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/* main_welcome.cpp
 *
 * Wireshark - Network traffic analyzer
 * By Gerald Combs <gerald@wireshark.org>
 * Copyright 1998 Gerald Combs
 *
 * 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; either version 2
 * of the License, or (at your option) any later version.
 *
 * 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.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */

#include "config.h"

#include <glib.h>

#include <epan/prefs.h>

#include "ui/capture_globals.h"

#include "ws_version_info.h"

#include "main_welcome.h"
#include <ui_main_welcome.h>
#include "tango_colors.h"

#include "qt_ui_utils.h"
#include "wireshark_application.h"
#include "interface_tree.h"

#include <QClipboard>
#include <QDir>
#include <QListWidget>
#include <QMenu>
#include <QResizeEvent>
#include <QTreeWidgetItem>
#include <QWidget>

#if !defined(Q_OS_MAC) || QT_VERSION > QT_VERSION_CHECK(5, 0, 0)
#include <QGraphicsBlurEffect>
#endif

#ifndef VERSION_FLAVOR
#define VERSION_FLAVOR ""
#endif

#ifdef HAVE_EXTCAP
#include <extcap.h>
#endif

MainWelcome::MainWelcome(QWidget *parent) :
    QFrame(parent),
    welcome_ui_(new Ui::MainWelcome),
    splash_overlay_(NULL)

{
    welcome_ui_->setupUi(this);

    welcome_ui_->interfaceTree->resetColumnCount();

    recent_files_ = welcome_ui_->recentList;

    setStyleSheet(QString(
                      "MainWelcome {"
                      "  padding: 2em;"
                      " }"
                      "MainWelcome, QAbstractItemView {"
                      "  background-color: palette(base);"
                      "  color: palette(text);"
                      " }"
                      "QListWidget {"
                      "  border: 0;"
                      "}"
                      "QTreeWidget {"
                      "  border: 0;"
                      "}"
                      )
                );

    QString welcome_ss = QString(
                "QLabel {"
                "  border-radius: 0.33em;"
                "  color: #%1;"
                "  background-color: #%2;"
                "  padding: 0.33em;"
                "}"
                )
            .arg(tango_aluminium_6, 6, 16, QChar('0'))   // Text color
            .arg(tango_sky_blue_2, 6, 16, QChar('0'));   // Background color
    welcome_ui_->mainWelcomeBanner->setStyleSheet(welcome_ss);

    QString title_ss = QString(
                "QLabel {"
                "  color: #%1;"
                "}"
                )
            .arg(tango_aluminium_4, 6, 16, QChar('0'));   // Text color

    // XXX Is there a better term than "flavor"? Provider? Admonition (a la DocBook)?
    // Release_source?
    // Typical use cases are automated builds from wireshark.org and private,
    // not-for-redistribution packages.
    QString flavor = VERSION_FLAVOR;
    if (flavor.isEmpty()) {
        welcome_ui_->flavorBanner->hide();
    } else {
        // If needed there are a couple of ways we can make this customizable.
        // - Add one or more classes, e.g. "note" or "warning" similar to
        //   SyntaxLineEdit, which we can then expose vi #defines.
        // - Just expose direct color values via #defines.
        QString flavor_ss = QString(
                    "QLabel {"
                    "  border-radius: 0.25em;"
                    "  color: %1;"
                    "  background-color: %2;"
                    "  padding: 0.25em;"
                    "}"
                    )
                .arg("white") //   Text color
                .arg("#2c4bc4"); // Background color. Matches capture start button.
        //            .arg(tango_butter_5, 6, 16, QChar('0'));      // "Warning" background

        welcome_ui_->flavorBanner->setText(flavor);
        welcome_ui_->flavorBanner->setStyleSheet(flavor_ss);
    }
    welcome_ui_->captureLabel->setStyleSheet(title_ss);
    welcome_ui_->recentLabel->setStyleSheet(title_ss);
    welcome_ui_->helpLabel->setStyleSheet(title_ss);

