using Avalonia.Controls;
using Avalonia.Headless.XUnit;
using Avalonia.VisualTree;
using JdeScoping.ConfigManager.Ui.Views.Forms;

namespace JdeScoping.ConfigManager.Ui.Tests.Views.Forms;

/// <summary>
/// UI tests for form views.
/// </summary>
public class FormViewTests
{
    /// <summary>
    /// Creates a test window to host a UserControl and shows it.
    /// UserControls must be attached to a Window to have their visual tree built.
    /// </summary>
    private static Window ShowInTestWindow(Control content)
    {
        var window = new Window { Content = content };
        window.Show();
        return window;
    }

    /// <summary>
    /// Verifies that AuthFormView renders with the expected controls.
    /// </summary>
    [AvaloniaFact]
    public void AuthFormView_RendersWithCorrectControls()
    {
        // Arrange
        var view = new AuthFormView();
        ShowInTestWindow(view);

        // Assert - AuthFormView contains TextBox for CookieName and NumericUpDown for expiration
        var textBoxes = view.GetVisualDescendants().OfType<TextBox>().ToList();
        textBoxes.Count.ShouldBeGreaterThan(0);

        var numericUpDowns = view.GetVisualDescendants().OfType<NumericUpDown>().ToList();
        numericUpDowns.Count.ShouldBeGreaterThan(0);

        // Verify header is present
        var textBlocks = view.GetVisualDescendants().OfType<TextBlock>().ToList();
        textBlocks.Any(tb => tb.Text == "Authentication Settings").ShouldBeTrue();
        textBlocks.Any(tb => tb.Text == "Cookie Settings").ShouldBeTrue();
    }

    /// <summary>
    /// Verifies that DataSyncFormView renders with the expected controls.
    /// </summary>
    [AvaloniaFact]
    public void DataSyncFormView_RendersWithCorrectControls()
    {
        // Arrange
        var view = new DataSyncFormView();
        ShowInTestWindow(view);

        // Assert - DataSyncFormView contains CheckBox for Enabled and multiple NumericUpDowns
        var checkBoxes = view.GetVisualDescendants().OfType<CheckBox>().ToList();
        checkBoxes.Count.ShouldBeGreaterThan(0);

        var numericUpDowns = view.GetVisualDescendants().OfType<NumericUpDown>().ToList();
        numericUpDowns.Count.ShouldBeGreaterThanOrEqualTo(6); // Check Interval, Timeout, Max Parallelism, Batch Size, Bulk Copy Batch Size, Lookback Multiplier, Purge Retention

        // Verify section headers
        var textBlocks = view.GetVisualDescendants().OfType<TextBlock>().ToList();
        textBlocks.Any(tb => tb.Text == "Data Sync Settings").ShouldBeTrue();
        textBlocks.Any(tb => tb.Text == "Sync Intervals").ShouldBeTrue();
        textBlocks.Any(tb => tb.Text == "Performance").ShouldBeTrue();
        textBlocks.Any(tb => tb.Text == "Data Retention").ShouldBeTrue();
    }

    /// <summary>
    /// Verifies that ConnectionStringsFormView renders with a DataGrid.
    /// </summary>
    [AvaloniaFact]
    public void ConnectionStringsFormView_RendersDataGrid()
    {
        // Arrange
        var view = new ConnectionStringsFormView();
        ShowInTestWindow(view);

        // Assert - ConnectionStringsFormView contains a DataGrid for connections
        var dataGrid = view.FindDescendantOfType<DataGrid>();
        dataGrid.ShouldNotBeNull();

        // Verify header is present
        var textBlocks = view.GetVisualDescendants().OfType<TextBlock>().ToList();
        textBlocks.Any(tb => tb.Text == "Connection Strings").ShouldBeTrue();
        textBlocks.Any(tb => tb.Text == "Connections").ShouldBeTrue();
    }

    /// <summary>
    /// Verifies that ConnectionStringsFormView has Add and Delete buttons.
    /// </summary>
    [AvaloniaFact]
    public void ConnectionStringsFormView_HasAddAndDeleteButtons()
    {
        // Arrange
        var view = new ConnectionStringsFormView();
        ShowInTestWindow(view);

        // Assert
        var buttons = view.GetVisualDescendants().OfType<Button>().ToList();

