use std::error::Error;
use std::fs;

static OUT_DIR: &str = "src/proto-gen";

fn main() -> Result<(), Box<dyn Error>> {
    let protos = [
        "proto/basic/basic.proto",
        "proto/hello.proto",
        "proto/goodbye.proto",
    ];

    fs::create_dir_all(OUT_DIR).unwrap();
    tonic_build::configure()
        .build_server(true)
        .out_dir(OUT_DIR)
        .compile(&protos, &["proto/"])?;

    rerun(&protos);

    Ok(())
}

fn rerun(proto_files: &[&str]) {
    for proto_file in proto_files {
        println!("cargo:rerun-if-changed={}", proto_file);
    }
}

#[derive(Clone, PartialEq, ::prost::Message)]
pub struct BaseResponse {
    #[prost(string, tag = "1")]
    pub message: ::prost::alloc::string::String,
    #[prost(int32, tag = "2")]
    pub code: i32,
}

#[derive(Clone, PartialEq, ::prost::Message)]
pub struct HelloRequest {
    #[prost(string, tag = "1")]
    pub name: ::prost::alloc::string::String,
}
#[derive(Clone, PartialEq, ::prost::Message)]
pub struct HelloResponse {
    #[prost(string, tag = "1")]
    pub data: ::prost::alloc::string::String,
    #[prost(message, optional, tag = "2")]
    pub message: ::core::option::Option<super::basic::BaseResponse>,
}
/// Generated client implementations.
pub mod hello_client {
    #![allow(unused_variables, dead_code, missing_docs, clippy::let_unit_value)]
    use tonic::codegen::*;
    use tonic::codegen::http::Uri;
    #[derive(Debug, Clone)]
    pub struct HelloClient<T> {
        inner: tonic::client::Grpc<T>,
    }
    impl HelloClient<tonic::transport::Channel> {
        /// Attempt to create a new client by connecting to a given endpoint.
        pub async fn connect<D>(dst: D) -> Result<Self, tonic::transport::Error>
        where
            D: std::convert::TryInto<tonic::transport::Endpoint>,
            D::Error: Into<StdError>,
        {
            let conn = tonic::transport::Endpoint::new(dst)?.connect().await?;
            Ok(Self::new(conn))
        }
    }
    impl<T> HelloClient<T>
    where
        T: tonic::client::GrpcService<tonic::body::BoxBody>,
        T::Error: Into<StdError>,
        T::ResponseBody: Body<Data = Bytes> + Send + 'static,
        <T::ResponseBody as Body>::Error: Into<StdError> + Send,
    {
        pub fn new(inner: T) -> Self {
            let inner = tonic::client::Grpc::new(inner);
            Self { inner }
        }
        pub fn with_origin(inner: T, origin: Uri) -> Self {
            let inner = tonic::client::Grpc::with_origin(inner, origin);
            Self { inner }
        }
        pub fn with_interceptor<F>(
            inner: T,
            interceptor: F,
        ) -> HelloClient<InterceptedService<T, F>>
        where
            F: tonic::service::Interceptor,
            T::ResponseBody: Default,
            T: tonic::codegen::Service<
                http::Request<tonic::body::BoxBody>,
                Response = http::Response<
                    <T as tonic::client::GrpcService<tonic::body::BoxBody>>::ResponseBody,
                >,
            >,
            <T as tonic::codegen::Service<
                http::Request<tonic::body::BoxBody>,
            >>::Error: Into<StdError> + Send + Sync,
        {
            HelloClient::new(InterceptedService::new(inner, interceptor))
        }
        /// Compress requests with the given encoding.
        ///
        /// This requires the server to support it otherwise it might respond with an
        /// error.
        #[must_use]
        pub fn send_compressed(mut self, encoding: CompressionEncoding) -> Self {
            self.inner = self.inner.send_compressed(encoding);
            self
        }
        /// Enable decompressing responses.
        #[must_use]
        pub fn accept_compressed(mut self, encoding: CompressionEncoding) -> Self {
            self.inner = self.inner.accept_compressed(encoding);
            self
        }
        pub async fn hello(
            &mut self,
            request: impl tonic::IntoRequest<super::HelloRequest>,
        ) -> Result<tonic::Response<super::HelloResponse>, tonic::Status> {
            self.inner
                .ready()
                .await
                .map_err(|e| {
                    tonic::Status::new(
                        tonic::Code::Unknown,
                        format!("Service was not ready: {}", e.into()),
                    )
                })?;
            let codec = tonic::codec::ProstCodec::default();
            let path = http::uri::PathAndQuery::from_static("/hello.Hello/Hello");
            self.inner.unary(request.into_request(), path, codec).await
        }
    }
}
/// Generated server implementations.
pub mod hello_server {
    #![allow(unused_variables, dead_code, missing_docs, clippy::let_unit_value)]
    use tonic::codegen::*;
    /// Generated trait containing gRPC methods that should be implemented for use with HelloServer.
    #[async_trait]
    pub trait Hello: Send + Sync + 'static {
        async fn hello(
            &self,
            request: tonic::Request<super::HelloRequest>,
        ) -> Result<tonic::Response<super::HelloResponse>, tonic::Status>;
    }
    #[derive(Debug)]
    pub struct HelloServer<T: Hello> {
        inner: _Inner<T>,
