/*

 * Hedgewars, a free turn based strategy game

 * Copyright (c) 2004-2015 Andrey Korotaev <unC0Rr@gmail.com>

 *

 * 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; version 2 of the License

 *

 * 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 St, Fifth Floor, Boston, MA  02110-1301  USA

 */

#include <QGridLayout>

#include <QPushButton>

#include <QGroupBox>

#include <QComboBox>

#include <QCheckBox>

#include <QLabel>

#include <QLineEdit>

#include <QSpinBox>

#include <QTableWidget>

#include <QDir>

#include <QProgressBar>

#include <QStringList>

#include <QDesktopServices>

#include <QUrl>

#include <QList>

#include <QMessageBox>

#include <QHeaderView>

#include <QKeyEvent>

#include <QVBoxLayout>

#include <QHBoxLayout>

#include <QFileSystemWatcher>

#include <QDateTime>

#include <QRegExp>

#include <QXmlStreamReader>

#include "hwconsts.h"

#include "pagevideos.h"

#include "igbox.h"

#include "LibavInteraction.h"

#include "gameuiconfig.h"

#include "recorder.h"

#include "ask_quit.h"

static const QSize ThumbnailSize(350, 350*3/5);

// columns in table with list of video files

enum VideosColumns

{

    vcName,

    vcSize,

    vcProgress, // for encoding

    vcNumColumns,

};

// this class is used for items in first column in file-table

class VideoItem : public QTableWidgetItem

{

    // note: QTableWidgetItem is not Q_OBJECT

    public:

        VideoItem(const QString& name);

        ~VideoItem();

        QString name;

        QString prefix; // original filename without extension

        QString desc;   // description (duration, resolution, etc...)

        HWRecorder    * pRecorder; // non NULL if file is being encoded

        bool seen; // used when updating directory

        float lastSizeUpdate;

        float progress;

        bool ready()

        { return !pRecorder; }

        QString path()

        { return cfgdir->absoluteFilePath("Videos/" + name);  }

};

VideoItem::VideoItem(const QString& name)

: QTableWidgetItem(name, UserType)

{

    this->name = name;

    pRecorder = NULL;

    lastSizeUpdate = 0;

    progress = 0;

    seen = false;

}

VideoItem::~VideoItem()

{}

QLayout * PageVideos::bodyLayoutDefinition()

{

    QGridLayout * pPageLayout = new QGridLayout();

    pPageLayout->setColumnStretch(0, 1);

    pPageLayout->setColumnStretch(1, 2);

    // list of videos

    {

        IconedGroupBox* pTableGroup = new IconedGroupBox(this);

        pTableGroup->setIcon(QIcon(":/res/Videos.png"));

        pTableGroup->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);

        pTableGroup->setTitle(QGroupBox::tr("Videos"));

        QStringList columns;

        columns << tr("Name");

        columns << tr("Size");

        columns << "";

        filesTable = new QTableWidget(pTableGroup);

        filesTable->setColumnCount(vcNumColumns);

        filesTable->setHorizontalHeaderLabels(columns);

        filesTable->setSelectionBehavior(QAbstractItemView::SelectRows);

        filesTable->setSelectionMode(QAbstractItemView::SingleSelection);

        filesTable->setEditTriggers(QAbstractItemView::SelectedClicked);

        filesTable->verticalHeader()->hide();

        filesTable->setMinimumWidth(400);

        QHeaderView * header = filesTable->horizontalHeader();

        header->setSectionResizeMode(vcName, QHeaderView::ResizeToContents);

        header->setSectionResizeMode(vcSize, QHeaderView::Fixed);

        header->resizeSection(vcSize, 100);

        header->setStretchLastSection(true);

        btnOpenDir = new QPushButton(QPushButton::tr("Open videos directory"), pTableGroup);

        btnOpenDir->setWhatsThis(QPushButton::tr("Open the video directory in your system"));

        QVBoxLayout *box = new QVBoxLayout(pTableGroup);

        box->addWidget(filesTable);

        box->addWidget(btnOpenDir);

        pPageLayout->addWidget(pTableGroup, 0, 1);

