/*
  Q Light Controller Plus
  contextmanager.h

  Copyright (c) Massimo Callegari

  Licensed under the Apache License, Version 2.0 (the "License");
  you may not use this file except in compliance with the License.
  You may obtain a copy of the License at

      http://www.apache.org/licenses/LICENSE-2.0.txt

  Unless required by applicable law or agreed to in writing, software
  distributed under the License is distributed on an "AS IS" BASIS,
  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  See the License for the specific language governing permissions and
  limitations under the License.
*/

#ifndef CONTEXTMANAGER_H
#define CONTEXTMANAGER_H

#include <QObject>
#include <QQuickView>
#include <QVector3D>

#include "qlcchannel.h"
#include "scenevalue.h"

class Doc;
class MainView2D;
class MainView3D;
class MainViewDMX;
class FixtureManager;
class FunctionManager;
class GenericDMXSource;
class MonitorProperties;
class PreviewContext;
class SimpleDesk;

class ContextManager : public QObject
{
    Q_OBJECT

    Q_PROPERTY(QString currentContext READ currentContext NOTIFY currentContextChanged)
    Q_PROPERTY(QVector3D environmentSize READ environmentSize WRITE setEnvironmentSize NOTIFY environmentSizeChanged)
    Q_PROPERTY(quint32 universeFilter READ universeFilter WRITE setUniverseFilter NOTIFY universeFilterChanged)
    Q_PROPERTY(int selectedFixturesCount READ selectedFixturesCount NOTIFY selectedFixturesChanged)
    Q_PROPERTY(QVector3D fixturesPosition READ fixturesPosition WRITE setFixturesPosition NOTIFY fixturesPositionChanged)
    Q_PROPERTY(QVector3D fixturesRotation READ fixturesRotation WRITE setFixturesRotation NOTIFY fixturesRotationChanged)
    Q_PROPERTY(int dumpValuesCount READ dumpValuesCount NOTIFY dumpValuesCountChanged)
    Q_PROPERTY(quint32 dumpChannelMask READ dumpChannelMask NOTIFY dumpChannelMaskChanged)
    Q_PROPERTY(bool multipleSelection READ multipleSelection WRITE setMultipleSelection NOTIFY multipleSelectionChanged)
    Q_PROPERTY(bool positionPicking READ positionPicking WRITE setPositionPicking NOTIFY positionPickingChanged)

public:
    explicit ContextManager(QQuickView *view, Doc *doc,
                            FixtureManager *fxMgr, FunctionManager *funcMgr,
                            QObject *parent = 0);
    ~ContextManager();

    /** Register/Unregister a context to the map of known contexts */
    void registerContext(PreviewContext *context);
    void unregisterContext(QString name);

    /** Enable/disable the context with the specified $name.
     *  This sets a flag in the context to know if it is visible
     *  on the screen, so to decide if changes should be applied to it */
    Q_INVOKABLE void enableContext(QString name, bool enable, QQuickItem *item);

    /** Detach/Reattach a context from/to the application main window */
    Q_INVOKABLE void detachContext(QString name);
    Q_INVOKABLE void reattachContext(QString name);

    /** Switch to the context with the given $name.
     *  Supports both QLC+ 4 and QLC+ 5 context names */
    void switchToContext(QString name);

    /** Return the currently active context */
    QString currentContext() const;

    MainView2D *get2DView();
    MainView3D *get3DView();

    /** Get/Set the environment width/height/depth size */
    QVector3D environmentSize() const;
    void setEnvironmentSize(QVector3D environmentSize);

    /** Get/Set multiple item selection mode */
    bool multipleSelection() const;
    void setMultipleSelection(bool multipleSelection);

    /** Enable/Disable a position picking process */
    bool positionPicking() const;
    void setPositionPicking(bool enable);

    Q_INVOKABLE void setPositionPickPoint(QVector3D point);

signals:
    void currentContextChanged();
    void environmentSizeChanged();
    void positionPickingChanged();
    void multipleSelectionChanged();

public slots:
    /** Resets the data structures and update the currently enabled views */
    void resetContexts();

    /** Handle a key press from a QQuickView context */
    void handleKeyPress(QKeyEvent *e);

