/*
 * 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.
 */

#ifndef __gtkardour_patch_change_widget_h__
#define __gtkardour_patch_change_widget_h__

#include <gtkmm/box.h>
#include <gtkmm/notebook.h>
#include <gtkmm/spinbutton.h>
#include <gtkmm/table.h>

#include "midi++/midnam_patch.h"
#include "pbd/signals.h"

#include "ardour/route.h"

#include "widgets/ardour_button.h"
#include "widgets/ardour_dropdown.h"

#include "ardour_dialog.h"
#include "ardour_window.h"
#include "pianokeyboard.h"

namespace ARDOUR {
	class MIDITrigger;
};

class PatchBankList
{
public:
	PatchBankList ();
	virtual ~PatchBankList ();

protected:
	void refill (std::shared_ptr<MIDI::Name::ChannelNameSet>, int const bank);
	void set_active_pgm (uint8_t);

	virtual void select_bank (uint32_t)     = 0;
	virtual void select_program (uint8_t)   = 0;
	virtual void instrument_info_changed () = 0;

	ArdourWidgets::ArdourDropdown _bank_select;
	Gtk::SpinButton               _bank_msb_spin;
	Gtk::SpinButton               _bank_lsb_spin;
	Gtk::Table                    _program_table;

private:
	void select_bank_spin ();

	ArdourWidgets::ArdourButton              _program_btn[128];
	std::shared_ptr<MIDI::Name::PatchBank> _current_patch_bank;
	bool                                     _ignore_spin_btn_signals;

};

class PatchChangeTab : public Gtk::VBox, public PatchBankList
{
public:
	PatchChangeTab (int channel);

	void refresh ();
	void reset (std::shared_ptr<ARDOUR::Route>, std::shared_ptr<ARDOUR::MIDITrigger>);

protected:
	int     bank () const;
	uint8_t program () const;

	/* Implement PatchBankList */
	void select_bank (uint32_t);
	void select_program (uint8_t);

private:
	void refill_banks ();
	void trigger_property_changed (PBD::PropertyChange const&);
	void enable_toggle ();
	void update_sensitivity ();
	void instrument_info_changed ();

	ArdourWidgets::ArdourButton _enable_btn;

	int  _channel;
	int  _bank;
	bool _ignore_callback;

	std::shared_ptr<ARDOUR::Route>       _route;
	std::shared_ptr<ARDOUR::MIDITrigger> _trigger;
	PBD::ScopedConnectionList              _connections;
};

class PatchChangeWidget : public Gtk::VBox, public PatchBankList
{
public:
	PatchChangeWidget (std::shared_ptr<ARDOUR::Route>);
	~PatchChangeWidget ();

	void refresh ();

protected:
	int     bank (uint8_t) const;
	uint8_t program (uint8_t) const;

	void on_show ();
	void on_hide ();

private:
	void refill_banks ();

	void select_channel (uint8_t);

	/* Implement PatchBankList */
	void select_bank (uint32_t);
	void select_program (uint8_t);

	/* Route Callbacks */
	void instrument_info_changed ();
	void processors_changed ();

	/* callbacks from route AC */
	void bank_changed ();
	void program_changed ();
	void bankpatch_changed (uint8_t);

	/* Audition */
	void audition_toggle ();
	void check_note_range (bool);
	void audition ();
	void cancel_audition ();
	bool audition_next ();

	std::shared_ptr<ARDOUR::Route> _route;
	ARDOUR::InstrumentInfo&          _info;

	uint8_t _channel;
	bool    _no_notifications;

	ArdourWidgets::ArdourDropdown _channel_select;
	ArdourWidgets::ArdourButton   _audition_enable;
	Gtk::SpinButton               _audition_start_spin; // Consider a click-box w/note-names
	Gtk::SpinButton               _audition_end_spin;
	Gtk::SpinButton               _audition_velocity;
	uint8_t                       _audition_note_num;
	bool                          _audition_note_on;

	APianoKeyboard _piano;

	void _note_on_event_handler (int, int);
	void note_on_event_handler (int, bool for_audition);
	void note_off_event_handler (int);

	sigc::connection          _note_queue_connection;
	PBD::ScopedConnectionList _ac_connections;
	PBD::ScopedConnectionList _route_connections;
};

class PatchChangeTriggerWindow : public ArdourWindow
{
public:
	PatchChangeTriggerWindow ();

	void reset (std::shared_ptr<ARDOUR::Route>, std::shared_ptr<ARDOUR::MIDITrigger>);
	void clear ();

private:
	void on_switch_page (GtkNotebookPage*, guint page_num);

	Gtk::Notebook   _notebook;
	PatchChangeTab* _w[16];

	PBD::ScopedConnection _route_connection;
};

class PatchChangeGridDialog : public ArdourDialog
{
public:
	PatchChangeGridDialog (std::shared_ptr<ARDOUR::Route>);

	void on_hide ()
	{
		w.hide ();
		ArdourDialog::on_hide ();
	}

	void on_show ()
	{
		w.show ();
		ArdourDialog::on_show ();
	}

	void refresh ()
	{
		w.refresh ();
	}

private:
	void                  route_property_changed (const PBD::PropertyChange&, std::weak_ptr<ARDOUR::Route>);
	PBD::ScopedConnection _route_connection;
	PatchChangeWidget     w;
};

#endif