/*****************************************************************************
 * standardpanel.cpp : The "standard" playlist panel : just a treeview
 ****************************************************************************
 * Copyright (C) 2000-2005 the VideoLAN team
 * $Id: 15bceb5fc89736aef7fef01a359248f3fe7b6d15 $
 *
 * Authors: Clément Stenac <zorglub@videolan.org>
 *
 * 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.
 *****************************************************************************/

#ifdef HAVE_CONFIG_H
# include "config.h"
#endif

#include "qt4.hpp"
#include "dialogs_provider.hpp"

#include "components/playlist/playlist_model.hpp"
#include "components/playlist/panels.hpp"
#include "util/customwidgets.hpp"

#include <vlc_intf_strings.h>

#include <QPushButton>
#include <QHBoxLayout>
#include <QVBoxLayout>
#include <QHeaderView>
#include <QKeyEvent>
#include <QModelIndexList>
#include <QLabel>
#include <QSpacerItem>
#include <QMenu>
#include <QSignalMapper>
#include <assert.h>

#include "sorting.h"

StandardPLPanel::StandardPLPanel( PlaylistWidget *_parent,
                                  intf_thread_t *_p_intf,
                                  playlist_t *p_playlist,
                                  playlist_item_t *p_root ):
                                  PLPanel( _parent, _p_intf )
{
    model = new PLModel( p_playlist, p_intf, p_root, -1, this );

    QVBoxLayout *layout = new QVBoxLayout();
    layout->setSpacing( 0 ); layout->setMargin( 0 );

    /* Create and configure the QTreeView */
    view = new QVLCTreeView;
    view->header()->setSortIndicator( 0 , Qt::AscendingOrder );
    view->setSortingEnabled( true );
    view->setModel( model );
    view->setIconSize( QSize( 20, 20 ) );
    view->setAlternatingRowColors( true );
    view->setAnimated( true );
    view->setSelectionMode( QAbstractItemView::ExtendedSelection );
    view->setDragEnabled( true );
    view->setAcceptDrops( true );
    view->setDropIndicatorShown( true );
    view->setAutoScroll( true );


    getSettings()->beginGroup("Playlist");
    if( getSettings()->contains( "headerState" ) )
    {
        view->header()->restoreState(
                getSettings()->value( "headerState" ).toByteArray() );
    }
    else
    {
        /* Configure the size of the header */
        view->header()->resizeSection( 0, 200 );
        view->header()->resizeSection( 1, 80 );
    }
    view->header()->setSortIndicatorShown( true );
    view->header()->setClickable( true );
    view->header()->setContextMenuPolicy( Qt::CustomContextMenu );
    getSettings()->endGroup();

    /* Connections for the TreeView */
    CONNECT( view, activated( const QModelIndex& ) ,
             model,activateItem( const QModelIndex& ) );
    CONNECT( view, rightClicked( QModelIndex , QPoint ),
             this, doPopup( QModelIndex, QPoint ) );
    CONNECT( model, dataChanged( const QModelIndex&, const QModelIndex& ),
             this, handleExpansion( const QModelIndex& ) );
    CONNECT( view->header(), customContextMenuRequested( const QPoint & ),
             this, popupSelectColumn( QPoint ) );

    currentRootId = -1;
    CONNECT( parent, rootChanged( int ), this, setCurrentRootId( int ) );

    /* Buttons configuration */
    QHBoxLayout *buttons = new QHBoxLayout;

    /* Add item to the playlist button */
    addButton = new QPushButton;
    addButton->setIcon( QIcon( ":/playlist_add" ) );
    addButton->setMaximumWidth( 30 );
    BUTTONACT( addButton, popupAdd() );
    buttons->addWidget( addButton );

    /* Random 2-state button */
    randomButton = new QPushButton( this );
    randomButton->setIcon( QIcon( ":/shuffle_on" ));
    randomButton->setToolTip( qtr( I_PL_RANDOM ));
    randomButton->setCheckable( true );
    randomButton->setChecked( model->hasRandom() );
    BUTTONACT( randomButton, toggleRandom() );
    buttons->addWidget( randomButton );

    /* Repeat 3-state button */
    repeatButton = new QPushButton( this );
    repeatButton->setToolTip( qtr( "Click to toggle between loop one, loop all" ) );
    repeatButton->setCheckable( true );

    if( model->hasRepeat() )
    {
        repeatButton->setIcon( QIcon( ":/repeat_one" ) );
        repeatButton->setChecked( true );
    }
    else if( model->hasLoop() )
    {
        repeatButton->setIcon( QIcon( ":/repeat_all" ) );
        repeatButton->setChecked( true );
    }
    else
    {
        repeatButton->setIcon( QIcon( ":/repeat_one" ) );
        repeatButton->setChecked( false );
    }
    BUTTONACT( repeatButton, toggleRepeat() );
    buttons->addWidget( repeatButton );

    /* Goto */
    gotoPlayingButton = new QPushButton;
    BUTTON_SET_ACT_I( gotoPlayingButton, "", jump_to,
            qtr( "Show the current item" ), gotoPlayingItem() );
    buttons->addWidget( gotoPlayingButton );

    /* A Spacer and the search possibilities */
    QSpacerItem *spacer = new QSpacerItem( 10, 20 );
    buttons->addItem( spacer );

    QLabel *filter = new QLabel( qtr(I_PL_SEARCH) + " " );
    buttons->addWidget( filter );

    SearchLineEdit *search = new SearchLineEdit( this );
    buttons->addWidget( search );
    filter->setBuddy( search );
    CONNECT( search, textChanged( QString ), this, search( QString ) );

