using ClosedXML.Excel;
using JdeScoping.ExcelIO.Generators;
using Shouldly;
using Xunit;

namespace JdeScoping.ExcelIO.Tests;

public class DataEntryTemplateGeneratorTests
{
    private readonly DataEntryTemplateGenerator _generator = new();

    [Fact]
    public void Generate_SingleColumn_ReturnsValidExcel()
    {
        var result = _generator.Generate<string>(null, "Test Header");

        result.ShouldNotBeNull();
        result.Length.ShouldBeGreaterThan(0);

        using var stream = new MemoryStream(result);
        using var workbook = new XLWorkbook(stream);
        workbook.Worksheets.Count.ShouldBe(1);
    }

    [Fact]
    public void Generate_SingleColumn_HasCorrectHeader()
    {
        var result = _generator.Generate<string>(null, "Item Numbers");

        using var stream = new MemoryStream(result);
        using var workbook = new XLWorkbook(stream);
        var worksheet = workbook.Worksheets.First();

        worksheet.Cell(1, 1).Value.GetText().ShouldBe("Item Numbers");
    }

    [Fact]
    public void Generate_SingleColumn_HasHeaderFormatting()
    {
        var result = _generator.Generate<string>(null, "Test Header");

        using var stream = new MemoryStream(result);
        using var workbook = new XLWorkbook(stream);
        var worksheet = workbook.Worksheets.First();
        var headerCell = worksheet.Cell(1, 1);

        headerCell.Style.Font.Bold.ShouldBeTrue();
        headerCell.Style.Fill.BackgroundColor.ShouldBe(XLColor.Gainsboro);
    }

    [Fact]
    public void Generate_SingleColumn_WithData_PopulatesRows()
    {
        var data = new List<string> { "Item1", "Item2", "Item3" };

        var result = _generator.Generate(data, "Items");

        using var stream = new MemoryStream(result);
        using var workbook = new XLWorkbook(stream);
        var worksheet = workbook.Worksheets.First();

        worksheet.Cell(2, 1).Value.GetText().ShouldBe("Item1");
        worksheet.Cell(3, 1).Value.GetText().ShouldBe("Item2");
        worksheet.Cell(4, 1).Value.GetText().ShouldBe("Item3");
    }

    [Fact]
    public void Generate_SingleColumn_SetsTextFormat()
    {
        var result = _generator.Generate<string>(null, "Test");

        using var stream = new MemoryStream(result);
        using var workbook = new XLWorkbook(stream);
        var worksheet = workbook.Worksheets.First();

        worksheet.Column(1).Style.NumberFormat.Format.ShouldBe("@");
    }

    [Fact]
    public void Generate_MultiColumn_ReturnsValidExcel()
    {
        var headers = new[] { "Column A", "Column B", "Column C" };

        var result = _generator.Generate(null, headers);

        result.ShouldNotBeNull();

        using var stream = new MemoryStream(result);
        using var workbook = new XLWorkbook(stream);
        var worksheet = workbook.Worksheets.First();

        worksheet.Cell(1, 1).Value.GetText().ShouldBe("Column A");
        worksheet.Cell(1, 2).Value.GetText().ShouldBe("Column B");
        worksheet.Cell(1, 3).Value.GetText().ShouldBe("Column C");
    }

    [Fact]
    public void Generate_MultiColumn_WithData_PopulatesRows()
    {
        var headers = new[] { "Name", "Value" };
        var data = new[]
        {
            new object[] { "Row1", 100 },
            new object[] { "Row2", 200 }
        };

        var result = _generator.Generate(data, headers);

        using var stream = new MemoryStream(result);
        using var workbook = new XLWorkbook(stream);
        var worksheet = workbook.Worksheets.First();

        worksheet.Cell(2, 1).Value.GetText().ShouldBe("Row1");
        worksheet.Cell(2, 2).Value.GetNumber().ShouldBe(100);
        worksheet.Cell(3, 1).Value.GetText().ShouldBe("Row2");
        worksheet.Cell(3, 2).Value.GetNumber().ShouldBe(200);
    }

    [Fact]
    public void Generate_MultiColumn_SetsColumnWidth()
    {
        var headers = new[] { "Column A", "Column B" };

        var result = _generator.Generate(null, headers);

        using var stream = new MemoryStream(result);
        using var workbook = new XLWorkbook(stream);
        var worksheet = workbook.Worksheets.First();

        worksheet.Column(1).Width.ShouldBe(65);
        worksheet.Column(2).Width.ShouldBe(65);
    }

    [Fact]
    public void Generate_SingleColumn_SetsColumnWidth()
    {
        var result = _generator.Generate<string>(null, "Test");

        using var stream = new MemoryStream(result);
        using var workbook = new XLWorkbook(stream);
        var worksheet = workbook.Worksheets.First();

        worksheet.Column(1).Width.ShouldBe(45);
    }
}