// This source file is generated automatically from damage.xml

use crate::base::{self, BaseError, BaseEvent, GeEvent, Reply, Wired, Xid};
use crate::ext;
use crate::ffi::base::*;
use crate::ffi::ext::*;
use crate::lat1_str::{Lat1Str, Lat1String, Lat1StrF};
use crate::xproto;
use crate::xfixes;
use crate::render;
use crate::shape;
use crate::xproto::PropEl;

use bitflags::bitflags;
use libc::{self, iovec};
use std::convert::TryInto;
use std::os::unix::prelude::RawFd;

/// The official identifier for the `Damage` extension.
pub const XNAME: &str = "DAMAGE";
/// The major version of the `Damage` extension.
pub const MAJOR_VERSION: u32 = 1;
/// The minor version of the `Damage` extension.
pub const MINOR_VERSION: u32 = 1;
/// The version string of the `Damage` extension.
pub const VERSION_STRING: &str = "1.1";

pub(crate) static mut FFI_EXT: xcb_extension_t = xcb_extension_t {
    name: "DAMAGE\0".as_ptr() as *const _,
    global_id: 0,
};

/// Prefetch server runtime info data of the `Damage` extension.
pub fn prefetch_extension_data(conn: &base::Connection) {
    unsafe {
        xcb_prefetch_extension_data(conn.get_raw_conn(), &mut FFI_EXT as *mut _);
    }
}

/// Fetch server runtime info data of the `Damage` extension.
///
/// Might be non-blocking if [prefetch_extension_data] was called before.
/// This function is of seldom use as the extensions are initialized by the
/// [Connection](crate::Connection) constructor.
pub fn get_extension_data(conn: &base::Connection) -> std::option::Option<ext::ExtensionData> {
    unsafe {
        let reply = xcb_get_extension_data(conn.get_raw_conn(), &mut FFI_EXT as *mut _);
        assert!(!reply.is_null(), "Could not fetch Damage extension data");
        let reply = xproto::QueryExtensionReply::from_raw(reply);
        if !reply.present() {
            std::mem::forget(reply);
            return None;
        }
        let res = ext::ExtensionData{
            ext: ext::Extension::Damage,
            major_opcode: reply.major_opcode(),
            first_event: reply.first_event(),
            first_error: reply.first_error(),
        };
        std::mem::forget(reply);
        Some(res)
    }
}

/// The `BadDamageError` error.
pub struct BadDamageError {
    raw: *mut xcb_generic_error_t,
}

impl base::BaseError for BadDamageError {
    const EXTENSION: std::option::Option<ext::Extension> = Some(ext::Extension::Damage);

    const NUMBER: u32 = 0;

    unsafe fn from_raw(raw: *mut xcb_generic_error_t) -> Self { BadDamageError { raw } }

    unsafe fn into_raw(self) -> *mut xcb_generic_error_t {
        let raw = self.raw;
        std::mem::forget(self);
        raw
    }

    fn as_raw(&self) -> *mut xcb_generic_error_t {
        self.raw
    }

    fn as_slice(&self) -> &[u8] {
        unsafe {
            std::slice::from_raw_parts(self.raw as *const u8, 4usize)
        }
    }
}

impl BadDamageError {
    fn wire_ptr(&self) -> *const u8 { self.raw as *const u8 }

    fn wire_len(&self) -> usize { 32 }

    pub fn response_type(&self) -> u8 {
        unsafe {
            let offset = 0usize;
            let ptr = self.wire_ptr().add(offset) as *const u8;
            *ptr
        }
    }

    pub fn error_code(&self) -> u8 {
        unsafe {
            let offset = 1usize;
            let ptr = self.wire_ptr().add(offset) as *const u8;
            *ptr
        }
    }

    pub fn sequence(&self) -> u16 {
        unsafe {
            let offset = 2usize;
            let ptr = self.wire_ptr().add(offset) as *const u16;
            *ptr
        }
    }
}

impl std::fmt::Debug for BadDamageError {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        f.debug_struct("BadDamageError")
            .field("response_type", &self.response_type())
            .field("error_code", &self.error_code())
            .field("sequence", &self.sequence())
            .finish()
    }
}

