/* platform_compat.c - Platform compatibility layer implementation */

#include "platform_compat.h"
#include <stddef.h>
#include <stdint.h>

#ifdef _WIN32
    #include <windows.h>
    #include <bcrypt.h>
    #ifndef STATUS_SUCCESS
        #define STATUS_SUCCESS ((NTSTATUS)0x00000000L)
    #endif
#else
    #include <fcntl.h>
    #include <unistd.h>
#endif

/*
 * Generate cryptographically secure random bytes
 * Returns 0 on success, -1 on error
 */
int random_bytes(uint8_t *buffer, size_t len) {
    if (!buffer || len == 0) return -1;
    
#ifdef _WIN32
    NTSTATUS status = BCryptGenRandom(NULL, buffer, (ULONG)len, BCRYPT_USE_SYSTEM_PREFERRED_RNG);
    return (status == STATUS_SUCCESS) ? 0 : -1;
#else
    int fd = open("/dev/urandom", O_RDONLY);
    if (fd < 0) return -1;
    
    ssize_t ret = read(fd, buffer, len);
    close(fd);
    
    return (ret == (ssize_t)len) ? 0 : -1;
#endif
}