    }

    // description

    {

        IconedGroupBox* pDescGroup = new IconedGroupBox(this);

        pDescGroup->setIcon(QIcon(":/res/miscicon.png"));

        pDescGroup->setTitle(QGroupBox::tr("Description"));

        QVBoxLayout* pDescLayout = new QVBoxLayout(pDescGroup);

        QHBoxLayout* pBottomDescLayout = new QHBoxLayout(0); // buttons

        // label with thumbnail picture

        labelThumbnail = new QLabel(pDescGroup);

        labelThumbnail->setAlignment(Qt::AlignHCenter | Qt::AlignVCenter);

        labelThumbnail->setMaximumSize(ThumbnailSize);

        labelThumbnail->setStyleSheet(

                    "QFrame {"

                    "border: solid;"

                    "border-width: 3px;"

                    "border-color: #ffcc00;"

                    "border-radius: 4px;"

                    "}" );

        clearThumbnail();

        // label with file description

        labelDesc = new QLabel(pDescGroup);

        labelDesc->setAlignment(Qt::AlignLeft | Qt::AlignTop);

        labelDesc->setTextInteractionFlags(Qt::TextSelectableByMouse |

                                           Qt::TextSelectableByKeyboard |

                                           Qt::LinksAccessibleByMouse |

                                           Qt::LinksAccessibleByKeyboard);

        labelDesc->setTextFormat(Qt::RichText);

        labelDesc->setWordWrap(true);

        labelDesc->setOpenExternalLinks(true);

        // buttons: play and delete

        btnPlay = new QPushButton(QPushButton::tr("Play"), pDescGroup);

        btnPlay->setEnabled(false);

        btnPlay->setWhatsThis(QPushButton::tr("Play this video"));

        pBottomDescLayout->addWidget(btnPlay);

        btnDelete = new QPushButton(QPushButton::tr("Delete"), pDescGroup);

        btnDelete->setEnabled(false);

        btnDelete->setWhatsThis(QPushButton::tr("Delete this video"));

        pBottomDescLayout->addWidget(btnDelete);

        pDescLayout->addWidget(labelThumbnail, 0);

        pDescLayout->addWidget(labelDesc, 0);

        pDescLayout->addLayout(pBottomDescLayout, 0);

        pDescLayout->addStretch(1);

        pPageLayout->addWidget(pDescGroup, 0, 0);

    }

    return pPageLayout;

}

QLayout * PageVideos::footerLayoutDefinition()

{

    return NULL;

}

void PageVideos::connectSignals()

{

    connect(filesTable, SIGNAL(cellDoubleClicked(int, int)), this, SLOT(cellDoubleClicked(int, int)));

    connect(filesTable, SIGNAL(cellChanged(int,int)), this, SLOT(cellChanged(int, int)));

    connect(filesTable, SIGNAL(currentCellChanged(int,int,int,int)), this, SLOT(currentCellChanged()));

    connect(btnPlay,   SIGNAL(clicked()), this, SLOT(playSelectedFile()));

    connect(btnDelete, SIGNAL(clicked()), this, SLOT(deleteSelectedFiles()));

    connect(btnOpenDir, SIGNAL(clicked()), this, SLOT(openVideosDirectory()));

}

PageVideos::PageVideos(QWidget* parent) : AbstractPage(parent),

    config(0)

{

    nameChangedFromCode = false;

    numRecorders = 0;

    initPage();

}

void PageVideos::init(GameUIConfig * config)

{

    this->config = config;

    QString path = cfgdir->absolutePath() + "/Videos";

    QFileSystemWatcher * pWatcher = new QFileSystemWatcher(this);

    pWatcher->addPath(path);

    connect(pWatcher, SIGNAL(directoryChanged(const QString &)), this, SLOT(updateFileList(const QString &)));

    updateFileList(path);

    startEncoding(); // this is for videos recorded from demos which were executed directly (without frontend)

