using JdeScoping.ExcelIO.Parsing;
using Microsoft.Extensions.Logging.Abstractions;
using NPOI.XSSF.UserModel;
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()
    {
        var excelData = CreateWorkOrderExcel([12345, 67890, 11111]);

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

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

    [Fact]
    public void ParseWorkOrders_SkipsInvalidNumbers()
    {
        using var workbook = new XSSFWorkbook();
        var worksheet = workbook.CreateSheet("Sheet1");
        worksheet.CreateRow(0).CreateCell(0).SetCellValue("Work Order");
        worksheet.CreateRow(1).CreateCell(0).SetCellValue("12345");
        worksheet.CreateRow(2).CreateCell(0).SetCellValue("not-a-number");
        worksheet.CreateRow(3).CreateCell(0).SetCellValue("67890");

        using var ms = new MemoryStream();
        workbook.Write(ms, leaveOpen: true);
        ms.Position = 0;

        var result = _service.ParseWorkOrders(ms);

        result.Count.ShouldBe(2);
    }

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

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

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

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

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

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

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

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

        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()
    {
        var excelData = CreatePartOperationExcel([("ITEM-001", "100.5", "MIS001", "A")]);

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

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

    private static byte[] CreateWorkOrderExcel(long[] workOrderNumbers)
    {
        using var workbook = new XSSFWorkbook();
        var worksheet = workbook.CreateSheet("Sheet1");
        worksheet.CreateRow(0).CreateCell(0).SetCellValue("Work Order Number");
        for (var i = 0; i < workOrderNumbers.Length; i++)
        {
            worksheet.CreateRow(i + 1).CreateCell(0).SetCellValue(workOrderNumbers[i]);
        }

        using var stream = new MemoryStream();
        workbook.Write(stream, leaveOpen: true);
        return stream.ToArray();
    }

    private static byte[] CreateItemExcel(string[] itemNumbers)
    {
        using var workbook = new XSSFWorkbook();
        var worksheet = workbook.CreateSheet("Sheet1");
        worksheet.CreateRow(0).CreateCell(0).SetCellValue("Item Number");
        for (var i = 0; i < itemNumbers.Length; i++)
        {
            worksheet.CreateRow(i + 1).CreateCell(0).SetCellValue(itemNumbers[i]);
        }

        using var stream = new MemoryStream();
        workbook.Write(stream, leaveOpen: true);
        return stream.ToArray();
    }

    private static byte[] CreateComponentLotExcel((string LotNumber, string ItemNumber)[] lots)
    {
        using var workbook = new XSSFWorkbook();
        var worksheet = workbook.CreateSheet("Sheet1");
        var header = worksheet.CreateRow(0);
        header.CreateCell(0).SetCellValue("Lot Number");
        header.CreateCell(1).SetCellValue("Item Number");

        for (var i = 0; i < lots.Length; i++)
        {
            var row = worksheet.CreateRow(i + 1);
            row.CreateCell(0).SetCellValue(lots[i].LotNumber);
            row.CreateCell(1).SetCellValue(lots[i].ItemNumber);
        }

        using var stream = new MemoryStream();
        workbook.Write(stream, leaveOpen: true);
        return stream.ToArray();
    }

    private static byte[] CreatePartOperationExcel((string ItemNumber, string OpNumber, string MisNumber, string MisRevision)[] operations)
    {
        using var workbook = new XSSFWorkbook();
        var worksheet = workbook.CreateSheet("Sheet1");
        var header = worksheet.CreateRow(0);
        header.CreateCell(0).SetCellValue("Item Number");
        header.CreateCell(1).SetCellValue("Operation Number");
        header.CreateCell(2).SetCellValue("MIS Number");
        header.CreateCell(3).SetCellValue("MIS Revision");

        for (var i = 0; i < operations.Length; i++)
        {
            var row = worksheet.CreateRow(i + 1);
            row.CreateCell(0).SetCellValue(operations[i].ItemNumber);
            row.CreateCell(1).SetCellValue(operations[i].OpNumber);
            row.CreateCell(2).SetCellValue(operations[i].MisNumber);
            row.CreateCell(3).SetCellValue(operations[i].MisRevision);
        }

        using var stream = new MemoryStream();
        workbook.Write(stream, leaveOpen: true);
        return stream.ToArray();
    }
}