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// Copyright 2022 Protocol Labs.
// Copyright 2018 Parity Technologies (UK) Ltd.
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the "Software"),
// to deal in the Software without restriction, including without limitation
// the rights to use, copy, modify, merge, publish, distribute, sublicense,
// and/or sell copies of the Software, and to permit persons to whom the
// Software is furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
// DEALINGS IN THE SOFTWARE.

use crate::handler::{
    ConnectionEvent, ConnectionHandler, ConnectionHandlerEvent, FullyNegotiatedInbound,
    FullyNegotiatedOutbound, SubstreamProtocol,
};
use libp2p_core::upgrade::PendingUpgrade;
use std::task::{Context, Poll};
use void::Void;

/// Implementation of [`ConnectionHandler`] that returns a pending upgrade.
#[derive(Clone, Debug)]
pub struct PendingConnectionHandler {
    protocol_name: String,
}

impl PendingConnectionHandler {
    pub fn new(protocol_name: String) -> Self {
        PendingConnectionHandler { protocol_name }
    }
}

impl ConnectionHandler for PendingConnectionHandler {
    type FromBehaviour = Void;
    type ToBehaviour = Void;
    type InboundProtocol = PendingUpgrade<String>;
    type OutboundProtocol = PendingUpgrade<String>;
    type OutboundOpenInfo = Void;
    type InboundOpenInfo = ();

    fn listen_protocol(&self) -> SubstreamProtocol<Self::InboundProtocol, Self::InboundOpenInfo> {
        SubstreamProtocol::new(PendingUpgrade::new(self.protocol_name.clone()), ())
    }

    fn on_behaviour_event(&mut self, v: Self::FromBehaviour) {
        void::unreachable(v)
    }

    fn poll(
        &mut self,
        _: &mut Context<'_>,
    ) -> Poll<
        ConnectionHandlerEvent<Self::OutboundProtocol, Self::OutboundOpenInfo, Self::ToBehaviour>,
    > {
        Poll::Pending
    }

    fn on_connection_event(
        &mut self,
        event: ConnectionEvent<
            Self::InboundProtocol,
            Self::OutboundProtocol,
            Self::InboundOpenInfo,
            Self::OutboundOpenInfo,
        >,
    ) {
        match event {
            ConnectionEvent::FullyNegotiatedInbound(FullyNegotiatedInbound {
                protocol, ..
            }) => void::unreachable(protocol),
            ConnectionEvent::FullyNegotiatedOutbound(FullyNegotiatedOutbound {
                protocol,
                info: _info,
            }) => {
                void::unreachable(protocol);
                #[allow(unreachable_code, clippy::used_underscore_binding)]
                {
                    void::unreachable(_info);
                }
            }
            ConnectionEvent::AddressChange(_)
            | ConnectionEvent::DialUpgradeError(_)
            | ConnectionEvent::ListenUpgradeError(_)
            | ConnectionEvent::LocalProtocolsChange(_)
            | ConnectionEvent::RemoteProtocolsChange(_) => {}
        }
    }
}

	// Copyright 2022 Protocol Labs.
	// Copyright 2018 Parity Technologies (UK) Ltd.
	//
	// Permission is hereby granted, free of charge, to any person obtaining a
	// copy of this software and associated documentation files (the "Software"),
	// to deal in the Software without restriction, including without limitation
	// the rights to use, copy, modify, merge, publish, distribute, sublicense,
	// and/or sell copies of the Software, and to permit persons to whom the
	// Software is furnished to do so, subject to the following conditions:
	//
	// The above copyright notice and this permission notice shall be included in
	// all copies or substantial portions of the Software.
	//
	// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
	// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
	// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
	// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
	// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
	// DEALINGS IN THE SOFTWARE.

	use crate::handler::{
	ConnectionEvent, ConnectionHandler, ConnectionHandlerEvent, FullyNegotiatedInbound,
	FullyNegotiatedOutbound, SubstreamProtocol,
	};
	use libp2p_core::upgrade::PendingUpgrade;
	use std::task::{Context, Poll};
	use void::Void;

	/// Implementation of [`ConnectionHandler`] that returns a pending upgrade.
	#[derive(Clone, Debug)]
	pub struct PendingConnectionHandler {
	protocol_name: String,
	}

	impl PendingConnectionHandler {
	pub fn new(protocol_name: String) -> Self {
	PendingConnectionHandler { protocol_name }
	}
	}

	impl ConnectionHandler for PendingConnectionHandler {
	type FromBehaviour = Void;
	type ToBehaviour = Void;
	type InboundProtocol = PendingUpgrade<String>;
	type OutboundProtocol = PendingUpgrade<String>;
	type OutboundOpenInfo = Void;
	type InboundOpenInfo = ();

	fn listen_protocol(&self) -> SubstreamProtocol<Self::InboundProtocol, Self::InboundOpenInfo> {
	SubstreamProtocol::new(PendingUpgrade::new(self.protocol_name.clone()), ())
	}

	fn on_behaviour_event(&mut self, v: Self::FromBehaviour) {
	void::unreachable(v)
	}

	fn poll(
	&mut self,
	_: &mut Context<'_>,
	) -> Poll<
	ConnectionHandlerEvent<Self::OutboundProtocol, Self::OutboundOpenInfo, Self::ToBehaviour>,
	> {
	Poll::Pending
	}

	fn on_connection_event(
	&mut self,
	event: ConnectionEvent<
	Self::InboundProtocol,
	Self::OutboundProtocol,
	Self::InboundOpenInfo,
	Self::OutboundOpenInfo,
	>,
	) {
	match event {
	ConnectionEvent::FullyNegotiatedInbound(FullyNegotiatedInbound {
	protocol, ..
	}) => void::unreachable(protocol),
	ConnectionEvent::FullyNegotiatedOutbound(FullyNegotiatedOutbound {
	protocol,
	info: _info,
	}) => {
	void::unreachable(protocol);
	#[allow(unreachable_code, clippy::used_underscore_binding)]
	{
	void::unreachable(_info);
	}
	}
	ConnectionEvent::AddressChange(_)
	\| ConnectionEvent::DialUpgradeError(_)
	\| ConnectionEvent::ListenUpgradeError(_)
	\| ConnectionEvent::LocalProtocolsChange(_)
	\| ConnectionEvent::RemoteProtocolsChange(_) => {}
	}
	}
	}