// -------------------------------------------------------------------------------------------------
// Copyright (c) Microsoft Corporation. All rights reserved.
// Licensed under the MIT License (MIT). See LICENSE in the repo root for license information.
// -------------------------------------------------------------------------------------------------

using System;
using System.Diagnostics;
using EnsureThat;
using Microsoft.Extensions.Logging;

namespace Microsoft.Health.Core;

public sealed class ActionTimer : IDisposable
{
    private readonly ILogger _logger;
    private readonly string _componentName;
    private readonly Stopwatch _stopwatch;
    private readonly IDisposable _scope;

    public ActionTimer(ILogger logger, string componentName)
    {
        EnsureArg.IsNotNull(logger, nameof(logger));
        EnsureArg.IsNotNull(componentName, nameof(componentName));

        _logger = logger;
        _componentName = componentName;
        _stopwatch = new Stopwatch();

        _scope = _logger.BeginScope($"Beginning execution of {componentName}");
        _stopwatch.Start();
    }

    public TimeSpan ElapsedTime => _stopwatch.Elapsed;

    public void Dispose()
    {
        _stopwatch.Stop();
        _logger.LogInformation("{Component} executed in {Duration}.", _componentName, _stopwatch.Elapsed);
        _scope.Dispose();
    }
}