// Licensed to the 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.  The 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.

#include "metrics/Metrics.h"
#include "server/Config.h"
#ifdef MILVUS_WITH_PROMETHEUS
#include "metrics/prometheus/PrometheusMetrics.h"
#endif

#include <string>

namespace milvus {
namespace server {

MetricsBase&
Metrics::GetInstance() {
    static MetricsBase& instance = CreateMetricsCollector();
    return instance;
}

MetricsBase&
Metrics::CreateMetricsCollector() {
    Config& config = Config::GetInstance();
    std::string collector_type_str;

    config.GetMetricConfigCollector(collector_type_str);

#ifdef MILVUS_WITH_PROMETHEUS
    if (collector_type_str == "prometheus") {
        return PrometheusMetrics::GetInstance();
    } else {
        return MetricsBase::GetInstance();
    }
#else
    return MetricsBase::GetInstance();
#endif
}

}  // namespace server
}  // namespace milvus