/**
 * Socket compatibility layer for cross-platform support (POSIX / Windows)
 * MSYS2 UCRT64 compatible
 */

#ifndef SOCKET_COMPAT_H
#define SOCKET_COMPAT_H

#ifdef _WIN32
    #include <winsock2.h>
    #include <ws2tcpip.h>
    
    typedef SOCKET socket_t;
    #define SOCKET_INVALID INVALID_SOCKET
    #define SOCKET_ERROR_CODE SOCKET_ERROR
    
    // Error codes
    #define ERR_WOULDBLOCK WSAEWOULDBLOCK
    #define ERR_AGAIN WSAEWOULDBLOCK
    #define ERR_INTR WSAEINTR
    
#else
    // POSIX systems
    #include <sys/socket.h>
    #include <arpa/inet.h>
    #include <netinet/in.h>
    #include <fcntl.h>
    #include <unistd.h>
    #include <errno.h>
    #include <string.h>
    
    typedef int socket_t;
    #define SOCKET_INVALID (-1)
    #define SOCKET_ERROR_CODE (-1)
    
    #define ERR_WOULDBLOCK EWOULDBLOCK
    #define ERR_AGAIN EAGAIN
    #define ERR_INTR EINTR
#endif

// Platform initialization/cleanup
int socket_platform_init(void);
void socket_platform_cleanup(void);

// Socket operations
socket_t socket_create_udp(int family);
int socket_set_nonblocking(socket_t sock);
int socket_close_wrapper(socket_t sock);
static inline int socket_get_error(void) {
#ifdef _WIN32
    return WSAGetLastError();
#else
    return errno;
#endif
}

// Socket options
int socket_set_buffers(socket_t sock, int sndbuf, int rcvbuf);
int socket_set_reuseaddr(socket_t sock, int reuse);
int socket_bind_to_device(socket_t sock, const char* ifname);
int socket_set_mark(socket_t sock, int mark);

// I/O operations
ssize_t socket_sendto(socket_t sock, const void* buf, size_t len,
                      struct sockaddr* dest, socklen_t dest_len);
ssize_t socket_recvfrom(socket_t sock, void* buf, size_t len,
                        struct sockaddr* src, socklen_t* src_len);

// Utility
const char* socket_strerror(int err);

#endif // SOCKET_COMPAT_H