/*
 * Copyright (c) 2013-2025 Meltytech, LLC
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * 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, see <http://www.gnu.org/licenses/>.
 */

#ifndef TIMELINEDOCK_H
#define TIMELINEDOCK_H

#include "jobs/ffmpegjob.h"
#include "models/markersmodel.h"
#include "models/multitrackmodel.h"
#include "models/subtitlesmodel.h"
#include "models/subtitlesselectionmodel.h"
#include "sharedframe.h"

#include <QApplication>
#include <QDateTime>
#include <QDockWidget>
#include <QQuickWidget>
#include <QTimer>

namespace Timeline {
class UpdateCommand;
class TrimCommand;
} // namespace Timeline
class UndoHelper;
class QMenu;

class TimelineDock : public QDockWidget
{
    Q_OBJECT
    Q_PROPERTY(int position READ position WRITE setPosition NOTIFY positionChanged)
    Q_PROPERTY(int currentTrack READ currentTrack WRITE setCurrentTrack NOTIFY currentTrackChanged)
    Q_PROPERTY(
        QVariantList selection READ selectionForJS WRITE setSelectionFromJS NOTIFY selectionChanged)
    Q_PROPERTY(bool isRecording READ isRecording NOTIFY isRecordingChanged)
    Q_PROPERTY(int loopStart READ loopStart NOTIFY loopChanged)
    Q_PROPERTY(int loopEnd READ loopEnd NOTIFY loopChanged)

public:
    explicit TimelineDock(QWidget *parent = 0);
    ~TimelineDock();

    enum TrimLocation { TrimInPoint, TrimOutPoint };

    MultitrackModel *model() { return &m_model; }
    MarkersModel *markersModel() { return &m_markersModel; }
    SubtitlesModel *subtitlesModel() { return &m_subtitlesModel; }
    SubtitlesSelectionModel *subtitlesSelectionModel() { return &m_subtitlesSelectionModel; }
    int position() const { return m_position; }
    void setPosition(int position);
    Mlt::Producer producerForClip(int trackIndex, int clipIndex);
    int clipIndexAtPlayhead(int trackIndex = -1);
    int clipIndexAtPosition(int trackIndex, int position);
    void chooseClipAtPosition(int position, int &trackIndex, int &clipIndex);
    void setCurrentTrack(int currentTrack);
    int currentTrack() const;
    int clipCount(int trackIndex) const;
    void setSelectionFromJS(const QVariantList &list);
    void setSelection(QList<QPoint> selection = QList<QPoint>(),
                      int trackIndex = -1,
                      bool isMultitrack = false);
    QVariantList selectionForJS() const;
    const QList<QPoint> selection() const;
    const QVector<QUuid> selectionUuids();
    const QList<QPoint> uuidsToSelection(QVector<QUuid> uuids) const;
    void saveAndClearSelection();
    Q_INVOKABLE void restoreSelection();
    Q_INVOKABLE QVariantList getGroupForClip(int trackIndex, int clipIndex);
    void selectClipUnderPlayhead();
    int centerOfClip(int trackIndex, int clipIndex);
    bool isTrackLocked(int trackIndex) const;
    void trimClipAtPlayhead(TrimLocation location, bool ripple);
    Q_INVOKABLE bool isMultitrackSelected() const { return m_selection.isMultitrackSelected; }
    Q_INVOKABLE int selectedTrack() const { return m_selection.selectedTrack; }
    Q_INVOKABLE bool isFloating() const { return QDockWidget::isFloating(); }
    Q_INVOKABLE static void openProperties();
    void emitSelectedChanged(const QVector<int> &roles);
    void replaceClipsWithHash(const QString &hash, Mlt::Producer &producer);
    Q_INVOKABLE void recordAudio();
    Q_INVOKABLE void stopRecording();
    bool isRecording() const { return m_isRecording; }
    int addTrackIfNeeded(TrackType trackType);
    void getSelectionRange(int *start, int *end);
    int loopStart() const { return m_loopStart; }
    int loopEnd() const { return m_loopEnd; }

