/*
 * wbmanager.cpp - Whiteboard manager
 * Copyright (C) 2007  Joonas Govenius
 *
 * Influenced by:
 * pepmanager.cpp - Classes for PEP
 * Copyright (C) 2006  Remko Troncon
 *
 * 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 library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 */
 
#include "wbmanager.h"
#include "psipopup.h"
#include <QDebug>
#include <QMessageBox>

#define WBNS "http://www.w3.org/2000/svg"
#define EMPTYWB "<!DOCTYPE svg PUBLIC \"-//W3C//DTD SVG 1.1//EN\" \"http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd\"> <svg xmlns=\"http://www.w3.org/2000/svg\" version=\"1.2\" viewBox=\"0 0 600 400\" baseProfile=\"tiny\" />"

using namespace XMPP;

// -----------------------------------------------------------------------------

WbManager::WbManager(XMPP::Client* client, PsiAccount* pa, SxeManager* sxemanager) {
	pa_ = pa;
    sxemanager_ = sxemanager;

    client->addExtension("whiteboard", Features(WBNS));

    connect(sxemanager_, SIGNAL(sessionNegotiated(SxeSession*)), SLOT(createWbDlg(SxeSession*)));
    sxemanager_->addInvitationCallback(WbManager::checkInvitation);
}

void WbManager::openWhiteboard(const Jid &target, const Jid &ownJid, bool groupChat, bool promptInitialDoc) {
    
    // check that the target supports whiteboarding via SXE
    QList<QString> features;
    features += WBNS;
    if(!sxemanager_->checkSupport(target, features)) {
        QMessageBox::information(NULL, tr("Unsupported"), tr("The contact does not support whiteboarding."));
        return;
    }
    
    
	// See if we have a session for the JID
	WbDlg* w = findWbDlg(target);
	if(!w) {
	    // else negotiate a new session and return null
        
        QDomDocument doc;

        if(promptInitialDoc) {
            bool openExisting = (QMessageBox::Yes == QMessageBox::question(NULL,
                                                        tr("Open Existing SVG?"),
                                                        tr("Would you like to open an existing SVG document in the whitebaord?"),
                                                        QMessageBox::Yes | QMessageBox::No,
                                                        QMessageBox::No));
            
            if(openExisting) {
                // prompt for an existing file
                QString fileName = QFileDialog::getOpenFileName(NULL, tr("Initial SVG Document for the Whiteboard"),
                                                                 QDir::homePath(),
                                                                 tr("Scalable Vector Graphics (*.svg)"));

                QFile file(fileName);
                if(file.open(QIODevice::ReadOnly)) {
                    doc.setContent(file.readAll(), true);
                    file.close();
                }
            }
        }

        if(doc.documentElement().nodeName() != "svg") {

            // initialize with an empty whiteboarding document
            doc = QDomDocument();
            doc.setContent(QString(EMPTYWB), true);

        }


        // negotiate the session
		sxemanager_->startNewSession(target, ownJid, groupChat, doc, features);
	}
	else
		bringToFront(w);
}

void WbManager::removeDialog(WbDlg* dialog)
{
    dialogs_.takeAt(dialogs_.indexOf(dialog))->deleteLater();
}

WbDlg* WbManager::findWbDlg(const Jid &jid) {
	// find if a dialog for the jid already exists
	foreach(WbDlg* w, dialogs_) {
		// does the jid match?
		if(w->session()->target().compare(jid)) {
			return w;
		}
	}
	return 0;
}

void WbManager::createWbDlg(SxeSession* session) {
    // check if the session is a whiteboarding session
    bool whiteboarding = false;
    foreach(QString feature, session->features()) {
        if(feature == WBNS)
            whiteboarding = true;
    }

    if(whiteboarding) {
    	// create the WbDlg
    	WbDlg* w = new WbDlg(session, pa_);

    	// connect the signals
    	connect(w, SIGNAL(sessionEnded(WbDlg*)), SLOT(removeDialog(WbDlg*)));
    	connect(session, SIGNAL(peerLeftSession(Jid)), w, SLOT(peerLeftSession(Jid)));

        dialogs_.append(w);

        bringToFront(w);
    }
}

bool WbManager::checkInvitation(const Jid &peer, const QList<QString> &features) {
    if(!features.contains(WBNS))
        return false;

    return (QMessageBox::Yes == QMessageBox::question(NULL,
                                    tr("Whiteboarding Invitation?"),
                                    tr("%1 has invited you to a whiteboarding session. Would you like to join?").arg(peer.full()),
                                    QMessageBox::Yes | QMessageBox::No,
                                    QMessageBox::No));
}
