using Shouldly;
using Xunit;
using ZB.MOM.WW.OtOpcUa.AdminUI.Uns;

namespace ZB.MOM.WW.OtOpcUa.AdminUI.Tests.Uns;

/// <summary>R04 S6: the equipment CSV import reads RFC 4180 through the shared CsvParser.</summary>
[Trait("Category", "Unit")]
public sealed class EquipmentCsvParserTests
{
    private const string Header = "Name,MachineCode,UnsLineId,ZTag,SAPID,Manufacturer,Model";

    [Fact]
    public void A_quoted_comma_stays_in_its_column()
    {
        var (rows, error) = EquipmentCsvParser.Parse(
            Header + "\nPress 1,MC-1,LINE-1,Z1,S1,\"Acme, Inc.\",X200\n");

        error.ShouldBeNull();
        rows!.Single().Manufacturer.ShouldBe("Acme, Inc.");
        // The column after the quoted comma did not shift.
        rows!.Single().Model.ShouldBe("X200");
    }

    [Fact]
    public void Doubled_quotes_crlf_and_blank_lines_parse()
    {
        var (rows, error) = EquipmentCsvParser.Parse(
            Header + "\r\n\r\n\"Press \"\"A\"\"\",MC-1,LINE-1,,,,\r\nPress B,MC-2,LINE-1\r\n");

        error.ShouldBeNull();
        rows!.Select(r => r.Name).ShouldBe(["Press \"A\"", "Press B"]);
        rows![0].ZTag.ShouldBeNull();
        rows[1].Manufacturer.ShouldBeNull();
    }

    [Fact]
    public void Header_and_shape_errors_are_reported()
    {
        EquipmentCsvParser.Parse("").Error.ShouldBe("CSV is empty.");
        EquipmentCsvParser.Parse(Header).Error.ShouldBe("Need a header row and at least one data row.");
        EquipmentCsvParser.Parse("Name,Code,UnsLineId\na,b,c").Error!.ShouldContain("Header column #2 must be 'MachineCode'");
        EquipmentCsvParser.Parse(Header + "\nonly,two").Error!.ShouldContain("Row 1: too few columns");
    }

    [Fact]
    public void Malformed_quoting_is_an_error_not_a_guess()
    {
        var (rows, error) = EquipmentCsvParser.Parse(Header + "\nPress,MC-1,LINE-1,\"unterminated\n");

        rows.ShouldBeNull();
        error!.ShouldStartWith("The CSV is malformed:");
    }

    [Fact]
    public void Modal_delegates_to_the_parser()
    {
        var src = AdminUiSource.Read("Components", "Shared", "Uns", "ImportEquipmentModal.razor");
        src.ShouldContain("EquipmentCsvParser.Parse(csv)");
        src.ShouldNotContain(".Split(',')");
    }
}