#ifndef WM_UTIL_HPP
#define WM_UTIL_HPP

#include <functional>
#include <sys/poll.h>
#include <vector>

#ifdef __GNUC__
#define ATTR_FORMAT(stringindex, firsttocheck) \
   __attribute__((format(printf, stringindex, firsttocheck)))
#else
#define ATTR_FORMAT(stringindex, firsttocheck)
#endif

void lognotice(char const *fmt, ...) ATTR_FORMAT(1, 2);
void logerror(char const *fmt, ...) ATTR_FORMAT(1, 2);
void fatal(char const *fmt, ...) ATTR_FORMAT(1, 2);

#ifdef DEBUG_OUTPUT
void logdebug(char const *fmt, ...) ATTR_FORMAT(1, 2);
#else
static inline void logdebug(char const *fmt, ...) ATTR_FORMAT(1, 2);
static inline void logdebug(char const *fmt, ...) {}
#endif

//      _                   _                 _                       __     _
//  ___| |_ _ __ _   _  ___| |_   _   _ _ __ (_) __ _ _   _  ___     / _| __| |
// / __| __| '__| | | |/ __| __| | | | | '_ \| |/ _` | | | |/ _ \   | |_ / _` |
// \__ \ |_| |  | |_| | (__| |_  | |_| | | | | | (_| | |_| |  __/   |  _| (_| |
// |___/\__|_|   \__,_|\___|\__|  \__,_|_| |_|_|\__, |\__,_|\___|___|_|  \__,_|
//                                                 |_|         |_____|
struct unique_fd {
   int fd{-1};
   unique_fd() = default;
   explicit unique_fd(int f) : fd{f} {}
   operator int() const { return fd; }
   ~unique_fd();
   unique_fd(unique_fd const &) = delete;
   unique_fd &operator=(unique_fd const &) = delete;
   unique_fd(unique_fd &&o) : fd(o.fd) { o.fd = -1; }
   unique_fd &operator=(unique_fd &&o) {
      std::swap(this->fd, o.fd);
      return *this;
   }
};

//      _                   _     ____       _ _
//  ___| |_ _ __ _   _  ___| |_  |  _ \ ___ | | | ___ _ __
// / __| __| '__| | | |/ __| __| | |_) / _ \| | |/ _ \ '__|
// \__ \ |_| |  | |_| | (__| |_  |  __/ (_) | | |  __/ |
// |___/\__|_|   \__,_|\___|\__| |_|   \___/|_|_|\___|_|
//
struct Poller {
   std::vector<std::function<int(int)>> handlers;
   std::vector<struct pollfd> pfds;

   Poller() = default;
   void add_fd(int fd, std::function<int(int)> handler);
   int check_events();
};

#endif  // !WM_UTIL_HPP