// 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.

#pragma once

#include "utils/Status.h"
#include "config/ConfigNode.h"

#include "yaml-cpp/yaml.h"

namespace zilliz {
namespace milvus {
namespace server {

static const char* CONFIG_SERVER = "server_config";
static const char* CONFIG_SERVER_ADDRESS = "address";
static const char* CONFIG_SERVER_PORT = "port";
static const char* CONFIG_CLUSTER_MODE = "mode";
static const char* CONFIG_TIME_ZONE = "time_zone";

static const char* CONFIG_DB = "db_config";
static const char* CONFIG_DB_URL = "db_backend_url";
static const char* CONFIG_DB_PATH = "db_path";
static const char* CONFIG_DB_SLAVE_PATH = "db_slave_path";
static const char* CONFIG_DB_ARCHIVE_DISK = "archive_disk_threshold";
static const char* CONFIG_DB_ARCHIVE_DAYS = "archive_days_threshold";
static const char* CONFIG_DB_INSERT_BUFFER_SIZE = "insert_buffer_size";
static const char* CONFIG_DB_PARALLEL_REDUCE = "parallel_reduce";
static const char* CONFIG_DB_BUILD_INDEX_GPU = "build_index_gpu";

static const char* CONFIG_LOG = "log_config";

static const char* CONFIG_CACHE = "cache_config";
static const char* CONFIG_CPU_CACHE_CAPACITY = "cpu_cache_capacity";
static const char* CONFIG_GPU_CACHE_CAPACITY = "gpu_cache_capacity";
static const char* CACHE_FREE_PERCENT = "cpu_cache_free_percent";
static const char* CONFIG_INSERT_CACHE_IMMEDIATELY = "insert_cache_immediately";
static const char *GPU_CACHE_FREE_PERCENT = "gpu_cache_free_percent";

static const char* CONFIG_METRIC = "metric_config";
static const char* CONFIG_METRIC_IS_STARTUP = "is_startup";
static const char* CONFIG_METRIC_COLLECTOR = "collector";
static const char* CONFIG_PROMETHEUS = "prometheus_config";
static const char* CONFIG_METRIC_PROMETHEUS_PORT = "port";

static const char* CONFIG_ENGINE = "engine_config";
static const char* CONFIG_DCBT = "use_blas_threshold";
static const char* CONFIG_OMP_THREAD_NUM = "omp_thread_num";

static const char* CONFIG_RESOURCE = "resource_config";
static const char* CONFIG_RESOURCES = "resources";
static const char* CONFIG_RESOURCE_TYPE = "type";
static const char* CONFIG_RESOURCE_DEVICE_ID = "device_id";
static const char* CONFIG_RESOURCE_ENABLE_EXECUTOR = "enable_executor";
static const char* CONFIG_RESOURCE_NUM = "gpu_resource_num";
static const char* CONFIG_RESOURCE_PIN_MEMORY = "pinned_memory";
static const char* CONFIG_RESOURCE_TEMP_MEMORY = "temp_memory";
static const char* CONFIG_RESOURCE_CONNECTIONS = "connections";
static const char* CONFIG_SPEED_CONNECTIONS = "speed";
static const char* CONFIG_ENDPOINT_CONNECTIONS = "endpoint";


class ServerConfig {
 public:
    static ServerConfig &GetInstance();

    Status LoadConfigFile(const std::string& config_filename);
    Status ValidateConfig();
    void PrintAll() const;

    ConfigNode GetConfig(const std::string& name) const;
    ConfigNode& GetConfig(const std::string& name);

 private:
    Status CheckServerConfig();
    Status CheckDBConfig();
    Status CheckMetricConfig();
    Status CheckCacheConfig();
    Status CheckEngineConfig();
    Status CheckResourceConfig();
};

}
}
}