// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.

using System;
using System.Collections.Generic;
using Microsoft.CodeAnalysis.Host;

namespace Microsoft.CodeAnalysis.Diagnostics;

internal interface IPerformanceTrackerService : IWorkspaceService
{
    void AddSnapshot(IEnumerable<AnalyzerPerformanceInfo> snapshot, int unitCount, bool forSpanAnalysis);
    void GenerateReport(List<AnalyzerInfoForPerformanceReporting> analyzerInfos, bool forSpanAnalysis);

    event EventHandler SnapshotAdded;
}

internal readonly struct AnalyzerInfoForPerformanceReporting
{
    public readonly bool BuiltIn;
    public readonly string AnalyzerId;
    public readonly string AnalyzerIdHash;
    public readonly double Average;
    public readonly double AdjustedStandardDeviation;

    public AnalyzerInfoForPerformanceReporting(bool builtIn, string analyzerId, double average, double stddev) : this()
    {
        BuiltIn = builtIn;
        AnalyzerId = analyzerId;
        AnalyzerIdHash = analyzerId.GetHashCode().ToString();
        Average = average;
        AdjustedStandardDeviation = stddev;
    }

    public string PIISafeAnalyzerId => BuiltIn ? AnalyzerId : AnalyzerIdHash;
}