//
// Copyright 2024 Google LLC
//
// 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.
//

using System.Collections.Generic;

namespace Google.Solutions.Common
{
    /// <summary>
    /// Log for telemetry events. The default implementation drops
    /// all events.
    /// </summary>
    public class TelemetryLog
    {
        /// <summary>
        /// Current telemetry log. The default log drops all events.
        /// </summary>
        public static TelemetryLog Current { get; set; } = new TelemetryLog();

        protected TelemetryLog()
        {
        }

        /// <summary>
        /// Enable or disable telemetry collection.
        /// </summary>
        public virtual bool Enabled { get; set; }

        /// <summary>
        /// Write a telemetry event.
        /// </summary>
        /// <param name="eventName">Unique event name</param>
        /// <param name="parameters">Event-specific parameters</param>
        public virtual void Write(
            string eventName,
            IEnumerable<KeyValuePair<string, object>> parameters)
        { }
    }
}