#region Copyright notice and license

// Copyright 2015, Google Inc.
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
//     * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
//     * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
//     * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

#endregion

using System;
using System.IO;
using System.Threading;
using Grpc.Core.Internal;

namespace Grpc.Core.Profiling
{
    internal struct ProfilerEntry
    {
        public enum Type
        {
            BEGIN,
            END,
            MARK
        }

        public ProfilerEntry(Timespec timespec, Type type, string tag)
        {
            this.timespec = timespec;
            this.type = type;
            this.tag = tag;
        }

        public Timespec timespec;
        public Type type;
        public string tag;

        public override string ToString()
        {
            // mimic the output format used by C core.
            return string.Format(
                "{{\"t\": {0}.{1}, \"thd\":\"unknown\", \"type\": \"{2}\", \"tag\": \"{3}\", " +
                "\"file\": \"unknown\", \"line\": 0, \"imp\": 0}}",
                timespec.TimevalSeconds, timespec.TimevalNanos.ToString("D9"),
                GetTypeAbbreviation(type), tag);
        }

        internal static string GetTypeAbbreviation(Type type)
        {
            switch (type)
            {
                case Type.BEGIN:
                    return "{";

                case Type.END:
                    return "}";
                
                case Type.MARK:
                    return ".";
                default:
                    throw new ArgumentException("Unknown type");
            }
        }
    }
}
