using MeterVault.Core.Analysis.Virtual;
using MeterVault.Core.Domain;
using MeterVault.Infrastructure.Analysis;

namespace MeterVault.Integration.Tests.Analysis;

/// <summary>
/// The analysis catalog built from loaded rows, without a database: one meter's broken configuration stays that meter's
/// finding and never fails the catalog every analysis, cost, flow and solar read is built on.
/// </summary>
public sealed class AnalysisCatalogTests
{
    [Fact]
    public void A_legacy_sum_of_hundreds_of_links_needs_configuration_and_the_other_meters_still_read()
    {
        // Review virtual F3: an expression-less virtual meter fed by 300 links implies a formula longer than 2,000
        // characters. Deriving it used to throw out of Build, which every read calls.
        var meters = Enumerable.Range(1000, 300)
            .Select(id => new Meter { Id = id, Name = $"PV {id}", EnergyTypeId = 1, Mode = MeterMode.GenerationCounter, Unit = "kWh", Meta = "{}" })
            .Append(new Meter { Id = 5000, Name = "Sum", EnergyTypeId = 1, Mode = MeterMode.Virtual, Unit = "kWh", Meta = "{}" })
            .Append(new Meter { Id = 6000, Name = "Unrelated", EnergyTypeId = 2, Mode = MeterMode.CumulativeCounter, Unit = "kWh", Meta = "{}" })
            .ToList();
        var links = Enumerable.Range(1000, 300).Select(id => new MeterLink { FromMeterId = id, ToMeterId = 5000 }).ToList();

        var catalog = AnalysisCatalog.Build(meters, [], links, [], TimeZoneInfo.Utc);

        Assert.Equal(VirtualMeterStatus.NeedsConfiguration, catalog.Find(5000)!.VirtualStatus);
        Assert.Equal(LegacyDerivationOutcome.Invalid, catalog.Find(5000)!.Legacy!.Outcome);
        Assert.NotNull(catalog.Find(6000));
        Assert.NotNull(catalog.Find(1000));
    }
}