using Admin.NET.Plugin.AiDOP.DataPlatform.Sequence;
using Xunit;

namespace Admin.NET.Plugin.AiDOP.Tests.DataPlatform;

public class NbrSequenceFormatterTests
{
    [Fact]
    public void NormalizeDateFormat_StripsCommas()
    {
        Assert.Equal("YYYYMMDD", NbrSequenceFormatter.NormalizeDateFormat("YYYY,MM,DD"));
        Assert.Equal("", NbrSequenceFormatter.NormalizeDateFormat(null));
    }

    [Theory]
    [InlineData("", "", "2026-05-10")]
    [InlineData("YYMMDD", "260510", "2026-05-10")]
    [InlineData("YYYYMMDD", "20260510", "2026-05-10")]
    [InlineData("YYYYMM", "202605", "2026-05-01")]
    [InlineData("yyyymmdd", "20260510", "2026-05-10")] // 陷阱 #4：大小写
    public void ResolvePeriod_MatchesSpec(string fmt, string expectedDateStr, string expectedNbrDate)
    {
        var now = new DateTime(2026, 5, 10, 15, 30, 0);
        var (nbrDate, nbrDateStr) = NbrSequenceFormatter.ResolvePeriod(fmt, now);
        Assert.Equal(expectedDateStr, nbrDateStr);
        Assert.Equal(DateTime.Parse(expectedNbrDate), nbrDate);
    }

    [Fact]
    public void ResolvePadWidth_UsesMaxValueStringLength()
    {
        Assert.Equal(3, NbrSequenceFormatter.ResolvePadWidth(999));
        Assert.Equal(8, NbrSequenceFormatter.ResolvePadWidth(99999999));
    }

    [Fact]
    public void BuildNumber_SmStyle()
    {
        var n = NbrSequenceFormatter.BuildNumber("S", "M", "", "20260510", 5, 3);
        Assert.Equal("SM20260510005", n);
    }

    [Fact]
    public void BuildNumber_WhenSerialWiderThanPad_Throws()
    {
        Assert.Throws<InvalidOperationException>(() =>
            NbrSequenceFormatter.BuildNumber("S", "M", "", "20260510", 1000, 3));
    }

    [Fact]
    public void BuildRange_PrStyleIncrement3()
    {
        var list = NbrSequenceFormatter.BuildRange("P", "R", "", "20260510", 53, 3, 8);
        Assert.Equal(new[] { "PR2026051000000053", "PR2026051000000054", "PR2026051000000055" }, list);
    }
}