/**
 * @RDE_HEADER@
 * LtsDataView is the exported View, which contains and manages a Custom View and a Table View
 * $Id$
 * $HeadURL$
 * $Author$
 *
 * Created by Mike Wille, SLSE, 2016-06-15
 */
#pragma once


#include <LtsDataView/lts_data_view_export.h>
#include <LtsDataView/lts_columns_setting.h>

#include <QWidget>
#include <QAbstractItemView>
#include <QLineEdit>
#include <functional> 


class QListView;
class QTreeView;

namespace Ui
{
class LtsDataView;
}
namespace LtsWidgets
{
class LtsColumnFilterProxyModel;
struct ColumnOrganiserInfo;
}

// TODO: doxy doku

namespace LtsDataView
{
class AbstractDisplayWidget;
class SearchModel;


class SearchLineEdit final : public QLineEdit
{
  Q_OBJECT
public:
  explicit SearchLineEdit(QWidget *parent)
    : QLineEdit(parent)
  {
    setProperty("isSearchLineEdit", true);
  }
};


class LTSDATAVIEW_EXPORT LtsDataView : public QWidget
{
  Q_OBJECT

  Q_PROPERTY(bool rootIsDecorated READ rootIsDecorated WRITE setRootIsDecorated)
  Q_PROPERTY(bool showColumnCount READ showColumnCount WRITE setColumnCountVisible)
  Q_PROPERTY(bool toolButtonsVisible READ toolButtonsVisible WRITE setToolButtonsVisible)
  Q_PROPERTY(bool alternatingRowColors READ alternatingRowColors WRITE setAlternatingRowColors)
  Q_PROPERTY(bool allColumnsShowFocus READ allColumnsShowFocus WRITE setAllColumnsShowFocus)
  Q_PROPERTY(bool autoResizeToContent READ autoResizeToContent WRITE setAutoResizeToContent)
  Q_PROPERTY(QAbstractItemView::SelectionMode selectionMode READ selectionMode WRITE setSelectionMode)

public:
  enum Page
  {
    TABLE = 0,
    CUSTOM = 1,
  };

  explicit LtsDataView(QWidget *parent = nullptr);
  ~LtsDataView();

  /** once you set the model without a ADW, the view cannot switch back to double-view mode!
   *
   */
  void setModel(QAbstractItemModel *model, const std::function<AbstractDisplayWidget*()> &customDisplayWidgetCreator = nullptr);
  QAbstractItemModel *sourceModel() const;
  LtsWidgets::LtsColumnFilterProxyModel *proxyModel() const;
  QItemSelectionModel *selectionModel() const;
  SearchModel *searchModel() const;

  QTreeView *treeView();
  const QTreeView *treeView() const;
  QTreeView *searchView();
  const QTreeView *searchView() const;
  QListView *getCustomView();
  QWidget *customWidget() const;
  void setCustomWidget(QWidget *customWidget); // not visible in seamless mode

  QModelIndexList selectedRows(int column = 0) const; // TODO: returns indexes instead of rows if in custom view ... change naming?
  void selectRow(const QModelIndex &idxSource);
  void clearSelection();
  void setSelectionMode(QAbstractItemView::SelectionMode selectionMode);
  QAbstractItemView::SelectionMode selectionMode() const;
  QModelIndex currentIndex() const;
  void setCurrentIndex(const QModelIndex &idx); // also makes sure that the current index is visible (QAIV::scrollTo())
  void scrollTo(const QModelIndex &idxSource);

  void moveSection(int from, int to);
  void seamless();

  void setViewHeaderMovable(bool state);
  void moveSections(const QMap<int, int> &list);  /// logicalIndex (key) visualIndex(value)

  void saveTableSettings(bool defaultSetting = false);/// if defaultSetting true, the default order of the table will be restore and save
  bool restoreTableSettings();
  QString getOperatorColIdentifier() const;
  QVector<ColumnOrganiserInfo> getColumnOrganiserSetting();
  QString columnOrganiserGroup() const;
  void setColumnViewFromSetting();
  void setColumnsOrganiserEnabled(const QString &tableIdentifier, bool enable = false);

