/*
 * Copyright (C) 2021 Paul Davis <paul@linuxaudiosystems.com>
 * Copyright (C) 2021 Ben Loftis <ben@harrisonconsoles.com>
 *
 * 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.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */

#ifndef __audio_region_trimmer_box_h__
#define __audio_region_trimmer_box_h__

#include <map>

#include <gtkmm/box.h>
#include <gtkmm/label.h>
#include <gtkmm/table.h>

#include "ardour/ardour.h"
#include "ardour/types.h"
#include "ardour/session_handle.h"

#include "gtkmm2ext/actions.h"
#include "gtkmm2ext/bindings.h"
#include "gtkmm2ext/cairo_packer.h"

#include "widgets/ardour_button.h"

#include "canvas/canvas.h"
#include "canvas/container.h"
#include "canvas/line.h"
#include "canvas/rectangle.h"
#include "canvas/scroll_group.h"

#include "audio_clock.h"

namespace ARDOUR {
	class Session;
	class Location;
}

namespace ArdourCanvas {
	class Text;
	class Polygon;
};

namespace ArdourWaveView {
class WaveView;
}

class ClipEditorBox : public Gtk::VBox, public ARDOUR::SessionHandlePtr
{
public:
	ClipEditorBox () {}
	~ClipEditorBox () {}

	virtual void set_region (boost::shared_ptr<ARDOUR::Region>) =0;

	static void init ();
	static void register_clip_editor_actions (Gtkmm2ext::Bindings*);
	static Glib::RefPtr<Gtk::ActionGroup> clip_editor_actions;
};

class ClipEditor
{
   public:
	virtual ~ClipEditor() {}

	virtual void zoom_in () = 0;
	virtual void zoom_out () = 0;
};

class AudioClipEditor : public ArdourCanvas::GtkCanvas
{
   public:
	AudioClipEditor ();
	~AudioClipEditor ();

	void set_region (boost::shared_ptr<ARDOUR::AudioRegion>);
	void on_size_allocate (Gtk::Allocation&);

	double sample_to_pixel (ARDOUR::samplepos_t);
	samplepos_t pixel_to_sample (double);

	void set_spp (double);
	double spp() const { return _spp; }

	bool key_press (GdkEventKey*);

  private:
	ArdourCanvas::Rectangle* frame;
	ArdourCanvas::ScrollGroup* waves_container;
	ArdourCanvas::Container* line_container;
	ArdourCanvas::Line* start_line;
	ArdourCanvas::Line* end_line;
	ArdourCanvas::Line* loop_line;
	std::vector<ArdourWaveView::WaveView *> waves;
	double _spp;
	boost::shared_ptr<ARDOUR::AudioRegion> audio_region;

	enum LineType {
		StartLine,
		EndLine,
		LoopLine,
	};

	bool event_handler (GdkEvent* ev);
	bool line_event_handler (GdkEvent* ev, ArdourCanvas::Line*);
	void drop_waves ();
	void set_wave_heights (int);
	void set_spp_from_length (ARDOUR::samplecnt_t);
	void set_waveform_colors ();
	void set_colors ();
	void position_lines ();

	class LineDrag {
	  public:
		LineDrag (AudioClipEditor&, ArdourCanvas::Line&);

		void begin (GdkEventButton*);
		void end (GdkEventButton*);
		void motion (GdkEventMotion*);

	  private:
		AudioClipEditor& editor;
		ArdourCanvas::Line& line;
	};

	friend class LineDrag;
	LineDrag* _current_drag;
};

class AudioClipEditorBox : public ClipEditorBox
{
public:
	AudioClipEditorBox ();
	~AudioClipEditorBox ();

	void set_region (boost::shared_ptr<ARDOUR::Region>);
	void region_changed (const PBD::PropertyChange& what_changed);

private:
	Gtk::HBox  header_box;
	ArdourWidgets::ArdourButton zoom_in_button;
	ArdourWidgets::ArdourButton zoom_out_button;
	Gtk::Label _header_label;
	Gtk::Table table;

	AudioClipEditor *editor;

	PBD::ScopedConnection state_connection;

	boost::shared_ptr<ARDOUR::Region> _region;

	void zoom_in_click ();
	void zoom_out_click ();
};

#endif /* __audio_region_trimmer_box_h__ */