// Licensed to Apache Software Foundation (ASF) under one or more contributor
// license agreements. See the NOTICE file distributed with
// this work for additional information regarding copyright
// ownership. Apache Software Foundation (ASF) licenses this file to you 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.

package sub

import (
	"context"

	databasev1 "github.com/apache/skywalking-banyandb/api/proto/banyandb/database/v1"
)

func (s *server) GetCurrentNode(context.Context, *databasev1.GetCurrentNodeRequest) (*databasev1.GetCurrentNodeResponse, error) {
	return &databasev1.GetCurrentNodeResponse{
		Node: s.curNode,
	}, nil
}

func (s *server) GetClusterState(context.Context, *databasev1.GetClusterStateRequest) (*databasev1.GetClusterStateResponse, error) {
	s.routeTableProviderMu.RLock()
	defer s.routeTableProviderMu.RUnlock()

	if s.routeTableProvider == nil {
		return &databasev1.GetClusterStateResponse{RouteTables: map[string]*databasev1.RouteTable{}}, nil
	}

	routeTables := make(map[string]*databasev1.RouteTable, len(s.routeTableProvider))
	for routeKey, provider := range s.routeTableProvider {
		if provider == nil {
			s.log.Warn().Str("routeKey", routeKey).Msg("route table provider is nil")
			continue
		}

		routeTable := provider.GetRouteTable()
		if routeTable != nil {
			routeTables[routeKey] = routeTable
		}
	}

	return &databasev1.GetClusterStateResponse{RouteTables: routeTables}, nil
}
