#pragma once

#include <al/str.h>
#include <al/lib.h>

#ifdef NAUNET_NEEDS_STDIO_ASSIST
// It seems meson adds _FILE_OFFSET_BITS=64 on all "linuxlike" compilers even MinGW.
// https://github.com/mesonbuild/meson/commit/853634a48da025c59eef70161dba0d150833f60d
// https://github.com/mesonbuild/meson/issues/12931
// I don't think we necessarily want this on 32-bit Windows.
#include <stdio.h>
#ifdef NAUNET_ON_WINDOWS
#if _FILE_OFFSET_BITS == 64
#define fseek _fseeki64
#define ftell _ftelli64
#endif
#else
#define fseek fseeko
#define ftell ftello
#endif
#else
#ifdef NAUNET_ON_WINDOWS
#else
#include <dirent.h>
#include <fcntl.h>
#include <unistd.h>
#include <sys/stat.h>
#include <sys/mman.h>
#endif
#endif

enum {
    NNWT_FILE_READONLY = 1,
    NNWT_FILE_CREATE = 1 << 1,
    NNWT_FILE_LOCK = 1 << 2
};

enum {
    NNWT_ENTRY_FILE = 0,
    NNWT_ENTRY_DIR,
    NNWT_ENTRY_OTHER
};

struct nn_file {
    s32 flags;
#ifdef NAUNET_NEEDS_STDIO_ASSIST
    FILE *file;
#else
#ifdef NAUNET_ON_WINDOWS
#else
    s32 fd;
#endif
#endif
    str path;
    size_t size;
};

struct nn_dir {
#ifdef NAUNET_NEEDS_STDIO_ASSIST
#else
#ifdef NAUNET_ON_WINDOWS
#else
    DIR *dir;
#endif
#endif
    str path;
};

struct nn_dir_entry {
    u8 type;
#ifdef NAUNET_NEEDS_STDIO_ASSIST
#else
#ifdef NAUNET_ON_WINDOWS
#else
    struct dirent *entry;
#endif
#endif
};

bool nn_file_open(struct nn_file *file, str *path, s32 flags);
bool nn_file_exists(str *path);
bool nn_file_create(str *path);
bool nn_file_truncate(struct nn_file *file, off_t size);
bool nn_file_flush(struct nn_file *file);
off_t nn_file_seek(struct nn_file *file, off_t offset, s32 whence);
bool nn_file_write(struct nn_file *file, void *buf, size_t size);
bool nn_file_read(struct nn_file *file, void *buf, size_t size);
s32 nn_file_read_as_str(struct nn_file *file, str *out);
s32 nn_file_read_as_c_str(struct nn_file *file, char **out);
s32 nn_file_replace(struct nn_file *file, str *buf);
void *nn_file_mmap(struct nn_file *file);
void *nn_file_mremap(struct nn_file *file, size_t size, void *old_map);
void nn_file_munmap(struct nn_file *file, void *map);
void nn_file_close(struct nn_file *file);

bool nn_dir_open(struct nn_dir *dir, str *path);
void nn_dir_close(struct nn_dir *dir);
bool nn_dir_exists(str *path);
bool nn_dir_create(str *path);
bool nn_dir_read(struct nn_dir *dir, struct nn_dir_entry *entry);
void nn_dir_entry_get_name(struct nn_dir_entry *entry, str *name);
const char *nn_dir_entry_get_os_name(struct nn_dir_entry *entry);
void nn_dir_entry_get_path(struct nn_dir_entry *entry, struct nn_dir *dir, str *path);