// rdpodcastlistmodel.cpp
//
// Data model for Rivendell podcast episodes
//
//   (C) Copyright 2021 Fred Gleason <fredg@paravelsystems.com>
//
//   This program is free software; you can redistribute it and/or modify
//   it under the terms of the GNU General Public License version 2 as
//   published by the Free Software Foundation.
//
//   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., 675 Mass Ave, Cambridge, MA 02139, USA.
//

#include "rdapplication.h"
#include "rdconf.h"
#include "rdescape_string.h"
#include "rdpodcast.h"
#include "rdpodcastlistmodel.h"

RDPodcastListModel::RDPodcastListModel(unsigned feed_id,QObject *parent)
  : QAbstractTableModel(parent)
{
  d_feed_id=feed_id;
  d_font_metrics=NULL;
  d_bold_font_metrics=NULL;

  //
  // Column Attributes
  //
  unsigned left=Qt::AlignLeft|Qt::AlignVCenter;
  unsigned center=Qt::AlignCenter;
  unsigned right=Qt::AlignRight|Qt::AlignVCenter;

  d_headers.push_back(tr("Title"));       // 00
  d_alignments.push_back(left);

  d_headers.push_back(tr("Status"));      // 01
  d_alignments.push_back(center);

  d_headers.push_back(tr("Start"));       // 02
  d_alignments.push_back(left);

  d_headers.push_back(tr("Expiration"));  // 03
  d_alignments.push_back(left);

  d_headers.push_back(tr("Length"));      // 04
  d_alignments.push_back(right);

  d_headers.push_back(tr("Feed"));        // 05
  d_alignments.push_back(center);

  d_headers.push_back(tr("Category"));    // 06
  d_alignments.push_back(left);

  d_headers.push_back(tr("Posted By"));   // 07
  d_alignments.push_back(left);

  d_headers.push_back(tr("SHA1"));        // 08
  d_alignments.push_back(left);

  updateModel();
}


RDPodcastListModel::~RDPodcastListModel()
{
}


QPalette RDPodcastListModel::palette()
{
  return d_palette;
}


void RDPodcastListModel::setPalette(const QPalette &pal)
{
  d_palette=pal;
}


void RDPodcastListModel::setFont(const QFont &font)
{
  d_font=font;
  if(d_font_metrics!=NULL) {
    delete d_font_metrics;
  }
  d_font_metrics=new QFontMetrics(d_font);

  d_bold_font=font;
  d_bold_font.setWeight(QFont::Bold);
  if(d_bold_font_metrics!=NULL) {
    delete d_bold_font_metrics;
  }
  d_bold_font_metrics=new QFontMetrics(d_bold_font);
}


int RDPodcastListModel::columnCount(const QModelIndex &parent) const
{
  return d_headers.size();
}


int RDPodcastListModel::rowCount(const QModelIndex &parent) const
{
  return d_texts.size();
}


QVariant RDPodcastListModel::headerData(int section,Qt::Orientation orient,
				    int role) const
{
  if((orient==Qt::Horizontal)&&(role==Qt::DisplayRole)) {
    return d_headers.at(section);
  }
  return QVariant();
}


QVariant RDPodcastListModel::data(const QModelIndex &index,int role) const
{
  QString str;
  int col=index.column();
  int row=index.row();

  if(row<d_texts.size()) {
    switch((Qt::ItemDataRole)role) {
    case Qt::DisplayRole:
      return d_texts.at(row).at(col);

    case Qt::DecorationRole:
      return d_icons.at(row).at(col);

    case Qt::TextAlignmentRole:
      return d_alignments.at(col);

    case Qt::FontRole:
      if(col==0) {
	return d_bold_font;
      }
      return d_font;

    case Qt::TextColorRole:
      // Nothing to do!
      break;

    case Qt::BackgroundRole:
      // Nothing to do!
      break;

    case Qt::SizeHintRole:
      if(col==0) {
	return QSize(RD_LISTWIDGET_ITEM_WIDTH_PADDING+
		     (d_icons.at(row).at(col).value<QPixmap>().width())+
		     d_bold_font_metrics->
		     width(d_texts.at(row).at(col).toString()),40);
      }
      return QSize(RD_LISTWIDGET_ITEM_WIDTH_PADDING+
		   (d_icons.at(row).at(col).value<QPixmap>().width())+
		   d_font_metrics->
		   width(d_texts.at(row).at(col).toString()),40);

    default:
      break;
    }
  }

  return QVariant();
}


unsigned RDPodcastListModel::castId(const QModelIndex &row) const
{
  return d_cast_ids.at(row.row());
}


