// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
 
using System.Threading;
using Microsoft.Extensions.Compliance.Classification;
using Microsoft.Extensions.Compliance.Redaction;
 
namespace Microsoft.Extensions.Compliance.Testing;
 
/// <summary>
/// A provider of fake redactors.
/// </summary>
public class FakeRedactorProvider : IRedactorProvider
{
    private readonly FakeRedactor _redactor;
    private int _redactorsRequestedSoFar;
 
    /// <summary>
    /// Gets the collector that stores data about usage of fake redaction classes.
    /// </summary>
    public FakeRedactionCollector Collector { get; }
 
    /// <summary>
    /// Initializes a new instance of the <see cref="FakeRedactorProvider"/> class.
    /// </summary>
    /// <param name="options">Fake redactor options.</param>
    /// <param name="eventCollector">Collects information about redactor requests.</param>
    public FakeRedactorProvider(FakeRedactorOptions? options = null, FakeRedactionCollector? eventCollector = null)
    {
        Collector = eventCollector ?? new FakeRedactionCollector();
        _redactor = new FakeRedactor(Options.Options.Create(options ?? new FakeRedactorOptions()), Collector);
    }
 
    /// <inheritdoc/>
    public Redactor GetRedactor(DataClassificationSet classifications)
    {
        var order = Interlocked.Increment(ref _redactorsRequestedSoFar);
 
        Collector.Append(new RedactorRequested(classifications, order));
 
        return _redactor;
    }
}