#include <QDragEnterEvent>
#include <QDropEvent>
#include <QKeyEvent>
#include <QPaintEvent>
#include <QStyle>
#include <QStyleOption>
#include <QMimeData>
#include <QPainter>
#include <QAction>
#include <QFileInfo>
#include <QFileDialog>
#include <QMenu>

#include "filedropwidget.h"
#include "playlistentrydialog.h"
#include "../ui_qt.h"

#ifndef CXX_BUILD
extern "C" {
#endif

#include "../../../file_path_special.h"
#include "../../../configuration.h"
#include "../../../msg_hash.h"

#ifndef CXX_BUILD
}
#endif

FileDropWidget::FileDropWidget(QWidget *parent) :
   QStackedWidget(parent)
{
   setAcceptDrops(true);
}

void FileDropWidget::paintEvent(QPaintEvent *event)
{
   QStyleOption o;
   QPainter p;
   o.initFrom(this);
   p.begin(this);
   style()->drawPrimitive(
      QStyle::PE_Widget, &o, &p, this);
   p.end();

   QWidget::paintEvent(event);
}

void FileDropWidget::keyPressEvent(QKeyEvent *event)
{
   if (event->key() == Qt::Key_Return || event->key() == Qt::Key_Enter)
   {
      event->accept();
      emit enterPressed();
   }
   else if (event->key() == Qt::Key_Delete)
   {
      event->accept();
      emit deletePressed();
   }
   else
      QWidget::keyPressEvent(event);
}

void FileDropWidget::dragEnterEvent(QDragEnterEvent *event)
{
   const QMimeData *data = event->mimeData();

   if (data->hasUrls())
      event->acceptProposedAction();
}

/* Workaround for QTBUG-72844. Without it, you can't drop on this if you first drag over another widget that doesn't accept drops. */
void FileDropWidget::dragMoveEvent(QDragMoveEvent *event)
{
   event->acceptProposedAction();
}

void FileDropWidget::dropEvent(QDropEvent *event)
{
   const QMimeData *data = event->mimeData();

   if (data->hasUrls())
   {
      QList<QUrl> urls = data->urls();
      QStringList files;
      int i;

      for (i = 0; i < urls.count(); i++)
      {
         QString path(urls.at(i).toLocalFile());

         files.append(path);
      }

      emit filesDropped(files);
   }
}

void MainWindow::onFileDropWidgetContextMenuRequested(const QPoint &pos)
{
   QScopedPointer<QMenu> menu;
   QScopedPointer<QAction> downloadThumbnailAction;
   QScopedPointer<QAction> addEntryAction;
   QScopedPointer<QAction> addFilesAction;
   QScopedPointer<QAction> addFolderAction;
   QScopedPointer<QAction> editAction;
   QScopedPointer<QAction> deleteAction;
   QPointer<QAction> selectedAction;
   QPoint                    cursorPos = QCursor::pos();
   QHash<QString, QString> contentHash = getCurrentContentHash();
   bool                specialPlaylist = currentPlaylistIsSpecial();
   bool                    allPlaylist = currentPlaylistIsAll();
   bool                   actionsAdded = false;

   menu.reset(new QMenu(this));

   if (!specialPlaylist)
   {
      downloadThumbnailAction.reset(new QAction(QString(msg_hash_to_str(MENU_ENUM_LABEL_VALUE_QT_DOWNLOAD_THUMBNAIL)), this));
      menu->addAction(downloadThumbnailAction.data());
   }

   if (!allPlaylist)
   {
      addEntryAction.reset(new QAction(QString(msg_hash_to_str(MENU_ENUM_LABEL_VALUE_QT_ADD_ENTRY)), this));
      menu->addAction(addEntryAction.data());

      addFilesAction.reset(new QAction(QString(msg_hash_to_str(MENU_ENUM_LABEL_VALUE_QT_ADD_FILES)), this));
      menu->addAction(addFilesAction.data());

      addFolderAction.reset(new QAction(QString(msg_hash_to_str(MENU_ENUM_LABEL_VALUE_QT_ADD_FOLDER)), this));
      menu->addAction(addFolderAction.data());