        accept_compression_encodings: EnabledCompressionEncodings,
        send_compression_encodings: EnabledCompressionEncodings,
    }
    struct _Inner<T>(Arc<T>);
    impl<T: Hello> HelloServer<T> {
        pub fn new(inner: T) -> Self {
            Self::from_arc(Arc::new(inner))
        }
        pub fn from_arc(inner: Arc<T>) -> Self {
            let inner = _Inner(inner);
            Self {
                inner,
                accept_compression_encodings: Default::default(),
                send_compression_encodings: Default::default(),
            }
        }
        pub fn with_interceptor<F>(
            inner: T,
            interceptor: F,
        ) -> InterceptedService<Self, F>
        where
            F: tonic::service::Interceptor,
        {
            InterceptedService::new(Self::new(inner), interceptor)
        }
        /// Enable decompressing requests with the given encoding.
        #[must_use]
        pub fn accept_compressed(mut self, encoding: CompressionEncoding) -> Self {
            self.accept_compression_encodings.enable(encoding);
            self
        }
        /// Compress responses with the given encoding, if the client supports it.
        #[must_use]
        pub fn send_compressed(mut self, encoding: CompressionEncoding) -> Self {
            self.send_compression_encodings.enable(encoding);
            self
        }
    }
    impl<T, B> tonic::codegen::Service<http::Request<B>> for HelloServer<T>
    where
        T: Hello,
        B: Body + Send + 'static,
        B::Error: Into<StdError> + Send + 'static,
    {
        type Response = http::Response<tonic::body::BoxBody>;
        type Error = std::convert::Infallible;
        type Future = BoxFuture<Self::Response, Self::Error>;
        fn poll_ready(
            &mut self,
            _cx: &mut Context<'_>,
        ) -> Poll<Result<(), Self::Error>> {
            Poll::Ready(Ok(()))
        }
        fn call(&mut self, req: http::Request<B>) -> Self::Future {
            let inner = self.inner.clone();
            match req.uri().path() {
                "/hello.Hello/Hello" => {
                    #[allow(non_camel_case_types)]
                    struct HelloSvc<T: Hello>(pub Arc<T>);
                    impl<T: Hello> tonic::server::UnaryService<super::HelloRequest>
                    for HelloSvc<T> {
                        type Response = super::HelloResponse;
                        type Future = BoxFuture<
                            tonic::Response<Self::Response>,
                            tonic::Status,
                        >;
                        fn call(
                            &mut self,
                            request: tonic::Request<super::HelloRequest>,
                        ) -> Self::Future {
                            let inner = self.0.clone();
                            let fut = async move { (*inner).hello(request).await };
                            Box::pin(fut)
                        }
                    }
                    let accept_compression_encodings = self.accept_compression_encodings;
                    let send_compression_encodings = self.send_compression_encodings;
                    let inner = self.inner.clone();
                    let fut = async move {
                        let inner = inner.0;
                        let method = HelloSvc(inner);
                        let codec = tonic::codec::ProstCodec::default();
                        let mut grpc = tonic::server::Grpc::new(codec)
                            .apply_compression_config(
                                accept_compression_encodings,
                                send_compression_encodings,
                            );
                        let res = grpc.unary(method, req).await;
                        Ok(res)
                    };
                    Box::pin(fut)
                }
                _ => {
                    Box::pin(async move {
                        Ok(
                            http::Response::builder()
                                .status(200)
                                .header("grpc-status", "12")
                                .header("content-type", "application/grpc")
                                .body(empty_body())
                                .unwrap(),
                        )
                    })
                }
            }
        }
    }
    impl<T: Hello> Clone for HelloServer<T> {
        fn clone(&self) -> Self {
            let inner = self.inner.clone();
            Self {
                inner,
                accept_compression_encodings: self.accept_compression_encodings,
                send_compression_encodings: self.send_compression_encodings,
            }
        }
    }
    impl<T: Hello> Clone for _Inner<T> {
        fn clone(&self) -> Self {
            Self(self.0.clone())
        }
    }
    impl<T: std::fmt::Debug> std::fmt::Debug for _Inner<T> {
        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
            write!(f, "{:?}", self.0)
        }
    }
    impl<T: Hello> tonic::server::NamedService for HelloServer<T> {
        const NAME: &'static str = "hello.Hello";
    }
}