impl Drop for BadDamageError {
    fn drop(&mut self) {
        unsafe { libc::free(self.raw as *mut _); }
    }
}

unsafe impl Send for BadDamageError {}
unsafe impl Sync for BadDamageError {}

/// Unified error type for the Damage extension
#[derive(Debug)]
pub enum Error {
    BadDamage(BadDamageError),
}

impl base::ResolveWireError for Error {
    unsafe fn resolve_wire_error(first_error: u8, raw: *mut xcb_generic_error_t) -> Self {
        debug_assert!(!raw.is_null());
        let error_code = (*raw).error_code;
        match error_code - first_error {
            0 => Error::BadDamage(BadDamageError::from_raw(raw)),
            _ => unreachable!(
                "Could not resolve damage Error with error_code {} and first_error {}",
                error_code, first_error
            ),
        }
    }
}

/// The `NotifyEvent` event.
pub struct NotifyEvent {
    raw: *mut xcb_generic_event_t,
}

impl base::BaseEvent for NotifyEvent {
    const EXTENSION: std::option::Option<ext::Extension> = Some(ext::Extension::Damage);
    const NUMBER: u32 = 0;

    unsafe fn from_raw(raw: *mut xcb_generic_event_t) -> Self { NotifyEvent { raw } }

    unsafe fn into_raw(self) -> *mut xcb_generic_event_t {
        let raw = self.raw;
        std::mem::forget(self);
        raw
    }

    fn as_raw(&self) -> *mut xcb_generic_event_t {
        self.raw
    }

    fn as_slice(&self) -> &[u8] {
        unsafe {
            std::slice::from_raw_parts(self.raw as *const u8, self.wire_len())
        }
    }
}

impl NotifyEvent {
    pub fn new(event_base: u8,
        level: u8,
        drawable: xproto::Drawable,
        damage: Damage,
        timestamp: xproto::Timestamp,
        area: xproto::Rectangle,
        geometry: xproto::Rectangle,
    ) -> NotifyEvent {
        unsafe {
            let ptr = libc::malloc(32) as *mut u8;
            let wire_buf = std::slice::from_raw_parts_mut(ptr, 32);
            let mut wire_off = 0usize;
            let response_type = event_base;
            let sequence = 0u16;

            wire_off += response_type.serialize(&mut wire_buf[wire_off ..]);
            wire_off += level.serialize(&mut wire_buf[wire_off ..]);
            wire_off += sequence.serialize(&mut wire_buf[wire_off ..]);
            wire_off += drawable.serialize(&mut wire_buf[wire_off ..]);
            wire_off += damage.serialize(&mut wire_buf[wire_off ..]);
            wire_off += timestamp.serialize(&mut wire_buf[wire_off ..]);
            wire_off += area.serialize(&mut wire_buf[wire_off ..]);
            geometry.serialize(&mut wire_buf[wire_off ..]);

            NotifyEvent::from_raw(ptr as *mut xcb_generic_event_t)
        }
    }

    fn wire_ptr(&self) -> *const u8 { self.raw as *const u8 }

    pub fn response_type(&self) -> u8 {
        unsafe {
            let offset = 0usize;
            let ptr = self.wire_ptr().add(offset) as *const u8;
            *ptr
        }
    }

    pub fn level(&self) -> ReportLevel {
        unsafe {
            let offset = 1usize;
            let ptr = self.wire_ptr().add(offset) as *const u8;
            let val = *ptr as u32;
            std::mem::transmute::<u32, ReportLevel>(val)
        }
    }

    pub fn sequence(&self) -> u16 {
        unsafe {
            let offset = 2usize;
            let ptr = self.wire_ptr().add(offset) as *const u16;
            *ptr
        }
    }

    fn drawable(&self) -> xproto::Drawable {
        unsafe {
            let offset = 4usize;
            let res_id = *(self.wire_ptr().add(offset) as *const u32);
            xproto::Drawable::Unknown(res_id)
        }
    }

    pub fn damage(&self) -> Damage {
        unsafe {
            let offset = 8usize;
            let ptr = self.wire_ptr().add(offset) as *const Damage;
            *ptr
        }
    }

