/*
 * Copyright (C) 2007 Doug McLain <doug@nostar.net>
 * Copyright (C) 2008-2014 David Robillard <d@drobilla.net>
 * Copyright (C) 2009-2016 Paul Davis <paul@linuxaudiosystems.com>
 * Copyright (C) 2009 Carl Hetherington <carl@carlh.net>
 * Copyright (C) 2014-2017 Robin Gareus <robin@gareus.org>
 * Copyright (C) 2015-2016 Tim Mayberry <mojofunk@gmail.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.
 */

#pragma once

#include <sstream>
#include <ostream>
#include <iostream>
#include <map>


#include "ardour/types.h" // required for operators used in pbd/configuration_variable.h
#include "ardour/types_convert.h"

#include "pbd/configuration.h"
#include "pbd/configuration_variable.h"
#include "pbd/stateful.h"
#include "pbd/xml++.h"

#include "gtkmm2ext/colors.h"
#include "widgets/ui_config.h"

#include "editing.h"
#include "utils.h"

class UIConfiguration : public ArdourWidgets::UIConfigurationBase
{
private:
	UIConfiguration ();
	~UIConfiguration ();

public:
	static UIConfiguration& instance ();

	static std::string color_file_suffix;
	static void build_metadata ();

	void load_rc_file (bool themechange, bool allow_own = true);

	int load_state ();
	int save_state ();
	int load_defaults ();
	int load_color_theme (bool allow_own);

	void     map_parameters (std::function<void (std::string)>&);
	int      set_state (const XMLNode&, int version);
	XMLNode& get_state () const;
	XMLNode& get_variables (std::string const &) const;
	void     set_variables (const XMLNode&);

	std::string color_file_name (bool use_my, bool with_version, bool fallback = false) const;

	typedef std::map<std::string, Gtkmm2ext::Color>       Colors;
	typedef std::map<std::string, std::string>            ColorAliases;
	typedef std::map<std::string, Gtkmm2ext::SVAModifier> Modifiers;

	Colors       colors;
	ColorAliases color_aliases;
	Modifiers    modifiers;

	void set_alias (std::string const& name, std::string const& alias);
	void set_color (const std::string& name, Gtkmm2ext::Color);
	void set_modifier (std::string const&, Gtkmm2ext::SVAModifier svam);

	Gtkmm2ext::Color quantized (Gtkmm2ext::Color) const;

	Gtkmm2ext::Color       color (const std::string&, bool* failed = 0) const;
	Gtkmm2ext::Color       color_mod (std::string const& color, std::string const& modifier) const;
	Gtkmm2ext::Color       color_mod (const Gtkmm2ext::Color& color, std::string const& modifier) const;
	Gtkmm2ext::SVAModifier modifier (const std::string&) const;

	static std::string color_to_hex_string (Gtkmm2ext::Color c);
	static std::string color_to_hex_string_no_alpha (Gtkmm2ext::Color c);

	void  reset_dpi ();
	float get_ui_scale ();

	sigc::signal<void, std::string> ParameterChanged;

	void parameter_changed (std::string);

	/** called before initializing any part of the GUI. Sets up
	 *  any runtime environment required to make the GUI work
	 *  in specific ways.
	 */
	int pre_gui_init ();

	/** called after the GUI toolkit has been initialized. */
	UIConfiguration* post_gui_init ();

	std::map<std::string,PBD::ConfigVariableBase*> _my_variables;

#undef UI_CONFIG_VARIABLE
#define UI_CONFIG_VARIABLE(Type,var,name,value) \
	Type get_##var () const { return var.get(); } \
	bool set_##var (Type val) { bool ret = var.set (val); if (ret) { ParameterChanged (name); } return ret;  }
#include "ui_config_vars.h"
#undef  UI_CONFIG_VARIABLE
#define CANVAS_FONT_VARIABLE(var,name) \
	Pango::FontDescription get_##var () const { return ARDOUR_UI_UTILS::sanitized_font (var.get()); } \
	Pango::FontDescription get_Ardour##var () const { return ARDOUR_UI_UTILS::ardour_font (var.get()); } \
	bool set_##var (const std::string& val) { bool ret = var.set (val); if (ret) { ParameterChanged (name); } return ret;  }
#include "canvas_vars.h"
#undef CANVAS_FONT_VARIABLE

private:
	/* declare variables */

#undef  UI_CONFIG_VARIABLE
#define UI_CONFIG_VARIABLE(Type,var,name,value) PBD::ConfigVariable<Type> var;
#include "ui_config_vars.h"
#undef UI_CONFIG_VARIABLE

#define CANVAS_FONT_VARIABLE(var,name) PBD::ConfigVariable<std::string> var;
#include "canvas_vars.h"
#undef CANVAS_FONT_VARIABLE

	XMLNode& state () const;
	bool     _dirty;
	bool     aliases_modified;
	bool     colors_modified;
	bool     modifiers_modified;

	int  store_color_theme ();
	void load_color_aliases (XMLNode const&);
	void load_colors (XMLNode const&);
	void load_modifiers (XMLNode const&);
	void reset_gtk_theme ();
	int  load_color_file (std::string const&);
	void colors_changed ();

	uint32_t block_save;
};