/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/***************************************************************************
 *            ttlgen.cc
 *
 *  Fri Jul 15 09:27:19 CEST 2016
 *  Copyright 2016 Bent Bisballe Nyeng
 *  deva@aasimon.org
 ****************************************************************************/

/*
 *  This file is part of PluginGizmo.
 *
 *  PluginGizmo is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU Lesser General Public License as published by
 *  the Free Software Foundation; either version 3 of the License, or
 *  (at your option) any later version.
 *
 *  PluginGizmo 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 Lesser General Public License for more details.
 *
 *  You should have received a copy of the GNU Lesser General Public License
 *  along with PluginGizmo; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA.
 */
#include <iostream>
#include <fstream>
#include <dlfcn.h>

#include "pluginlv2.h"

typedef PluginLV2* create_t();

enum class UIType
{
	CocoaUI,
	Gtk3UI,
	GtkUI,
	Qt4UI,
	Qt5UI,
	WindowsUI,
	X11UI,
};

static void header(std::ostream& output)
{
	output << "\
# LV2 Plugin\n\
# Copyright 2019 Bent Bisballe Nyeng <deva@aasimon.org>\n\
#\n\
# Permission to use, copy, modify, and/or distribute this software for any\n\
# purpose with or without fee is hereby granted, provided that the above\n\
# copyright notice and this permission notice appear in all copies.\n\
#\n\
# THIS SOFTWARE IS PROVIDED \"AS IS\" AND THE AUTHOR DISCLAIMS ALL WARRANTIES\n\
# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF\n\
# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR\n\
# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES\n\
# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN\n\
# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF\n\
# OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.\n\
";
}

static void includes(std::ostream& output)
{
	output << "\
@prefix doap:   <http://usefulinc.com/ns/doap#> .\n\
@prefix foaf:   <http://xmlns.com/foaf/0.1/> .\n\
@prefix lv2:    <http://lv2plug.in/ns/lv2core#> .\n\
@prefix atom:   <http://lv2plug.in/ns/ext/atom#> .\n\
@prefix ui:     <http://lv2plug.in/ns/extensions/ui#> .\n\
@prefix state:  <http://lv2plug.in/ns/ext/state#> .\n\
@prefix pprops: <http://lv2plug.in/ns/ext/port-props#> .\n\
@prefix idpy:   <http://harrisonconsoles.com/lv2/inlinedisplay#> .\n\
@prefix time:   <http://lv2plug.in/ns/ext/time#> .\n\
@prefix lv2:    <http://lv2plug.in/ns/lv2core#> .\n\
@prefix rdfs:   <http://www.w3.org/2000/01/rdf-schema#> .\n\
";
}

// If UIClass was not explicitly set already, try to autodetect it based on
// operating system.
#ifndef UIClass
	#ifdef __linux__
		#define UIClass "X11UI"
	#elif _WIN32
		#define UIClass "WindowsUI"
	#elif __APPLE__
		#define UIClass "CocoaUI"
	#elif __FreeBSD__
		#define UIClass "X11UI"
	#elif __unix__
		// All other unices (*BSD etc)
		#define UIClass "X11UI"
	#endif
#endif

static void ui(Plugin& plugin, const std::string& pluginfile, UIType uitype,
               std::ostream& output)
{
	if(!plugin.hasGUI())
	{
		return;
	}

	output << "<" << plugin.getURI() << "/lv2#ui>\n";

	switch(uitype)
	{
	case UIType::CocoaUI:
		output << "	a ui:CocoaUI ;\n";
		break;
	case UIType::Gtk3UI:
		output << "	a ui:Gtk3UI ;\n";
		break;
	case UIType::GtkUI:
		output << "	a ui:GtkUI ;\n";
		break;
	case UIType::Qt4UI:
		output << "	a ui:Qt4UI ;\n";
		break;
	case UIType::Qt5UI:
		output << "	a ui:Qt5UI ;\n";
		break;
	case UIType::WindowsUI:
		output << "	a ui:WindowsUI ;\n";
		break;
	case UIType::X11UI:
		output << "	a ui:X11UI ;\n";
		break;
	}

