/*
  This file is part of Ingen.
  Copyright 2007-2015 David Robillard <http://drobilla.net/>

  Ingen is free software: you can redistribute it and/or modify it under the
  terms of the GNU Affero General Public License as published by the Free
  Software Foundation, either version 3 of the License, or any later version.

  Ingen 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 Affero General Public License for details.

  You should have received a copy of the GNU Affero General Public License
  along with Ingen.  If not, see <http://www.gnu.org/licenses/>.
*/

#include <string>

#include <limits.h>
#include <stdlib.h>

#include <dlfcn.h>

#include <glibmm/module.h>
#include <glibmm/miscutils.h>

#include "ingen/runtime_paths.hpp"

#include "ingen_config.h"

namespace Ingen {

static std::string bundle_path;

/** Must be called once at startup, and passed a pointer to a function
 * that lives in the 'top level' of the bundle (e.g. the executable).
 * Passing a function defined in a module etc. will not work!
 */
void
set_bundle_path_from_code(void* function)
{
	Dl_info dli;
	dladdr(function, &dli);

#ifdef BUNDLE
	char bin_loc[PATH_MAX];
	realpath(dli.dli_fname, bin_loc);
#else
	const char* bin_loc = dli.dli_fname;
#endif

	std::string bundle = bin_loc;
	bundle = bundle.substr(0, bundle.find_last_of(G_DIR_SEPARATOR));
	bundle_path = bundle;
}

void
set_bundle_path(const char* path)
{
	bundle_path = path;
}

/** Return the absolute path of a file in an Ingen LV2 bundle
 */
std::string
bundle_file_path(const std::string& name)
{
	return Glib::build_filename(bundle_path, name);
}

/** Return the absolute path of a 'resource' file.
 */
std::string
data_file_path(const std::string& name)
{
#ifdef BUNDLE
	return Glib::build_filename(bundle_path, Glib::build_path(INGEN_DATA_DIR, name));
#else
	return Glib::build_filename(INGEN_DATA_DIR, name);
#endif
}

/** Return the absolute path of a module (dynamically loaded shared library).
 */
std::string
module_path(const std::string& name, std::string dir)
{
	std::string ret;
	if (dir == "") {
#ifdef BUNDLE
		dir = Glib::build_path(bundle_path, INGEN_MODULE_DIR);
#else
		dir = INGEN_MODULE_DIR;
#endif
	}

	ret = Glib::Module::build_path(dir, std::string("ingen_") + name);

#ifdef __APPLE__
	// MacPorts glib doesnt seem to do portable path building correctly...
	if (ret.substr(ret.length() - 3) == ".so")
		ret = ret.substr(0, ret.length() - 2).append("dylib");
#endif
	return ret;
}

} // namespace Ingen