use crate::{backend, io, path};

use backend::c;

use backend::fd::AsFd;

use bitflags::bitflags;

bitflags! {

    /// `XATTR_*` constants for use with [`setxattr`], and other `*setxattr`

    /// functions.

    #[repr(transparent)]

    #[derive(Copy, Clone, Eq, PartialEq, Hash, Debug)]

    pub struct XattrFlags: c::c_uint {

        /// `XATTR_CREATE`

        const CREATE = c::XATTR_CREATE as c::c_uint;

        /// `XATTR_REPLACE`

        const REPLACE = c::XATTR_REPLACE as c::c_uint;

        /// <https://docs.rs/bitflags/*/bitflags/#externally-defined-flags>

        const _ = !0;

    }

}

/// `getxattr(path, name, value.as_ptr(), value.len())`—Get extended

/// filesystem attributes.

///

/// # References

///  - [Linux]

///

/// [Linux]: https://man7.org/linux/man-pages/man2/getxattr.2.html

#[inline]

pub fn getxattr<P: path::Arg, Name: path::Arg>(

    path: P,

    name: Name,

    value: &mut [u8],

) -> io::Result<usize> {

    path.into_with_c_str(|path| {

        name.into_with_c_str(|name| backend::fs::syscalls::getxattr(path, name, value))

    })

}

/// `lgetxattr(path, name, value.as_ptr(), value.len())`—Get extended

/// filesystem attributes, without following symlinks in the last path

/// component.

///

/// # References

///  - [Linux]

///

/// [Linux]: https://man7.org/linux/man-pages/man2/lgetxattr.2.html

#[inline]

pub fn lgetxattr<P: path::Arg, Name: path::Arg>(

    path: P,

    name: Name,

    value: &mut [u8],

) -> io::Result<usize> {

    path.into_with_c_str(|path| {

        name.into_with_c_str(|name| backend::fs::syscalls::lgetxattr(path, name, value))

    })

}

/// `fgetxattr(fd, name, value.as_ptr(), value.len())`—Get extended

/// filesystem attributes on an open file descriptor.

///

/// # References

///  - [Linux]

///

/// [Linux]: https://man7.org/linux/man-pages/man2/fgetxattr.2.html

#[inline]

pub fn fgetxattr<Fd: AsFd, Name: path::Arg>(

    fd: Fd,

    name: Name,

    value: &mut [u8],

) -> io::Result<usize> {

    name.into_with_c_str(|name| backend::fs::syscalls::fgetxattr(fd.as_fd(), name, value))

}

/// `setxattr(path, name, value.as_ptr(), value.len(), flags)`—Set extended

/// filesystem attributes.

///

/// # References

///  - [Linux]

///

/// [Linux]: https://man7.org/linux/man-pages/man2/setxattr.2.html

#[inline]

pub fn setxattr<P: path::Arg, Name: path::Arg>(

    path: P,

    name: Name,

    value: &[u8],

    flags: XattrFlags,

) -> io::Result<()> {

    path.into_with_c_str(|path| {

        name.into_with_c_str(|name| backend::fs::syscalls::setxattr(path, name, value, flags))

    })

}

/// `setxattr(path, name, value.as_ptr(), value.len(), flags)`—Set extended

/// filesystem attributes, without following symlinks in the last path

/// component.

///

/// # References

///  - [Linux]

///

/// [Linux]: https://man7.org/linux/man-pages/man2/lsetxattr.2.html

#[inline]

pub fn lsetxattr<P: path::Arg, Name: path::Arg>(

    path: P,

    name: Name,

    value: &[u8],

    flags: XattrFlags,

) -> io::Result<()> {

    path.into_with_c_str(|path| {

        name.into_with_c_str(|name| backend::fs::syscalls::lsetxattr(path, name, value, flags))

    })

}

/// `fsetxattr(fd, name, value.as_ptr(), value.len(), flags)`—Set extended

/// filesystem attributes on an open file descriptor.

///

/// # References

///  - [Linux]

///

/// [Linux]: https://man7.org/linux/man-pages/man2/fsetxattr.2.html

#[inline]

pub fn fsetxattr<Fd: AsFd, Name: path::Arg>(

    fd: Fd,

    name: Name,

    value: &[u8],

    flags: XattrFlags,

) -> io::Result<()> {

    name.into_with_c_str(|name| backend::fs::syscalls::fsetxattr(fd.as_fd(), name, value, flags))

}

/// `listxattr(path, list.as_ptr(), list.len())`—List extended filesystem

/// attributes.

///

/// # References

///  - [Linux]

///

/// [Linux]: https://man7.org/linux/man-pages/man2/listxattr.2.html

#[inline]

pub fn listxattr<P: path::Arg>(path: P, list: &mut [c::c_char]) -> io::Result<usize> {

    path.into_with_c_str(|path| backend::fs::syscalls::listxattr(path, list))

}

/// `llistxattr(path, list.as_ptr(), list.len())`—List extended filesystem

/// attributes, without following symlinks in the last path component.

///

/// # References

///  - [Linux]

///

/// [Linux]: https://man7.org/linux/man-pages/man2/llistxattr.2.html

#[inline]

pub fn llistxattr<P: path::Arg>(path: P, list: &mut [c::c_char]) -> io::Result<usize> {

    path.into_with_c_str(|path| backend::fs::syscalls::llistxattr(path, list))

}

/// `flistxattr(fd, list.as_ptr(), list.len())`—List extended filesystem

/// attributes on an open file descriptor.

///

/// # References

///  - [Linux]

///

/// [Linux]: https://man7.org/linux/man-pages/man2/flistxattr.2.html

#[inline]

pub fn flistxattr<Fd: AsFd>(fd: Fd, list: &mut [c::c_char]) -> io::Result<usize> {

    backend::fs::syscalls::flistxattr(fd.as_fd(), list)

}

/// `removexattr(path, name)`—Remove an extended filesystem attribute.

///

/// # References

///  - [Linux]

///

/// [Linux]: https://man7.org/linux/man-pages/man2/removexattr.2.html

pub fn removexattr<P: path::Arg, Name: path::Arg>(path: P, name: Name) -> io::Result<()> {

    path.into_with_c_str(|path| {

        name.into_with_c_str(|name| backend::fs::syscalls::removexattr(path, name))

    })

}

/// `lremovexattr(path, name)`—Remove an extended filesystem attribute,

/// without following symlinks in the last path component.

///

/// # References

///  - [Linux]

///

/// [Linux]: https://man7.org/linux/man-pages/man2/lremovexattr.2.html

pub fn lremovexattr<P: path::Arg, Name: path::Arg>(path: P, name: Name) -> io::Result<()> {

    path.into_with_c_str(|path| {

        name.into_with_c_str(|name| backend::fs::syscalls::lremovexattr(path, name))

    })

}

/// `fremovexattr(fd, name)`—Remove an extended filesystem attribute on an

/// open file descriptor.

///

/// # References

///  - [Linux]

///

/// [Linux]: https://man7.org/linux/man-pages/man2/fremovexattr.2.html

pub fn fremovexattr<Fd: AsFd, Name: path::Arg>(fd: Fd, name: Name) -> io::Result<()> {

    name.into_with_c_str(|name| backend::fs::syscalls::fremovexattr(fd.as_fd(), name))

}