/*
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library.  If not, see
 * <http://www.gnu.org/licenses/>.
 *
 * Sahid Orentino Ferdjaoui <sahid.ferdjaoui@redhat.com>
 */

#![allow(improper_ctypes)]

extern crate libc;

use std::ffi::{CString, CStr};
use std::ptr;

use connect::sys::virConnectPtr;

use connect::Connect;
use error::Error;

pub mod sys {
    #[allow(non_camel_case_types)]
    #[repr(C)]
    pub struct virSecret {}

    #[allow(non_camel_case_types)]
    pub type virSecretPtr = *mut virSecret;
}

#[link(name = "virt")]
extern "C" {
    fn virSecretLookupByUUIDString(c: virConnectPtr,
                                   uuid: *const libc::c_char)
                                   -> sys::virSecretPtr;
    fn virSecretLookupByUsage(c: virConnectPtr,
                              usaget: libc::c_int,
                              usageid: *const libc::c_char)
                              -> sys::virSecretPtr;
    fn virSecretUndefine(ptr: sys::virSecretPtr) -> libc::c_int;
    fn virSecretFree(ptr: sys::virSecretPtr) -> libc::c_int;
    fn virSecretGetName(ptr: sys::virSecretPtr) -> *const libc::c_char;
    fn virSecretGetUUIDString(ptr: sys::virSecretPtr, uuid: *mut libc::c_char) -> libc::c_int;
    fn virSecretGetUsageID(ptr: sys::virSecretPtr) -> *const libc::c_char;
    fn virSecretGetXMLDesc(ptr: sys::virSecretPtr, flags: libc::c_uint) -> *const libc::c_char;

    fn virSecretSetValue(ptr: sys::virSecretPtr,
                         value: *const libc::c_uchar,
                         vsize: libc::c_uint,
                         flags: libc::c_uint)
                         -> libc::c_int;
    fn virSecretGetValue(ptr: sys::virSecretPtr,
                         vsize: libc::c_uint,
                         flags: libc::c_uint)
                         -> *const libc::c_uchar;
    fn virSecretGetConnect(ptr: sys::virSecretPtr) -> virConnectPtr;
    fn virSecretGetUsageType(ptr: sys::virSecretPtr) -> libc::c_int;
    fn virSecretDefineXML(c: virConnectPtr,
                          xml: *const libc::c_char,
                          flags: libc::c_uint)
                          -> sys::virSecretPtr;
}

pub type SecretXMLFlags = self::libc::c_uint;
pub const VIR_SECRET_XML_INACTIVE: SecretXMLFlags = 1 << 0;

pub type SecretSecretUsageType = self::libc::c_uint;
pub const VIR_SECRET_USAGE_TYPE_NONE: SecretSecretUsageType = 0;
pub const VIR_SECRET_USAGE_TYPE_VOLUME: SecretSecretUsageType = 1;
pub const VIR_SECRET_USAGE_TYPE_CEPH: SecretSecretUsageType = 2;
pub const VIR_SECRET_USAGE_TYPE_ISCSI: SecretSecretUsageType = 3;
pub const VIR_SECRET_USAGE_TYPE_TLS: SecretSecretUsageType = 4;

pub type SecretsFlags = self::libc::c_uint;
pub const VIR_CONNECT_LIST_SECRETS_EPHEMERAL: SecretsFlags = 1 << 0;
pub const VIR_CONNECT_LIST_SECRETS_NO_EPHEMERAL: SecretsFlags = 1 << 1;
pub const VIR_CONNECT_LIST_SECRETS_PRIVATE: SecretsFlags = 1 << 2;
pub const VIR_CONNECT_LIST_SECRETS_NO_PRIVATE: SecretsFlags = 1 << 3;


pub struct Secret {
    ptr: sys::virSecretPtr,
}

impl Drop for Secret {
    fn drop(&mut self) {
        if !self.ptr.is_null() {
            if self.free().is_err() {
                panic!("Unable to drop memory for Secret")
            }
            return;
        }
    }
}

impl Secret {
    pub fn new(ptr: sys::virSecretPtr) -> Secret {
        return Secret { ptr: ptr };
    }