	output << "\
	lv2:requiredFeature ui:resize ;\n\
	lv2:extensionData ui:resize ;\n\
	lv2:requiredFeature ui:idleInterface ;\n\
	lv2:extensionData ui:idleInterface ;\n\
	lv2:requiredFeature <http://lv2plug.in/ns/ext/instance-access> ;\n\
	ui:binary <" << pluginfile << "> .\n";
}

static void ports(Plugin& plugin, std::ostream& output)
{
	std::size_t port_index = 2;
	for(std::size_t i = 0; i < plugin.getNumberOfMidiInputs(); ++i)
	{
		output << "\
 , [\n\
		a atom:AtomPort ,\n\
			lv2:InputPort;\n\
		atom:bufferType atom:Sequence ;\n\
		atom:supports <http://lv2plug.in/ns/ext/midi#MidiEvent> ;\n\
		lv2:index " << port_index << " ;\n\
		lv2:symbol \"control\" ;\n\
		lv2:name \"Control\"\n\
	]";
		++port_index;
	}

	for(std::size_t i = 0; i < plugin.getNumberOfMidiOutputs(); ++i)
	{
		output << "\
 , [\n\
		a atom:AtomPort ,\n\
			lv2:OutputPort;\n\
		atom:bufferType atom:Sequence ;\n\
		atom:supports <http://lv2plug.in/ns/ext/midi#MidiEvent> ;\n\
		lv2:index " << port_index << " ;\n\
		lv2:symbol \"control\" ;\n\
		lv2:name \"Control\"\n\
	]";
		++port_index;
	}

	std::size_t input_port_index = 1;
	for(std::size_t i = 0; i < plugin.getNumberOfAudioInputs(); ++i)
	{
		output << "\
 , [\n\
		a lv2:AudioPort ,\n\
			lv2:InputPort ;\n\
		lv2:index " << port_index << " ;\n\
		lv2:symbol \"in" << input_port_index << "\" ;\n\
		lv2:name \"In" << input_port_index << "\"\n\
	]";
		++port_index;
		++input_port_index;
	}

	std::size_t output_port_index = 1;
	for(std::size_t i = 0; i < plugin.getNumberOfAudioOutputs(); ++i)
	{
		output << "\
 , [\n\
		a lv2:AudioPort ,\n\
			lv2:OutputPort ;\n\
		lv2:index " << port_index << " ;\n\
		lv2:symbol \"out" << output_port_index << "\" ;\n\
		lv2:name \"Out" << output_port_index << "\"\n\
	]";
		++port_index;
		++output_port_index;
	}
}

void usage(const char* app)
{
	std::cout << "Usage: " << app << " <plugin binary> <output file> [uitype]\n";
	std::cout << "where uitype can be one of:\n";
	std::cout << " CocoaUI\n";
	std::cout << " Gtk3UI\n";
	std::cout << " GtkUI\n";
	std::cout << " Qt4UI\n";
	std::cout << " Qt5UI\n";
	std::cout << " WindowsUI\n";
	std::cout << " X11UI\n";
	std::cout << "default is " UIClass "\n";
}

UIType fromString(const std::string& t)
{
	if(t == "CocoaUI")
	{
		return UIType::CocoaUI;
	}
	if(t == "Gtk3UI")
	{
		return UIType::Gtk3UI;
	}
	if(t == "GtkUI")
	{
		return UIType::GtkUI;
	}
	if(t == "Qt4UI")
	{
		return UIType::Qt4UI;
	}
	if(t == "Qt5UI")
	{
		return UIType::Qt5UI;
	}
	if(t == "WindowsUI")
	{
		return UIType::WindowsUI;
	}
	if(t == "X11UI")
	{
		return UIType::X11UI;
	}

