use crate::pb::tag_service_client::TagServiceClient;
use crate::pb::*;

use super::{GitksService, into_status};

remote_client!(
    remote_tag_client,
    TagServiceClient<tonic::transport::Channel>,
    "tag"
);

#[tonic::async_trait]
impl tag_service_server::TagService for GitksService {
    async fn list_tags(
        &self,
        request: tonic::Request<ListTagsRequest>,
    ) -> Result<tonic::Response<ListTagsResponse>, tonic::Status> {
        let m = crate::metrics::RequestMetrics::new("gitks.TagService/ListTags");
        let inner = request.into_inner();
        let _rate = self.acquire_rate_limit(inner.repository.as_ref()).await?;
        let repo = self.repo_label(inner.repository.as_ref());
        let span = tracing::info_span!("tag.list_tags", %repo);
        let _enter = span.enter();
        let gb = match self.resolve(inner.repository.as_ref()) {
            Ok(gb) => gb,
            Err(err) if err.code() == tonic::Code::NotFound => {
                if let Some(mut client) =
                    remote_tag_client(self, inner.repository.as_ref(), false).await?
                {
                    m.record("ok");
                    return client.list_tags(inner).await;
                }
                crate::metrics::record_rpc_error(&m, &err);
                return Err(err);
            }
            Err(err) => {
                crate::metrics::record_rpc_error(&m, &err);
                return Err(err);
            }
        };
        let resp = gb.list_tags(inner).map_err(into_status)?;
        tracing::info!(%repo, count = resp.tags.len(), "list_tags done");
        m.record("ok");
        Ok(tonic::Response::new(resp))
    }

    async fn get_tag(
        &self,
        request: tonic::Request<GetTagRequest>,
    ) -> Result<tonic::Response<Tag>, tonic::Status> {
        let m = crate::metrics::RequestMetrics::new("gitks.TagService/GetTag");
        let inner = request.into_inner();
        let _rate = self.acquire_rate_limit(inner.repository.as_ref()).await?;
        let repo = self.repo_label(inner.repository.as_ref());
        let name = inner.name.clone();
        let span = tracing::info_span!("tag.get_tag", %repo, %name);
        let _enter = span.enter();
        let gb = match self.resolve(inner.repository.as_ref()) {
            Ok(gb) => gb,
            Err(err) if err.code() == tonic::Code::NotFound => {
                if let Some(mut client) =
                    remote_tag_client(self, inner.repository.as_ref(), false).await?
                {
                    m.record("ok");
                    return client.get_tag(inner).await;
                }
                crate::metrics::record_rpc_error(&m, &err);
                return Err(err);
            }
            Err(err) => {
                crate::metrics::record_rpc_error(&m, &err);
                return Err(err);
            }
        };
        let resp = gb.get_tag(inner).map_err(into_status)?;
        m.record("ok");
        Ok(tonic::Response::new(resp))
    }

    async fn create_tag(
        &self,
        request: tonic::Request<CreateTagRequest>,
    ) -> Result<tonic::Response<Tag>, tonic::Status> {
        let m = crate::metrics::RequestMetrics::new("gitks.TagService/CreateTag");
        let inner = request.into_inner();
        let _rate = self.acquire_rate_limit(inner.repository.as_ref()).await?;
        let repo = self.repo_label(inner.repository.as_ref());
        let name = inner.name.clone();
        let span = tracing::info_span!("tag.create_tag", %repo, %name);
        let _enter = span.enter();
        let gb = match self.resolve(inner.repository.as_ref()) {
            Ok(gb) => gb,
            Err(err) if err.code() == tonic::Code::NotFound => {
                if let Some(mut client) =
                    remote_tag_client(self, inner.repository.as_ref(), true).await?
                {
                    m.record("ok");
                    return client.create_tag(inner).await;
                }
                crate::metrics::record_rpc_error(&m, &err);
                return Err(err);
            }
            Err(err) => {
                crate::metrics::record_rpc_error(&m, &err);
                return Err(err);
            }
        };
        let resp = gb.create_tag(inner).map_err(into_status)?;
        tracing::info!(%repo, %name, "tag created");
        self.notify_ref_update(&repo, &format!("refs/tags/{}", name), "", "");
        m.record("ok");
        Ok(tonic::Response::new(resp))
    }

    async fn delete_tag(
        &self,
        request: tonic::Request<DeleteTagRequest>,
    ) -> Result<tonic::Response<()>, tonic::Status> {
        let m = crate::metrics::RequestMetrics::new("gitks.TagService/DeleteTag");
        let inner = request.into_inner();
        let _rate = self.acquire_rate_limit(inner.repository.as_ref()).await?;
        let repo = self.repo_label(inner.repository.as_ref());
        let name = inner.name.clone();
        let span = tracing::info_span!("tag.delete_tag", %repo, %name);
        let _enter = span.enter();
        let gb = match self.resolve(inner.repository.as_ref()) {
            Ok(gb) => gb,
            Err(err) if err.code() == tonic::Code::NotFound => {
                if let Some(mut client) =
                    remote_tag_client(self, inner.repository.as_ref(), true).await?
                {
                    m.record("ok");
                    return client.delete_tag(inner).await;
                }
                crate::metrics::record_rpc_error(&m, &err);
                return Err(err);
            }
            Err(err) => {
                crate::metrics::record_rpc_error(&m, &err);
                return Err(err);
            }
        };
        gb.delete_tag(inner).map_err(into_status)?;
        tracing::info!(%repo, %name, "tag deleted");
        self.notify_ref_update(&repo, &format!("refs/tags/{}", name), "", "");
        m.record("ok");
        Ok(tonic::Response::new(()))
    }

    async fn verify_tag(
        &self,
        request: tonic::Request<VerifyTagRequest>,
    ) -> Result<tonic::Response<VerifiedSignature>, tonic::Status> {
        let m = crate::metrics::RequestMetrics::new("gitks.TagService/VerifyTag");
        let inner = request.into_inner();
        let _rate = self.acquire_rate_limit(inner.repository.as_ref()).await?;
        let repo = self.repo_label(inner.repository.as_ref());
        let name = inner.name.clone();
        let span = tracing::info_span!("tag.verify_tag", %repo, %name);
        let _enter = span.enter();
        let gb = match self.resolve(inner.repository.as_ref()) {
            Ok(gb) => gb,
            Err(err) if err.code() == tonic::Code::NotFound => {
                if let Some(mut client) =
                    remote_tag_client(self, inner.repository.as_ref(), false).await?
                {
                    m.record("ok");
                    return client.verify_tag(inner).await;
                }
                crate::metrics::record_rpc_error(&m, &err);
                return Err(err);
            }
            Err(err) => {
                crate::metrics::record_rpc_error(&m, &err);
                return Err(err);
            }
        };
        let resp = gb.verify_tag(inner).map_err(into_status)?;
        tracing::info!(%repo, %name, verified = resp.verified, "tag verified");
        m.record("ok");
        Ok(tonic::Response::new(resp))
    }
}