no folders.
            QIcon icon = Theme::instance()->syncStateIcon(SyncResult::Problem);
            _tray->setIcon( icon );
            _tray->setToolTip(tr("There are no sync folders configured."));
#if !defined Q_OS_MAC
            if( _settingsDialog ) {
                _settingsDialog->slotUpdateAccountIcon(icon);
            }
#endif
        }
    }
}

void ownCloudGui::setupContextMenu()
{
    FolderMan *folderMan = FolderMan::instance();

    Account *a = AccountManager::instance()->account();

    bool isConfigured = (a != 0);
    _actionOpenoC->setEnabled(isConfigured);
    bool isConnected = false;
    if (isConfigured) {
        isConnected = (a->state() == Account::Connected);
    }

    if ( _contextMenu ) {
        _contextMenu->clear();
        _recentActionsMenu->clear();
        _recentActionsMenu->addAction(tr("None."));
        _recentActionsMenu->addAction(_actionRecent);
    } else {
        _contextMenu.reset(new QMenu());
        _recentActionsMenu = new QMenu(tr("Recent Changes"), _contextMenu.data());
        // this must be called only once after creating the context menu, or
        // it will trigger a bug in Ubuntu's SNI bridge patch (11.10, 12.04).
        _tray->setContextMenu(_contextMenu.data());
    }
    _contextMenu->setTitle(Theme::instance()->appNameGUI() );
    _contextMenu->addAction(_actionOpenoC);

    int folderCnt = folderMan->map().size();
    // add open actions for all sync folders to the tray menu
    if( Theme::instance()->singleSyncFolder() ) {
        // there should be exactly one folder. No sync-folder add action will be shown.
        QStringList li = folderMan->map().keys();
        if( li.size() == 1 ) {
            Folder *folder = folderMan->map().value(li.first());
            if( folder ) {
                // if there is singleFolder mode, a generic open action is displayed.
                QAction *action = new QAction( tr("Open %1 folder").arg(Theme::instance()->appNameGUI()), this);
                connect( action, SIGNAL(triggered()),_folderOpenActionMapper,SLOT(map()));
                _folderOpenActionMapper->setMapping( action, folder->alias() );

                _contextMenu->addAction(action);
            }
        }
    } else {
        // show a grouping with more than one folder.
        if ( folderCnt > 1) {
            _contextMenu->addAction(tr("Managed Folders:"))->setDisabled(true);
        }
        foreach (Folder *folder, folderMan->map() ) {
            QAction *action = new QAction( tr("Open folder '%1'").arg(folder->alias()), this );
            connect( action, SIGNAL(triggered()),_folderOpenActionMapper,SLOT(map()));
            _folderOpenActionMapper->setMapping( action, folder->alias() );

            _contextMenu->addAction(action);
        }
    }
    _contextMenu->addSeparator();

    if (isConfigured && isConnected) {
        _contextMenu->addAction(_actionQuota);
        _contextMenu->addSeparator();
        _contextMenu->addAction(_actionStatus);
        _contextMenu->addMenu(_recentActionsMenu);
        _contextMenu->addSeparator();
    }
    _contextMenu->addAction(_actionSettings);
    if (!Theme::instance()->helpUrl().isEmpty()) {
        _contextMenu->addAction(_actionHelp);
    }
    _contextMenu->addSeparator();
    if (isConfigured && isConnected) {
        _contextMenu->addAction(_actionLogout);
    } else {
        _contextMenu->addAction(_actionLogin);
    }
    _contextMenu->addAction(_actionQuit);
}


void ownCloudGui::slotShowTrayMessage(const QString &title, const QString &msg)
{
    if( _tray )
        _tray->showMessage(title, msg);
    else
        qDebug() << "Tray not ready: " << msg;
}

void ownCloudGui::slotShowOptionalTrayMessage(const QString &title, const QString &msg)
{
    MirallConfigFile cfg;
    if (cfg.optionalDesktopNotifications()) {
        slotShowTrayMessage(title, msg);
    }
}


/*
 * open the folder with the given Alais
 */
void ownCloudGui::slotFolderOpenAction( const QString& alias )
{
    Folder *f = FolderMan::instance()->folder(alias);
    if( f ) {
        qDebug() << "opening local url " << f->path();
        QUrl url = QUrl::fromLocalFile(f->path());

