/*
	Copyright (C) 2010 Andres Cabrera
	mantaraya36@gmail.com

	This file is part of CsoundQt.

	CsoundQt is free software; you can redistribute it
	and/or modify it under the terms of the GNU Lesser General Public
	License as published by the Free Software Foundation; either
	version 2.1 of the License, or (at your option) any later version.

	CsoundQt 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 Lesser General Public License for more details.

	You should have received a copy of the GNU Lesser General Public
	License along with Csound; if not, write to the Free Software
	Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
	02111-1307 USA
*/

#ifndef WIDGETLAYOUT_H
#define WIDGETLAYOUT_H

#include <QtGui>

#define QCS_MAX_EVENTS 4096
#define QCS_CURVE_BUFFER_MAX 4096

#include "qutewidget.h"
#include "curve.h"
#include "widgetpreset.h"

class QuteConsole;
class QuteGraph;
class QuteScope;
class QuteButton;
class FrameWidget;

class RegisteredController {
public:
	RegisteredController(QuteWidget * _widget, int _chan,int  _cc) {
		widget = _widget;
		chan = _chan;
		cc = _cc;
	}
	int chan;
	int cc;
	QuteWidget * widget;
};

class WidgetLayout : public QWidget
{
	Q_OBJECT
	Q_PROPERTY(bool openProperties READ getOpenProperties WRITE setOpenProperties) // To make sure only one properties dialog is displayed at any one time
public:
	WidgetLayout(QWidget* parent);
	~WidgetLayout();
	//    unsigned int widgetCount();
	//    void loadWidgets(QString widgets);
	void loadXmlWidgets(QString xmlWidgets);
	void loadXmlPresets(QString xmlPresets);
	void loadMacWidgets(QString macWidgets);
	QString getWidgetsText(); // With full tags
	QString getPresetsText();
	QString getSelectedWidgetsText();
	QString getMacWidgetsText(); // With full tags
	QStringList getSelectedMacWidgetsText();
	QString getCsladspaLines();
	QString getCabbageWidgets();
	bool openMidiPort(int port);
	void closeMidiPort();
	QVector<QuteWidget *> getWidgets() {return m_widgets;}

	// Data to/from widgets
	void setValue(QString channelName, double value);
	void setValue(QString channelName, QString value);
	void setValue(int index, double value);
	void setValue(int index, QString value);
	QString getStringForChannel(QString channelName, bool *modified = 0);
	double getValueForChannel(QString channelName, bool *modified = 0);
	void getMouseValues(QVector<double> *values);
	int getMouseX();
	int getMouseY();
	int getMouseRelX();
	int getMouseRelY();
	int getMouseBut1();
	int getMouseBut2();
	void setWidgetProperty(QString widgetid, QString property, QVariant value);
	QVariant getWidgetProperty(QString widgetid, QString property);
	void flush();

	// Behavior
	void setKeyRepeatMode(bool repeat);
	void showWidgetTooltips(bool show);
	void setWidgetToolTip(QuteWidget *widget, bool show);
	void setContained(bool contained);
	void setCurrentPosition(QPoint pos); // To set the mouse position for new widgets
	void setFontOffset(double offset);
	void setFontScaling(double scaling);
	void setWidgetsLocked(bool lock);

	// Properties
	bool getOpenProperties() { return m_openProperties; }
	void setOpenProperties(bool open) {m_openProperties = open; }
	// Outer geometry refers to the geometry of the parent panel if not separate window
	void setOuterGeometry(QRect r);
	QRect getOuterGeometry();

	//    void getValues(QVector<QString> *channelNames,
	//                   QVector<double> *values,
	//                   QVector<QString> *stringValues);

	bool uuidFree(QString uuid);
	int newXmlWidget(QDomNode node, bool offset = false, bool newId = false);
	QString newMacWidget(QString widgetLine, bool offset = false);  // Offset is used when pasting duplicated widgets
	void registerWidget(QuteWidget *widget);

	QVector<QVector<int> > midiQueue;
	int midiWriteCounter;
	int midiReadCounter;

	// Notifiations
	void engineStopped(); // To let the widgets know engine has stopped (to free unused curve buffers)

	// Preset methods
	void setPresetName(int num, QString name);
	QList<int> getPresetNums();
	QString getPresetName(int num);
	bool presetExists(int num);

	// Curves from API
	void appendCurve(WINDAT *windat);
	void killCurve(WINDAT *windat);
	void newCurve(Curve* curve);
	void setCurveData(Curve *curve);
	uintptr_t getCurveById(uintptr_t id);
	void updateCurve(WINDAT *windat);
	int killCurves(CSOUND *csound);
	void clearGraphs(); // This also frees the memory allocated by curves.
	void flushGraphBuffer();

	void refreshWidgets();
	bool isModified();
	//    void passWidgetClipboard(QString text);

	void createContextMenu(QContextMenuEvent *event);  // When done outside container widget

	// Edition Actions  (Local edit actions without keyboard shortcuts as the main application handles that)
	QAction *cutAct;
	QAction *copyAct;
	QAction *pasteAct;
	QAction *clearAct;
	QAction *selectAllAct;
	QAction *duplicateAct;
	QAction *deleteAct;
	QAction *propertiesAct;

