#pragma once

#include <LtsScriptTimeline/ltsscripttimeline_export.h>

#include <QWidget>


namespace LtsScriptTimeline
{
class TrackEntry;
enum class TrackEntryType;
class TrackWidget;
class ScriptTimeline;
class Tools;
class DragHandler;
class ResizeHandler;
class SelectHandler;

LTSSCRIPTTIMELINE_EXPORT QDataStream &operator<<(QDataStream &ds, const TrackEntry &te);
LTSSCRIPTTIMELINE_EXPORT QDataStream &operator>>(QDataStream &ds, TrackEntry &te);
LTSSCRIPTTIMELINE_EXPORT bool isCollision(int start_s, int end_s, int toCompare_start_s, int toCompare_end_s);
LTSSCRIPTTIMELINE_EXPORT bool isCollision2(int startPreview_s, int endPreview_s, const TrackEntry *pTrackEntry);

class LTSSCRIPTTIMELINE_EXPORT TrackContentWidget : public QWidget
{
  Q_OBJECT

public:
  explicit TrackContentWidget(QWidget *parent = nullptr, bool isFilter = false, Tools *tools = nullptr, int mainTopicId = -1);
  ~TrackContentWidget() override;

  bool addTrackEntry(TrackEntry *te, bool selectTrackEntry);
  void removeTrackEntryByTopicId(TrackEntry *te);

  void selectAll();
  void unselectAll();
  const QVector<TrackEntry *> &getTrackEntries() const { return m_entryList; }
  const QVector<TrackEntry *> &getSelectedEntries() const { return m_selected; }
  void setIndicatorTime(int time);
  void setTrackName(const QString &trackName);
  void deleteSelectedTopics();
  void selectEntry(int topicId);
  void setTopicFilterId(int id) { m_topicFilterId = id; }
  int topicFilterId() const { return m_topicFilterId; }
  void setReadonly(bool readonly);
  void addAllowedType(const TrackEntryType &tet) { m_allowedTypes.append(tet); }
  void addDisallowedType(const TrackEntryType &tet) { m_disallowedTypes.append(tet); }
  void setTrackWidget(TrackWidget *trackWidget);
  void setScriptTimeline(ScriptTimeline *scriptTimeline) { m_scriptTimeline = scriptTimeline; }
  void setTools(Tools *tools);
  void addCorrespondingTrackWidget(TrackContentWidget *pCorrespondingTrackWidget);
  static QString parallelError();
  bool isMultiLineMultiSelectionMode() const { return m_isMultiLineMultiSelectionMode; }
  void setMultiLineMultiSelectionMode(bool active) { m_isMultiLineMultiSelectionMode = active; }
  bool isDragPossible() const { return (!m_isMultiLineMultiSelectionMode || m_dragPossible); }
  void selectEntriesAtPositions(int fromPos, int toPos);
  void forceLocalUnselect();

  static bool checkForParallelTopics(const TrackContentWidget *pTCW, const QVector<TrackEntry *> &vecPreviewTrackEntries, int dropTime_s, bool hack = false);
  static bool checkForParallelTopics(const TrackContentWidget *tcw, const QVector<TrackEntry *> &preview, int dropTime_s, QVector<TrackEntry *> &vecParallelTopics, bool ignoreSelectedTopics = false, bool hack = false);
  static bool checkForCollisions(const TrackContentWidget *tcw, const QVector<TrackEntry *> &preview, int dropTime_s,
                                 QVector<TrackEntry *> &vecCollisions, bool ignoreSelected = false, bool ignoreSelfCheck = false);
  static bool checkForCollisions(const TrackContentWidget *pTCW, const QVector<TrackEntry *> &vecPreviewTrackEntries, int dropTime_s);
  bool checkForCollisionsSimple(const TrackEntry &previewEntry) const;

  QByteArray selectedItemsToData(int dragPosTime = 0, bool calculateFirstTeTime = true);
  static QByteArray itemsToData(const QVector<TrackEntry *> &items, int dragPosTime = 0, bool calculateFirstTeTime = true);
  static QVector<TrackEntry *> dataToItems(const QByteArray &data, int &offset);
  bool canPasteTopics(const QVector<TrackEntry *> &topics, int offsetTime, int pasteTime) const;
  void forcePasteTopics(const QVector<TrackEntry *> &topics, int offsetTime, int pasteTime);
  bool canMoveAll(int offset) const;
  void forceMoveAll(int offset);
  bool setDescriptionForSelected();

  static QString mime;

  void dragEnd();
  void setDragPossible(bool possible);
  void dragLeave();
  bool dragEnter(const QByteArray &itemData);
  bool dragMove(int pos);
  bool dragDrop(int pos);
  void clearDrag();
  int getDropPos() const;

