use super::*;
macro_rules! define_handles {
    (
        'owned: $($oty:ident,)*
        'interned: $($ity:ident,)*
    ) => {
        #[repr(C)]
        #[allow(non_snake_case)]
        pub struct HandleCounters {
            $($oty: AtomicUsize,)*
            $($ity: AtomicUsize,)*
        }
        impl HandleCounters {
            
            pub extern "C" fn get() -> &'static Self {
                static COUNTERS: HandleCounters = HandleCounters {
                    $($oty: AtomicUsize::new(1),)*
                    $($ity: AtomicUsize::new(1),)*
                };
                &COUNTERS
            }
        }
        
        #[repr(C)]
        #[allow(non_snake_case)]
        pub(super) struct HandleStore<S: server::Types> {
            $($oty: handle::OwnedStore<S::$oty>,)*
            $($ity: handle::InternedStore<S::$ity>,)*
        }
        impl<S: server::Types> HandleStore<S> {
            pub(super) fn new(handle_counters: &'static HandleCounters) -> Self {
                HandleStore {
                    $($oty: handle::OwnedStore::new(&handle_counters.$oty),)*
                    $($ity: handle::InternedStore::new(&handle_counters.$ity),)*
                }
            }
        }
        $(
            #[repr(C)]
            pub(crate) struct $oty(handle::Handle);
            impl !Send for $oty {}
            impl !Sync for $oty {}
            
            impl Drop for $oty {
                fn drop(&mut self) {
                    $oty(self.0).drop();
                }
            }
            impl<S> Encode<S> for $oty {
                fn encode(self, w: &mut Writer, s: &mut S) {
                    let handle = self.0;
                    mem::forget(self);
                    handle.encode(w, s);
                }
            }
            impl<S: server::Types> DecodeMut<'_, '_, HandleStore<server::MarkedTypes<S>>>
                for Marked<S::$oty, $oty>
            {
                fn decode(r: &mut Reader<'_>, s: &mut HandleStore<server::MarkedTypes<S>>) -> Self {
                    s.$oty.take(handle::Handle::decode(r, &mut ()))
                }
            }
            impl<S> Encode<S> for &$oty {
                fn encode(self, w: &mut Writer, s: &mut S) {
                    self.0.encode(w, s);
                }
            }
            impl<S: server::Types> Decode<'_, 's, HandleStore<server::MarkedTypes<S>>>
                for &'s Marked<S::$oty, $oty>
            {
                fn decode(r: &mut Reader<'_>, s: &'s HandleStore<server::MarkedTypes<S>>) -> Self {
                    &s.$oty[handle::Handle::decode(r, &mut ())]
                }
            }
            impl<S> Encode<S> for &mut $oty {
                fn encode(self, w: &mut Writer, s: &mut S) {
                    self.0.encode(w, s);
                }
            }
            impl<S: server::Types> DecodeMut<'_, 's, HandleStore<server::MarkedTypes<S>>>
                for &'s mut Marked<S::$oty, $oty>
            {
                fn decode(
                    r: &mut Reader<'_>,
                    s: &'s mut HandleStore<server::MarkedTypes<S>>
                ) -> Self {
                    &mut s.$oty[handle::Handle::decode(r, &mut ())]
                }
            }
            impl<S: server::Types> Encode<HandleStore<server::MarkedTypes<S>>>
                for Marked<S::$oty, $oty>
            {
                fn encode(self, w: &mut Writer, s: &mut HandleStore<server::MarkedTypes<S>>) {
                    s.$oty.alloc(self).encode(w, s);
                }
            }
            impl<S> DecodeMut<'_, '_, S> for $oty {
                fn decode(r: &mut Reader<'_>, s: &mut S) -> Self {
                    $oty(handle::Handle::decode(r, s))
                }
            }
        )*
        $(
            #[repr(C)]
            #[derive(Copy, Clone, PartialEq, Eq, Hash)]
            pub(crate) struct $ity(handle::Handle);
            impl !Send for $ity {}
            impl !Sync for $ity {}
            impl<S> Encode<S> for $ity {
                fn encode(self, w: &mut Writer, s: &mut S) {
                    self.0.encode(w, s);
                }
            }
            impl<S: server::Types> DecodeMut<'_, '_, HandleStore<server::MarkedTypes<S>>>
                for Marked<S::$ity, $ity>
            {
                fn decode(r: &mut Reader<'_>, s: &mut HandleStore<server::MarkedTypes<S>>) -> Self {
                    s.$ity.copy(handle::Handle::decode(r, &mut ()))
                }
            }
            impl<S: server::Types> Encode<HandleStore<server::MarkedTypes<S>>>
                for Marked<S::$ity, $ity>
            {
                fn encode(self, w: &mut Writer, s: &mut HandleStore<server::MarkedTypes<S>>) {
                    s.$ity.alloc(self).encode(w, s);
                }
            }
            impl<S> DecodeMut<'_, '_, S> for $ity {
                fn decode(r: &mut Reader<'_>, s: &mut S) -> Self {
                    $ity(handle::Handle::decode(r, s))
                }
            }
        )*
    }
}
define_handles! {
    'owned:
    TokenStream,
    TokenStreamBuilder,
    TokenStreamIter,
    Group,
    Literal,
    SourceFile,
    MultiSpan,
    Diagnostic,
    'interned:
    Punct,
    Ident,
    Span,
}
impl Clone for TokenStream {
    fn clone(&self) -> Self {
        self.clone()
    }
}
impl Clone for TokenStreamIter {
    fn clone(&self) -> Self {
        self.clone()
    }
}
impl Clone for Group {
    fn clone(&self) -> Self {
        self.clone()
    }
}
impl Clone for Literal {
    fn clone(&self) -> Self {
        self.clone()
    }
}
impl fmt::Debug for Literal {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        f.write_str(&self.debug())
    }
}
impl Clone for SourceFile {
    fn clone(&self) -> Self {
        self.clone()
    }
}
impl fmt::Debug for Span {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        f.write_str(&self.debug())
    }
}
macro_rules! define_client_side {
    ($($name:ident {
        $(fn $method:ident($($arg:ident: $arg_ty:ty),* $(,)?) $(-> $ret_ty:ty)*;)*
    }),* $(,)?) => {
        $(impl $name {
            $(pub(crate) fn $method($($arg: $arg_ty),*) $(-> $ret_ty)* {
                Bridge::with(|bridge| {
                    let mut b = bridge.cached_buffer.take();
                    b.clear();
                    api_tags::Method::$name(api_tags::$name::$method).encode(&mut b, &mut ());
                    reverse_encode!(b; $($arg),*);
                    b = bridge.dispatch.call(b);
                    let r = Result::<_, PanicMessage>::decode(&mut &b[..], &mut ());
                    bridge.cached_buffer = b;
                    r.unwrap_or_else(|e| panic::resume_unwind(e.into()))
                })
            })*
        })*
    }
}
with_api!(self, self, define_client_side);
enum BridgeState<'a> {
    