    /** Handle a key release from a QQuickView context */
    void handleKeyRelease(QKeyEvent *e);

private:
    /** Reference to the QML view root */
    QQuickView *m_view;
    /** Reference to the project workspace */
    Doc *m_doc;
    /** Reference to the Doc Monitor properties */
    MonitorProperties *m_monProps;

    /** Reference to a simple PreviewContext representing
     *  the universe grid view, since it doesn't have a dedicated class */
    PreviewContext *m_uniGridView;
    /** Reference to the DMX Preview context */
    MainViewDMX *m_DMXView;
    /** Reference to the 2D Preview context */
    MainView2D *m_2DView;
    /** Reference to the 3D Preview context */
    MainView3D *m_3DView;
    /** Reference to the Fixture Manager */
    FixtureManager *m_fixtureManager;
    /** Reference to the Function Manager */
    FunctionManager *m_functionManager;

    QMap <QString, PreviewContext *> m_contextsMap;

    /** Flag that indicates if multiple item selection is active */
    bool m_multipleSelection;
    /** Flag that indicates if a position picking is active */
    bool m_positionPicking;

    /*********************************************************************
     * Universe filtering
     *********************************************************************/
public:
    /** Get/Set the universe displayed by contexts */
    quint32 universeFilter() const;
    void setUniverseFilter(quint32 universeFilter);

signals:
    void universeFilterChanged(quint32 universeFilter);

private:
    /** The currently displayed universe
      * The value Universe::invalid() means "All universes" */
    quint32 m_universeFilter;

    /*********************************************************************
     * Common fixture helpers
     *********************************************************************/
public:
    /** Select/Deselect a preview item with the provided $itemID */
    Q_INVOKABLE void setItemSelection(quint32 itemID, bool enable, int keyModifiers);

    /** Select/Deselect a fixture with the provided $itemID and $headIndex */
    Q_INVOKABLE void setFixtureSelection(quint32 itemID, int headIndex, bool enable);

    /** Select/Deselect a fixture with the provided $fixtureID */
    Q_INVOKABLE void setFixtureIDSelection(quint32 fixtureID, bool enable);

    /** Deselect all the currently selected fixtures */
    Q_INVOKABLE void resetFixtureSelection();

    /** Toggle between none/all fixture selection */
    Q_INVOKABLE void toggleFixturesSelection();

    /** Select the fixtures that intersects the provided rectangle coordinates in a 2D environment */
    Q_INVOKABLE void setRectangleSelection(qreal x, qreal y, qreal width, qreal height, int keyModifiers);

    /** Returns a list of the selected fixture addresses */
    Q_INVOKABLE QVariantList selectedFixtureAddress();

    /** Returns a list of the selected Fixture IDs as QVariant */
    Q_INVOKABLE QVariantList selectedFixtureIDVariantList();

    /** Returns the number of currently selected fixtures */
    int selectedFixturesCount();

    /** Returns if the fixture with $fxID is currently selected */
    Q_INVOKABLE bool isFixtureSelected(quint32 itemID);

    /** Sets the position of the Fixture with the provided $itemID */
    Q_INVOKABLE void setFixturePosition(quint32 itemID, qreal x, qreal y, qreal z);

    /** Adds an offset (in mm) to the selected Fixture positions. This is called only by the 2D view */
    Q_INVOKABLE void setFixturesOffset(qreal x, qreal y);

    /** Set/Get the position of the currently selected fixtures */
    QVector3D fixturesPosition() const;
    void setFixturesPosition(QVector3D position);

    /** Set the gelatine color for the selected fixtures */
    Q_INVOKABLE void setFixturesGelColor(QColor color);

    /** Align the currently selected Fixtures with the provided $alignment */
    Q_INVOKABLE void setFixturesAlignment(int alignment);

    /** Distribute the currently selected Fixtures with the provided $direction */
    Q_INVOKABLE void setFixturesDistribution(int direction);

    /** Add or remove a linked fixture based on the provided $itemID */
    Q_INVOKABLE void setLinkedFixture(quint32 itemID);

    Q_INVOKABLE void updateFixturesCapabilities();

    /** Get the DMX/degrees value of the current fixture selection
     *  for the requested channel type.
     *  Returns -1 in case of mixed values */
    Q_INVOKABLE qreal getCurrentValue(int type, bool degrees);