    pub fn timestamp(&self) -> xproto::Timestamp {
        unsafe {
            let offset = 12usize;
            let ptr = self.wire_ptr().add(offset) as *const xproto::Timestamp;
            *ptr
        }
    }

    pub fn area(&self) -> xproto::Rectangle {
        unsafe {
            let offset = 16usize;
            let ptr = self.wire_ptr().add(offset) as *const xproto::Rectangle;
            *ptr
        }
    }

    pub fn geometry(&self) -> xproto::Rectangle {
        unsafe {
            let offset = 24usize;
            let ptr = self.wire_ptr().add(offset) as *const xproto::Rectangle;
            *ptr
        }
    }
}

impl std::fmt::Debug for NotifyEvent {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        f.debug_struct("NotifyEvent")
            .field("response_type", &self.response_type())
            .field("level", &self.level())
            .field("sequence", &self.sequence())
            .field("drawable", &self.drawable())
            .field("damage", &self.damage())
            .field("timestamp", &self.timestamp())
            .field("area", &self.area())
            .field("geometry", &self.geometry())
            .finish()
    }
}

impl base::Wired for NotifyEvent {
    type Params = ();

    unsafe fn compute_wire_len(_ptr: *const u8, _params: ()) -> usize {
        32
    }

    fn wire_len(&self) -> usize {
        32usize
    }

    fn serialize(&self, wire_buf: &mut[u8]) -> usize {
        debug_assert!(wire_buf.len() >= self.wire_len());
        (&mut wire_buf[0 .. self.wire_len()]).copy_from_slice(self.as_slice());
        self.wire_len()
    }
}

impl Drop for NotifyEvent {
    fn drop(&mut self) {
        unsafe { libc::free(self.raw as *mut _); }
    }
}

unsafe impl Send for NotifyEvent {}
unsafe impl Sync for NotifyEvent {}

/// Unified event type for the Damage extension
#[derive(Debug)]
pub enum Event {
    Notify(NotifyEvent),
}

impl base::ResolveWireEvent for Event {
    unsafe fn resolve_wire_event(first_event: u8, raw: *mut xcb_generic_event_t) -> Self {
        debug_assert!(!raw.is_null());
        let response_type = (*raw).response_type & 0x7F;
        debug_assert!(response_type != 0, "This is not an event but an error!");
        debug_assert!(response_type != XCB_GE_GENERIC, "This is a GE_GENERIC event!");
        match response_type - first_event {
            0 => Event::Notify(NotifyEvent::from_raw(raw)),
            _ => unreachable!(
                "Could not resolve damage Event with response_type {} and first_event {}",
                response_type, first_event
            ),
        }
    }
}

#[derive(Copy, Clone, Debug, PartialEq, Eq)]
#[repr(C)]
pub struct Damage {
    res_id: u32,
}

impl base::Xid for Damage {
    fn none() -> Self { Damage { res_id: 0 } }
    fn resource_id(&self) -> u32 { self.res_id }
}

impl base::XidNew for Damage {
    unsafe fn new(res_id: u32) -> Self { Damage { res_id } }
}

#[test]
fn test_sizeof_damage() {
    assert_eq!(std::mem::size_of::<Damage>(), 4);
}

#[derive(Copy, Clone, Debug, PartialEq)]
#[repr(u32)]
pub enum ReportLevel {
    RawRectangles = 0,
    DeltaRectangles = 1,
    BoundingBox = 2,
    NonEmpty = 3,
}

pub(crate) fn request_name(opcode: u16) -> std::option::Option<&'static str> {
    match opcode {
        0 => Some("damage::QueryVersion"),
        1 => Some("damage::Create"),
        2 => Some("damage::Destroy"),
        3 => Some("damage::Subtract"),
        4 => Some("damage::Add"),
        _ => None,
    }
}

