using Shouldly;
using Xunit;
using ZB.MOM.WW.OtOpcUa.Core.Abstractions;

namespace ZB.MOM.WW.OtOpcUa.Driver.Historian.SqlServer.Tests;

public sealed class ValueWriterPrepareTests
{
    private static readonly DateTime T = new(2026, 10, 9, 1, 2, 3, DateTimeKind.Utc);

    [Fact]
    public void Non_finite_doubles_become_Empty_keeping_status()
    {
        const uint status = 0x40000000u;
        var rows = SqlServerHistorianValueWriter.Prepare(
        [
            new(T, HistorianValue.FromDouble(double.NaN), status),
            new(T.AddTicks(1), HistorianValue.FromDouble(double.PositiveInfinity), 0),
            new(T.AddTicks(2), HistorianValue.FromDouble(double.NegativeInfinity), 0),
            new(T.AddTicks(3), HistorianValue.FromDouble(1.5), 0),
        ], () => T);
        rows.Select(r => r.Value.Kind).ShouldBe([HistorianValueKind.Empty, HistorianValueKind.Empty, HistorianValueKind.Empty, HistorianValueKind.Double]);
        rows[0].StatusCode.ShouldBe(status);
    }

    [Fact]
    public void Duplicate_timestamps_keep_the_first_and_null_timestamp_uses_the_clock()
    {
        var rows = SqlServerHistorianValueWriter.Prepare(
        [
            new(T, HistorianValue.FromInt64(1), 0), new(T, HistorianValue.FromInt64(2), 0),
            new(null, HistorianValue.FromInt64(3), 0),
        ], () => T.AddDays(1));
        rows.Count.ShouldBe(2);
        rows[0].Value.Integer.ShouldBe(1);
        rows[1].TimeUtc.ShouldBe(T.AddDays(1));
    }

    [Fact]
    public void Data_type_mapping_is_one_table()
    {
        SqlHistorianDataTypes.FromKind(HistorianValueKind.Double).ShouldBe((byte)DriverDataType.Float64);
        SqlHistorianDataTypes.FromKind(HistorianValueKind.Boolean).ShouldBe((byte)DriverDataType.Boolean);
        SqlHistorianDataTypes.FromKind(HistorianValueKind.Empty).ShouldBe((byte)DriverDataType.Float64);
    }
}