    pub fn get_connect(&self) -> Result<Connect, Error> {
        unsafe {
            let ptr = virSecretGetConnect(self.ptr);
            if ptr.is_null() {
                return Err(Error::new());
            }
            return Ok(Connect::new(ptr));
        }
    }

    pub fn define_xml(conn: &Connect, xml: &str, flags: u32) -> Result<Secret, Error> {
        unsafe {
            let ptr = virSecretDefineXML(conn.as_ptr(),
                                         CString::new(xml).unwrap().as_ptr(),
                                         flags as libc::c_uint);
            if ptr.is_null() {
                return Err(Error::new());
            }
            return Ok(Secret::new(ptr));
        }
    }

    pub fn lookup_by_uuid_string(conn: &Connect, uuid: &str) -> Result<Secret, Error> {
        unsafe {
            let ptr = virSecretLookupByUUIDString(conn.as_ptr(),
                                                  CString::new(uuid).unwrap().as_ptr());
            if ptr.is_null() {
                return Err(Error::new());
            }
            return Ok(Secret::new(ptr));
        }
    }

    pub fn lookup_by_usage(conn: &Connect, usagetype: i32, usageid: &str) -> Result<Secret, Error> {
        unsafe {
            let ptr = virSecretLookupByUsage(conn.as_ptr(),
                                             usagetype as libc::c_int,
                                             CString::new(usageid).unwrap().as_ptr());
            if ptr.is_null() {
                return Err(Error::new());
            }
            return Ok(Secret::new(ptr));
        }
    }

    pub fn get_name(&self) -> Result<String, Error> {
        unsafe {
            let n = virSecretGetName(self.ptr);
            if n.is_null() {
                return Err(Error::new());
            }
            return Ok(CStr::from_ptr(n).to_string_lossy().into_owned());
        }
    }

    pub fn get_usage_id(&self) -> Result<String, Error> {
        unsafe {
            let n = virSecretGetUsageID(self.ptr);
            if n.is_null() {
                return Err(Error::new());
            }
            return Ok(CStr::from_ptr(n).to_string_lossy().into_owned());
        }
    }

    pub fn get_usage_type(&self) -> Result<u32, Error> {
        unsafe {
            let t = virSecretGetUsageType(self.ptr);
            if t == -1 {
                return Err(Error::new());
            }
            return Ok(t as u32);
        }
    }

    pub fn get_uuid_string(&self) -> Result<String, Error> {
        unsafe {
            let uuid: *mut libc::c_char = ptr::null_mut();
            if virSecretGetUUIDString(self.ptr, uuid) == -1 {
                return Err(Error::new());
            }
            return Ok(CStr::from_ptr(uuid).to_string_lossy().into_owned());
        }
    }

    pub fn get_xml_desc(&self, flags: SecretXMLFlags) -> Result<String, Error> {
        unsafe {
            let xml = virSecretGetXMLDesc(self.ptr, flags);
            if xml.is_null() {
                return Err(Error::new());
            }
            return Ok(CStr::from_ptr(xml).to_string_lossy().into_owned());
        }
    }

    pub fn set_value(&self, value: &[u8], flags: u32) -> Result<(), Error> {
        unsafe {
            if virSecretSetValue(self.ptr, value.as_ptr(), value.len() as libc::c_uint, flags) ==
               -1 {
                return Err(Error::new());
            }
            return Ok(());
        }
    }

    pub fn get_value(&self, size: isize, flags: u32) -> Result<Vec<u8>, Error> {
        unsafe {
            let n = virSecretGetValue(self.ptr, size as libc::c_uint, flags as libc::c_uint);
            if n.is_null() {
                return Err(Error::new());
            }

            let mut array: Vec<u8> = Vec::new();
            for x in 0..size {
                array.push(*n.offset(x))
            }
            return Ok(array);
        }
    }

    pub fn undefine(&self) -> Result<(), Error> {
        unsafe {
            if virSecretUndefine(self.ptr) == -1 {
                return Err(Error::new());
            }
            return Ok(());
        }
    }

    pub fn free(&mut self) -> Result<(), Error> {
        unsafe {
            if virSecretFree(self.ptr) == -1 {
                return Err(Error::new());
            }
            self.ptr = ptr::null_mut();
            return Ok(());
        }
    }
}