/// Reply type for [QueryVersion].
///
/// Can be obtained from a [QueryVersionCookie] with [Connection::wait_for_reply](crate::Connection::wait_for_reply)
/// or from a [QueryVersionCookieUnchecked] with [Connection::wait_for_reply_unchecked](crate::Connection::wait_for_reply_unchecked)
pub struct QueryVersionReply {
    raw: *const u8,
}

impl QueryVersionReply {

    fn wire_ptr(&self) -> *const u8 {
        self.raw
    }

    fn wire_len(&self) -> usize {
        (32 + self.length() * 4) as _
    }

    pub fn response_type(&self) -> u8 {
        unsafe {
            let offset = 0usize;
            let ptr = self.wire_ptr().add(offset) as *const u8;
            *ptr
        }
    }


    pub fn sequence(&self) -> u16 {
        unsafe {
            let offset = 2usize;
            let ptr = self.wire_ptr().add(offset) as *const u16;
            *ptr
        }
    }

    pub fn length(&self) -> u32 {
        unsafe {
            let offset = 4usize;
            let ptr = self.wire_ptr().add(offset) as *const u32;
            *ptr
        }
    }

    pub fn major_version(&self) -> u32 {
        unsafe {
            let offset = 8usize;
            let ptr = self.wire_ptr().add(offset) as *const u32;
            *ptr
        }
    }

    pub fn minor_version(&self) -> u32 {
        unsafe {
            let offset = 12usize;
            let ptr = self.wire_ptr().add(offset) as *const u32;
            *ptr
        }
    }

}

impl base::Reply for QueryVersionReply {
    unsafe fn from_raw(raw: *const u8) -> Self {
        Self { raw }
    }

    unsafe fn into_raw(self) -> *const u8 {
        let raw = self.raw;
        std::mem::forget(self);
        raw
    }
}

impl std::fmt::Debug for QueryVersionReply {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        f.debug_struct("QueryVersionReply")
            .field("response_type", &self.response_type())
            .field("pad", &1)
            .field("sequence", &self.sequence())
            .field("length", &self.length())
            .field("major_version", &self.major_version())
            .field("minor_version", &self.minor_version())
            .field("pad", &16)
            .finish()
    }
}

impl Drop for QueryVersionReply {
    fn drop(&mut self) {
        unsafe { libc::free(self.raw as *mut _); }
    }
}

unsafe impl std::marker::Send for QueryVersionReply {}
unsafe impl std::marker::Sync for QueryVersionReply {}

/// Cookie type for [QueryVersion].
///
/// This cookie can be used to get a [QueryVersionReply]
/// with [Connection::wait_for_reply](crate::Connection::wait_for_reply)
#[derive(Debug)]
pub struct QueryVersionCookie {
    seq: u64,
}

#[derive(Debug)]
/// Unchecked cookie type for [QueryVersion].
///
/// This cookie can be used to get a [QueryVersionReply]
/// with [Connection::wait_for_reply_unchecked](crate::Connection::wait_for_reply_unchecked)
pub struct QueryVersionCookieUnchecked {
    seq: u64,
}

impl base::Cookie for QueryVersionCookie {
    unsafe fn from_sequence(seq: u64) -> Self {
        QueryVersionCookie { seq }
    }

    fn sequence(&self) -> u64 {
        self.seq
    }
}

unsafe impl base::CookieChecked for QueryVersionCookie {
}

unsafe impl base::CookieWithReplyChecked for QueryVersionCookie {
    type Reply = QueryVersionReply;
}

impl base::Cookie for QueryVersionCookieUnchecked {
    unsafe fn from_sequence(seq: u64) -> Self {
        QueryVersionCookieUnchecked { seq }
    }

    fn sequence(&self) -> u64 {
        self.seq
    }
}

unsafe impl base::CookieWithReplyUnchecked for QueryVersionCookieUnchecked {
    type Reply = QueryVersionReply;
}

