package os2

import "core:io"
import "core:time"

Handle :: distinct uintptr;

Seek_From :: enum {
	Start   = 0, // seek relative to the origin of the file
	Current = 1, // seek relative to the current offset
	End     = 2, // seek relative to the end
}

File_Mode :: distinct u32;
File_Mode_Dir         :: File_Mode(1<<16);
File_Mode_Named_Pipe  :: File_Mode(1<<17);
File_Mode_Device      :: File_Mode(1<<18);
File_Mode_Char_Device :: File_Mode(1<<19);
File_Mode_Sym_Link    :: File_Mode(1<<20);


O_RDONLY :: int( 0);
O_WRONLY :: int( 1);
O_RDWR   :: int( 2);
O_APPEND :: int( 4);
O_CREATE :: int( 8);
O_EXCL   :: int(16);
O_SYNC   :: int(32);
O_TRUNC  :: int(64);



stdin:  Handle = 0; // OS-Specific
stdout: Handle = 1; // OS-Specific
stderr: Handle = 2; // OS-Specific


create :: proc(name: string) -> (Handle, Error) {
	return _create(name);
}

open :: proc(name: string) -> (Handle, Error) {
	return _open(name);
}

open_file :: proc(name: string, flag: int, perm: File_Mode) -> (Handle, Error) {
	return _open_file(name, flag, perm);
}

close :: proc(fd: Handle) -> Error {
	return _close(fd);
}

name :: proc(fd: Handle, allocator := context.allocator) -> string {
	return _name(fd);
}

seek :: proc(fd: Handle, offset: i64, whence: Seek_From) -> (ret: i64, err: Error) {
	return _seek(fd, offset, whence);
}

read :: proc(fd: Handle, p: []byte) -> (n: int, err: Error) {
	return _read(fd, p);
}

read_at :: proc(fd: Handle, p: []byte, offset: i64) -> (n: int, err: Error) {
	return _read_at(fd, p, offset);
}

read_from :: proc(fd: Handle, r: io.Reader) -> (n: i64, err: Error) {
	return _read_from(fd, r);
}

write :: proc(fd: Handle, p: []byte) -> (n: int, err: Error) {
	return _write(fd, p);
}

write_at :: proc(fd: Handle, p: []byte, offset: i64) -> (n: int, err: Error) {
	return _write_at(fd, p, offset);
}

write_to :: proc(fd: Handle, w: io.Writer) -> (n: i64, err: Error) {
	return _write_to(fd, w);
}

file_size :: proc(fd: Handle) -> (n: i64, err: Error) {
	return _file_size(fd);
}


sync :: proc(fd: Handle) -> Error {
	return _sync(fd);
}

flush :: proc(fd: Handle) -> Error {
	return _flush(fd);
}

truncate :: proc(fd: Handle, size: i64) -> Maybe(Path_Error) {
	return _truncate(fd, size);
}

remove :: proc(name: string) -> Maybe(Path_Error) {
	return _remove(name);
}

rename :: proc(old_path, new_path: string) -> Maybe(Path_Error) {
	return _rename(old_path, new_path);
}


link :: proc(old_name, new_name: string) -> Maybe(Link_Error) {
	return _link(old_name, new_name);
}

symlink :: proc(old_name, new_name: string) -> Maybe(Link_Error) {
	return _symlink(old_name, new_name);
}

read_link :: proc(name: string) -> (string, Maybe(Path_Error)) {
	return _read_link(name);
}


chdir :: proc(fd: Handle) -> Error {
	return _chdir(fd);
}

chmod :: proc(fd: Handle, mode: File_Mode) -> Error {
	return _chmod(fd, mode);
}

chown :: proc(fd: Handle, uid, gid: int) -> Error {
	return _chown(fd, uid, gid);
}


lchown :: proc(name: string, uid, gid: int) -> Error {
	return _lchown(name, uid, gid);
}


chtimes :: proc(name: string, atime, mtime: time.Time) -> Maybe(Path_Error) {
	return _chtimes(name, atime, mtime);
}

exists :: proc(path: string) -> bool {
	return _exists(path);
}

is_file :: proc(path: string) -> bool {
	return _is_file(path);
}

is_dir :: proc(path: string) -> bool {
	return _is_dir(path);
}