//////////////////////////////////////////////////////////////////////
//
// BeeBEEP Copyright (C) 2010-2021 Marco Mastroddi
//
// BeeBEEP 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 3 of the License,
// or (at your option) any later version.
//
// BeeBEEP 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 BeeBEEP. If not, see <http://www.gnu.org/licenses/>.
//
// Author: Marco Mastroddi <marco.mastroddi(AT)gmail.com>
//
// $Id: GuiHome.cpp 1468 2021-01-05 13:15:58Z mastroddi $
//
//////////////////////////////////////////////////////////////////////

#include "BeeUtils.h"
#include "GuiHome.h"
#include "GuiChatMessage.h"
#include "ChatManager.h"
#include "ChatMessage.h"
#include "IconManager.h"
#include "Settings.h"
#include "ShortcutManager.h"


GuiHome::GuiHome( QWidget* parent )
  : QWidget( parent )
{
  setObjectName( "GuiHome" );
  setupUi( this );
  m_prev_sys_mess = "";

  mp_teSystem->setObjectName( "GuiSystemViewer" );
  mp_teSystem->setFocusPolicy( Qt::ClickFocus );
  mp_teSystem->setReadOnly( true );
  mp_teSystem->setContextMenuPolicy( Qt::CustomContextMenu );
  mp_teSystem->setOpenExternalLinks( false );
  mp_teSystem->setOpenLinks( false );

  mp_lNews->setOpenExternalLinks( true );

  mp_menuContext = new QMenu( this );

  connect( mp_teSystem, SIGNAL( customContextMenuRequested( const QPoint& ) ), this, SLOT( customContextMenu( const QPoint& ) ) );
  connect( mp_teSystem, SIGNAL( anchorClicked( const QUrl& ) ), this, SLOT( checkAnchorClicked( const QUrl&  ) ) );
}

bool GuiHome::addSystemMessage( const ChatMessage& cm )
{
  if( !cm.isSystemActivity() )
    return false;

  QString sys_message = GuiChatMessage::formatSystemMessage( cm, ID_SYSTEM_MESSAGE, Settings::instance().homeShowMessageTimestamp(), false, Settings::instance().chatCompact() );

  if( sys_message.isEmpty() )
    return false;

  if( sys_message == m_prev_sys_mess )
    return false;

  m_prev_sys_mess = sys_message;

  QTextCursor cursor( mp_teSystem->textCursor() );
  cursor.movePosition( QTextCursor::End );
  cursor.insertHtml( sys_message );
  QScrollBar *bar = mp_teSystem->verticalScrollBar();
  if( bar )
    bar->setValue( bar->maximum() );
  return true;
}

void GuiHome::checkAnchorClicked( const QUrl& url )
{
  emit openUrlRequest( url );
}

void GuiHome::customContextMenu( const QPoint& )
{
  mp_menuContext->clear();
  mp_menuContext->addAction( IconManager::instance().icon( "background-color.png" ), tr( "Change background color" ) + QString("..."), this, SLOT( selectBackgroundColor() ) );
  mp_menuContext->addSeparator();
  mp_menuContext->addAction( IconManager::instance().icon( "select-all.png" ), tr( "Select all" ), mp_teSystem, SLOT( selectAll() ), QKeySequence::SelectAll );
  mp_menuContext->addSeparator();
  QAction* act = mp_menuContext->addAction( IconManager::instance().icon( "copy.png" ), tr( "Copy to clipboard" ), mp_teSystem, SLOT( copy() ), QKeySequence::Copy );
  act->setEnabled( !mp_teSystem->textCursor().selectedText().isEmpty() );
  mp_menuContext->addSeparator();
  act = mp_menuContext->addAction( IconManager::instance().icon( "printer.png" ), tr( "Print..." ), this, SLOT( printActivities() ) );
  QKeySequence ks = ShortcutManager::instance().shortcut( ShortcutManager::Print );
  if( !ks.isEmpty() && Settings::instance().useShortcuts() )
    act->setShortcut( ks );
  else
    act->setShortcut( QKeySequence() );
  mp_menuContext->addSeparator();
  act = mp_menuContext->addAction( tr( "Show the timestamp" ), this, SLOT( onAddTimestampClicked() ) );
  act->setCheckable( true );
  act->setChecked( Settings::instance().homeShowMessageTimestamp() );
  mp_menuContext->addSeparator();
  act = mp_menuContext->addAction( IconManager::instance().icon( "clear.png" ), tr( "Clear system messages" ), this, SLOT( clearSystemMessages() ) );
  mp_menuContext->exec( QCursor::pos() );
}

