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

namespace ZB.MOM.WW.OtOpcUa.Driver.Historian.Sql.Common.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_and_are_forced_Bad()
    {
        const uint uncertain = 0x40000000u;
        const uint badNoCommunication = 0x80310000u;
        var rows = LiveWritePreparer.Prepare(
        [
            new(T, HistorianValue.FromDouble(double.NaN), uncertain),
            new(T.AddTicks(1), HistorianValue.FromDouble(double.PositiveInfinity), 0),
            new(T.AddTicks(2), HistorianValue.FromDouble(double.NegativeInfinity), badNoCommunication),
            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.Select(r => r.StatusCode).ShouldBe([HistorianStatusCodes.BadOutOfRange, HistorianStatusCodes.BadOutOfRange,
            badNoCommunication, 0u]);
    }

    [Fact]
    public void A_non_bad_Empty_is_stored_BadNoData_and_a_bad_Empty_keeps_its_code()
    {
        var rows = LiveWritePreparer.Prepare(
        [
            new(T, HistorianValue.Empty, 0),
            new(T.AddTicks(1), HistorianValue.Empty, 0x40A40000u),
            new(T.AddTicks(2), HistorianValue.Empty, 0x80310000u),
        ], () => T);
        rows.Select(r => r.StatusCode).ShouldBe([HistorianStatusCodes.BadNoData, HistorianStatusCodes.BadNoData, 0x80310000u]);
    }

    [Fact]
    public void Duplicate_timestamps_keep_the_first_and_null_timestamp_uses_the_clock()
    {
        var rows = LiveWritePreparer.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()
    {
        HistorianDataTypes.FromKind(HistorianValueKind.Double).ShouldBe((byte)DriverDataType.Float64);
        HistorianDataTypes.FromKind(HistorianValueKind.Boolean).ShouldBe((byte)DriverDataType.Boolean);
        HistorianDataTypes.FromKind(HistorianValueKind.Empty).ShouldBe((byte)DriverDataType.Float64);
    }
}