/*
 * Copyright (C) 2008-2009 Sampo Savolainen <v2@iki.fi>
 * Copyright (C) 2009-2012 David Robillard <d@drobilla.net>
 * Copyright (C) 2009-2017 Paul Davis <paul@linuxaudiosystems.com>
 * Copyright (C) 2010 Carl Hetherington <carl@carlh.net>
 * Copyright (C) 2018-2019 Robin Gareus <robin@gareus.org>
 *
 * 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 __ardour_plugin_eq_gui_h
#define __ardour_plugin_eq_gui_h

#include "pbd/signals.h"

#include "ardour/buffer_set.h"

#include <gtkmm/table.h>
#include <gtkmm/drawingarea.h>
#include <gtkmm/combobox.h>
#include <gtkmm/comboboxtext.h>
#include <gtkmm/liststore.h>

namespace ARDOUR {
	class Plugin;
	class PluginInsert;
}

namespace GTKArdour {
	class FFT;
}

class PluginEqGui : public Gtk::Table
{
public:
	PluginEqGui (std::shared_ptr<ARDOUR::PluginInsert>);
	~PluginEqGui ();

private:
	// Setup
	void set_buffer_size (uint32_t, uint32_t);
	void change_dB_scale ();

	// Analysis
	void run_impulse_analysis ();
	void signal_collect_callback (ARDOUR::BufferSet *, ARDOUR::BufferSet *);
	float _signal_analysis_running;

	// Drawing
	virtual void on_hide ();
	virtual void on_show ();

	void stop_updating ();
	void start_updating ();

	void start_listening ();
	void stop_listening ();

	void resize_analysis_area (Gtk::Allocation&);
	void redraw_analysis_area ();

	void draw_analysis_scales (cairo_t *);
	bool expose_analysis_area (GdkEventExpose *);

	void draw_scales_power (Gtk::Widget *, cairo_t *);
	void plot_impulse_amplitude (Gtk::Widget *,cairo_t *);

	void draw_scales_phase (Gtk::Widget *,cairo_t *);
	void plot_impulse_phase (Gtk::Widget *,cairo_t *);

	void plot_signal_amplitude_difference (Gtk::Widget *,cairo_t *);

	void update_pointer_info(float);
	bool analysis_area_mouseover(GdkEventMotion *);
	bool analysis_area_mouseexit(GdkEventCrossing *);

	// Helpers
	bool timeout_callback ();
	void redraw_scales ();

	// Fields:

	// analysis parameters
	float _samplerate;

	float _min_dB;
	float _max_dB;
	float _step_dB;

	float _log_coeff;
	float _log_max;

	ARDOUR::samplecnt_t _block_size;
	ARDOUR::samplecnt_t _buffer_size;
	ARDOUR::samplecnt_t _signal_buffer_size;

	// buffers
	ARDOUR::BufferSet _bufferset;
	ARDOUR::BufferSet _collect_bufferset;

	// dimensions
	float _analysis_width;
	float _analysis_height;

	// My objects
	GTKArdour::FFT *_impulse_fft;
	GTKArdour::FFT *_signal_input_fft;
	GTKArdour::FFT *_signal_output_fft;
	std::shared_ptr<ARDOUR::Plugin> _plugin;
	std::shared_ptr<ARDOUR::PluginInsert> _plugin_insert;

	// gui objects
	Gtk::DrawingArea *_analysis_area;
	cairo_surface_t *_analysis_scale_surface;
	Gtk::Label *_pointer_info;
	int _pointer_in_area_xpos;
	int _pointer_in_area_freq;

	// dB scale selection:
	class dBSelectionColumns : public Gtk::TreeModel::ColumnRecord
	{
	public:
		dBSelectionColumns()
		{ add(dBMin); add(dBMax); add(dBStep); add(name); }

		Gtk::TreeModelColumn<float> dBMin;
		Gtk::TreeModelColumn<float> dBMax;
		Gtk::TreeModelColumn<float> dBStep;
		Gtk::TreeModelColumn<std::string> name;
	};

	dBSelectionColumns dBColumns;

	Gtk::ComboBox *dBScaleCombo;
	Glib::RefPtr<Gtk::ListStore> dBScaleModel;

	Gtk::ComboBoxText* _live_signal_combo;

	Gtk::CheckButton *_phase_button;

	// signals and connections
	sigc::connection _update_connection;
	sigc::connection _window_unmap_connection;
	sigc::connection _window_map_connection;

	PBD::ScopedConnection analysis_connection;
};

#endif