#ifdef Q_OS_MAC
    recent_files_->setAttribute(Qt::WA_MacShowFocusRect, false);
    welcome_ui_->interfaceTree->setAttribute(Qt::WA_MacShowFocusRect, false);
#endif

    welcome_ui_->openFrame->hide();
    recent_files_->setStyleSheet(
            "QListWidget::item {"
            "  padding-top: 0.2em;"
            "  padding-bottom: 0.2em;"
            "}"
            "QListWidget::item::first {"
            "  padding-top: 0;"
            "}"
            "QListWidget::item::last {"
            "  padding-bottom: 0;"
            "}"
            );
    recent_files_->setTextElideMode(Qt::ElideLeft);

    recent_ctx_menu_ = new QMenu(this);
    welcome_ui_->recentList->setContextMenuPolicy(Qt::CustomContextMenu);
    connect(recent_files_, SIGNAL(customContextMenuRequested(QPoint)),
            this, SLOT(showRecentContextMenu(QPoint)));

    connect(wsApp, SIGNAL(updateRecentItemStatus(const QString &, qint64, bool)), this, SLOT(updateRecentFiles()));
    connect(wsApp, SIGNAL(appInitialized()), this, SLOT(appInitialized()));
    connect(welcome_ui_->interfaceTree, SIGNAL(itemDoubleClicked(QTreeWidgetItem*,int)),
            this, SLOT(interfaceDoubleClicked(QTreeWidgetItem*,int)));
#ifdef HAVE_EXTCAP
    connect(welcome_ui_->interfaceTree, SIGNAL(itemClicked(QTreeWidgetItem*,int)),
            this, SLOT(interfaceClicked(QTreeWidgetItem*,int)));
#endif
    connect(welcome_ui_->interfaceTree, SIGNAL(itemSelectionChanged()),
            welcome_ui_->captureFilterComboBox, SIGNAL(interfacesChanged()));
    connect(welcome_ui_->interfaceTree, SIGNAL(itemSelectionChanged()), this, SLOT(interfaceSelected()));
    connect(welcome_ui_->captureFilterComboBox->lineEdit(), SIGNAL(textEdited(QString)),
            this, SLOT(captureFilterTextEdited(QString)));
    connect(welcome_ui_->captureFilterComboBox, SIGNAL(pushFilterSyntaxStatus(const QString&)),
            this, SIGNAL(pushFilterSyntaxStatus(const QString&)));
    connect(welcome_ui_->captureFilterComboBox, SIGNAL(popFilterSyntaxStatus()),
            this, SIGNAL(popFilterSyntaxStatus()));
    connect(welcome_ui_->captureFilterComboBox, SIGNAL(captureFilterSyntaxChanged(bool)),
            this, SIGNAL(captureFilterSyntaxChanged(bool)));
    connect(welcome_ui_->captureFilterComboBox, SIGNAL(startCapture()),
            this, SIGNAL(startCapture()));
    connect(recent_files_, SIGNAL(itemActivated(QListWidgetItem *)), this, SLOT(openRecentItem(QListWidgetItem *)));
    updateRecentFiles();

#if !defined(Q_OS_MAC) || QT_VERSION > QT_VERSION_CHECK(5, 0, 0)
    // This crashes with Qt 4.8.3 on OS X.
    QGraphicsBlurEffect *blur = new QGraphicsBlurEffect(welcome_ui_->childContainer);
    blur->setBlurRadius(2);
    welcome_ui_->childContainer->setGraphicsEffect(blur);
#endif

    splash_overlay_ = new SplashOverlay(this);
}

MainWelcome::~MainWelcome()
{
    delete welcome_ui_;
}

InterfaceTree *MainWelcome::getInterfaceTree()
{
    return welcome_ui_->interfaceTree;
}

const QString MainWelcome::captureFilter()
{
    return welcome_ui_->captureFilterComboBox->currentText();
}

void MainWelcome::setCaptureFilter(const QString capture_filter)
{
    // capture_filter comes from the current filter in
    // CaptureInterfacesDialog. We need to find a good way to handle
    // multiple filters.
    welcome_ui_->captureFilterComboBox->lineEdit()->setText(capture_filter);
}

void MainWelcome::appInitialized()
{
    // XXX Add a "check for updates" link?
    QString full_release = tr("You are running Wireshark ");
    full_release += get_ws_vcs_version_info();
    full_release += tr(".");
#ifdef HAVE_SOFTWARE_UPDATE
    if (prefs.gui_update_enabled) {
        full_release += tr(" You receive automatic updates.");
    } else {
        full_release += tr(" You have disabled automatic updates.");
    }
#else
    // XXX Is there a way to tell if the user installed Wireshark via an
    // external package manager? If so we could say so here. We could
    // also add a link to the download page.
#endif
    welcome_ui_->fullReleaseLabel->setText(full_release);