    /* Finish the layout */
    layout->addWidget( view );
    layout->addLayout( buttons );
//    layout->addWidget( bar );
    setLayout( layout );
}

/* Function to toggle between the Repeat states */
void StandardPLPanel::toggleRepeat()
{
    if( model->hasRepeat() )
    {
        model->setRepeat( false ); model->setLoop( true );
        repeatButton->setIcon( QIcon( ":/repeat_all" ) );
        repeatButton->setChecked( true );
    }
    else if( model->hasLoop() )
    {
        model->setRepeat( false ) ; model->setLoop( false );
        repeatButton->setChecked( false );
        repeatButton->setIcon( QIcon( ":/repeat_one" ) );
    }
    else
    {
        model->setRepeat( true ); model->setLoop( false );
        repeatButton->setChecked( true );
        repeatButton->setIcon( QIcon( ":/repeat_one" ) );
    }
}

/* Function to toggle between the Random states */
void StandardPLPanel::toggleRandom()
{
    bool prev = model->hasRandom();
    model->setRandom( !prev );
}

void StandardPLPanel::gotoPlayingItem()
{
    view->scrollTo( view->currentIndex() );
}

void StandardPLPanel::handleExpansion( const QModelIndex &index )
{
    if( model->isCurrent( index ) )
        view->scrollTo( index, QAbstractItemView::EnsureVisible );
}

void StandardPLPanel::setCurrentRootId( int _new )
{
    currentRootId = _new;
    if( currentRootId == THEPL->p_local_category->i_id ||
        currentRootId == THEPL->p_local_onelevel->i_id  )
    {
        addButton->setEnabled( true );
        addButton->setToolTip( qtr(I_PL_ADDPL) );
    }
    else if( ( THEPL->p_ml_category &&
                        currentRootId == THEPL->p_ml_category->i_id ) ||
             ( THEPL->p_ml_onelevel &&
                        currentRootId == THEPL->p_ml_onelevel->i_id ) )
    {
        addButton->setEnabled( true );
        addButton->setToolTip( qtr(I_PL_ADDML) );
    }
    else
        addButton->setEnabled( false );
}

/* PopupAdd Menu for the Add Menu */
void StandardPLPanel::popupAdd()
{
    QMenu popup;
    if( currentRootId == THEPL->p_local_category->i_id ||
        currentRootId == THEPL->p_local_onelevel->i_id )
    {
        popup.addAction( qtr(I_PL_ADDF), THEDP, SLOT(PLAppendDialog()) );
        popup.addAction( qtr(I_PL_ADDDIR), THEDP, SLOT( PLAppendDir()) );
    }
    else if( ( THEPL->p_ml_category &&
                currentRootId == THEPL->p_ml_category->i_id ) ||
             ( THEPL->p_ml_onelevel &&
                currentRootId == THEPL->p_ml_onelevel->i_id ) )
    {
        popup.addAction( qtr(I_PL_ADDF), THEDP, SLOT( MLAppendDialog() ) );
        popup.addAction( qtr(I_PL_ADDDIR), THEDP, SLOT( MLAppendDir() ) );
    }
    popup.exec( QCursor::pos() - addButton->mapFromGlobal( QCursor::pos() )
                        + QPoint( 0, addButton->height() ) );
}

void StandardPLPanel::popupSelectColumn( QPoint pos )
{
    ContextUpdateMapper = new QSignalMapper(this);

    QMenu selectColMenu;

    CONNECT( ContextUpdateMapper, mapped( int ),  model, viewchanged( int ) );

    int i_column = 1;
    for( i_column = 1; i_column != COLUMN_END; i_column<<=1 )
    {
        QAction* option = selectColMenu.addAction(
            qfu( psz_column_title( i_column ) ) );
        option->setCheckable( true );
        option->setChecked( model->shownFlags() & i_column );
        ContextUpdateMapper->setMapping( option, i_column );
        CONNECT( option, triggered(), ContextUpdateMapper, map() );
    }

    selectColMenu.exec( QCursor::pos() );
}

/* Search in the playlist */
void StandardPLPanel::search( QString searchText )
{
    model->search( searchText );
}

void StandardPLPanel::doPopup( QModelIndex index, QPoint point )
{
    if( !index.isValid() ) return;
    QItemSelectionModel *selection = view->selectionModel();
    QModelIndexList list = selection->selectedIndexes();
    model->popup( index, point, list );
}

/* Set the root of the new Playlist */
/* This activated by the selector selection */
void StandardPLPanel::setRoot( int i_root_id )
{
    QPL_LOCK;
    playlist_item_t *p_item = playlist_ItemGetById( THEPL, i_root_id );
    assert( p_item );
    p_item = playlist_GetPreferredNode( THEPL, p_item );
    assert( p_item );
    QPL_UNLOCK;

    model->rebuild( p_item );
}

void StandardPLPanel::removeItem( int i_id )
{
    model->removeItem( i_id );
}

/* Delete and Suppr key remove the selection
   FilterKey function and code function */
void StandardPLPanel::keyPressEvent( QKeyEvent *e )
{
    switch( e->key() )
    {
    case Qt::Key_Back:
    case Qt::Key_Delete:
        deleteSelection();
        break;
    }
}

void StandardPLPanel::deleteSelection()
{
    QItemSelectionModel *selection = view->selectionModel();
    QModelIndexList list = selection->selectedIndexes();
    model->doDelete( list );
}

StandardPLPanel::~StandardPLPanel()
{
    getSettings()->beginGroup("Playlist");
    getSettings()->setValue( "headerState", view->header()->saveState() );
    getSettings()->endGroup();
}