}

// get file size as string

static QString FileSizeStr(const QString & path)

{

    quint64 size = QFileInfo(path).size();

    quint64 KiB = 1024;

    quint64 MiB = 1024*KiB;

    quint64 GiB = 1024*MiB;

    QString sizeStr;

    if (size >= GiB)

        return QString("%1 GiB").arg(QString::number(float(size)/GiB, 'f', 2));

    if (size >= MiB)

        return QString("%1 MiB").arg(QString::number(float(size)/MiB, 'f', 2));

     if (size >= KiB)

        return QString("%1 KiB").arg(QString::number(float(size)/KiB, 'f', 2));

    return PageVideos::tr("%1 bytes", "", size).arg(QString::number(size));

}

// set file size in file list in specified row

void PageVideos::updateSize(int row)

{

    VideoItem * item = nameItem(row);

    QString path = item->ready()? item->path() : cfgdir->absoluteFilePath("VideoTemp/" + item->pRecorder->name);

    filesTable->item(row, vcSize)->setText(FileSizeStr(path));

}

// There is a button 'Open videos dir', so it is possible that user will open

// this dir and rename/delete some files there, so we should handle this.

void PageVideos::updateFileList(const QString & path)

{

    // mark all files as non seen

    int numRows = filesTable->rowCount();

    for (int i = 0; i < numRows; i++)

        nameItem(i)->seen = false;

    QStringList files = QDir(path).entryList(QDir::Files);

    foreach (const QString & name, files)

    {

        int row = -1;

        foreach (QTableWidgetItem * item, filesTable->findItems(name, Qt::MatchExactly))

        {

            if (item->type() != QTableWidgetItem::UserType || !((VideoItem*)item)->ready())

                continue;

            row = item->row();

            break;

        }

        if (row == -1)

            row = appendRow(name);

        VideoItem * item = nameItem(row);

        item->seen = true;

        item->desc = "";

        updateSize(row);

    }

    // remove all non seen files

    for (int i = 0; i < filesTable->rowCount();)

    {

        VideoItem * item = nameItem(i);

        if (item->ready() && !item->seen)

            filesTable->removeRow(i);

        else

            i++;

    }

}

void PageVideos::addRecorder(HWRecorder* pRecorder)

{

    int row = appendRow(pRecorder->name);

    VideoItem * item = nameItem(row);

    item->pRecorder = pRecorder;

    pRecorder->item = item;

    // add progress bar

    QProgressBar * progressBar = new QProgressBar(filesTable);

    progressBar->setMinimum(0);

    progressBar->setMaximum(10000);

    progressBar->setValue(0);

    connect(pRecorder, SIGNAL(onProgress(float)), this, SLOT(updateProgress(float)));

    connect(pRecorder, SIGNAL(encodingFinished(bool)), this, SLOT(encodingFinished(bool)));

    filesTable->setCellWidget(row, vcProgress, progressBar);

    numRecorders++;

}

void PageVideos::setProgress(int row, VideoItem* item, float value)

{

    QProgressBar * progressBar = (QProgressBar*)filesTable->cellWidget(row, vcProgress);

    progressBar->setValue(value*10000);

    progressBar->setFormat(QString("%1%").arg(value*100, 0, 'f', 2));

    item->progress = value;

}

void PageVideos::updateProgress(float value)

{

    HWRecorder * pRecorder = (HWRecorder*)sender();

    VideoItem * item = pRecorder->item;

    int row = filesTable->row(item);

    // update file size every percent

    if (value - item->lastSizeUpdate > 0.01)

    {

        updateSize(row);

        item->lastSizeUpdate = value;

    }

    setProgress(row, item, value);

}

void PageVideos::encodingFinished(bool success)

{

    numRecorders--;

    HWRecorder * pRecorder = (HWRecorder*)sender();

    VideoItem * item = (VideoItem*)pRecorder->item;

    int row = filesTable->row(item);

    if (success)

    {

        // move file to destination

        success = cfgdir->rename("VideoTemp/" + pRecorder->name, "Videos/" + item->name);

        if (!success)