int GuiHome::loadSystemMessages()
{
  int num_sys_msg = 0;
  mp_teSystem->clear();
  Chat c = ChatManager::instance().defaultChat();
  foreach( ChatMessage cm, c.messages() )
  {
    if( addSystemMessage( cm ) )
      num_sys_msg++;
  }
  QTimer::singleShot( 0, this, SLOT( resetNews() ) );
  return num_sys_msg;
}

void GuiHome::clearSystemMessages()
{
  emit clearSystemMessagesRequest( ID_DEFAULT_CHAT );
}

void GuiHome::resetNews()
{
  setNews( "" );
}

void GuiHome::setNews( const QString& news )
{
  QString tooltip_text = "";
  if( news.isEmpty() )
  {
    mp_lNews->setText( QString( "<a style='text-decoration: none;' href='%1'><b>%2</b></a>" )
                         .arg( Settings::instance().newsWebSite() )
                         .arg( Bee::beeColorsToHtmlText( "B  e  e  B  E  E  P" ) ) );
    tooltip_text = tr( "Click here to see the latest news about BeeBEEP project" );
  }
  else
  {
    mp_lNews->setText( news );
    tooltip_text = tr( "Click here to read more" );
  }

  if( !tooltip_text.isEmpty() )
    mp_lNews->setToolTip( QString( "<span style='color: %1'>%2</span>" ).arg( Bee::colorYellow().name() ).arg( tooltip_text ) );
}

void GuiHome::reloadMessages()
{
  QApplication::setOverrideCursor( Qt::WaitCursor );
  mp_teSystem->clear();
  loadSystemMessages();
  QApplication::restoreOverrideCursor();
}

void GuiHome::onAddTimestampClicked()
{
  QAction* act = qobject_cast<QAction*>( sender() );
  if( !act )
    return;

  Settings::instance().setHomeShowMessageTimestamp( act->isChecked() );
  QTimer::singleShot( 100, this, SLOT( reloadMessages() ) );
}

void GuiHome::printActivities()
{
  QPrinter printer( QPrinter::HighResolution );
  printer.setFullPage( true );
  QPrintDialog *dlg = new QPrintDialog( &printer, this );
  dlg->setOptions( QAbstractPrintDialog::PrintSelection | QAbstractPrintDialog::PrintPageRange |
                   QAbstractPrintDialog::PrintShowPageSize |  QAbstractPrintDialog::PrintCollateCopies |
#if QT_VERSION >= 0x040700
                   QAbstractPrintDialog::PrintCurrentPage |
#endif
                   QAbstractPrintDialog::PrintToFile );

  if( dlg->exec() == QDialog::Accepted)
    mp_teSystem->print( dlg->printer() );

  dlg->deleteLater();
}

void GuiHome::selectBackgroundColor()
{
  QColor c = Bee::selectColor( this, Settings::instance().homeBackgroundColor() );
  if( c.isValid() )
  {
    Settings::instance().setHomeBackgroundColor( c.name() );
    updateBackground();
  }
}

void GuiHome::updateBackground()
{
  mp_teSystem->setStyleSheet( QString( "#GuiSystemViewer { background-color: %1; }" ).arg( Settings::instance().homeBackgroundColor() ) );
}