signals:
    void currentTrackChanged();
    void selectionChanged();
    void seeked(int position);
    void positionChanged(int position);
    void loopChanged();
    void clipOpened(Mlt::Producer *producer);
    void dragging(const QPointF &pos, int duration);
    void dropped();
    void dropAccepted(const QString &xml);
    void gainChanged(double gain);
    void fadeInChanged(int duration);
    void fadeOutChanged(int duration);
    void selected(Mlt::Producer *producer);
    void clipClicked();
    void showStatusMessage(QString);
    void clipCopied();
    void clipMoved(int fromTrack, int toTrack, int clipIndex, int position, bool ripple);
    void filteredClicked();
    void durationChanged();
    void transitionAdded(int trackIndex, int clipIndex, int position, bool ripple);
    void zoomIn();
    void zoomOut();
    void zoomToFit();
    void setZoom(double value);
    void markerRangesChanged();
    void markerSeeked(int markerIndex);
    void isRecordingChanged(bool);
    void multitrackSelected();
    void warnTrackLocked(int trackIndex);
    void refreshWaveforms();
    void updateThumbnails(int trackIndex, int clipIndex);
    void trimStarted();
    void trimEnded();

public slots:
    int addAudioTrack();
    int addVideoTrack();
    void alignSelectedClips();
    void onShowFrame(const SharedFrame &frame);
    void onSeeked(int position);
    void append(int trackIndex);
    void remove(int trackIndex, int clipIndex, bool ignoreTransition = false);
    bool mergeClipWithNext(int trackIndex, int clipIndex, bool dryrun);
    void lift(int trackIndex, int clipIndex, bool ignoreTransition = false);
    void removeSelection(bool withCopy = false);
    void liftSelection();
    void incrementCurrentTrack(int by);
    void selectTrackHead(int trackIndex);
    void selectMultitrack();
    void copy(int trackIndex, int clipIndex);
    void setTrackName(int trackIndex, const QString &value);
    void toggleTrackMute(int trackIndex);
    void toggleTrackHidden(int trackIndex);
    void setTrackComposite(int trackIndex, bool composite);
    void setTrackLock(int trackIndex, bool lock);
    bool moveClip(int fromTrack, int toTrack, int clipIndex, int position, bool ripple);
    void onClipMoved(int fromTrack, int toTrack, int clipIndex, int position, bool ripple);
    bool trimClipIn(
        int trackIndex, int clipIndex, int oldClipIndex, int delta, bool ripple, bool roll);
    bool trimClipOut(int trackIndex, int clipIndex, int delta, bool ripple, bool roll);
    void insert(int trackIndex, int position = -1, const QString &xml = QString(), bool seek = true);
    void overwrite(int trackIndex,
                   int position = -1,
                   const QString &xml = QString(),
                   bool seek = true);
    void appendFromPlaylist(Mlt::Playlist *playlist, bool skipProxy, bool emptyTrack);
    bool changeGain(int trackIndex, int clipIndex, double gain);
    void fadeIn(int trackIndex, int clipIndex = -1, int duration = -1);
    void fadeOut(int trackIndex, int clipIndex = -1, int duration = -1);
    void seekPreviousEdit();
    void seekNextEdit();
    void seekInPoint(int clipIndex);
    void clearSelectionIfInvalid();
    void insertTrack();
    void insertAudioTrack();
    void insertVideoTrack();
    void removeTrack();
    void moveTrack(int fromTrackIndex, int toTrackIndex);
    void moveTrackUp();
    void moveTrackDown();
    void onProducerChanged(Mlt::Producer *);
    void emitSelectedFromSelection();
    void remakeAudioLevels(int trackIndex, int clipIndex, bool force = true);
    void commitTrimCommand();
    void onRowsInserted(const QModelIndex &parent, int first, int last);
    void onRowsRemoved(const QModelIndex &parent, int first, int last);
    void onRowsMoved(
        const QModelIndex &parent, int start, int end, const QModelIndex &destination, int row);
    void detachAudio(int trackIndex, int clipIndex);
    void selectAll();
    void selectAllOnCurrentTrack();
    void onProducerModified();
    void replace(int trackIndex, int clipIndex, const QString &xml = QString());
    void createOrEditMarker();
    void createOrEditSelectionMarker();
    void createMarker();
    void editMarker(int markerIndex);
    void deleteMarker(int markerIndex = -1);
    void seekNextMarker();
    void seekPrevMarker();
    void onFilterModelChanged();
    void trimClipIn(bool ripple = false);
    void trimClipOut(bool ripple = false);
    void initLoad();
    void handleDrop(int trackIndex, int position, QString xml);
    void onLoopChanged(int start, int end);