  void setRootIsDecorated(bool isDecorated);
  bool rootIsDecorated() const;
  void setAlternatingRowColors(bool enable);
  bool alternatingRowColors() const;

  void setColumnCountVisible(bool bVisible);
  bool showColumnCount() const;
  void setToolButtonsVisible(bool bVisible);
  bool toolButtonsVisible() const;
  void setAllColumnsShowFocus(bool enable);
  bool allColumnsShowFocus() const;
  void hideColumn(int column, bool debugMode = false);
  void showColumn(int column);
  bool isColumnHidden(int column) const;
  void setColumnHidden(int column, bool hide);

  void setAutoResizeToContent(bool enable);
  bool autoResizeToContent() const;
  void resizeSection(int logicalIndex, int size);
  void resizeHeadersByContent();
  void resizeColumnsToContent();
  void syncSearchHeaderAndTableContentColumnSize();
  void setRootIndex(const QModelIndex &srcIndex);

  /**
   * @brief See QHeaderview::setSortIndicator
   */
  void setSortIndicator(int logicalIndex, Qt::SortOrder order);
  void setSortIndicatorShown(bool show = true);

  Qt::ContextMenuPolicy contextMenuPolicyPerView(Page page) const;
  void setContextMenuPolicyPerView(Page page, Qt::ContextMenuPolicy policy);

  QModelIndex mapFromSource(const QModelIndex &mi) const;
  QModelIndex mapToSource(const QModelIndex &mi) const;
  QModelIndexList mapToSource(const QModelIndexList &mil) const;
  QItemSelection mapSelectionToSource(const QItemSelection &is) const;

  bool setInitialSearchContent(int section, const QVariant &filterData);
  void setIconSize(const QSize &size);

  QByteArray saveState() const;
  bool restoreState(const QByteArray &headerState);

private:
  Ui::LtsDataView *m_ui;
  LtsWidgets::LtsColumnFilterProxyModel *m_columnFilterProxy;
  SearchModel *m_searchModel;
  bool m_bOwnProxy;
  bool m_autoResizeToConent{true};
  QString m_tableObjIdentifier; // identifier for column Organiser
  bool m_userChangedColumnPos = false;
  QSet<int> m_DebugModeColIds; /// column which are only visible in debug mode

  QString createCsv() const;
  void addTouchScroll(QWidget *widget);
  QAbstractItemView *currentView() const;

protected:
  void keyPressEvent(QKeyEvent *event) override;

public slots:
  void selectTableView();
  void selectCustomView();
  void selectView(Page page);
  void slotCopyToClipboard();
  void collapseAll();
  void expandAll();
  void expand(const QModelIndex &index);
  void setSortingEnabled(bool enable);
  void slotSetHorizontalRange(int, int);
  void updateColumnsVisibility(const QVector<ColumnOrganiserInfo> &data);
  void slotSetColumnsDefaultOrder();
private slots:
  void slotSetSortIndicator(int logicalIndex, Qt::SortOrder order);
  void slotRowCountChanged();
  void slotSetHorizontalValue(int);
  void slotSetVerticalRange(int x = 0, int y = 0);
  void slotSetVerticalValue(int);
  void slotSectionResized(int, int, int);
  void slotHeaderMoved(int, int, int);
  void slotCsvExport();
  void slotResizeColumn(int columnIndex);
  void onCustomContextMenuRequested(const QPoint &pos);
  void slotColumnOrganiserDialog();


signals:
  void signalEnterPressed();
  void signalEntered(const QModelIndex &index);

  // These are only emitted from the TableView
  void clicked(const QModelIndex &index);
  void doubleClicked(const QModelIndex &index);
  void selectionChanged(const QItemSelection &selected, const QItemSelection &deselected);
  void activated(const QModelIndex &index);

  // These are emitted from both
  void signalSelectionChanged();
  void signalDoubleClicked();
  // signalContextMenuRequested requires setContextMenuPolicyPerView to be set
  void signalContextMenuRequested(const QPoint &globalPos, const QModelIndex &indexSrc);

  // custom signals (@Filip)
  void filterChanged();
  void sortOrderChanged(const int &column, const Qt::SortOrder &order);

};
} // namespace LtsDataView