    /** Get the RGB color of the current fixture selection */
    Q_INVOKABLE void getCurrentColors(QQuickItem *item);

    Q_INVOKABLE void createFixtureGroup();

    /** Set/Get the rotation of the currently selected fixtures */
    QVector3D fixturesRotation() const;
    void setFixturesRotation(QVector3D degrees);
    void setFixtureRotation(quint32 itemID, QVector3D degrees);

    /** Select/Deselect all the fixtures of the Group/Universe with the provided $id */
    Q_INVOKABLE void setFixtureGroupSelection(quint32 id, bool enable, bool isUniverse);

    Q_INVOKABLE void setChannelValueByType(int type, int value, bool isRelative = false, quint32 channel = UINT_MAX);

    Q_INVOKABLE void setColorValue(QColor col, QColor wauv);

    /** Set a Pan/Tilt position in degrees */
    Q_INVOKABLE void setPositionValue(int type, float degrees, bool isRelative);

    /** Set Pan/Tilt values at half position */
    Q_INVOKABLE void setPositionCenter();

    /** Set a zoom channel in degrees */
    Q_INVOKABLE void setBeamDegrees(float degrees, bool isRelative);

    Q_INVOKABLE void highlightFixtureSelection();

    void setChannelValues(QList<SceneValue> values);

protected slots:
    void slotNewFixtureCreated(quint32 fxID, qreal x, qreal y, qreal z = 0);
    void slotFixtureDeleted(quint32 itemID);
    void slotFixtureFlagsChanged(quint32 itemID, quint32 flags);

    void slotChannelValueChanged(quint32 fxID, quint32 channel, quint8 value);
    void slotPresetChanged(const QLCChannel *channel, quint8 value);

    void slotSimpleDeskValueChanged(quint32 fxID, quint32 channel, quint8 value);

    /** Invoked by the QLC+ engine to inform the UI that the
     *  Universe at $idx has changed */
    void slotUniverseWritten(quint32 idx, const QByteArray& ua);

    /** Invoked when Function editing begins or ends in the Function Manager.
     *  Context Manager doesn't care much about Functions, it just needs
     *  to know if it has to set channel values on the GenericDMXSource or
     *  forward them to the Function Manager */
    void slotFunctionEditingChanged(bool status);

signals:
    void selectedFixturesChanged();
    void fixturesPositionChanged();
    void fixturesRotationChanged();

private:
    /** The list of the currently selected Fixture item IDs */
    QList<quint32> m_selectedFixtures;

    /** A flag indicating if a Function is currently being edited */
    bool m_editingEnabled;

    /** A multihash containing the selected fixtures' capabilities by channel type */
    /** The hash is: int (channel type) , SceneValue (Fixture ID and channel) */
    QMultiHash<int, SceneValue> m_channelsMap;

    /*********************************************************************
     * DMX channels dump
     *********************************************************************/
public:
    /** Store a channel value for Scene dumping */
    Q_INVOKABLE void setDumpValue(quint32 fxID, quint32 channel, uchar value, bool output = true);

    /** Remove a channel from the Scene dumping list */
    Q_INVOKABLE void unsetDumpValue(quint32 fxID, quint32 channel);

    /** Return the number of DMX channels currently available for dumping */
    int dumpValuesCount() const;

    /** Return the current DMX dump channel type mask */
    int dumpChannelMask() const;

    Q_INVOKABLE void dumpDmxChannels(quint32 channelMask, QString sceneName, int sceneID,
                                     bool allChannels, bool nonZeroOnly);

    /** Resets the current values used for dumping or preview */
    Q_INVOKABLE void resetDumpValues();

    /** Return a list only of the fixture IDs from the selected preview items */
    QList<quint32> selectedFixtureIDList() const;

signals:
    void dumpValuesCountChanged();
    void dumpChannelMaskChanged();

private:
    /** List of the values available for dumping to a Scene */
    QList <SceneValue> m_dumpValues;

    /** Bitmask representing the available channel types for
     *  the DMX channels ready for dumping */
    quint32 m_dumpChannelMask;

    /** Reference to a Generic DMX source used to handle Scenes dump */
    GenericDMXSource* m_source;
};

#endif // CONTEXTMANAGER_H