protected:
    void dragEnterEvent(QDragEnterEvent *event);
    void dragMoveEvent(QDragMoveEvent *event);
    void dragLeaveEvent(QDragLeaveEvent *event);
    void dropEvent(QDropEvent *event);
    bool event(QEvent *event);
    void keyPressEvent(QKeyEvent *event);
    void keyReleaseEvent(QKeyEvent *event);

private:
    bool isBlank(int trackIndex, int clipIndex);
    bool clipsAreSelected();
    bool blankIsSelected();
    bool nothingIsSelected();
    bool isTransition(int trackIndex, int clipIndex);
    bool isEmptyTrack(Mlt::Playlist &playlist);
    void emitNonSeekableWarning();
    void addTrackIfNeeded(int mltTrackIndex, Mlt::Producer *srcTrack);
    void setupActions();
    bool isMultitrackValid() { return m_model.tractor() && !m_model.trackList().empty(); }
    void reportSelectionChange();
    void applyCopiedFiltersToSelectdClips();
    void insertOrOverwriteDrop(int trackIndex, int position, const QString &xml);
    void freezeFrame();
    void addGenerator(QWidget *widget);

    QQuickWidget m_quickView;
    MultitrackModel m_model;
    MarkersModel m_markersModel;
    SubtitlesModel m_subtitlesModel;
    SubtitlesSelectionModel m_subtitlesSelectionModel;
    int m_position{-1};
    std::unique_ptr<Timeline::UpdateCommand> m_updateCommand;
    bool m_ignoreNextPositionChange{false};
    struct Selection
    {
        QList<QPoint> selectedClips; // x is the clip index, y is the track index
        int selectedTrack;
        bool isMultitrackSelected;
    };
    Selection m_selection;
    int m_savedSelectedTrack{-1};
    bool m_savedIsMultitrackSelected{false};
    QVector<QUuid> m_savedSelectionUuids;
    QTimer m_selectionSignalTimer;
    std::unique_ptr<Timeline::TrimCommand> m_trimCommand;
    std::unique_ptr<UndoHelper> m_undoHelper;
    int m_trimDelta{0};
    int m_transitionDelta{0};
    bool m_isRecording{false};
    std::unique_ptr<AbstractJob> m_recordJob;
    QTimer m_recordingTimer;
    QDateTime m_recordingTime;
    int m_recordingTrackIndex{-1};
    int m_recordingClipIndex{-1};
    int m_currentTrack{0};
    QMenu *m_mainMenu{nullptr};
    QMenu *m_clipMenu{nullptr};
    int m_loopStart{-1};
    int m_loopEnd{-1};

private slots:
    void load(bool force);
    void onTopLevelChanged(bool floating);
    void onTransitionAdded(int trackIndex, int clipIndex, int position, bool ripple);
    void selectClip(int trackIndex, int clipIndex);
    void onMultitrackClosed();
    void reloadTimelineModels();
    void onRecordStarted();
    void updateRecording();
    void onRecordFinished(AbstractJob *, bool);
    void onWarnTrackLocked();
    void onTimelineRightClicked();
    void onClipRightClicked();
    void onNoMoreEmptyTracks(bool isAudio);
    void addGenerator();
};

#endif // TIMELINEDOCK_H
