using Microsoft.Data.SqlClient.Server;
using Shouldly;
using Xunit;
using ZB.MOM.WW.OtOpcUa.Core.Abstractions;

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

public sealed class SampleRowMapperTests
{
    public static TheoryData<HistorianValue> Values => new()
    {
        HistorianValue.FromDouble(12.5),
        HistorianValue.FromInt64(long.MinValue + 3),
        HistorianValue.FromBoolean(true),
        HistorianValue.FromBoolean(false),
        HistorianValue.FromString("héllo"),
        HistorianValue.FromString(""),
        HistorianValue.FromDateTime(new DateTime(2026, 10, 9, 1, 2, 3, DateTimeKind.Utc).AddTicks(1234567)),
        HistorianValue.Empty,
    };

    [Theory]
    [MemberData(nameof(Values))]
    public void Every_kind_round_trips_through_the_column_quad(HistorianValue v)
    {
        var c = SampleRowMapper.ToColumns(v);
        SampleRowMapper.FromColumns(c.ValueKind, c.NumValue, c.IntValue, c.StrValue).ShouldBe(v);
    }

    [Fact]
    public void Columns_follow_the_spec_mapping()
    {
        SampleRowMapper.ToColumns(HistorianValue.FromInt64(7)).ShouldBe(new SampleColumns(2, 7d, 7L, null));
        SampleRowMapper.ToColumns(HistorianValue.FromBoolean(true)).ShouldBe(new SampleColumns(3, 1d, 1L, null));
        SampleRowMapper.ToColumns(HistorianValue.FromDouble(1.5)).ShouldBe(new SampleColumns(1, 1.5, null, null));
        SampleRowMapper.ToColumns(HistorianValue.Empty).ShouldBe(new SampleColumns(0, null, null, null));
    }

    [Fact]
    public void Status_is_stored_bit_for_bit()
    {
        SampleRowMapper.ToDbStatus(0x80050000u).ShouldBeLessThan(0);
        SampleRowMapper.FromDbStatus(SampleRowMapper.ToDbStatus(0x80050000u)).ShouldBe(0x80050000u);
    }

    [Fact]
    public void Sample_records_keep_sub_millisecond_ticks()
    {
        var t = new DateTime(2026, 10, 9, 0, 0, 0, DateTimeKind.Utc).AddTicks(1234567);
        var rec = SampleRowMapper.ToSampleRecords([new SqlSampleRow(t, HistorianValue.FromDouble(2), 0x80050000u)]).Single();
        rec.GetDateTime(0).Ticks.ShouldBe(t.Ticks);
        rec.GetByte(1).ShouldBe((byte)1);
        rec.GetDouble(2).ShouldBe(2d);
        rec.IsDBNull(3).ShouldBeTrue();
        rec.IsDBNull(4).ShouldBeTrue();
        rec.GetInt32(5).ShouldBe(unchecked((int)0x80050000u));
    }

    [Fact]
    public void Time_records_keep_sub_millisecond_ticks()
    {
        var t = new DateTime(2026, 10, 9, 0, 0, 0, DateTimeKind.Utc).AddTicks(1234567);
        SampleRowMapper.ToTimeRecords([t]).Single().GetDateTime(0).Ticks.ShouldBe(t.Ticks);
    }
}