#ifdef Q_OS_WIN
        // work around a bug in QDesktopServices on Win32, see i-net
        QString filePath = f->path();

        if (filePath.startsWith(QLatin1String("\\\\")) || filePath.startsWith(QLatin1String("//")))
            url.setUrl(QDir::toNativeSeparators(filePath));
        else
            url = QUrl::fromLocalFile(filePath);
#endif
        QDesktopServices::openUrl(url);
    }
}

void ownCloudGui::setupActions()
{
    _actionOpenoC = new QAction(tr("Open %1 in browser").arg(Theme::instance()->appNameGUI()), this);
    QObject::connect(_actionOpenoC, SIGNAL(triggered(bool)), SLOT(slotOpenOwnCloud()));
    _actionQuota = new QAction(tr("Calculating quota..."), this);
    _actionQuota->setEnabled( false );
    _actionStatus = new QAction(tr("Unknown status"), this);
    _actionStatus->setEnabled( false );
    _actionSettings = new QAction(tr("Settings..."), this);
    _actionRecent = new QAction(tr("Details..."), this);
    _actionRecent->setEnabled( true );

    QObject::connect(_actionRecent, SIGNAL(triggered(bool)), SLOT(slotShowSyncProtocol()));
    QObject::connect(_actionSettings, SIGNAL(triggered(bool)), SLOT(slotShowSettings()));
    _actionHelp = new QAction(tr("Help"), this);
    QObject::connect(_actionHelp, SIGNAL(triggered(bool)), SLOT(slotHelp()));
    _actionQuit = new QAction(tr("Quit %1").arg(Theme::instance()->appNameGUI()), this);
    QObject::connect(_actionQuit, SIGNAL(triggered(bool)), _app, SLOT(quit()));

    _actionLogin = new QAction(tr("Sign in..."), this);
    connect(_actionLogin, SIGNAL(triggered()), _app, SLOT(slotLogin()));
    _actionLogout = new QAction(tr("Sign out"), this);
    connect(_actionLogout, SIGNAL(triggered()), _app, SLOT(slotLogout()));

}

void ownCloudGui::slotRefreshQuotaDisplay( qint64 total, qint64 used )
{
    if (total == 0) {
        _actionQuota->setText(tr("Quota n/a"));
        return;
    }

    double percent = used/(double)total*100;
    QString percentFormatted = Utility::compactFormatDouble(percent, 1);
    QString totalFormatted = Utility::octetsToString(total);
    _actionQuota->setText(tr("%1% of %2 in use").arg(percentFormatted).arg(totalFormatted));
}

void ownCloudGui::slotRebuildRecentMenus()
{
    _recentActionsMenu->clear();
    if (!_recentItemsActions.isEmpty()) {
        foreach(QAction *a, _recentItemsActions) {
            _recentActionsMenu->addAction(a);
        }
        _recentActionsMenu->addSeparator();
    } else {
        _recentActionsMenu->addAction(tr("No items synced recently"))->setEnabled(false);
    }
    // add a more... entry.
    _recentActionsMenu->addAction(_actionRecent);
}


void ownCloudGui::slotUpdateProgress(const QString &folder, const Progress::Info& progress)
{
    Q_UNUSED(folder);

     if (!progress._currentDiscoveredFolder.isEmpty()) {
                 _actionStatus->setText( tr("Discovering '%1'")
                     .arg( progress._currentDiscoveredFolder ));
     } else if (progress._totalSize == 0 ) {
            quint64 currentFile =  progress._completedFileCount + progress._currentItems.count();           
            _actionStatus->setText( tr("Syncing %1 of %2  (%3 left)")
                .arg( currentFile ).arg( progress._totalFileCount )
                 .arg( Utility::timeToDescriptiveString(progress.totalEstimate().getEtaEstimate(), 2, " ",true) ) );
        } else {
         QString totalSizeStr = Utility::octetsToString( progress._totalSize );
            _actionStatus->setText( tr("Syncing %1 (%2 left)")
                .arg( totalSizeStr )
                .arg( Utility::timeToDescriptiveString(progress.totalEstimate().getEtaEstimate(), 2, " ",true) ) );
        }




    _actionRecent->setIcon( QIcon() ); // Fixme: Set a "in-progress"-item eventually.

    if (!progress._lastCompletedItem.isEmpty()) {

        if (Progress::isWarningKind(progress._lastCompletedItem._status)) {
            // display a warn icon if warnings happend.
            QIcon warnIcon(":/mirall/resources/warning-16");
            _actionRecent->setIcon(warnIcon);
        }