QModelIndex RDPodcastListModel::addCast(unsigned cast_id)
{
  beginInsertRows(QModelIndex(),0,0);
  QList<QVariant> list;
  for(int i=0;i<columnCount();i++) {
    list.push_back(QVariant());
  }
  d_cast_ids.insert(0,cast_id);
  d_texts.insert(0,list);
  d_icons.insert(0,list);
  updateRowLine(0);
  endInsertRows();

  return createIndex(0,0);
}


void RDPodcastListModel::removeCast(const QModelIndex &row)
{
  beginRemoveRows(QModelIndex(),row.row(),row.row());

  d_cast_ids.removeAt(row.row());
  d_texts.removeAt(row.row());
  d_icons.removeAt(row.row());

  endRemoveRows();
}


void RDPodcastListModel::removeCast(unsigned cast_id)
{
  for(int i=0;i<d_cast_ids.size();i++) {
    if(d_cast_ids.at(i)==cast_id) {
      removeCast(createIndex(i,0));
      return;
    }
  }
}


void RDPodcastListModel::refresh(const QModelIndex &row)
{
  if(row.row()<d_texts.size()) {
    QString sql=sqlFields()+
      "where "+
      QString().sprintf("PODCASTS.ID=%u",d_cast_ids.at(row.row()));
    RDSqlQuery *q=new RDSqlQuery(sql);
    if(q->first()) {
      updateRow(row.row(),q);
      emit dataChanged(createIndex(row.row(),0),
		       createIndex(row.row(),columnCount()));
    }
    delete q;
  }
}


void RDPodcastListModel::refresh(unsigned cast_id)
{
  for(int i=0;i<d_cast_ids.size();i++) {
    if(d_cast_ids.at(i)==cast_id) {
      updateRowLine(i);
      return;
    }
  }
}


void RDPodcastListModel::setFilterSql(const QString &sql)
{
  if(sql!=d_filter_sql) {
    d_filter_sql=sql;
    updateModel();
  }
}


void RDPodcastListModel::processNotification(RDNotification *notify)
{
  unsigned cast_id=0;
  RDPodcast *cast=NULL;

  if(notify->type()==RDNotification::FeedItemType) {
    cast_id=notify->id().toUInt();
    cast=new RDPodcast(rda->config(),cast_id);
    if(cast->feedId()==d_feed_id) {
      switch(notify->action()) {
      case RDNotification::AddAction:
	addCast(cast_id);
	break;

      case RDNotification::DeleteAction:
	removeCast(cast_id);
	break;

      case RDNotification::ModifyAction:
	refresh(cast_id);
	break;

      case RDNotification::LastAction:
      case RDNotification::NoAction:
	break;
	
      }
    }
    delete cast;
  }
}


void RDPodcastListModel::updateModel()
{
  QList<QVariant> texts;

  RDSqlQuery *q=NULL;
  QString sql=sqlFields()+
    "where "+
    QString().sprintf("PODCASTS.FEED_ID=%u ",d_feed_id)+
    d_filter_sql+
    " order by PODCASTS.ORIGIN_DATETIME desc";
  beginResetModel();
  d_cast_ids.clear();
  d_texts.clear();
  d_icons.clear();
  q=new RDSqlQuery(sql);
  while(q->next()) {
    d_cast_ids.push_back(0);
    d_texts.push_back(texts);
    d_icons.push_back(texts);
    updateRow(d_texts.size()-1,q);
  }
  delete q;
  endResetModel();
}


void RDPodcastListModel::updateRowLine(int line)
{
  if(line<d_texts.size()) {
    QString sql=sqlFields()+
      "where "+
      QString().sprintf("PODCASTS.ID=%u",d_cast_ids.at(line));
    RDSqlQuery *q=new RDSqlQuery(sql);
    if(q->first()) {
      updateRow(line,q);
    }
    delete q;
  }
}


void RDPodcastListModel::updateRow(int row,RDSqlQuery *q)
{
  QList<QVariant> texts;
  QList<QVariant> icons;