/// The `QueryVersion` request.
///
/// This request replies [QueryVersionReply].
///
/// Associated cookie types are [QueryVersionCookie] and [QueryVersionCookieUnchecked].
#[derive(Clone, Debug)]
pub struct QueryVersion {
    pub client_major_version: u32,
    pub client_minor_version: u32,
}

unsafe impl base::RawRequest for QueryVersion {
    fn raw_request(&self, c: &base::Connection, checked: bool) -> u64 { unsafe {
        let mut protocol_request = xcb_protocol_request_t {
            count: 2,
            ext: (&mut FFI_EXT) as *mut _,
            opcode: 0,
            isvoid: 0,
        };

        let mut sections: [iovec; 4] = [iovec {
            iov_base: std::ptr::null_mut(),
            iov_len: 0,
        }; 4];

        let buf0: &mut [u8] = &mut [0; 12];
        self.client_major_version.serialize(&mut buf0[4 .. ]);
        self.client_minor_version.serialize(&mut buf0[8 .. ]);
        sections[2].iov_base = buf0.as_mut_ptr() as *mut _;
        sections[2].iov_len = 12;
        sections[3].iov_len = base::align_pad(sections[2].iov_len, 4);

        let flags = if checked { base::RequestFlags::CHECKED } else { base::RequestFlags::NONE };

        xcb_send_request64(
            c.get_raw_conn(),
            flags.bits() as _,
            sections.as_mut_ptr().add(2),
            &mut protocol_request as *mut _,
        )
    }
}}

impl base::Request for QueryVersion {
    type Cookie = QueryVersionCookie;
    const IS_VOID: bool = false;
}

impl base::RequestWithReply for QueryVersion {
    type Reply = QueryVersionReply;
    type Cookie = QueryVersionCookie;
    type CookieUnchecked = QueryVersionCookieUnchecked;
}

/// The `Create` request.
///
/// This request has no reply.
///
/// Associated cookie types are [VoidCookie](crate::VoidCookie) and [VoidCookieChecked](crate::VoidCookieChecked).
#[derive(Clone, Debug)]
pub struct Create {
    pub damage: Damage,
    pub drawable: xproto::Drawable,
    pub level: ReportLevel,
}

unsafe impl base::RawRequest for Create {
    fn raw_request(&self, c: &base::Connection, checked: bool) -> u64 { unsafe {
        let mut protocol_request = xcb_protocol_request_t {
            count: 2,
            ext: (&mut FFI_EXT) as *mut _,
            opcode: 1,
            isvoid: 1,
        };

        let mut sections: [iovec; 4] = [iovec {
            iov_base: std::ptr::null_mut(),
            iov_len: 0,
        }; 4];

        let buf0: &mut [u8] = &mut [0; 16];
        self.damage.serialize(&mut buf0[4 .. ]);
        self.drawable.serialize(&mut buf0[8 .. ]);
        (std::mem::transmute::<_, u32>(self.level) as u8).serialize(&mut buf0[12 .. ]);
        sections[2].iov_base = buf0.as_mut_ptr() as *mut _;
        sections[2].iov_len = 16;
        sections[3].iov_len = base::align_pad(sections[2].iov_len, 4);

        let flags = if checked { base::RequestFlags::CHECKED } else { base::RequestFlags::NONE };

        xcb_send_request64(
            c.get_raw_conn(),
            flags.bits() as _,
            sections.as_mut_ptr().add(2),
            &mut protocol_request as *mut _,
        )
    }
}}

impl base::Request for Create {
    type Cookie = base::VoidCookie;
    const IS_VOID: bool = true;
}

impl base::RequestWithoutReply for Create {
}

/// The `Destroy` request.
///
/// This request has no reply.
///
/// Associated cookie types are [VoidCookie](crate::VoidCookie) and [VoidCookieChecked](crate::VoidCookieChecked).
#[derive(Clone, Debug)]
pub struct Destroy {
    pub damage: Damage,
}

unsafe impl base::RawRequest for Destroy {
    fn raw_request(&self, c: &base::Connection, checked: bool) -> u64 { unsafe {
        let mut protocol_request = xcb_protocol_request_t {
            count: 2,
            ext: (&mut FFI_EXT) as *mut _,
            opcode: 2,
            isvoid: 1,
        };

        let mut sections: [iovec; 4] = [iovec {
            iov_base: std::ptr::null_mut(),
            iov_len: 0,
        }; 4];