      editAction.reset(new QAction(QString(msg_hash_to_str(MENU_ENUM_LABEL_VALUE_QT_EDIT)), this));
      deleteAction.reset(new QAction(QString(msg_hash_to_str(MENU_ENUM_LABEL_VALUE_QT_DELETE)), this));

      if (!contentHash.isEmpty())
      {
         menu->addAction(editAction.data());
         menu->addAction(deleteAction.data());
      }

      actionsAdded = true;
   }

   if (actionsAdded)
      selectedAction = menu->exec(cursorPos);

   if (!selectedAction)
      return;

   if (!specialPlaylist)
   {
      if (selectedAction == downloadThumbnailAction.data())
      {
         QHash<QString, QString> hash = getCurrentContentHash();
         QString system = QFileInfo(getCurrentPlaylistPath()).completeBaseName();
         QString title = hash.value("label");

         if (!title.isEmpty())
         {
            if (m_pendingThumbnailDownloadTypes.isEmpty())
            {
               m_pendingThumbnailDownloadTypes.append(THUMBNAIL_BOXART);
               m_pendingThumbnailDownloadTypes.append(THUMBNAIL_SCREENSHOT);
               m_pendingThumbnailDownloadTypes.append(THUMBNAIL_TITLE);
               downloadThumbnail(system, title);
            }
            else
            {
               showMessageBox(msg_hash_to_str(MENU_ENUM_LABEL_VALUE_QT_DOWNLOAD_ALREADY_IN_PROGRESS), MainWindow::MSGBOX_TYPE_ERROR, Qt::ApplicationModal, false);
            }
         }
      }
   }

   if (!allPlaylist)
   {
      if (selectedAction == addFilesAction.data())
      {
         QStringList filePaths = QFileDialog::getOpenFileNames(
               this,
               msg_hash_to_str(MENU_ENUM_LABEL_VALUE_QT_SELECT_FILES));

         if (!filePaths.isEmpty())
            addFilesToPlaylist(filePaths);
      }
      else if (selectedAction == addEntryAction.data())
         addFilesToPlaylist(QStringList());
      else if (selectedAction == addFolderAction.data())
      {
         QString dirPath = QFileDialog::getExistingDirectory(
               this,
               msg_hash_to_str(MENU_ENUM_LABEL_VALUE_QT_SELECT_FOLDER),
               QString(), QFileDialog::ShowDirsOnly);

         if (!dirPath.isEmpty())
            addFilesToPlaylist(QStringList() << dirPath);
      }
      else if (selectedAction == editAction.data())
      {
         QString selectedDatabase;
         QString selectedName;
         QString selectedPath;
         QHash<QString, QString> selectedCore;
         PlaylistEntryDialog *playlistDialog = playlistEntryDialog();
         QString         currentPlaylistPath = getCurrentPlaylistPath();

         if (!playlistDialog->showDialog(contentHash))
            return;

         selectedName     = m_playlistEntryDialog->getSelectedName();
         selectedPath     = m_playlistEntryDialog->getSelectedPath();
         selectedCore     = m_playlistEntryDialog->getSelectedCore();
         selectedDatabase = m_playlistEntryDialog->getSelectedDatabase();

         if (selectedCore.isEmpty())
         {
            selectedCore["core_name"] = "DETECT";
            selectedCore["core_path"] = "DETECT";
         }

         if (selectedDatabase.isEmpty())
            selectedDatabase = QFileInfo(currentPlaylistPath).fileName().remove(file_path_str(FILE_PATH_LPL_EXTENSION));

         contentHash["label"]     = selectedName;
         contentHash["path"]      = selectedPath;
         contentHash["core_name"] = selectedCore.value("core_name");
         contentHash["core_path"] = selectedCore.value("core_path");
         contentHash["db_name"]   = selectedDatabase;

         if (!updateCurrentPlaylistEntry(contentHash))
         {
            showMessageBox(msg_hash_to_str(MENU_ENUM_LABEL_VALUE_QT_COULD_NOT_UPDATE_PLAYLIST_ENTRY), MainWindow::MSGBOX_TYPE_ERROR, Qt::ApplicationModal, false);
            return;
         }
      }
      else if (selectedAction == deleteAction.data())
         deleteCurrentPlaylistItem();
   }
}