using MeterVault.Core.Domain;
using MeterVault.Core.Normalization;
using MeterVault.Infrastructure.Import;
using static MeterVault.Integration.Tests.Reconciliation.ReconciliationSupport;

namespace MeterVault.Integration.Tests.Reconciliation;

/// <summary>
/// Reconciles the water meter against the Wasser sheet's Wasserverbrauch column, exercising the
/// mid-series register swap …861 → 2 (SDD §2.3). The importer detects the register drop and seeds
/// a swap event whose consumption override comes from the sheet's own column.
/// </summary>
public sealed class WaterReconciliationTests
{
    [Fact]
    public void Water_consumption_matches_the_sheet_across_the_swap()
    {
        var staged = Stage(ReferenceProfiles.Water(), Water);

        // A swap event must have been auto-detected at the 861→2 drop.
        Assert.Contains(staged.Events, e => e.EventType == MeterEventType.MeterSwap);

        var config = new MeterConfig
        {
            MeterId = ReferenceProfiles.Wasser,
            Mode = MeterMode.CumulativeCounter,
            Unit = "m3",
            InitialBaseline = 820, // pre-existing meter's register when tracking began (Nov 2022).
        };

        var computed = ByMonth(Normalize(staged, config));
        var oracle = OracleByMonth(ReadRows(Water), dateColumn: 0, valueColumn: 2, firstDataRow: 1);

        AssertReconciles(computed, oracle, tolerance: 1.0, "water", minMatches: 12);

        // Explicitly assert the swap month reconciles to 12.
        Assert.Equal(12d, computed[new DateOnly(2023, 3, 1)], 3);
    }
}