// SPDX-FileCopyrightText: Copyright (c) 2024-2025 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
// SPDX-License-Identifier: Apache-2.0
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

use super::*;
use crate::Error;

impl<Req: PipelineIO, Resp: PipelineIO> ServiceBackend<Req, Resp> {
    pub fn from_engine(engine: ServiceEngine<Req, Resp>) -> Arc<Self> {
        Arc::new(Self {
            engine,
            inner: SinkEdge::default(),
        })
    }
}

#[async_trait]
impl<Req: PipelineIO, Resp: PipelineIO> Sink<Req> for ServiceBackend<Req, Resp> {
    async fn on_data(&self, data: Req, _: Token) -> Result<(), Error> {
        let stream = self.engine.generate(data).await?;
        self.on_next(stream, Token).await
    }
}

#[async_trait]
impl<Req: PipelineIO, Resp: PipelineIO> Source<Resp> for ServiceBackend<Req, Resp> {
    async fn on_next(&self, data: Resp, _: Token) -> Result<(), Error> {
        self.inner.on_next(data, Token).await
    }

    fn set_edge(&self, edge: Edge<Resp>, _: Token) -> Result<(), PipelineError> {
        self.inner.set_edge(edge, Token)
    }
}