    NotConnected,
    
    Connected(Bridge<'a>),
    
    
    InUse,
}
enum BridgeStateL {}
impl<'a> scoped_cell::ApplyL<'a> for BridgeStateL {
    type Out = BridgeState<'a>;
}
thread_local! {
    static BRIDGE_STATE: scoped_cell::ScopedCell<BridgeStateL> =
        scoped_cell::ScopedCell::new(BridgeState::NotConnected);
}
impl BridgeState<'_> {
    
    
    
    
    
    
    
    fn with<R>(f: impl FnOnce(&mut BridgeState<'_>) -> R) -> R {
        BRIDGE_STATE.with(|state| {
            state.replace(BridgeState::InUse, |mut state| {
                
                f(&mut *state)
            })
        })
    }
}
impl Bridge<'_> {
    fn enter<R>(self, f: impl FnOnce() -> R) -> R {
        
        
        static HIDE_PANICS_DURING_EXPANSION: Once = Once::new();
        HIDE_PANICS_DURING_EXPANSION.call_once(|| {
            let prev = panic::take_hook();
            panic::set_hook(Box::new(move |info| {
                let hide = BridgeState::with(|state| match state {
                    BridgeState::NotConnected => false,
                    BridgeState::Connected(_) | BridgeState::InUse => true,
                });
                if !hide {
                    prev(info)
                }
            }));
        });
        BRIDGE_STATE.with(|state| state.set(BridgeState::Connected(self), f))
    }
    fn with<R>(f: impl FnOnce(&mut Bridge<'_>) -> R) -> R {
        BridgeState::with(|state| match state {
            BridgeState::NotConnected => {
                panic!("procedural macro API is used outside of a procedural macro");
            }
            BridgeState::InUse => {
                panic!("procedural macro API is used while it's already in use");
            }
            BridgeState::Connected(bridge) => f(bridge),
        })
    }
}
#[repr(C)]
#[derive(Copy, Clone)]
pub struct Client<F> {
    pub(super) get_handle_counters: extern "C" fn() -> &'static HandleCounters,
    pub(super) run: extern "C" fn(Bridge<'_>, F) -> Buffer<u8>,
    pub(super) f: F,
}
pub extern "C" fn __run_expand1(
    mut bridge: Bridge<'_>,
    f: fn(crate::TokenStream) -> crate::TokenStream,
) -> Buffer<u8> {
    
