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

namespace JdeScoping.ExcelIO.Tests;

public class HeaderFormatterTests
{
    [Fact]
    public void ApplyHeaderFormat_Cell_AppliesCorrectStyling()
    {
        using var workbook = new XLWorkbook();
        var worksheet = workbook.Worksheets.Add("Test");
        var cell = worksheet.Cell(1, 1);

        HeaderFormatter.ApplyHeaderFormat(cell, "Test Header");

        cell.Value.GetText().ShouldBe("Test Header");
        cell.Style.Font.Bold.ShouldBeTrue();
        cell.Style.Alignment.Horizontal.ShouldBe(XLAlignmentHorizontalValues.Center);
        cell.Style.Fill.BackgroundColor.ShouldBe(XLColor.Gainsboro);
    }

    [Fact]
    public void ApplyHeaderFormat_Cell_WithoutText_AppliesOnlyStyling()
    {
        using var workbook = new XLWorkbook();
        var worksheet = workbook.Worksheets.Add("Test");
        var cell = worksheet.Cell(1, 1);
        cell.Value = "Original";

        HeaderFormatter.ApplyHeaderFormat(cell);

        cell.Value.GetText().ShouldBe("Original");
        cell.Style.Font.Bold.ShouldBeTrue();
    }

    [Fact]
    public void ApplyHeaderFormat_Range_AppliesCorrectStyling()
    {
        using var workbook = new XLWorkbook();
        var worksheet = workbook.Worksheets.Add("Test");
        var range = worksheet.Range(1, 1, 1, 3);

        HeaderFormatter.ApplyHeaderFormat(range, "Header", merge: false);

        range.FirstCell().Value.GetText().ShouldBe("Header");
        foreach (var cell in range.Cells())
        {
            cell.Style.Font.Bold.ShouldBeTrue();
            cell.Style.Fill.BackgroundColor.ShouldBe(XLColor.Gainsboro);
        }
    }

    [Fact]
    public void ApplyHeaderFormat_Range_WithMerge_MergesCells()
    {
        using var workbook = new XLWorkbook();
        var worksheet = workbook.Worksheets.Add("Test");
        var range = worksheet.Range(1, 1, 1, 3);

        HeaderFormatter.ApplyHeaderFormat(range, "Merged Header", merge: true);

        range.IsMerged().ShouldBeTrue();
        range.FirstCell().Value.GetText().ShouldBe("Merged Header");
    }

    [Fact]
    public void ApplyHeaderFormat_Range_WithoutMerge_DoesNotMergeCells()
    {
        using var workbook = new XLWorkbook();
        var worksheet = workbook.Worksheets.Add("Test");
        var range = worksheet.Range(1, 1, 1, 3);

        HeaderFormatter.ApplyHeaderFormat(range, "Not Merged", merge: false);

        range.IsMerged().ShouldBeFalse();
    }
}