  // Title
  texts.push_back(q->value(2));
  if(q->value(13).isNull()) {
    icons.push_back(rda->iconEngine()->
		    applicationIcon(RDIconEngine::RdCastManager,32));
  }
  else {
    icons.push_back(QImage::fromData(q->value(13).toByteArray()).
		 scaled(32,32,Qt::IgnoreAspectRatio,Qt::SmoothTransformation));
  }

  // Status
  texts.push_back(QVariant());
  switch((RDPodcast::Status)q->value(1).toUInt()) {
  case RDPodcast::StatusActive:
    if(q->value(3).toDateTime()<=QDateTime::currentDateTime()) {
      icons.push_back(rda->iconEngine()->listIcon(RDIconEngine::GreenBall));
    }
    else {
      icons.push_back(rda->iconEngine()->listIcon(RDIconEngine::BlueBall));
    }
    break;


  case RDPodcast::StatusPending:
    icons.push_back(rda->iconEngine()->listIcon(RDIconEngine::RedBall));
    break;

  case RDPodcast::StatusExpired:
    icons.push_back(rda->iconEngine()->listIcon(RDIconEngine::WhiteBall));
  }

  // Start
  texts.push_back(q->value(3).toDateTime().toString("MM/dd/yyyy hh:mm:ss"));
  icons.push_back(QVariant());

  // Expiration
  if(q->value(4).toDateTime().isValid()) {
    texts.push_back(q->value(4).toDateTime().toString("MM/dd/yyyy hh:mm:ss"));
  }
  else {
    texts.push_back(tr("Never"));
  }
  icons.push_back(QVariant());

  // Length
  texts.push_back(RDGetTimeLength(q->value(5).toInt(),false,false));
  icons.push_back(QVariant());

  // Feed Keyname
  texts.push_back(q->value(7));
  icons.push_back(QVariant());

  // Category
  texts.push_back(q->value(8));
  icons.push_back(QVariant());

  // Posted By
  if(q->value(9).isNull()) {
    texts.push_back(tr("unknown")+" "+tr("at")+" "+
		    q->value(11).toDateTime().toString("MM/dd/yyyy hh:mm:ss"));
    }
  else {
    texts.push_back(q->value(9).toString()+" "+tr("on")+" "+
		    q->value(10).toString()+" "+tr("at")+" "+
		    q->value(11).toDateTime().toString("MM/dd/yyyy hh:mm:ss"));
  }
  icons.push_back(QVariant());

  // SHA1
  if(q->value(12).toString().isEmpty()) {
    texts.push_back(tr("[none]"));
  }
  else {
    texts.push_back(q->value(12));
  }
  icons.push_back(QVariant());

  d_cast_ids[row]=q->value(0).toUInt();
  d_texts[row]=texts;
  d_icons[row]=icons;
}


QString RDPodcastListModel::sqlFields() const
{
  QString sql=QString("select ")+
    "PODCASTS.ID,"+                   // 00
    "PODCASTS.STATUS,"+               // 01
    "PODCASTS.ITEM_TITLE,"+           // 02
    "PODCASTS.EFFECTIVE_DATETIME,"+   // 03
    "PODCASTS.EXPIRATION_DATETIME,"+  // 04
    "PODCASTS.AUDIO_TIME,"+           // 05
    "PODCASTS.ITEM_DESCRIPTION,"+     // 06
    "FEEDS.KEY_NAME,"+                // 07
    "PODCASTS.ITEM_CATEGORY,"+        // 08
    "PODCASTS.ORIGIN_LOGIN_NAME,"+    // 09
    "PODCASTS.ORIGIN_STATION,"+       // 10
    "PODCASTS.ORIGIN_DATETIME,"+      // 11
    "PODCASTS.SHA1_HASH,"+            // 12
    "FEED_IMAGES.DATA "+              // 13
    "from PODCASTS left join FEEDS "+
    "on PODCASTS.FEED_ID=FEEDS.ID left join FEED_IMAGES "+
    "on PODCASTS.ITEM_IMAGE_ID=FEED_IMAGES.ID ";

    return sql;
}