using System;
using System.Diagnostics;
using System.Diagnostics.Metrics;

namespace StellaOps.Provcache;

public static partial class ProvcacheTelemetry
{
    /// <summary>
    /// Record operation latency.
    /// </summary>
    /// <param name="operation">The operation type.</param>
    /// <param name="duration">The operation duration.</param>
    public static void RecordLatency(string operation, TimeSpan duration)
    {
        if (string.IsNullOrWhiteSpace(operation))
            return;

        var seconds = duration.TotalSeconds;
        if (double.IsNaN(seconds) || double.IsInfinity(seconds) || seconds < 0)
            seconds = 0d;

        var tags = new TagList
        {
            { "operation", operation }
        };

        _latencyHistogram.Record(seconds, tags);
    }

    /// <summary>
    /// Record cache entry size.
    /// </summary>
    /// <param name="bytes">The size in bytes.</param>
    public static void RecordEntrySize(long bytes)
    {
        if (bytes < 0)
            return;

        _entrySizeHistogram.Record(bytes);
    }
}