        // Find buttons containing TextBlock with Add/Delete text
        var buttonTexts = buttons
            .SelectMany(b => b.GetVisualDescendants().OfType<TextBlock>())
            .Select(tb => tb.Text)
            .ToList();

        buttonTexts.ShouldContain("Add");
        buttonTexts.ShouldContain("Delete");
    }

    /// <summary>
    /// Verifies that LdapFormView renders with server URL list input.
    /// </summary>
    [AvaloniaFact]
    public void LdapFormView_RendersServerList()
    {
        // Arrange
        var view = new LdapFormView();
        ShowInTestWindow(view);

        // Assert - LdapFormView contains TextBoxes for server URLs, Group DN, Search Base
        var textBoxes = view.GetVisualDescendants().OfType<TextBox>().ToList();
        textBoxes.Count.ShouldBeGreaterThanOrEqualTo(3); // Server URLs, Group DN, Search Base, Admin Bypass Users

        // Verify section headers
        var textBlocks = view.GetVisualDescendants().OfType<TextBlock>().ToList();
        textBlocks.Any(tb => tb.Text == "LDAP Settings").ShouldBeTrue();
        textBlocks.Any(tb => tb.Text == "Server Configuration").ShouldBeTrue();
        textBlocks.Any(tb => tb.Text == "Directory Structure").ShouldBeTrue();
    }

    /// <summary>
    /// Verifies that LdapFormView contains a CheckBox for fake authentication.
    /// </summary>
    [AvaloniaFact]
    public void LdapFormView_HasFakeAuthCheckBox()
    {
        // Arrange
        var view = new LdapFormView();
        ShowInTestWindow(view);

        // Assert
        var checkBoxes = view.GetVisualDescendants().OfType<CheckBox>().ToList();
        checkBoxes.Count.ShouldBeGreaterThan(0);

        // Verify development options section
        var textBlocks = view.GetVisualDescendants().OfType<TextBlock>().ToList();
        textBlocks.Any(tb => tb.Text == "Development Options").ShouldBeTrue();
    }

    /// <summary>
    /// Verifies that LdapFormView contains a NumericUpDown for connection timeout.
    /// </summary>
    [AvaloniaFact]
    public void LdapFormView_HasConnectionTimeoutNumericUpDown()
    {
        // Arrange
        var view = new LdapFormView();
        ShowInTestWindow(view);

        // Assert
        var numericUpDowns = view.GetVisualDescendants().OfType<NumericUpDown>().ToList();
        numericUpDowns.Count.ShouldBeGreaterThan(0);

        // Verify timeout label is present
        var textBlocks = view.GetVisualDescendants().OfType<TextBlock>().ToList();
        textBlocks.Any(tb => tb.Text == "Connection Timeout (seconds)").ShouldBeTrue();
    }

    /// <summary>
    /// Verifies that AuthFormView contains a ScrollViewer.
    /// </summary>
    [AvaloniaFact]
    public void AuthFormView_ContainsScrollViewer()
    {
        // Arrange
        var view = new AuthFormView();
        ShowInTestWindow(view);

        // Assert
        var scrollViewer = view.FindDescendantOfType<ScrollViewer>();
        scrollViewer.ShouldNotBeNull();
    }

    /// <summary>
    /// Verifies that DataSyncFormView contains a ScrollViewer.
    /// </summary>
    [AvaloniaFact]
    public void DataSyncFormView_ContainsScrollViewer()
    {
        // Arrange
        var view = new DataSyncFormView();
        ShowInTestWindow(view);

        // Assert
        var scrollViewer = view.FindDescendantOfType<ScrollViewer>();
        scrollViewer.ShouldNotBeNull();
    }

    /// <summary>
    /// Verifies that ConnectionStringsFormView contains a ScrollViewer.
    /// </summary>
    [AvaloniaFact]
    public void ConnectionStringsFormView_ContainsScrollViewer()
    {
        // Arrange
        var view = new ConnectionStringsFormView();
        ShowInTestWindow(view);

        // Assert
        var scrollViewer = view.FindDescendantOfType<ScrollViewer>();
        scrollViewer.ShouldNotBeNull();
    }

    /// <summary>
    /// Verifies that LdapFormView contains a ScrollViewer.
    /// </summary>
    [AvaloniaFact]
    public void LdapFormView_ContainsScrollViewer()
    {
        // Arrange
        var view = new LdapFormView();
        ShowInTestWindow(view);

        // Assert
        var scrollViewer = view.FindDescendantOfType<ScrollViewer>();
        scrollViewer.ShouldNotBeNull();
    }
}