        let buf0: &mut [u8] = &mut [0; 8];
        self.damage.serialize(&mut buf0[4 .. ]);
        sections[2].iov_base = buf0.as_mut_ptr() as *mut _;
        sections[2].iov_len = 8;
        sections[3].iov_len = base::align_pad(sections[2].iov_len, 4);

        let flags = if checked { base::RequestFlags::CHECKED } else { base::RequestFlags::NONE };

        xcb_send_request64(
            c.get_raw_conn(),
            flags.bits() as _,
            sections.as_mut_ptr().add(2),
            &mut protocol_request as *mut _,
        )
    }
}}

impl base::Request for Destroy {
    type Cookie = base::VoidCookie;
    const IS_VOID: bool = true;
}

impl base::RequestWithoutReply for Destroy {
}

/// The `Subtract` request.
///
/// This request has no reply.
///
/// Associated cookie types are [VoidCookie](crate::VoidCookie) and [VoidCookieChecked](crate::VoidCookieChecked).
#[derive(Clone, Debug)]
pub struct Subtract {
    pub damage: Damage,
    pub repair: xfixes::Region,
    pub parts: xfixes::Region,
}

unsafe impl base::RawRequest for Subtract {
    fn raw_request(&self, c: &base::Connection, checked: bool) -> u64 { unsafe {
        let mut protocol_request = xcb_protocol_request_t {
            count: 2,
            ext: (&mut FFI_EXT) as *mut _,
            opcode: 3,
            isvoid: 1,
        };

        let mut sections: [iovec; 4] = [iovec {
            iov_base: std::ptr::null_mut(),
            iov_len: 0,
        }; 4];

        let buf0: &mut [u8] = &mut [0; 16];
        self.damage.serialize(&mut buf0[4 .. ]);
        self.repair.serialize(&mut buf0[8 .. ]);
        self.parts.serialize(&mut buf0[12 .. ]);
        sections[2].iov_base = buf0.as_mut_ptr() as *mut _;
        sections[2].iov_len = 16;
        sections[3].iov_len = base::align_pad(sections[2].iov_len, 4);

        let flags = if checked { base::RequestFlags::CHECKED } else { base::RequestFlags::NONE };

        xcb_send_request64(
            c.get_raw_conn(),
            flags.bits() as _,
            sections.as_mut_ptr().add(2),
            &mut protocol_request as *mut _,
        )
    }
}}

impl base::Request for Subtract {
    type Cookie = base::VoidCookie;
    const IS_VOID: bool = true;
}

impl base::RequestWithoutReply for Subtract {
}

/// The `Add` request.
///
/// This request has no reply.
///
/// Associated cookie types are [VoidCookie](crate::VoidCookie) and [VoidCookieChecked](crate::VoidCookieChecked).
#[derive(Clone, Debug)]
pub struct Add {
    pub drawable: xproto::Drawable,
    pub region: xfixes::Region,
}

unsafe impl base::RawRequest for Add {
    fn raw_request(&self, c: &base::Connection, checked: bool) -> u64 { unsafe {
        let mut protocol_request = xcb_protocol_request_t {
            count: 2,
            ext: (&mut FFI_EXT) as *mut _,
            opcode: 4,
            isvoid: 1,
        };

        let mut sections: [iovec; 4] = [iovec {
            iov_base: std::ptr::null_mut(),
            iov_len: 0,
        }; 4];

        let buf0: &mut [u8] = &mut [0; 12];
        self.drawable.serialize(&mut buf0[4 .. ]);
        self.region.serialize(&mut buf0[8 .. ]);
        sections[2].iov_base = buf0.as_mut_ptr() as *mut _;
        sections[2].iov_len = 12;
        sections[3].iov_len = base::align_pad(sections[2].iov_len, 4);

        let flags = if checked { base::RequestFlags::CHECKED } else { base::RequestFlags::NONE };

        xcb_send_request64(
            c.get_raw_conn(),
            flags.bits() as _,
            sections.as_mut_ptr().add(2),
            &mut protocol_request as *mut _,
        )
    }
}}

impl base::Request for Add {
    type Cookie = base::VoidCookie;
    const IS_VOID: bool = true;
}

impl base::RequestWithoutReply for Add {
}