pub mod basic {
    include!("./proto-gen/basic.rs");
}

pub mod hello {
    include!("./proto-gen/hello.rs");
}

pub mod goodbye {
    include!("./proto-gen/goodbye.rs");
}

#[derive(Default)]
pub struct HelloService {}

#[tonic::async_trait]
impl Hello for HelloService {
    async fn hello(&self, req: Request<HelloRequest>) -> Result<Response<HelloResponse>, Status> {
        println!("hello receive request: {:?}", req);

        let response = HelloResponse {
            data: format!("Hello, {}", req.into_inner().name),
            message: Some(BaseResponse {
                message: "Ok".to_string(),
                code: 200,
            }),
        };
        Ok(Response::new(response))
    }
}

#[derive(Default)]
pub struct GoodbyeService {}

#[tonic::async_trait]
impl Goodbye for GoodbyeService {
    async fn goodbye(
        &self,
        req: Request<GoodbyeRequest>,
    ) -> Result<Response<GoodbyeResponse>, Status> {
        println!("goodbye receive request: {:?}", req);

        let response = GoodbyeResponse {
            data: format!("Goodbye, {}", req.into_inner().name),
            message: Some(BaseResponse {
                message: "Ok".to_string(),
                code: 200,
            }),
        };
        Ok(Response::new(response))
    }
}

#[tokio::main]
async fn main() -> Result<(), Box<dyn std::error::Error>> {
    let addr = "0.0.0.0:50051".parse()?;

    println!("server starting at: {}", addr);

    Server::builder()
        .add_service(HelloServer::new(HelloService::default()))
        .add_service(GoodbyeServer::new(GoodbyeService::default()))
        .serve(addr)
        .await?;

    Ok(())
}

#[tokio::main]
async fn main() -> Result<(), Box<dyn std::error::Error>> {
    let addr = Endpoint::from_static("https://127.0.0.1:50051");

    let mut hello_cli = HelloClient::connect(addr.clone()).await?;
    let request = Request::new(HelloRequest {
        name: "tonic".to_string(),
    });
    let response = hello_cli.hello(request).await?;
    println!("hello response: {:?}", response.into_inner());

    let mut goodbye_cli = GoodbyeClient::connect(addr).await?;
    let request = Request::new(GoodbyeRequest {
        name: "tonic".to_string(),
    });
    let response = goodbye_cli.goodbye(request).await?;
    println!("goodbye response: {:?}", response.into_inner());

    Ok(())
}