using System.Net;
using Xunit;

namespace HikvisionAttendanceService.Tests;

public class UserSyncRetryHelperTests
{
    [Theory]
    [InlineData(0, 1000)]
    [InlineData(1, 2000)]
    [InlineData(2, 4000)]
    public void GetBackoffDelayMilliseconds_exponential(int attempt, int expectedMs)
    {
        Assert.Equal(expectedMs, UserSyncRetryHelper.GetBackoffDelayMilliseconds(attempt));
    }

    [Fact]
    public void GetBackoffDelayMilliseconds_caps_at_30s()
    {
        Assert.Equal(30_000, UserSyncRetryHelper.GetBackoffDelayMilliseconds(20));
    }

    [Theory]
    [InlineData(503, true)]
    [InlineData(502, true)]
    [InlineData(429, true)]
    [InlineData(408, true)]
    [InlineData(401, false)]
    [InlineData(404, false)]
    [InlineData(200, false)]
    public void IsTransientHttpStatus(int code, bool transient)
    {
        Assert.Equal(transient, UserSyncRetryHelper.IsTransientHttpStatus((HttpStatusCode)code));
    }
}

public class HistoricalAcsDynamicBatchTests
{
    [Theory]
    [InlineData(0, 30)]
    [InlineData(999, 30)]
    [InlineData(1000, 50)]
    [InlineData(4999, 50)]
    [InlineData(5000, 100)]
    public void DetermineDynamicAcsBatchSize_thresholds(int parsedOk, int expected)
    {
        // internal method accessed via reflection because it lives inside HikvisionAttendanceManager.cs
        var t = typeof(HikvisionAttendanceService.HikvisionAttendanceManager);
        var m = t.GetMethod("DetermineDynamicAcsBatchSize", System.Reflection.BindingFlags.NonPublic | System.Reflection.BindingFlags.Static);
        Assert.NotNull(m);
        var v = (int)m!.Invoke(null, new object[] { parsedOk, 30 })!;
        Assert.Equal(expected, v);
    }
}