#if !defined(Q_OS_MAC) || QT_VERSION > QT_VERSION_CHECK(5, 0, 0)
    welcome_ui_->childContainer->setGraphicsEffect(NULL);
#endif

#ifdef HAVE_LIBPCAP
    welcome_ui_->captureFilterComboBox->lineEdit()->setText(global_capture_opts.default_options.cfilter);
#endif // HAVE_LIBPCAP

    // Trigger interfacesUpdated.
    welcome_ui_->interfaceTree->selectedInterfaceChanged();

    delete splash_overlay_;
    splash_overlay_ = NULL;
}

// Update each selected device cfilter when the user changes the contents
// of the capture filter lineedit. We do so here so that we don't clobber
// filters set in the Capture Options / Interfaces dialog or ones set via
// the command line.
void MainWelcome::captureFilterTextEdited(const QString capture_filter)
{
    if (global_capture_opts.num_selected > 0) {
        interface_t device;

        for (guint i = 0; i < global_capture_opts.all_ifaces->len; i++) {
            device = g_array_index(global_capture_opts.all_ifaces, interface_t, i);
            if (!device.selected) {
                continue;
            }
            //                if (device.active_dlt == -1) {
            //                    simple_dialog(ESD_TYPE_ERROR, ESD_BTN_OK, "The link type of interface %s was not specified.", device.name);
            //                    continue;  /* Programming error: somehow managed to select an "unsupported" entry */
            //                }
            g_array_remove_index(global_capture_opts.all_ifaces, i);
            g_free(device.cfilter);
            if (capture_filter.isEmpty()) {
                device.cfilter = NULL;
            } else {
                device.cfilter = qstring_strdup(capture_filter);
            }
            g_array_insert_val(global_capture_opts.all_ifaces, i, device);
            //                update_filter_string(device.name, filter_text);
        }
    }
    welcome_ui_->interfaceTree->updateToolTips();
}

// The interface list selection has changed. At this point the user might
// have entered a filter or we might have pre-filled one from a number of
// sources such as our remote connection, the command line, or a previous
// selection.
// Must not change any interface data.
void MainWelcome::interfaceSelected()
{
    QPair <const QString, bool> sf_pair = CaptureFilterEdit::getSelectedFilter();
    const QString user_filter = sf_pair.first;
    bool conflict = sf_pair.second;

    if (conflict) {
        welcome_ui_->captureFilterComboBox->lineEdit()->clear();
        welcome_ui_->captureFilterComboBox->setConflict(true);
    } else {
        welcome_ui_->captureFilterComboBox->lineEdit()->setText(user_filter);
    }
}

void MainWelcome::interfaceDoubleClicked(QTreeWidgetItem *item, int)
{
    if (item) {
#ifdef HAVE_EXTCAP
        QString extcap_string = QVariant(item->data(IFTREE_COL_EXTCAP, Qt::UserRole)).toString();
        /* We trust the string here. If this interface is really extcap, the string is
         * being checked immediatly before the dialog is being generated */
        if (extcap_string.length() > 0) {
            QString device_name = QVariant(item->data(IFTREE_COL_NAME, Qt::UserRole)).toString();
            /* this checks if configuration is required and not yet provided or saved via prefs */
            if (extcap_has_configuration((const char *)(device_name.toStdString().c_str()), TRUE)) {
                emit showExtcapOptions(device_name);
                return;
            }
        }
#endif
        emit startCapture();
    }
}

#ifdef HAVE_EXTCAP
void MainWelcome::interfaceClicked(QTreeWidgetItem *item, int column)
{
    if (column == IFTREE_COL_EXTCAP) {
        QString extcap_string = QVariant(item->data(IFTREE_COL_EXTCAP, Qt::UserRole)).toString();
        /* We trust the string here. If this interface is really extcap, the string is
         * being checked immediatly before the dialog is being generated */
        if (extcap_string.length() > 0) {
            QString device_name = QVariant(item->data(IFTREE_COL_NAME, Qt::UserRole)).toString();
            emit showExtcapOptions(device_name);
        }
    }
}
#endif

void MainWelcome::updateRecentFiles() {
    QString itemLabel;
    QListWidgetItem *rfItem;
    QFont rfFont;
    QString selectedFilename;

    if (!recent_files_->selectedItems().isEmpty()) {
        rfItem = recent_files_->selectedItems().first();
        selectedFilename = rfItem->data(Qt::UserRole).toString();
    }

