#include <libk/align.h>
#include <libk/string.h>
#include <limine/requests.h>
#include <mm/pmm.h>
#include <page_size.h>
#include <stdint.h>
#include <sys/debug.h>

#define LACKS_UNISTD_H    1
#define LACKS_SYS_MMAN_H  1
#define LACKS_SYS_PARAM_H 1
#define LACKS_FCNTL_H     1
#define LACKS_SYS_TYPES_H 1
#define LACKS_SCHED_H     1
#define LACKS_ERRNO_H     1
#define LACKS_STDLIB_H    1
#define LACKS_TIME_H      1
#define LACKS_STRINGS_H   1

#define ABORT                                                                                      \
  {                                                                                                \
    (void)0;                                                                                       \
  }
#define MALLOC_ALIGNMENT 16
#define HAVE_MORECORE    0
#define NO_MALLOC_STATS  1
#define USE_LOCKS        1
#define MALLOC_FAILURE_ACTION                                                                      \
  do {                                                                                             \
    DEBUG ("malloc failure\n");                                                                    \
  } while (0)
#define EINVAL                 -1
#define ENOMEM                 -1
#define DEFAULT_MMAP_THRESHOLD 0

#define open        _open_dummy
#define O_RDWR      0
#define PROT_READ   0
#define PROT_WRITE  0
#define MAP_PRIVATE 0
#define fprintf(...)

int _open_dummy (const char* path, uint16_t modes) {
  (void)path, (void)modes;
  return 0;
}

void* mmap (void* addr, size_t size, int prot, int flags, int fd, size_t off) {
  (void)prot, (void)fd, (void)off, (void)flags;

  if (size == 0)
    return (void*)-1;

  size = div_align_up (size, PAGE_SIZE);

  physaddr_t p_addr = pmm_alloc (size);

  if (p_addr == PMM_ALLOC_ERR)
    return (void*)-1;

  struct limine_hhdm_response* hhdm = limine_hhdm_request.response;
  uintptr_t a = (uintptr_t)(p_addr + hhdm->offset);

  memset ((void*)a, 0, size * PAGE_SIZE);

  return (void*)a;
}

int munmap (void* addr, size_t length) {
  if (length == 0)
    return 0;

  length = div_align_up (length, PAGE_SIZE);

  struct limine_hhdm_response* hhdm = limine_hhdm_request.response;

  physaddr_t p_addr = (uintptr_t)addr - hhdm->offset;

  pmm_free (p_addr, length);

  return 0;
}