using ClosedXML.Excel;
using JdeScoping.ExcelIO.Options;
using JdeScoping.ExcelIO.Generators;
using JdeScoping.ExcelIO.Helpers;
using JdeScoping.ExcelIO.Models.Reporting;
using Microsoft.Extensions.Logging;
using Microsoft.Extensions.Options;
using NSubstitute;
using Shouldly;
using Xunit;

namespace JdeScoping.ExcelIO.Tests;

public class ExcelExportServiceTests
{
    private readonly ExcelExportService _service;
    private readonly ILogger<ExcelExportService> _logger;
    private readonly IOptions<ExcelExportOptions> _options;

    public ExcelExportServiceTests()
    {
        _logger = Substitute.For<ILogger<ExcelExportService>>();
        _options = Microsoft.Extensions.Options.Options.Create(new ExcelExportOptions
        {
            CriteriaSheetPassword = "TestCriteriaPass",
            DataSheetPassword = "TestDataPass"
        });

        var cache = new OutputColumnCache();
        var tableWriter = new AttributeTableWriter(cache);
        var criteriaGenerator = new CriteriaSheetGenerator(_options, tableWriter);

        _service = new ExcelExportService(_logger, _options, criteriaGenerator, tableWriter);
    }

    [Fact]
    public async Task GenerateAsync_ReturnsValidExcelBytes()
    {
        var search = CreateMinimalSearchModel();

        var result = await _service.GenerateAsync(search);

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

        // Verify it's a valid Excel file
        using var stream = new MemoryStream(result);
        using var workbook = new XLWorkbook(stream);
        workbook.Worksheets.Count.ShouldBeGreaterThanOrEqualTo(2);
    }

    [Fact]
    public async Task GenerateAsync_CreatesSearchCriteriaSheet()
    {
        var search = CreateMinimalSearchModel();

        var result = await _service.GenerateAsync(search);

        using var stream = new MemoryStream(result);
        using var workbook = new XLWorkbook(stream);

        workbook.Worksheets.TryGetWorksheet("Search Criteria", out var criteriaSheet).ShouldBeTrue();
        criteriaSheet.ShouldNotBeNull();
    }

    [Fact]
    public async Task GenerateAsync_CreatesSearchResultsSheet()
    {
        var search = CreateMinimalSearchModel();

        var result = await _service.GenerateAsync(search);

        using var stream = new MemoryStream(result);
        using var workbook = new XLWorkbook(stream);

        workbook.Worksheets.TryGetWorksheet("Search Results", out var resultsSheet).ShouldBeTrue();
        resultsSheet.ShouldNotBeNull();
    }

    [Fact]
    public async Task GenerateAsync_WithMisData_CreatesMisInfoSheet()
    {
        var search = CreateSearchModelWithMisData();

        var result = await _service.GenerateAsync(search);

        using var stream = new MemoryStream(result);
        using var workbook = new XLWorkbook(stream);

        workbook.Worksheets.Count.ShouldBe(4); // Criteria, Results, MIS Info, Investigation
        workbook.Worksheets.TryGetWorksheet("MIS Info", out var misSheet).ShouldBeTrue();
        misSheet.ShouldNotBeNull();
    }

    [Fact]
    public async Task GenerateAsync_WithMisData_CreatesInvestigationSheet()
    {
        var search = CreateSearchModelWithMisData();

        var result = await _service.GenerateAsync(search);

        using var stream = new MemoryStream(result);
        using var workbook = new XLWorkbook(stream);

        workbook.Worksheets.TryGetWorksheet("Investigation", out var investigationSheet).ShouldBeTrue();
        investigationSheet.ShouldNotBeNull();
    }

    [Fact]
    public async Task GenerateAsync_WithoutMisData_DoesNotCreateMisSheets()
    {
        var search = CreateMinimalSearchModel();
        search.ExtractMisData = false;

        var result = await _service.GenerateAsync(search);

        using var stream = new MemoryStream(result);
        using var workbook = new XLWorkbook(stream);

        workbook.Worksheets.Count.ShouldBe(2); // Only Criteria and Results
    }

    [Fact]
    public async Task GenerateAsync_CancellationRequested_ThrowsOperationCanceled()
    {
        var search = CreateMinimalSearchModel();
        var cts = new CancellationTokenSource();
        cts.Cancel();

        await Should.ThrowAsync<OperationCanceledException>(
            () => _service.GenerateAsync(search, cts.Token));
    }

    [Fact]
    public async Task GenerateAsync_CriteriaSheet_ContainsSearchName()
    {
        var search = CreateMinimalSearchModel();
        search.Name = "Test Search Name";

        var result = await _service.GenerateAsync(search);

        using var stream = new MemoryStream(result);
        using var workbook = new XLWorkbook(stream);
        var criteriaSheet = workbook.Worksheet("Search Criteria");

        criteriaSheet.Cell(1, 2).Value.GetText().ShouldBe("Test Search Name");
    }

    [Fact]
    public async Task GenerateAsync_CriteriaSheet_ContainsUserName()
    {
        var search = CreateMinimalSearchModel();
        search.UserName = "testuser";

        var result = await _service.GenerateAsync(search);

        using var stream = new MemoryStream(result);
        using var workbook = new XLWorkbook(stream);
        var criteriaSheet = workbook.Worksheet("Search Criteria");

        criteriaSheet.Cell(2, 2).Value.GetText().ShouldBe("testuser");
    }

    [Fact]
    public async Task GenerateAsync_ResultsSheet_ContainsResultData()
    {
        var search = CreateMinimalSearchModel();
        search.Results.Add(new SearchResult
        {
            WorkOrderNumber = 12345,
            ItemNumber = "ITEM-001",
            LotNumber = "LOT-001",
            Flagged = true
        });

        var result = await _service.GenerateAsync(search);

        using var stream = new MemoryStream(result);
        using var workbook = new XLWorkbook(stream);
        var resultsSheet = workbook.Worksheet("Search Results");

        // Check header row
        resultsSheet.Cell(1, 1).Value.GetText().ShouldBe("Work Order Number");

        // Check data row
        resultsSheet.Cell(2, 1).Value.GetNumber().ShouldBe(12345);
    }

    private static SearchModel CreateMinimalSearchModel()
    {
        return new SearchModel
        {
            Id = 1,
            Name = "Test Search",
            UserName = "testuser",
            SubmitDt = DateTime.Now.AddHours(-1),
            StartDt = DateTime.Now.AddMinutes(-30),
            EndDt = DateTime.Now,
            ExtractMisData = false,
            Results = []
        };
    }

    private static SearchModel CreateSearchModelWithMisData()
    {
        return new SearchModel
        {
            Id = 1,
            Name = "Test Search with MIS",
            UserName = "testuser",
            SubmitDt = DateTime.Now.AddHours(-1),
            StartDt = DateTime.Now.AddMinutes(-30),
            EndDt = DateTime.Now,
            ExtractMisData = true,
            Results = [
                new SearchResult { WorkOrderNumber = 12345, Flagged = true }
            ],
            MisResults = [
                new MisSearchResult { ItemNumber = "ITEM-001", MisNumber = "MIS-001" }
            ],
            MisNonMatchResults = [
                new MisNonMatchSearchResult { WorkOrderNumber = 12345, ItemNumber = "ITEM-001" }
            ]
        };
    }
}