/*
   core/loader.cc
   This file is part of the Osirion project and is distributed under
   the terms of the GNU General Public License version 2
*/

#include "auxiliary/functions.h"
#include "core/loader.h"
#include "sys/sys.h"

namespace core
{

Loader::Registry Loader::loader_registry;
std::string Loader::loader_label;

Loader::FactoryFuncPtr Loader::find(const char *label)
{
	Registry::iterator it = loader_registry.find(label);
	if (it == loader_registry.end())
		return 0;
	else
		return (*it).second;
}

Loader::FactoryFuncPtr Loader::find(const std::string &label)
{
	return (find(label.c_str()));
}

void Loader::add(const std::string &label, FactoryFuncPtr factory)
{
	if (find(label)) {
		con_warn << "module '" << label << "' already registered" << std::endl;
		return;
	}

	loader_registry[label] = factory;
	con_debug << "  registering module '" << label << "'" << std::endl;
}

bool Loader::load(const char *label)
{
	FactoryFuncPtr factory = find(label);
	if (!factory) {
		con_warn << "module '" << label << "' not found" << std::endl;
		return false;
	}

	con_debug << "  loading module '" << label << "'" << std::endl;
	loader_label.assign(label);
	return true;
}

bool Loader::load(const std::string &label)
{
	return load(label.c_str());
}

Module *Loader::init()
{
	FactoryFuncPtr factory = find(loader_label);
	if (!factory) {
		con_warn << "module '" << loader_label << "' not found" << std::endl;
	}

	Module *module = factory();
	module->set_label(loader_label);
	return module;
}

void Loader::clear()
{
	loader_registry.clear();
	loader_label.clear();
}

void Loader::list()
{
	std::string loaderlist;
	for (Registry::iterator it = loader_registry.begin(); it != loader_registry.end(); it++) {
		if (loaderlist.size())
			loaderlist += " ";
		loaderlist += (*it).first;

	}
	con_print << loaderlist << std::endl;
	con_print << loader_registry.size() << " registered " << aux::plural("module", loader_registry.size()) << std::endl;
}


}