/* LVZ - A C++ interface for writing LV2 plugins.
 * Copyright (C) 2008 Dave Robillard <http://drobilla.net>
 *  
 * This library 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 library 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 St, Fifth Floor, Boston, MA 02110-1301 USA.
 */

#include <iostream>
#include <fstream>
#include <dlfcn.h>
#include "audioeffectx.h"

using namespace std;

typedef AudioEffectX* (*new_effect_func)();
typedef AudioEffectX* (*plugin_uri_func)();

// VST is so incredibly awful.  Just.. wow.
#define MAX_NAME_LENGTH 1024
char name[MAX_NAME_LENGTH];

#define NS_LV2CORE "http://lv2plug.in/ns/lv2core#"

void
write_data(AudioEffectX* effect, const char* lib_file_name)
{
	string data_file_name = lib_file_name;
	data_file_name = data_file_name.substr(0, data_file_name.find_last_of("."));
	data_file_name += ".ttl";
	
	//ostream& os = cout;
	fstream os(data_file_name.c_str(), ios::out);
	effect->getProductString(name);
	
	os << "@prefix : <http://lv2plug.in/ns/lv2core#> ." << endl;
	os << "@prefix doap: <http://usefulinc.com/ns/doap#> ." << endl << endl;
	os << "<" << effect->getURI() << ">" << endl;
	os << "\t:symbol \"" << effect->getUniqueID() << "\" ;" << endl;
	os << "\tdoap:name \"" << name << "\"";

	if (effect->getNumInputs() + effect->getNumOutputs() == 0)
		os << " ." << endl;
	else
		os << " ;" << endl;
	
	for (uint32_t i = 0; i < effect->getNumInputs(); ++i) {
		if (i == 0)
			os << "\t:port [" << endl;

		os << "\t\ta :InputPort, :AudioPort ;" << endl;
		os << "\t\t:index" << " " << i << " ;" << endl;

		if (i == effect->getNumInputs() - 1) {
			os << "\t] " << (effect->getNumOutputs() ? ";" : ".") << endl;
		} else {
			os << "\t] , [" << endl;
		}
	}
	
	for (uint32_t i = 0; i < effect->getNumOutputs(); ++i) {
		if (i == 0)
			os << "\t:port [" << endl;

		os << "\t\ta :OutputPort, :AudioPort ;" << endl;
		os << "\t\t:index" << " " << effect->getNumInputs() + i << " ;" << endl;

		if (i == effect->getNumInputs() - 1) {
			os << "\t] ." << endl;
		} else {
			os << "\t] , [" << endl;
		}
	}

	os.close();
	cout << "Wrote " << data_file_name << endl;
}


int
main(int argc, char** argv)
{
	if (argc == 0) {
		cout << "Usage: gendata [PLUGINLIB1] [PLUGINLIB2]..." << endl;
		cout << "Each argument is a path to a LVZ plugin library." << endl;
		cout << "For each library an LV2 data file with the same name" << endl;
		cout << "will be output containing the data for that plugin." << endl;
		return 1;
	}

	new_effect_func constructor = NULL;
	AudioEffectX*   effect      = NULL; 

	for (int i = 1; i < argc; ++i) {
		void* handle = dlopen(argv[i], RTLD_NOW);
		if (handle == NULL) {
			cerr << "ERROR: " << argv[i] << " is not a shared library, ignoring" << endl;
			continue;
		}

		constructor = (new_effect_func)dlsym(handle, "lvz_new_audioeffectx");
		if (constructor == NULL) {
			dlclose(handle);
			cerr << "ERROR: " << argv[i] << " is not an LVZ plugin library, ignoring" << endl;
			continue;
		}

		effect = constructor();
		write_data(effect, argv[i]);

		dlclose(handle);
	}
	
	return 0;
}