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// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at http://mozilla.org/MPL/2.0/.

use std::path::Path;

use crate::{device::CryptDevice, err::LibcryptErr, format::EncryptionFormat};

/// Handle for backup operations on a device
pub struct CryptBackup<'a> {
    reference: &'a mut CryptDevice,
}

impl<'a> CryptBackup<'a> {
    pub(crate) fn new(reference: &'a mut CryptDevice) -> Self {
        CryptBackup { reference }
    }

    /// Back up header and keyslots to a file
    pub fn header_backup(
        &mut self,
        requested_type: EncryptionFormat,
        backup_file: &Path,
    ) -> Result<(), LibcryptErr> {
        let backup_file_cstring = path_to_cstring!(backup_file)?;
        errno!(unsafe {
            libcryptsetup_rs_sys::crypt_header_backup(
                self.reference.as_ptr(),
                requested_type.as_ptr(),
                backup_file_cstring.as_ptr(),
            )
        })
    }

    /// Restore header and keyslots from a file
    pub fn header_restore(
        &mut self,
        requested_type: EncryptionFormat,
        backup_file: &Path,
    ) -> Result<(), LibcryptErr> {
        let backup_file_cstring = path_to_cstring!(backup_file)?;
        errno!(unsafe {
            libcryptsetup_rs_sys::crypt_header_restore(
                self.reference.as_ptr(),
                requested_type.as_ptr(),
                backup_file_cstring.as_ptr(),
            )
        })
    }
}