/*
 * Copyright (C) 2008-2011 David Robillard <d@drobilla.net>
 * Copyright (C) 2008-2012 Hans Baier <hansfbaier@googlemail.com>
 * Copyright (C) 2010-2013 Paul Davis <paul@linuxaudiosystems.com>
 * Copyright (C) 2011 Carl Hetherington <carl@carlh.net>
 * Copyright (C) 2017 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.
 */

#pragma once

#include <set>
#include "sigc++/trackable.h"

#include "gtkmm/table.h"
#include "gtkmm/box.h"
#include "gtkmm/button.h"
#include "gtkmm/radiobutton.h"
#include "gtkmm/label.h"

#include "widgets/stateful_button.h"

#include "ardour/types.h"

#include "ardour_window.h"

namespace ARDOUR {
	class MidiTrack;
}

class MidiChannelSelector : public Gtk::Table
{
public:
	MidiChannelSelector(int n_rows = 4, int n_columns = 4, int start_row = 0, int start_column = 0);
	virtual ~MidiChannelSelector() = 0;

	sigc::signal<void> clicked;

	void set_channel_colors(const uint32_t new_channel_colors[16]);
	void set_default_channel_color();

protected:
	virtual void button_toggled(Gtk::ToggleButton* button, uint8_t button_nr) = 0;
	Gtk::Label                          _button_labels[4][4];
	ArdourWidgets::StatefulToggleButton _buttons[4][4];
	int                                 _recursion_counter;

	bool was_clicked (GdkEventButton*);
};

class SingleMidiChannelSelector : public MidiChannelSelector
{
public:
	SingleMidiChannelSelector(uint8_t active_channel = 0);

	uint8_t get_active_channel() const { return _active_channel; }

	sigc::signal<void, uint8_t> channel_selected;

protected:
	virtual void button_toggled(Gtk::ToggleButton* button, uint8_t button_nr);

	Gtk::ToggleButton* _last_active_button;
	uint8_t            _active_channel;
};

class MidiMultipleChannelSelector : public MidiChannelSelector
{
public:
	MidiMultipleChannelSelector(ARDOUR::ChannelMode mode = ARDOUR::FilterChannels,
			uint16_t initial_selection = 0xFFFF);

	virtual ~MidiMultipleChannelSelector();

	/** The channel mode or selected channel(s) has changed.
	 *  First parameter is the new channel mode, second parameter is a bitmask
	 *  of the currently selected channels.
	 */
	sigc::signal<void, ARDOUR::ChannelMode, uint16_t> mode_changed;

	void set_channel_mode(ARDOUR::ChannelMode mode, uint16_t mask);
	ARDOUR::ChannelMode get_channel_mode () const { return _channel_mode; }

	/**
	 * @return each bit in the returned word represents a midi channel, eg.
	 *         bit 0 represents channel 0 and bit 15 represents channel 15
	 *
	 */
	uint16_t get_selected_channels() const;
	void     set_selected_channels(uint16_t selected_channels);

protected:
	ARDOUR::ChannelMode _channel_mode;
	ARDOUR::NoteMode    _note_mode;

	virtual void button_toggled(Gtk::ToggleButton* button, uint8_t button_nr);
	void force_channels_button_toggled();

	void select_all(bool on);
	void invert_selection(void);

	Gtk::Button       _select_all;
	Gtk::Button       _select_none;
	Gtk::Button       _invert_selection;
	Gtk::ToggleButton _force_channel;
};

class MidiChannelSelectorWindow : public ArdourWindow, public PBD::ScopedConnectionList
{
public:
	MidiChannelSelectorWindow (std::shared_ptr<ARDOUR::MidiTrack>);
	~MidiChannelSelectorWindow ();

	void set_channel_colors (const uint32_t new_channel_colors[16]);
	void set_default_channel_color();

private:
	std::shared_ptr<ARDOUR::MidiTrack> track;
	std::vector<Gtk::ToggleButton*> playback_buttons;
	std::vector<Gtk::ToggleButton*> capture_buttons;

	std::vector<Gtk::Widget*> playback_mask_controls;
	std::vector<Gtk::Widget*> capture_mask_controls;

	Gtk::HBox         capture_mask_box;
	Gtk::HBox         playback_mask_box;
	Gtk::RadioButtonGroup playback_button_group;
	Gtk::RadioButton playback_all_button;
	Gtk::RadioButton playback_filter_button;
	Gtk::RadioButton playback_force_button;
	Gtk::RadioButtonGroup capture_button_group;
	Gtk::RadioButton capture_all_button;
	Gtk::RadioButton capture_filter_button;
	Gtk::RadioButton capture_force_button;

	ARDOUR::ChannelMode last_drawn_capture_mode;
	ARDOUR::ChannelMode last_drawn_playback_mode;

	void build();
	void set_capture_selected_channels (uint16_t);
	void set_playback_selected_channels (uint16_t);

	void fill_playback_mask ();
	void zero_playback_mask ();
	void invert_playback_mask ();

	void fill_capture_mask ();
	void zero_capture_mask ();
	void invert_capture_mask ();

	void playback_mask_changed ();
	void capture_mask_changed ();
	void playback_mode_changed ();
	void capture_mode_changed ();

	void playback_channel_clicked (uint16_t);
	void capture_channel_clicked (uint16_t);

	void playback_all_clicked();
	void playback_none_clicked();
	void playback_invert_clicked();

	void capture_all_clicked();
	void capture_none_clicked();
	void capture_invert_clicked();

	void capture_mode_toggled (ARDOUR::ChannelMode);
	void playback_mode_toggled (ARDOUR::ChannelMode);
};