/****************************************************************
 *  RetroShare is distributed under the following license:
 *
 *  Copyright (C) 2013 Cyril Soler
 *
 *  This program is free software; you can redistribute it and/or
 *  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 <iostream>
#include <QMessageBox>
#include <QTimer>
#include <retroshare/rsmsgs.h>
#include <retroshare/rspeers.h>
#include "CreateMsgLinkDialog.h"
#include <gui/common/FriendSelectionWidget.h>
#include <gui/RetroShareLink.h>

CreateMsgLinkDialog::CreateMsgLinkDialog(QWidget *parent)
	:QDialog(NULL, Qt::WindowSystemMenuHint | Qt::WindowTitleHint | Qt::WindowMinMaxButtonsHint | Qt::WindowCloseButtonHint)
{
	/* Invoke the Qt Designer generated object setup routine */
	setupUi(this);

	setAttribute(Qt::WA_DeleteOnClose, false);

	_info_GB->layout()->addWidget( _gpg_selection = new FriendSelectionWidget(this) ) ;

	QObject::connect(_link_type_CB,SIGNAL(currentIndexChanged(int)),this,SLOT(update())) ;
	QObject::connect(_create_link_PB,SIGNAL(clicked()),this,SLOT(createLink())) ;
	QObject::connect(_create_new_PB,SIGNAL(toggled(bool)),this,SLOT(toggleCreateLink(bool))) ;
	QObject::connect(_existing_links_LW,SIGNAL(currentRowChanged(int)),this,SLOT(updateCurrentRow(int))) ;

	_gpg_selection->setModus(FriendSelectionWidget::MODUS_SINGLE) ;
	_gpg_selection->setShowType(FriendSelectionWidget::SHOW_NON_FRIEND_GPG | FriendSelectionWidget::SHOW_GPG) ;
	_gpg_selection->setHeaderText(QObject::tr("Select who can contact you:")) ;
	_gpg_selection->start() ;

	toggleCreateLink(false) ;
	update() ;
	updateCurrentRow(-1) ;
}

void CreateMsgLinkDialog::updateCurrentRow(int r)
{
	if(r < 0)
	{
		_current_link_type_LE->setText("") ;
		_current_link_dst_LE->setText("") ;
		_current_link_date_DE->setDateTime(QDateTime::fromMSecsSinceEpoch(0)) ;
		return  ;
	}

	QUrl text = _existing_links_LW->item(r)->data(Qt::UserRole).toUrl() ;
	
	std::cerr << "Parsing link : " << text.toString().toStdString() << std::endl;
	RetroShareLink link(text) ;

	if( link.type() == RetroShareLink::TYPE_PRIVATE_CHAT )
		_current_link_type_LE->setText( tr("Private chat invite") ) ;
	else
		_current_link_type_LE->setText( tr("Public message invite") ) ;

	_current_link_dst_LE->setText(link.GPGId()) ;
	_current_link_date_DE->setDateTime(QDateTime::fromMSecsSinceEpoch(link.timeStamp() * 1000 )) ;
}

void CreateMsgLinkDialog::toggleCreateLink(bool b)
{
	_new_link_F->setHidden(!b) ;
}
void CreateMsgLinkDialog::update()
{
	if(_link_type_CB->currentIndex() == 0)
	{
		QString s ;

		s += "A private chat invite allows a specific peer to contact you using encrypted private chat. You need to select a destination peer from your PGP keyring before creating the link. The link contains the encryption code and your PGP signature, so that the peer can authenticate you." ;

		_info_TB->setHtml(s) ;
		_gpg_selection->setHidden(false) ;
	}
	else
	{
		QString s ;

		s += "A public message link allows any peer in the nearby network to send a private message to you. The message is encrypted and only you can read it." ;

		_info_TB->setHtml(s) ;
		_gpg_selection->setHidden(true) ;
	}

	std::vector<DistantChatInviteInfo> invites ;

	rsMsgs->getDistantChatInviteList(invites) ;

	_existing_links_LW->clear() ;

	for(uint32_t i=0;i<invites.size();++i)
	{
		RetroShareLink link ;

		if(!link.createPrivateChatInvite(invites[i].time_of_validity,QString::fromStdString(invites[i].destination_pgp_id),QString::fromStdString(invites[i].encrypted_radix64_string)));
			std::cerr << "Cannot create link." << std::endl;