    int rfRow = 0;
    foreach (recent_item_status *ri, wsApp->recentItems()) {
        itemLabel = ri->filename;

        if (rfRow >= recent_files_->count()) {
            recent_files_->addItem(itemLabel);
        }

        itemLabel.append(" (");
        if (ri->accessible) {
            if (ri->size/1024/1024/1024 > 10) {
                itemLabel.append(QString("%1 GB").arg(ri->size/1024/1024/1024));
            } else if (ri->size/1024/1024 > 10) {
                itemLabel.append(QString("%1 MB").arg(ri->size/1024/1024));
            } else if (ri->size/1024 > 10) {
                itemLabel.append(QString("%1 KB").arg(ri->size/1024));
            } else {
                itemLabel.append(QString("%1 Bytes").arg(ri->size));
            }
        } else {
            itemLabel.append(tr("not found"));
        }
        itemLabel.append(")");
        rfFont.setItalic(!ri->accessible);
        rfItem = recent_files_->item(rfRow);
        rfItem->setText(itemLabel);
        rfItem->setData(Qt::UserRole, ri->filename);
        rfItem->setFlags(ri->accessible ? Qt::ItemIsSelectable | Qt::ItemIsEnabled : Qt::NoItemFlags);
        rfItem->setFont(rfFont);
        if (ri->filename == selectedFilename) {
            recent_files_->setItemSelected(rfItem, true);
        }
        rfRow++;
    }

    while ((unsigned)recent_files_->count() > prefs.gui_recent_files_count_max) {
        recent_files_->takeItem(recent_files_->count());
    }
    if (recent_files_->count() > 0) {
        welcome_ui_->openFrame->animatedShow();
    } else {
        welcome_ui_->openFrame->animatedHide();
    }
}

void MainWelcome::openRecentItem(QListWidgetItem *item) {
    QString cfPath = item->data(Qt::UserRole).toString();
    emit recentFileActivated(cfPath);
}

void MainWelcome::resizeEvent(QResizeEvent *event)
{
    if (splash_overlay_)
        splash_overlay_->resize(event->size());
//    event->accept();

    QFrame::resizeEvent(event);
}

void MainWelcome::setCaptureFilterText(const QString capture_filter)
{
    welcome_ui_->captureFilterComboBox->lineEdit()->setText(capture_filter);
    captureFilterTextEdited(capture_filter);
}

void MainWelcome::changeEvent(QEvent* event)
{
    if (0 != event)
    {
        switch (event->type())
        {
        case QEvent::LanguageChange:
            welcome_ui_->retranslateUi(this);
            break;
        default:
            break;
        }
    }
    QFrame::changeEvent(event);
}

#ifdef Q_OS_MAC
static const QString show_in_str_ = QObject::tr("Show in Finder");
#else
static const QString show_in_str_ = QObject::tr("Show in Folder");
#endif
void MainWelcome::showRecentContextMenu(QPoint pos)
{
    QListWidgetItem *li = recent_files_->itemAt(pos);
    if (!li) return;

    recent_ctx_menu_->clear();

    QString cf_path = li->data(Qt::UserRole).toString();
    QAction *show_action = recent_ctx_menu_->addAction(show_in_str_);

    show_action->setData(cf_path);
    connect(show_action, SIGNAL(triggered(bool)), this, SLOT(showRecentFolder()));

    QAction *copy_action = recent_ctx_menu_->addAction(tr("Copy file path"));
    copy_action->setData(cf_path);
    connect(copy_action, SIGNAL(triggered(bool)), this, SLOT(copyRecentPath()));

    recent_ctx_menu_->exec(recent_files_->mapToGlobal(pos));
}

void MainWelcome::showRecentFolder()
{
    QAction *ria = qobject_cast<QAction*>(sender());
    if (!ria) return;

    QString cf_path = ria->data().toString();
    desktop_show_in_folder(cf_path);
}

void MainWelcome::copyRecentPath()
{
    QAction *ria = qobject_cast<QAction*>(sender());
    if (!ria) return;

    QString cf_path = ria->data().toString();
    if (cf_path.isEmpty()) return;

    wsApp->clipboard()->setText(cf_path);
}

/*
 * Editor modelines
 *
 * Local Variables:
 * c-basic-offset: 4
 * tab-width: 8
 * indent-tabs-mode: nil
 * End:
 *
 * ex: set shiftwidth=4 tabstop=8 expandtab:
 * :indentSize=4:tabSize=8:noTabs=true:
 */