using ClosedXML.Excel;
using JdeScoping.ExcelIO.Parsing;
using Microsoft.Extensions.Logging.Abstractions;
using Shouldly;
using Xunit;

namespace JdeScoping.ExcelIO.Tests.Parsing;

public class ExcelParserServiceTests
{
    private readonly ExcelParserService _service = new(NullLogger<ExcelParserService>.Instance);

    [Fact]
    public void ParseWorkOrders_ReturnsWorkOrderNumbers()
    {
        // Arrange
        var excelData = CreateWorkOrderExcel([12345, 67890, 11111]);

        // Act
        using var stream = new MemoryStream(excelData);
        var result = _service.ParseWorkOrders(stream);

        // Assert
        result.Count.ShouldBe(3);
        result.ShouldContain(12345);
        result.ShouldContain(67890);
        result.ShouldContain(11111);
    }

    [Fact]
    public void ParseWorkOrders_SkipsInvalidNumbers()
    {
        // Arrange
        using var workbook = new XLWorkbook();
        var worksheet = workbook.Worksheets.Add("Sheet1");
        worksheet.Cell(1, 1).Value = "Work Order";
        worksheet.Cell(2, 1).Value = "12345";
        worksheet.Cell(3, 1).Value = "not-a-number";
        worksheet.Cell(4, 1).Value = "67890";

        using var ms = new MemoryStream();
        workbook.SaveAs(ms);
        ms.Position = 0;

        // Act
        var result = _service.ParseWorkOrders(ms);

        // Assert
        result.Count.ShouldBe(2);
    }

    [Fact]
    public void ParseItems_ReturnsItemNumbers()
    {
        // Arrange
        var excelData = CreateItemExcel(["ITEM-001", "ITEM-002"]);

        // Act
        using var stream = new MemoryStream(excelData);
        var result = _service.ParseItems(stream);

        // Assert
        result.Count.ShouldBe(2);
        result.ShouldContain("ITEM-001");
        result.ShouldContain("ITEM-002");
    }

    [Fact]
    public void ParseComponentLots_ReturnsLotViewModels()
    {
        // Arrange
        var excelData = CreateComponentLotExcel([("LOT001", "ITEM-001"), ("LOT002", "ITEM-002")]);

        // Act
        using var stream = new MemoryStream(excelData);
        var result = _service.ParseComponentLots(stream);

        // Assert
        result.Count.ShouldBe(2);
        result[0].LotNumber.ShouldBe("LOT001");
        result[0].ItemNumber.ShouldBe("ITEM-001");
    }

    [Fact]
    public void ParsePartOperations_ReturnsPartOperations()
    {
        // Arrange
        var excelData = CreatePartOperationExcel([("ITEM-001", "100", "MIS001", "A")]);

        // Act
        using var stream = new MemoryStream(excelData);
        var result = _service.ParsePartOperations(stream);

        // Assert
        result.Count.ShouldBe(1);
        result[0].ItemNumber.ShouldBe("ITEM-001");
        result[0].OperationNumber.ShouldBe("100");
        result[0].MisNumber.ShouldBe("MIS001");
        result[0].MisRevision.ShouldBe("A");
    }

    [Fact]
    public void ParsePartOperations_TruncatesDecimalOperationNumbers()
    {
        // Arrange
        var excelData = CreatePartOperationExcel([("ITEM-001", "100.5", "MIS001", "A")]);

        // Act
        using var stream = new MemoryStream(excelData);
        var result = _service.ParsePartOperations(stream);

        // Assert
        result[0].OperationNumber.ShouldBe("100");
    }

    private static byte[] CreateWorkOrderExcel(long[] workOrderNumbers)
    {
        using var workbook = new XLWorkbook();
        var worksheet = workbook.Worksheets.Add("Sheet1");
        worksheet.Cell(1, 1).Value = "Work Order Number";
        for (var i = 0; i < workOrderNumbers.Length; i++)
        {
            worksheet.Cell(i + 2, 1).Value = workOrderNumbers[i];
        }
        using var stream = new MemoryStream();
        workbook.SaveAs(stream);
        return stream.ToArray();
    }

    private static byte[] CreateItemExcel(string[] itemNumbers)
    {
        using var workbook = new XLWorkbook();
        var worksheet = workbook.Worksheets.Add("Sheet1");
        worksheet.Cell(1, 1).Value = "Item Number";
        for (var i = 0; i < itemNumbers.Length; i++)
        {
            worksheet.Cell(i + 2, 1).Value = itemNumbers[i];
        }
        using var stream = new MemoryStream();
        workbook.SaveAs(stream);
        return stream.ToArray();
    }

    private static byte[] CreateComponentLotExcel((string LotNumber, string ItemNumber)[] lots)
    {
        using var workbook = new XLWorkbook();
        var worksheet = workbook.Worksheets.Add("Sheet1");
        worksheet.Cell(1, 1).Value = "Lot Number";
        worksheet.Cell(1, 2).Value = "Item Number";
        for (var i = 0; i < lots.Length; i++)
        {
            worksheet.Cell(i + 2, 1).Value = lots[i].LotNumber;
            worksheet.Cell(i + 2, 2).Value = lots[i].ItemNumber;
        }
        using var stream = new MemoryStream();
        workbook.SaveAs(stream);
        return stream.ToArray();
    }

    private static byte[] CreatePartOperationExcel((string ItemNumber, string OpNumber, string MisNumber, string MisRevision)[] operations)
    {
        using var workbook = new XLWorkbook();
        var worksheet = workbook.Worksheets.Add("Sheet1");
        worksheet.Cell(1, 1).Value = "Item Number";
        worksheet.Cell(1, 2).Value = "Operation Number";
        worksheet.Cell(1, 3).Value = "MIS Number";
        worksheet.Cell(1, 4).Value = "MIS Revision";
        for (var i = 0; i < operations.Length; i++)
        {
            worksheet.Cell(i + 2, 1).Value = operations[i].ItemNumber;
            worksheet.Cell(i + 2, 2).Value = operations[i].OpNumber;
            worksheet.Cell(i + 2, 3).Value = operations[i].MisNumber;
            worksheet.Cell(i + 2, 4).Value = operations[i].MisRevision;
        }
        using var stream = new MemoryStream();
        workbook.SaveAs(stream);
        return stream.ToArray();
    }
}