	// Create new widget Actions
	QAction *createSliderAct;
	QAction *createLabelAct;
	QAction *createDisplayAct;
	QAction *createScrollNumberAct;
	QAction *createLineEditAct;
	QAction *createSpinBoxAct;
	QAction *createButtonAct;
	QAction *createKnobAct;
	QAction *createCheckBoxAct;
	QAction *createMenuAct;
	QAction *createMeterAct;
	QAction *createConsoleAct;
	QAction *createGraphAct;
	QAction *createScopeAct;

	// Alignment Actions
	QAction *alignLeftAct;
	QAction *alignRightAct;
	QAction *alignTopAct;
	QAction *alignBottomAct;
	QAction *sendToBackAct;
	QAction *distributeHorizontalAct;
	QAction *distributeVerticalAct;
	QAction *alignCenterHorizontalAct;
	QAction *alignCenterVerticalAct;

	// Preset actions
	QAction *storePresetAct;
	QAction *newPresetAct;
	QAction *recallPresetAct;

	// Value changes buffer to store all value changes from widgets that have been triggered from the GUI
	QHash<QString, double> newValues;
	QHash<QString, QString> newStringValues;
	QMutex valueMutex;
	QMutex stringValueMutex;
	QReadWriteLock mouseLock;

    QString getQml();
public slots:
	QString createNewLabel(int x = -1, int y = -1, QString channel = QString());
	QString createNewDisplay(int x = -1, int y = -1, QString channel = QString());
	QString createNewScrollNumber(int x = -1, int y = -1, QString channel = QString());
	QString createNewLineEdit(int x = -1, int y = -1, QString channel = QString());
	QString createNewSpinBox(int x = -1, int y = -1, QString channel = QString());
	QString createNewSlider(int x = -1, int y = -1, QString channel = QString());
	QString createNewButton(int x = -1, int y = -1, QString channel = QString());
	QString createNewKnob(int x = -1, int y = -1, QString channel = QString());
	QString createNewCheckBox(int x = -1, int y = -1, QString channel = QString());
	QString createNewMenu(int x = -1, int y = -1, QString channel = QString());
	QString createNewMeter(int x = -1, int y = -1, QString channel = QString());
	QString createNewConsole(int x = -1, int y = -1, QString channel = QString());
	QString createNewGraph(int x = -1, int y = -1, QString channel = QString());
	QString createNewScope(int x = -1, int y = -1, QString channel = QString());
	void clearWidgets();
	void clearWidgetLayout();


	QStringList getUuids();
	QStringList listProperties(QString widgetid); // widgetid can be eihter uuid (prefered) or channel
	bool destroyWidget(QString widgetid);

	void propertiesDialog();
	void applyProperties();
	void selectBgColor();
	void setEditEnabled(bool enabled);
	void setEditMode(bool active);
	void deselectAll();
	void selectAll();
	void widgetMoved(QPair<int, int>);
	void widgetResized(QPair<int, int>);
	void mousePressEventParent(QMouseEvent *event); // To receive events from ancestors when outside the widget area
	void mouseReleaseEventParent(QMouseEvent *event);
	void mouseMoveEventParent(QMouseEvent *event);
	void selectionChanged(QRect selection);
	QSize getUsedSize();
	void adjustLayoutSize();
	void adjustWidgetSize();
	void setModified(bool mod = true);
	void setMouseOffset(int x, int y);

	// Preset slots
	void loadPreset(); // Show dialog and ask
	void loadPresetFromAction();  // Triggered from menu item
	void loadPresetFromItem(QTreeWidgetItem * item, int column);  // Triggered from tree widget
	void loadPreset(int num);
	void loadPresetFromIndex(int index);
	void newPreset(); // Show dialog asking for name
	//    void newPreset(int num, QString name);
	void savePreset(); // Show dialog asking for name
	void savePreset(int num, QString name);

	// Editing
	void copy();
	void cut();
	void paste();
	//    void paste(QPoint pos);
	void duplicate();
	void deleteSelected();
	void undo();
	void redo();

	// Alignment
	void alignLeft();
	void alignRight();
	void alignTop();
	void alignBottom();
	void sendToBack();
	void distributeHorizontal();
	void distributeVertical();
	void alignCenterVertical();
	void alignCenterHorizontal();

	void markHistory();
	void createEditFrame(QuteWidget* widget);

	void widgetChanged(QuteWidget* widget = 0);
	void deleteWidget(QuteWidget *widget);

	void newValue(QPair<QString, double> channelValue);
	void newValue(QPair<QString, QString> channelValue);
	void processNewValues();
	void queueEvent(QString eventLine);

	// Messages
	void appendMessage(QString message);

protected:
	virtual void mousePressEvent(QMouseEvent *event);
	virtual void mouseMoveEvent(QMouseEvent *event);
	virtual void mouseReleaseEvent(QMouseEvent *event);
	virtual void keyPressEvent(QKeyEvent *event);
	virtual void keyReleaseEvent(QKeyEvent *event);
	virtual void contextMenuEvent(QContextMenuEvent *event);
	QRubberBand *selectionFrame;
	int startx, starty;

private:

	QMutex widgetsMutex;
	QMutex layoutMutex;
	QList<Curve *> newCurveBuffer;  // To store curves from Csound for widget panel Graph widgets
	QVector<WINDAT> curveUpdateBuffer; // FIXME move these buffers to documentpage to avoid duplication when having multiple panels
	int curveUpdateBufferCount;
	QList<Curve *> curves;
	QTimer updateTimer;

	unsigned long m_ksmpscount;  // Ksmps counter for Csound engine (Really needed here?)