  TrackWidget *trackWidget() { return m_trackWidget; }
  TrackEntry *trackEntryAtPos(int x) const;

  void keyPressEvent(QKeyEvent *event) override;

protected:
  void paintEvent(QPaintEvent *event) override;
  void dragEnterEvent(QDragEnterEvent *event) override;
  void dragLeaveEvent(QDragLeaveEvent *event) override;
  void dropEvent(QDropEvent *event) override;
  void dragMoveEvent(QDragMoveEvent *event) override;
  void resizeEvent(QResizeEvent *event) override;
  void mousePressEvent(QMouseEvent *event) override;
  void mouseMoveEvent(QMouseEvent *event) override;
  void mouseReleaseEvent(QMouseEvent *event) override;
  void mouseDoubleClickEvent(QMouseEvent *event) override;

private:
  TrackEntry *getTrackEntryOnPos(QPoint globalPos);
  bool allowedByType(const TrackEntry *te) const;
  TrackEntry *getParentTopicOfFilter(TrackEntry *filterTe) const;

  int m_topicFilterId = -1; // only for filter content widgets!

  friend class SelectHandler;
  SelectHandler *m_selectHandler;

  friend class ResizeHandler;
  ResizeHandler *m_resizeHandler;

  friend class DragHandler;
  DragHandler *m_dragHandler;

  //void addSelectEntry(TrackEntry *te);
  void selectEntry(TrackEntry *te);
  void addFilterType(const TrackEntryType &tet);
  void unselect();
  void moveAll(int offset);
  bool handleResize(int cursorTime, bool leftButton);
  bool handleDrag(int cursorTime, bool leftButton);
  void cancelResize();
  TrackEntry *getTrackEntryAt(int clickedTime);
  void clearPreview();
  int dragPos() const { return m_dragPos; }
  //QPoint getDragStartPos() const { return ((m_dragHandler == nullptr) ? QPoint() : m_dragHandler->m_dragStartPos); }


  int m_dragOffsetTime;
  int m_dragPos;
  QVector<TrackEntry *> m_entryList;
  QVector<TrackEntry *> m_selected;
  //QVector<TrackEntry *> m_toCopy;
  TrackEntry *m_mainSelected;
  QVector<TrackEntry *> m_preview;
  int m_width;
  bool m_cursorSet;
  int m_oldEntryLength;
  bool m_unselectAllImmune;
  int m_indicatorTime;
  QString m_trackName;
  QVector<TrackEntryType> m_allowedTypes;
  QVector<TrackEntryType> m_disallowedTypes;
  bool m_isFilter;
  bool m_readonly;
  TrackWidget *m_trackWidget; // important for getting and adding track entries WITH filters !
  ScriptTimeline *m_scriptTimeline;
  Tools *m_tools;
  QVector<TrackContentWidget *> m_tcwCorresponding;
  bool m_isMultiLineMultiSelectionMode;
  bool m_multiLineMultiSelectionOkay;
  bool m_dragPossible;
  bool m_moveValid;
  int m_mainTopicId;

signals:
  void signalUnselectAll();
  void signalTrackEntrySelectionChanged(TrackEntry *); // parameter deprecated! unused!
  void signalChangesMade();
  void signalTrackEntryAdded(TrackEntry *te);
  void signalTrackEntryDeleted(const int topicId);
  void signalEditEntry(const int topicId);
  void signalMultiLineMultiSelectionFailed();
  void signalMultiLineMultiSelectionOkay();
  void signalMultiLineMultiSelectionDone(int dropPos);
  void signalMultiLineMultiSelectionStart(int dragPosTime);
  void signalMultiLineMultiSelectionMove(int x);
  void signalStartRubberband(QPoint pos);
  void signalStopRubberband();
  void signalEscapeRubberband();
  void signalModifyRubberband();
  void signalSelectAllGlobal();
  void signalCopyTopics();
  void signalPasteTopics();
  void signalCutTopics();
  void signalDeleteSelectedTopics();
  void signalSave();
  void signalMoveAll(int offset);
  void signalScroll(int incr);
};

} // namespace LtsScriptTimeline