using ClosedXML.Excel;
using FluentAssertions;
using Workflow.Application.BuildFlow.Common.Services;
using Xunit;

namespace BuildFlow.Workflow.Tests.Performance;

/// <summary>
/// Excel 导入行惰性枚举契约测试。
/// </summary>
public class LazyExcelRowTests
{
    [Fact]
    public void ParseReturnsLazyEnumerableInsteadOfMaterializedList()
    {
        var service = new FormSchemaExcelService();
        var template = service.BuildTemplate(Schema, "惰性导入");
        using var input = new MemoryStream(template);
        using var workbook = new XLWorkbook(input);
        var worksheet = workbook.Worksheets.First();
        worksheet.Cell(2, 1).Value = "first";
        worksheet.Cell(3, 1).Value = "second";
        worksheet.Cell(4, 1).Value = "third";
        using var output = new MemoryStream();
        workbook.SaveAs(output);
        output.Position = 0;

        var rows = service.Parse(Schema, output, 100, 32_767);

        rows.Should().NotBeAssignableTo<IReadOnlyList<ExcelParsedRow>>();
        rows.Take(1).Should().ContainSingle(x =>
            x.RowNumber == 2 && x.JsonObject.Contains("first", StringComparison.Ordinal));
    }

    private const string Schema = """
    {
      "type": "object",
      "properties": {
        "name": { "type": "string", "title": "名称", "required": true, "x-component": "Input" }
      }
    }
    """;
}