/****************************************************************
 *  RetroShare is distributed under the following license:
 *
 *  Copyright (C) 2006, crypton
 *
 *  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 <QFile>
#include <QFileInfo>
#include <QWidgetAction>
#include <QTimer>

#include "common/vmessagebox.h"
#include "common/StatusDefs.h"

#include <retroshare/rspeers.h>
#include <retroshare/rsmsgs.h>
#include <retroshare/rsstatus.h>
#include <retroshare/rsnotify.h>

#include "rshare.h"
#include "MessengerWindow.h"
#include "RsAutoUpdatePage.h"

#include "MainWindow.h"
#include "ShareManager.h"
#include "notifyqt.h"
#include "connect/ConnectFriendWizard.h"
#include "util/PixmapMerging.h"
#include "LogoBar.h"
#include "util/Widget.h"
#include "util/misc.h"
#include "settings/rsharesettings.h"

#include <iostream>
#include <algorithm>
#include <set>


/******
 * #define MSG_DEBUG 1
 *****/

MessengerWindow* MessengerWindow::_instance = NULL;
static std::set<std::string> *expandedPeers = NULL;
static std::set<std::string> *expandedGroups = NULL;

/*static*/ void MessengerWindow::showYourself ()
{
    if (_instance == NULL) {
        _instance = new MessengerWindow();
    }

    _instance->show();
    _instance->activateWindow();
}

MessengerWindow* MessengerWindow::getInstance()
{
    return _instance;
}

void MessengerWindow::releaseInstance()
{
    if (_instance) {
        delete _instance;
    }
    if (expandedPeers) {
        /* delete saved expanded peers */
        delete(expandedPeers);
        expandedPeers = NULL;
    }
    if (expandedGroups) {
        /* delete saved expanded groups */
        delete(expandedGroups);
        expandedGroups = NULL;
    }
}

/** Constructor */
MessengerWindow::MessengerWindow(QWidget* parent, Qt::WindowFlags flags)
    : 	RWindow("MessengerWindow", parent, flags)
{
    /* Invoke the Qt Designer generated object setup routine */
    ui.setupUi(this);

    setAttribute ( Qt::WA_DeleteOnClose, true );

    ui.avatar->setFrameType(AvatarWidget::STATUS_FRAME);
    ui.avatar->setOwnId();

    connect(ui.messagelineEdit, SIGNAL(textChanged(const QString &)), this, SLOT(savestatusmessage()));

    connect(NotifyQt::getInstance(), SIGNAL(ownAvatarChanged()), this, SLOT(updateAvatar()));
    connect(NotifyQt::getInstance(), SIGNAL(ownStatusMessageChanged()), this, SLOT(loadmystatusmessage()));
    connect(NotifyQt::getInstance(), SIGNAL(peerStatusChanged(QString,int)), this, SLOT(updateOwnStatus(QString,int)));

    if (expandedPeers != NULL) {
        for (std::set<std::string>::iterator peerIt = expandedPeers->begin(); peerIt != expandedPeers->end(); ++peerIt) {
            ui.friendList->addPeerToExpand(*peerIt);
        }
        delete expandedPeers;
        expandedPeers = NULL;
    }

    if (expandedGroups != NULL) {
        for (std::set<std::string>::iterator groupIt = expandedGroups->begin(); groupIt != expandedGroups->end(); ++groupIt) {
            ui.friendList->addGroupToExpand(*groupIt);
        }
        delete expandedGroups;
        expandedGroups = NULL;
    }

    ui.messagelineEdit->setMinimumWidth(20);

    /* Initialize friend list */
    QToolButton *button = new QToolButton(this);
    button->setIcon(QIcon(":/images/user/add_user24.png"));
    button->setToolTip(tr("Add a Friend"));
    connect(button, SIGNAL(clicked()), this, SLOT(addFriend()));
    ui.friendList->addToolButton(button);

    button = new QToolButton(this);
    button->setIcon(QIcon(":/images/friendsfolder24.png"));
    button->setToolTip(tr("Share files for your friends"));
    connect(button, SIGNAL(clicked()), this, SLOT(openShareManager()));
    ui.friendList->addToolButton(button);

    // load settings
    RsAutoUpdatePage::lockAllEvents();
    ui.friendList->setColumnVisible(FriendList::COLUMN_STATE, false);
    ui.friendList->setColumnVisible(FriendList::COLUMN_LAST_CONTACT, false);
    ui.friendList->setColumnVisible(FriendList::COLUMN_AVATAR, true);
    ui.friendList->setColumnVisible(FriendList::COLUMN_IP, false);
    ui.friendList->setShowGroups(false);
    processSettings(true);
    ui.friendList->setBigName(true);
    RsAutoUpdatePage::unlockAllEvents();

    // add self nick
    RsPeerDetails pd;
    RsPeerId ownId = rsPeers->getOwnId();
    if (rsPeers->getPeerDetails(ownId, pd)) {
        /* calculate only once */
        m_nickName = QString::fromUtf8(pd.name.c_str());
    }

    /* Show nick and current state */
    StatusInfo statusInfo;
    rsStatus->getOwnStatus(statusInfo);
    updateOwnStatus(QString::fromStdString(ownId.toStdString()), statusInfo.status);

    MainWindow *pMainWindow = MainWindow::getInstance();
    if (pMainWindow) {
        QMenu *pStatusMenu = new QMenu();
        pMainWindow->initializeStatusObject(pStatusMenu, true);
        ui.statusButton->setMenu(pStatusMenu);
    }

    loadmystatusmessage();
}

MessengerWindow::~MessengerWindow ()
{
    // save settings
    processSettings(false);

    MainWindow *pMainWindow = MainWindow::getInstance();
    if (pMainWindow) {
        pMainWindow->removeStatusObject(ui.statusButton);
    }

    _instance = NULL;
}

void MessengerWindow::processSettings(bool bLoad)
{
    Settings->beginGroup(_name);
    ui.friendList->processSettings(bLoad);
    Settings->endGroup();
}

/** Add a Friend ShortCut */
void MessengerWindow::addFriend()
{
    ConnectFriendWizard connwiz (this);

    connwiz.exec ();
}

//============================================================================

void MessengerWindow::closeEvent (QCloseEvent * /*event*/)
{
    /* save the expanded peers */
    if (expandedPeers == NULL) {
        expandedPeers = new std::set<std::string>;
    } else {
        expandedPeers->clear();
    }

    ui.friendList->getExpandedPeers(*expandedPeers);

    /* save the expanded groups */
    if (expandedGroups == NULL) {
        expandedGroups = new std::set<std::string>;
    } else {
        expandedGroups->clear();
    }

    ui.friendList->getExpandedGroups(*expandedGroups);
}

/** Shows Share Manager */
void MessengerWindow::openShareManager()
{
	ShareManager::showYourself();
}

/** Loads own personal status message */
void MessengerWindow::loadmystatusmessage()
{ 
    ui.messagelineEdit->setEditText( QString::fromUtf8(rsMsgs->getCustomStateString().c_str()));
}

/** Save own status message */
void MessengerWindow::savestatusmessage()
{
    rsMsgs->setCustomStateString(ui.messagelineEdit->currentText().toUtf8().constData());
}

void MessengerWindow::updateOwnStatus(const QString &peer_id, int status)
{
    // add self nick + own status
    if (peer_id == QString::fromStdString(rsPeers->getOwnId().toStdString()))
    {
        // my status has changed

        ui.statusButton->setText(m_nickName + " (" + StatusDefs::name(status) + ")");

        return;
    }
}