/*
    Copyright (C) 2004 Paul Davis

    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 2 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, write to the Free Software
    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

*/

#ifndef __ardour_gtk_ghost_region_h__
#define __ardour_gtk_ghost_region_h__

#include <vector>
#include <boost/unordered_map.hpp>
#include "pbd/signals.h"

namespace ArdourCanvas {
	class WaveView;
}

class NoteBase;
class Note;
class Hit;
class MidiStreamView;
class TimeAxisView;
class RegionView;
class MidiRegionView;

class GhostRegion : public sigc::trackable
{
public:
	GhostRegion(RegionView& rv,
	            ArdourCanvas::Container* parent,
	            TimeAxisView& tv,
	            TimeAxisView& source_tv,
	            double initial_unit_pos);

	virtual ~GhostRegion();

	virtual void set_samples_per_pixel (double) = 0;
	virtual void set_height();
	virtual void set_colors();

	void set_duration(double units);

	guint source_track_color(unsigned char alpha = 0xff);
	bool is_automation_ghost();

	RegionView& parent_rv;
	/** TimeAxisView that is the AutomationTimeAxisView that we are on */
	TimeAxisView& trackview;
	/** TimeAxisView that we are a ghost for */
	TimeAxisView& source_trackview;
	ArdourCanvas::Container* group;
	ArdourCanvas::Rectangle* base_rect;
};

class AudioGhostRegion : public GhostRegion {
public:
	AudioGhostRegion(RegionView& rv,
	                 TimeAxisView& tv,
	                 TimeAxisView& source_tv,
	                 double initial_unit_pos);

	void set_samples_per_pixel (double);
	void set_height();
	void set_colors();

	std::vector<ArdourCanvas::WaveView*> waves;
};

class MidiGhostRegion : public GhostRegion {
public:
	class GhostEvent : public sigc::trackable {
	  public:
	    GhostEvent(::NoteBase *, ArdourCanvas::Container *);
	    virtual ~GhostEvent ();

	    NoteBase* event;
	    ArdourCanvas::Item* item;
	    bool is_hit;
	};

	MidiGhostRegion(MidiRegionView& rv,
	                TimeAxisView& tv,
	                TimeAxisView& source_tv,
	                double initial_unit_pos);

	MidiGhostRegion(MidiRegionView& rv,
	                MidiStreamView& msv,
	                TimeAxisView& source_tv,
	                double initial_unit_pos);

	~MidiGhostRegion();

	MidiStreamView* midi_view();

	void set_height();
	void set_samples_per_pixel (double spu);
	void set_colors();

	void update_contents_height();

	void add_note(NoteBase*);
	void update_note (GhostEvent* note);
	void update_hit (GhostEvent* hit);
	void remove_note (NoteBase*);

	void redisplay_model();
	void clear_events();

private:
	ArdourCanvas::Container* _note_group;
	ArdourCanvas::Color _outline;
	ArdourCanvas::Rectangle* _tmp_rect;
	ArdourCanvas::Polygon* _tmp_poly;

	MidiRegionView& parent_mrv;
	typedef Evoral::Note<Evoral::Beats> NoteType;
	MidiGhostRegion::GhostEvent* find_event (boost::shared_ptr<NoteType>);

	typedef boost::unordered_map<boost::shared_ptr<NoteType>, MidiGhostRegion::GhostEvent* > EventList;
	EventList events;
	EventList::iterator _optimization_iterator;
};

#endif /* __ardour_gtk_ghost_region_h__ */