		QListWidgetItem *item = new QListWidgetItem;
		item->setData(Qt::DisplayRole,tr("Private chat invite to ")+QString::fromStdString(invites[i].destination_pgp_id)) ;
		item->setData(Qt::UserRole,link.toString()) ;

		_existing_links_LW->insertItem(0,item) ;
	}

	std::vector<DistantOfflineMessengingInvite> invites2 ;

	rsMsgs->getDistantOfflineMessengingInvites(invites2) ;

	for(uint32_t i=0;i<invites2.size();++i)
	{
		RetroShareLink link ;

		if(!link.createPublicMsgInvite(invites2[i].time_of_validity,QString::fromStdString(invites2[i].issuer_pgp_id),QString::fromStdString(invites2[i].hash)))
			std::cerr << "Cannot create link." << std::endl;
		else
		{
			QListWidgetItem *item = new QListWidgetItem;
			item->setData(Qt::DisplayRole,tr("Private chat invite to ")+QString::fromStdString(invites2[i].issuer_pgp_id)) ;
			item->setData(Qt::UserRole,link.toString()) ;

			_existing_links_LW->insertItem(0,item) ;
		}
	}


}

time_t CreateMsgLinkDialog::computeValidityDuration() const
{
	time_t unit ;

	switch(_validity_time_CB->currentIndex())
	{
		default:
		case 0: unit = 3600 ; 
				  break ;
		case 1: unit = 3600*24 ; 
				  break ;
		case 2: unit = 3600*24*7 ; 
				  break ;
		case 3: unit = 3600*24*30 ; 
				  break ;
		case 4: unit = 3600*24*365 ; 
				  break ;
	}

	return unit * _validity_time_SB->value() ;
}

void CreateMsgLinkDialog::createLink()
{
	std::cerr << "Creating link!" << std::endl;

	if(_link_type_CB->currentIndex() == 0)
	{
		time_t validity_duration = computeValidityDuration() ;
		FriendSelectionWidget::IdType type ;
		std::string current_pgp_id = _gpg_selection->selectedId(type) ;

		std::string encrypted_string ;

		bool res = rsMsgs->createDistantChatInvite(current_pgp_id,validity_duration,encrypted_string) ;

		RetroShareLink link ;

		if(!link.createPrivateChatInvite(validity_duration + time(NULL),QString::fromStdString(current_pgp_id),QString::fromStdString(encrypted_string)) )
			std::cerr << "Cannot create link." << std::endl;

		QList<RetroShareLink> links ;
		links.push_back(link) ;

		RSLinkClipboard::copyLinks(links) ;

		if(!res)
			QMessageBox::critical(NULL,tr("Private chat invite creation failed"),tr("The creation of the chat invite failed")) ;
		else
			QMessageBox::information(NULL,tr("Private chat invite created"),tr("Your new chat invite has been copied to clipboard. You can now paste it as a Retroshare link.")) ;
	}
	else
	{
		time_t validity_duration = computeValidityDuration() ;
		std::string hash; 
		std::string issuer_pgp_id = rsPeers->getGPGOwnId() ;

		bool res = rsMsgs->createDistantOfflineMessengingInvite(validity_duration,hash) ;

		RetroShareLink link ;

		if(!link.createPublicMsgInvite(validity_duration + time(NULL),QString::fromStdString(issuer_pgp_id),QString::fromStdString(hash)) )
		{
			std::cerr << "Cannot create link." << std::endl;
			return ;
		}

		QList<RetroShareLink> links ;
		links.push_back(link) ;

		RSLinkClipboard::copyLinks(links) ;

		if(!res)
			QMessageBox::critical(NULL,tr("Messenging invite creation failed"),tr("The creation of the messenging invite failed")) ;
		else
			QMessageBox::information(NULL,tr("Messenging invite created"),tr("Your new messenging chat invite has been copied to clipboard. You can now paste it as a Retroshare link.")) ;
	}

	QTimer::singleShot(100,this,SLOT(update())) ;
}