	std::cerr << "Bad uitype: '" << t << "'\n";
	exit(1);
}

int main(int argc, char* argv[])
{
	if(argc < 3 || argc > 4)
	{
		std::cerr << "Missing argument.\n";
		usage(argv[0]);
		return 1;
	}
	UIType uitype = UIType::X11UI;
	if(argc == 4)
	{
		uitype = fromString(argv[3]);
	}

	std::string library = argv[1];
	auto seppos = library.rfind("/");
	std::string binary = library;
	if(seppos != std::string::npos)
	{
		binary = library.substr(seppos + 1);
	}

	// load the plugin library
	void* plugin = dlopen(library.data(), RTLD_LAZY);
	if(!plugin)
	{
		std::cerr << "Cannot load library: " << dlerror() << std::endl;
		std::cerr << "Library must have absolute path or prefix ./myplugin.so.\n";
		return 1;
	}

	// reset errors
	dlerror();

	// load the symbols
	create_t* create_plugin = (create_t*) dlsym(plugin, "createEffectInstance");
	const char* dlsym_error = dlerror();
	if(dlsym_error)
	{
		std::cerr << "Cannot load symbol create: " << dlsym_error << '\n';
		return 1;
	}

	std::ofstream output(argv[2]);

	// create an instance of the class
	Plugin* p = create_plugin();

	header(output);
	output << std::endl;
	includes(output);
	output << std::endl;
	ui(*p, binary, uitype, output);
	output << std::endl;

	output << "\
<" << p->getURI() << "/lv2>\n\
	a lv2:Plugin ;\n\
	lv2:binary <" << binary << "> ;\n \
	a lv2:InstrumentPlugin ;\n\
	doap:name \"" << p->getEffectName() << "\" ;\n\
	doap:maintainer [\n\
		foaf:name \"" << p->getVendorString() << "\" ;\n\
		foaf:homepage <" << p->getHomepage() << "> ;\n\
	] ;\n\
	doap:license <http://usefulinc.com/doap/licenses/gpl> ;\n\
	ui:ui <" << p->getURI() << "/lv2#ui> ;\n\
	doap:license <http://opensource.org/licenses/gpl-3.0> ;\n\
	lv2:optionalFeature <http://lv2plug.in/ns/ext/uri-map> ;\n\
	lv2:optionalFeature <http://lv2plug.in/ns/ext/event> ;\n\
	lv2:optionalFeature idpy:queue_draw ;\n\
	lv2:extensionData state:interface ;\n\
	lv2:port [\n\
		a lv2:InputPort, lv2:ControlPort ;\n\
		lv2:index 0 ;\n\
		lv2:symbol \"lv2_freewheel\" ;\n\
		lv2:name \"Freewheel\" ;\n\
		lv2:default 0.0 ;\n\
		lv2:minimum 0.0 ;\n\
		lv2:maximum 1.0 ;\n\
		lv2:designation <http://lv2plug.in/ns/lv2core#freeWheeling> ;\n\
		lv2:portProperty <http://lv2plug.in/ns/lv2core#freeWheeling> ;\n\
		lv2:portProperty lv2:toggled ;\n\
		lv2:portProperty pprops:hasStrictBounds;\n\
	] , [\n\
		a lv2:OutputPort, lv2:ControlPort ;\n\
		lv2:designation <http://lv2plug.in/ns/lv2core#latency>;\n\
		lv2:index 1;\n\
		lv2:symbol \"latency\";\n\
		lv2:name \"Latency\";\n\
		lv2:minimum 0;\n\
		lv2:maximum 192000;\n\
		lv2:portProperty lv2:reportsLatency, lv2:integer;\n\
	]";

	ports(*p, output);

	output << " .\n";

	// FIXME: The plugin is never deleted, but since we're terminating now anyway
	// it doesn't matter much...

	// unload the plugin library
	dlclose(plugin);

	return 0;
}