#include "folderlistwidget.h"
#include <QDragEnterEvent>
#include <QMimeData>
#include <QDebug>
#include <QDrag>
#include <QApplication>
#include <QMap>
#include <QVariant>
#include <QDir>

FolderListWidget::FolderListWidget(QWidget *parent) : QListWidget(parent)
{
  this->setSelectionMode(QAbstractItemView::ExtendedSelection);
  this->setAcceptDrops(true);
  this->setDragEnabled(true);
  this->setDragDropMode(QAbstractItemView::DragDrop);
  this->setDefaultDropAction(Qt::MoveAction);
  this->p_mainWin=NULL;
  this->p_path="";
}

FolderListWidget::~FolderListWidget()
{

}

bool FolderListWidget::contains(const QString &name)
{
  for(int i=0;i<this->count();i++)
    {
      if(this->item(i)->text()==name)
        return true;
    }
  return false;
}

bool FolderListWidget::isDraging(const QString &name)
{
  for(int i=0;i<this->lastDragItems.count();i++)
    {
      if(lastDragItems.at(i)==name)
        return true;
    }
  return false;
}

void FolderListWidget::setMainWindow(MainWindow *mw)
{
  this->p_mainWin = mw;
}

void FolderListWidget::setPath(const QString &path)
{
  this->p_path = path;
  this->lastDragItems.clear();
}

void FolderListWidget::dragEnterEvent(QDragEnterEvent *event)
{
  const QMimeData *mimeData = event->mimeData();
  QStringList mimeFormats = mimeData->formats();
  bool containsFile=false;
  if(mimeFormats.count())
    {
      QByteArray encoded = mimeData->data("application/x-qabstractitemmodeldatalist");
      QDataStream stream(&encoded, QIODevice::ReadOnly);
      while (!stream.atEnd())
      {
          int row, col;
          QMap<int,  QVariant> roleDataMap;
          stream >> row >> col >> roleDataMap;
          if(this->contains(roleDataMap[0].toString()))
            containsFile = true;
      }
    }
  if(!containsFile)
    {
      QListWidget::dragEnterEvent(event);
    }
  else
    {
      this->lastDragItems.clear();
      QList<QListWidgetItem*> selItems = this->selectedItems();
      for(int i=0;i<selItems.count();i++)
        {
          lastDragItems.append(selItems.at(i)->text());
        }
    }

}

void FolderListWidget::dragMoveEvent(QDragMoveEvent *event)
{
  QListWidget::dragMoveEvent(event);
}

void FolderListWidget::dragLeaveEvent(QDragLeaveEvent *event)
{
  QListWidget::dragLeaveEvent(event);
  this->lastDragItems.clear();
}

void FolderListWidget::dropEvent(QDropEvent *event)
{
  QByteArray encoded = event->mimeData()->data("application/x-qabstractitemmodeldatalist");
  QDataStream stream(&encoded, QIODevice::ReadOnly);
  while (!stream.atEnd())
  {
      int row, col;
      QMap<int,  QVariant> roleDataMap;
      stream >> row >> col >> roleDataMap;
      QString name=roleDataMap[0].toString();
      QString oldPath = p_mainWin->getFilePath(name);
      if((oldPath!="") && (p_path!=""))
        {
          if(QFile::rename(oldPath+"/"+name,this->p_path+"/"+name))
            QListWidget::dropEvent(event);
          emit askGlobalRescan();
        }
  }
}

void FolderListWidget::mousePressEvent(QMouseEvent *event)
{
  QListWidget::mousePressEvent(event);
}

void FolderListWidget::mouseMoveEvent(QMouseEvent *event)
{
  QListWidget::mouseMoveEvent(event);
}