    let mut b = bridge.cached_buffer.take();
    panic::catch_unwind(panic::AssertUnwindSafe(|| {
        bridge.enter(|| {
            let reader = &mut &b[..];
            let input = TokenStream::decode(reader, &mut ());
            
            Bridge::with(|bridge| bridge.cached_buffer = b.take());
            let output = f(crate::TokenStream(input)).0;
            
            b = Bridge::with(|bridge| bridge.cached_buffer.take());
            
            
            
            
            
            
            
            
            
            b.clear();
            Ok::<_, ()>(output).encode(&mut b, &mut ());
        })
    }))
    .map_err(PanicMessage::from)
    .unwrap_or_else(|e| {
        b.clear();
        Err::<(), _>(e).encode(&mut b, &mut ());
    });
    b
}
impl Client<fn(crate::TokenStream) -> crate::TokenStream> {
    pub const fn expand1(f: fn(crate::TokenStream) -> crate::TokenStream) -> Self {
        Client {
            get_handle_counters: HandleCounters::get,
            run: __run_expand1,
            f,
        }
    }
}
pub extern "C" fn __run_expand2(
    mut bridge: Bridge<'_>,
    f: fn(crate::TokenStream, crate::TokenStream) -> crate::TokenStream,
) -> Buffer<u8> {
    
    let mut b = bridge.cached_buffer.take();
    panic::catch_unwind(panic::AssertUnwindSafe(|| {
        bridge.enter(|| {
            let reader = &mut &b[..];
            let input = TokenStream::decode(reader, &mut ());
            let input2 = TokenStream::decode(reader, &mut ());
            
            Bridge::with(|bridge| bridge.cached_buffer = b.take());
            let output = f(crate::TokenStream(input), crate::TokenStream(input2)).0;
            
            b = Bridge::with(|bridge| bridge.cached_buffer.take());
            
            
            
            
            
            
            
            
            
            b.clear();
            Ok::<_, ()>(output).encode(&mut b, &mut ());
        })
    }))
    .map_err(PanicMessage::from)
    .unwrap_or_else(|e| {
        b.clear();
        Err::<(), _>(e).encode(&mut b, &mut ());
    });
    b
}
impl Client<fn(crate::TokenStream, crate::TokenStream) -> crate::TokenStream> {
    pub const fn expand2(
        f: fn(crate::TokenStream, crate::TokenStream) -> crate::TokenStream
    ) -> Self {
        Client {
            get_handle_counters: HandleCounters::get,
            run: __run_expand2,
            f,
        }
    }
}
#[repr(C)]
#[derive(Copy, Clone)]
pub enum ProcMacro {
    CustomDerive {
        trait_name: &'static str,
        attributes: &'static [&'static str],
        client: Client<fn(crate::TokenStream) -> crate::TokenStream>,
    },
    Attr {
        name: &'static str,
        client: Client<fn(crate::TokenStream, crate::TokenStream) -> crate::TokenStream>,
    },
    Bang {
        name: &'static str,
        client: Client<fn(crate::TokenStream) -> crate::TokenStream>,
    },
}
impl ProcMacro {
    pub const fn custom_derive(
        trait_name: &'static str,
        attributes: &'static [&'static str],
        expand: fn(crate::TokenStream) -> crate::TokenStream,
    ) -> Self {
        ProcMacro::CustomDerive {
            trait_name,
            attributes,
            client: Client::expand1(expand),
        }
    }
    pub const fn attr(
        name: &'static str,
        expand: fn(crate::TokenStream, crate::TokenStream) -> crate::TokenStream,
    ) -> Self {
        ProcMacro::Attr {
            name,
            client: Client::expand2(expand),
        }
    }
    pub const fn bang(
        name: &'static str,
        expand: fn(crate::TokenStream) -> crate::TokenStream
    ) -> Self {
        ProcMacro::Bang {
            name,
            client: Client::expand1(expand),
        }
    }
}