	// Properties of the panel (saved to xml file)
	int m_posx, m_posy, m_w, m_h; // Position and size of panel (not this widget)
	QString m_objectName;
	QString m_uuid;
	bool m_visible;

	// Configuration
	bool m_repeatKeys;
	bool m_xmlFormat;
	bool m_trackMouse;
	bool m_openProperties; // Open widget properties when creating widgets
	bool m_enableEdit; // Enable editing and properties dialog
	bool m_tooltips;  // Show widget tooltips
	int mouseX, mouseY, mouseRelX, mouseRelY, mouseBut1, mouseBut2;
	int xOffset, yOffset;
	double m_fontOffset, m_fontScaling;

	// For the properties dialog - they store the configuration data for the widget panel
	QPoint currentPosition;  //TODO use proper variables instead of storing data in the widgets...
	QCheckBox *bgCheckBox;
	QPushButton *bgButton;
	int closing; // to control timer when destroying this object

	QVector<QString> m_history;  // Undo/ Redo history
	int m_historyIndex; // Current point in history
	bool m_modified;
	bool m_editMode;
	//    QString m_clipboard;
	bool m_contained; // Whether contained in another widget (e.g. scrollbar in widget panel or widget panel)

	QVector<WidgetPreset> presets;
	int m_currentPreset; // If -1 no current preset

	QList<RegisteredController> registeredControllers;

	// Contained Widgets
	QVector<QuteWidget *> m_widgets;
	QVector<FrameWidget *> editWidgets;
	// These vectors must be used with care since they are not reentrant and will
	// cause problems when accessed simultaneously
	// They are pointers to widgets already in widgets vector
	// TODO check where these are accessed for problems
	QVector<QuteConsole *> consoleWidgets;
	QVector<QuteGraph *> graphWidgets;
	QVector<QuteScope *> scopeWidgets;
	int m_activeWidgets; // Keeps a number of widgets that can be currently accessed by value callbacks (e.g. set to 0 during paste). This is done to avoid locking the callbacks, which are called from a realtime thread

	int parseXmlNode(QDomNode node);
	QString createSlider(int x, int y, int width, int height, QString widgetLine);
	QString createText(int x, int y, int width, int height, QString widgetLine);
	QString createScrollNumber(int x, int y, int width, int height, QString widgetLine);
	QString createLineEdit(int x, int y, int width, int height, QString widgetLine);
	QString createSpinBox(int x, int y, int width, int height, QString widgetLine);
	QString createButton(int x, int y, int width, int height, QString widgetLine);
	QString createKnob(int x, int y, int width, int height, QString widgetLine);
	QString createCheckBox(int x, int y, int width, int height, QString widgetLine);
	QString createMenu(int x, int y, int width, int height, QString widgetLine);
	QString createMeter(int x, int y, int width, int height, QString widgetLine);
	QString createConsole(int x, int y, int width, int height, QString widgetLine);
	QString createGraph(int x, int y, int width, int height, QString widgetLine);
	QString createScope(int x, int y, int width, int height, QString widgetLine);
	QString createDummy(int x, int y, int width, int height, QString widgetLine);

	void setBackground(bool bg, QColor bgColor);
	FrameWidget *getEditWidget(QuteWidget *widget);

	void registerWidgetController(QuteWidget *widget, int cc);
	void registerWidgetChannel(QuteWidget *widget, int chan);
	void unregisterWidgetController(QuteWidget *widget);
	void clearWidgetControllers();

	//Undo history
	void clearHistory();

	// Preset Methods
	int getPresetIndex(int number);

	//XML helper functions
	QColor getColorFromElement(QDomElement elem);  // Converts an XML color element to a QColor structure

private slots:
	void updateData();
	void widgetSelected(QuteWidget *widget);
	void widgetUnselected(QuteWidget *widget);

signals:
	void selection(QRect area);
	void keyPressed(int key);
	void keyReleased(int key);
	void changed(); // Should be triggered whenever widgets change, to let main document know
	void registerScope(QuteScope *scope);
	void registerGraph(QuteGraph *graph);
	void registerButton(QuteButton *button);
	void queueEventSignal(QString eventLine);
	void widgetSelectedSignal(QuteWidget *widget);
	void widgetUnselectedSignal(QuteWidget *widget);
	void showMidiLearn(QuteWidget *);
	void addChn_kSignal(QString channel);
	//    void setWidgetClipboardSignal(QString text);  // To propagate clipboard for sharing between pages
};

#endif // WIDGETLAYOUT_H
