use crate::pb::*;

use super::{GitksService, into_status, into_stream, resolve};

#[tonic::async_trait]
impl diff_service_server::DiffService for GitksService {
    type GetPatchStream =
        tokio_stream::wrappers::ReceiverStream<Result<GetPatchResponse, tonic::Status>>;

    async fn get_diff(
        &self,
        request: tonic::Request<GetDiffRequest>,
    ) -> Result<tonic::Response<GetDiffResponse>, tonic::Status> {
        let inner = request.into_inner();
        let gb = resolve(inner.repository.as_ref())?;
        let resp = gb.get_diff(inner).map_err(into_status)?;
        Ok(tonic::Response::new(resp))
    }

    async fn get_commit_diff(
        &self,
        request: tonic::Request<GetCommitDiffRequest>,
    ) -> Result<tonic::Response<GetDiffResponse>, tonic::Status> {
        let inner = request.into_inner();
        let gb = resolve(inner.repository.as_ref())?;
        let resp = gb.get_commit_diff(inner).map_err(into_status)?;
        Ok(tonic::Response::new(resp))
    }

    async fn get_patch(
        &self,
        request: tonic::Request<GetPatchRequest>,
    ) -> Result<tonic::Response<Self::GetPatchStream>, tonic::Status> {
        let inner = request.into_inner();
        let gb = resolve(inner.repository.as_ref())?;
        let items = gb.get_patch(inner).map_err(into_status)?;
        Ok(tonic::Response::new(into_stream(items)))
    }

    async fn get_diff_stats(
        &self,
        request: tonic::Request<GetDiffStatsRequest>,
    ) -> Result<tonic::Response<DiffStats>, tonic::Status> {
        let inner = request.into_inner();
        let gb = resolve(inner.repository.as_ref())?;
        let resp = gb.get_diff_stats(inner).map_err(into_status)?;
        Ok(tonic::Response::new(resp))
    }
}