#ifndef APP_ARG_OQMELZBX
#define APP_ARG_OQMELZBX

#include <map>
#include <string>

class AppArg
{
	typedef std::map<std::string, std::string> ArgMap;
public:
	AppArg(int argc, const char *argv[]) {
		Parse(argc, argv);
	}
	bool Has(const std::string &key) const {
		return Pos(key) != args.end();
	}
	std::string Get(const std::string &key, const std::string &def = "") const {
		ArgMap::const_iterator pos = Pos(key);
		if (pos != args.end()) {
			return pos->second;
		} else {
			return def;
		}
	}
private:
	void Parse(int argc, const char *argv[]) {
		for (int i = 1; i < argc; ++i) {
			std::string text(argv[i]);
			if (text.substr(0, 2) == "--") {
				text = text.substr(2);
				std::string::size_type sep = text.find('=');
				if (sep == std::string::npos) {
					args[text].clear();
				} else {
					args[text.substr(0, sep)] = text.substr(sep+1);
				}
			} else if (text.substr(0,1) == "-") {
				text = text.substr(1);
				args[text].clear();
				if (i+1 < argc) {
					std::string next(argv[i+1]);
					if (next.substr(0,1) != "-") {
						args[text] = next;
						++i;
					}
				}
			}
		}
		
	}
	ArgMap::const_iterator Pos(const std::string &key) const {
		return args.find(key);
	}

	ArgMap args;
};

#endif // end of include guard: APP_ARG_OQMELZBX