        QString kindStr = Progress::asResultString(progress._lastCompletedItem);
        QString timeStr = QTime::currentTime().toString("hh:mm");
        QString actionText = tr("%1 (%2, %3)").arg(progress._lastCompletedItem._file, kindStr, timeStr);
        QAction *action = new QAction(actionText, this);
        Folder *f = FolderMan::instance()->folder(folder);
        if (f) {
            QString fullPath = f->path() + '/' + progress._lastCompletedItem._file;
            if (QFile(fullPath).exists()) {
                _recentItemsMapper->setMapping(action, fullPath);
                connect(action, SIGNAL(triggered()), _recentItemsMapper, SLOT(map()));
            } else {
                action->setEnabled(false);
            }
        }
        if (_recentItemsActions.length() > 5) {
            _recentItemsActions.takeFirst()->deleteLater();
        }
        _recentItemsActions.append(action);

        slotRebuildRecentMenus();
    }

    if (progress._completedFileCount == progress._totalFileCount
            && progress._currentDiscoveredFolder.isEmpty()) {
        QTimer::singleShot(2000, this, SLOT(slotDisplayIdle()));
    }
}

void ownCloudGui::slotDisplayIdle()
{
    _actionStatus->setText(tr("Up to date"));
}

void ownCloudGui::slotShowGuiMessage(const QString &title, const QString &message)
{
    QMessageBox *msgBox = new QMessageBox;
    msgBox->setAttribute(Qt::WA_DeleteOnClose);
    msgBox->setText(message);
    msgBox->setWindowTitle(title);
    msgBox->setIcon(QMessageBox::Information);
    msgBox->open();
}

void ownCloudGui::slotShowSettings()
{
    qDebug() << Q_FUNC_INFO;
    if (_settingsDialog.isNull()) {
        _settingsDialog =
#if defined(Q_OS_MAC)
                new SettingsDialogMac(this);
#else
                new SettingsDialog(this);
#endif
        _settingsDialog->setAttribute( Qt::WA_DeleteOnClose, true );
        _settingsDialog->show();
    }
    _settingsDialog->setGeneralErrors( _startupFails );
    raiseDialog(_settingsDialog.data());
}

void ownCloudGui::slotShowSyncProtocol()
{
    slotShowSettings();
    _settingsDialog->showActivityPage();
}


void ownCloudGui::slotShutdown()
{
    // those do delete on close
    if (!_settingsDialog.isNull()) _settingsDialog->close();
    if (!_logBrowser.isNull())     _logBrowser->deleteLater();
}

void ownCloudGui::slotToggleLogBrowser()
{
    if (_logBrowser.isNull()) {
        // init the log browser.
        _logBrowser = new LogBrowser;
        // ## TODO: allow new log name maybe?
    }

    if (_logBrowser->isVisible() ) {
        _logBrowser->hide();
    } else {
        raiseDialog(_logBrowser);
    }
}

void ownCloudGui::slotOpenOwnCloud()
{
    if (Account *account = AccountManager::instance()->account()) {
        QDesktopServices::openUrl(account->url());
    }
}

void ownCloudGui::slotHelp()
{
    QDesktopServices::openUrl(QUrl(Theme::instance()->helpUrl()));
}

void ownCloudGui::raiseDialog( QWidget *raiseWidget )
{
    if( raiseWidget && raiseWidget->parentWidget() == 0) {
        // Qt has a bug which causes parent-less dialogs to pop-under.
        raiseWidget->showNormal();
        raiseWidget->raise();
        raiseWidget->activateWindow();

#if defined(Q_OS_MAC)
        // viel hilft viel ;-)
        MacWindow::bringToFront(raiseWidget);
#endif
#if defined(Q_OS_X11)
        WId wid = widget->winId();
        NETWM::init();

        XEvent e;
        e.xclient.type = ClientMessage;
        e.xclient.message_type = NETWM::NET_ACTIVE_WINDOW;
        e.xclient.display = QX11Info::display();
        e.xclient.window = wid;
        e.xclient.format = 32;
        e.xclient.data.l[0] = 2;
        e.xclient.data.l[1] = QX11Info::appTime();
        e.xclient.data.l[2] = 0;
        e.xclient.data.l[3] = 0l;
        e.xclient.data.l[4] = 0l;
        Display *display = QX11Info::display();
        XSendEvent(display,
                   RootWindow(display, DefaultScreen(display)),
                   False, // propagate
                   SubstructureRedirectMask|SubstructureNotifyMask,
                   &e);
#endif
    }
}


} // end namespace