        {

            // unable to rename for some reason (maybe user entered incorrect name);

            // try to use temp name instead.

            success = cfgdir->rename("VideoTemp/" + pRecorder->name, "Videos/" + pRecorder->name);

            if (success)

                setName(item, pRecorder->name);

        }

    }

    if (!success)

    {

        filesTable->removeRow(row);

        return;

    }

    filesTable->setCellWidget(row, vcProgress, NULL); // remove progress bar

    item->pRecorder = NULL;

    updateSize(row);

    updateDescription();

}

void PageVideos::cellDoubleClicked(int row, int column)

{

    Q_UNUSED(column);

    play(row);

}

void PageVideos::cellChanged(int row, int column)

{

    // user can only edit name

    if (column != vcName || nameChangedFromCode)

        return;

    // user has edited filename, so we should rename the file

    VideoItem * item = nameItem(row);

    QString oldName = item->name;

    QString newName = item->text();

    if (!newName.contains('.')) // user forgot an extension

    {

        // restore old extension

        int pt = oldName.lastIndexOf('.');

        if (pt != -1)

        {

            newName += oldName.right(oldName.length() - pt);

            setName(item, newName);

        }

    }

#ifdef Q_OS_WIN

    // there is a bug in qt, QDir::rename() doesn't fail on such names but damages files

    if (newName.contains(QRegExp("[\"*:<>?\\/|]")))

    {

        setName(item, oldName);

        return;

    }

#endif

    if (item->ready() && !cfgdir->rename("Videos/" + oldName, "Videos/" + newName))

    {

        // unable to rename for some reason (maybe user entered incorrect name),

        // therefore restore old name in cell

        setName(item, oldName);

        return;

    }

    item->name = newName;

    updateDescription();

}

void PageVideos::setName(VideoItem * item, const QString & newName)

{

    nameChangedFromCode = true;

    item->setText(newName);

    nameChangedFromCode = false;

    item->name = newName;

}

int PageVideos::appendRow(const QString & name)

{

    int row = filesTable->rowCount();

    filesTable->setRowCount(row+1);

    // add 'name' item

    QTableWidgetItem * item = new VideoItem(name);

    item->setFlags(Qt::ItemIsEnabled | Qt::ItemIsSelectable | Qt::ItemIsEditable);

    nameChangedFromCode = true;

    filesTable->setItem(row, vcName, item);

    nameChangedFromCode = false;

    // add 'size' item

    item = new QTableWidgetItem();

    item->setFlags(Qt::ItemIsEnabled | Qt::ItemIsSelectable);

    item->setTextAlignment(Qt::AlignRight);

    filesTable->setItem(row, vcSize, item);

    // add 'progress' item

    item = new QTableWidgetItem();

    item->setFlags(Qt::ItemIsEnabled | Qt::ItemIsSelectable);

    filesTable->setItem(row, vcProgress, item);

    return row;

}

VideoItem* PageVideos::nameItem(int row)

{

    return (VideoItem*)filesTable->item(row, vcName);

}

void PageVideos::clearThumbnail()

{

    // add empty (transparent) image for proper sizing

    QPixmap pic(ThumbnailSize);

    pic.fill(QColor(0,0,0,0));

    labelThumbnail->setPixmap(pic);

}

void PageVideos::updateDescription()

{

    VideoItem * item = nameItem(filesTable->currentRow());

    if (!item)

    {

        // nothing is selected => clear description and return

        labelDesc->clear();

        clearThumbnail();

        btnPlay->setEnabled(false);

        btnDelete->setEnabled(false);

        return;

    }

    btnPlay->setEnabled(item->ready());

    btnDelete->setEnabled(true);

    btnDelete->setText(item->ready()? QPushButton::tr("Delete") :  QPushButton::tr("Cancel"));

    // construct string with desctiption of this file to display it

    QString desc = item->name + "\n\n";

    if (!item->ready())

        desc += tr("(in progress...)");

    else

    {

        QString path = item->path();