#include <iostream>
#include <boost/program_options/options_description.hpp>
#include <boost/program_options/positional_options.hpp>
#include <boost/program_options/variables_map.hpp>
#include <boost/program_options/parsers.hpp>

using namespace std;
using namespace boost::program_options;

struct ProgramOptions {
	string configFile;
	string configString;
};

int prepareOptions(ProgramOptions &po, int argc, char **argv) {
	options_description desc("Project Usage:\n\n"
                           "\tproject <options>\n\n"
                           "Options");
  desc.add_options()
    ("help", "display this message")
    ("config", value<string>(&po.configFile), "config file name")
    ("config-value", value<string>(&po.configString), "single config value")
    ;

	variables_map vm;

	try {
		store(command_line_parser(argc, argv).options(desc).run(), vm);
		notify(vm);
	} catch (unknown_option e) {
		cerr << "Error in command line: " << e.what() << "\n\n";
		cout << desc << "\n";
		return 1;
	}

	if (argc <= 1 || vm.count("help")) {
		cout << desc << "\n";
		return 1;
	}

	if (!po.configFile.empty()) {
		printf("config: %s\n", po.configFile.c_str());
	}

	if (!po.configString.empty()) {
		printf("config-value: %s\n", po.configString.c_str());
	}

	return 0;
}

int main(int argc, char **argv) {
	ProgramOptions po;
	return prepareOptions(po, argc, argv);
}