using JdeScoping.ConfigManager.ViewModels;

namespace JdeScoping.ConfigManager.Tests.ViewModels;

public class TreeNodeViewModelTests
{
    [Fact]
    public void Constructor_SetsProperties()
    {
        // Arrange & Act
        var node = new TreeNodeViewModel("DataSync", "⟳", TreeNodeType.SettingsSection);

        // Assert
        node.Name.ShouldBe("DataSync");
        node.Icon.ShouldBe("⟳");
        node.NodeType.ShouldBe(TreeNodeType.SettingsSection);
    }

    [Fact]
    public void IsModified_WhenSet_RaisesPropertyChanged()
    {
        // Arrange
        var node = new TreeNodeViewModel("Test", "📁", TreeNodeType.Folder);
        var propertyChangedRaised = false;
        node.PropertyChanged += (s, e) =>
        {
            if (e.PropertyName == nameof(TreeNodeViewModel.IsModified))
                propertyChangedRaised = true;
        };

        // Act
        node.IsModified = true;

        // Assert
        propertyChangedRaised.ShouldBeTrue();
    }

    [Fact]
    public void IsExpanded_WhenSet_RaisesPropertyChanged()
    {
        // Arrange
        var node = new TreeNodeViewModel("Test", "📁", TreeNodeType.Folder);
        var propertyChangedRaised = false;
        node.PropertyChanged += (s, e) =>
        {
            if (e.PropertyName == nameof(TreeNodeViewModel.IsExpanded))
                propertyChangedRaised = true;
        };

        // Act
        node.IsExpanded = true;

        // Assert
        propertyChangedRaised.ShouldBeTrue();
        node.IsExpanded.ShouldBeTrue();
    }

    [Fact]
    public void IsSelected_WhenSet_RaisesPropertyChanged()
    {
        // Arrange
        var node = new TreeNodeViewModel("Test", "📁", TreeNodeType.Folder);
        var propertyChangedRaised = false;
        node.PropertyChanged += (s, e) =>
        {
            if (e.PropertyName == nameof(TreeNodeViewModel.IsSelected))
                propertyChangedRaised = true;
        };

        // Act
        node.IsSelected = true;

        // Assert
        propertyChangedRaised.ShouldBeTrue();
        node.IsSelected.ShouldBeTrue();
    }

    [Fact]
    public void ValidationState_WhenSetToValid_StatusIconIsCheckmark()
    {
        // Arrange
        var node = new TreeNodeViewModel("Test", "📁", TreeNodeType.Folder);

        // Act
        node.ValidationState = ValidationState.Valid;

        // Assert
        node.StatusIcon.ShouldBe("✓");
    }

    [Fact]
    public void ValidationState_WhenSetToWarning_StatusIconIsWarning()
    {
        // Arrange
        var node = new TreeNodeViewModel("Test", "📁", TreeNodeType.Folder);

        // Act
        node.ValidationState = ValidationState.Warning;

        // Assert
        node.StatusIcon.ShouldBe("⚠");
    }

    [Fact]
    public void ValidationState_WhenSetToError_StatusIconIsX()
    {
        // Arrange
        var node = new TreeNodeViewModel("Test", "📁", TreeNodeType.Folder);

        // Act
        node.ValidationState = ValidationState.Error;

        // Assert
        node.StatusIcon.ShouldBe("✗");
    }

    [Fact]
    public void ValidationState_WhenSetToUnknown_StatusIconIsEmpty()
    {
        // Arrange
        var node = new TreeNodeViewModel("Test", "📁", TreeNodeType.Folder);

        // Act
        node.ValidationState = ValidationState.Unknown;

        // Assert
        node.StatusIcon.ShouldBe("");
    }

    [Fact]
    public void ValidationState_WhenChanged_RaisesPropertyChangedForStatusIcon()
    {
        // Arrange
        var node = new TreeNodeViewModel("Test", "📁", TreeNodeType.Folder);
        var statusIconPropertyChanged = false;
        node.PropertyChanged += (s, e) =>
        {
            if (e.PropertyName == nameof(TreeNodeViewModel.StatusIcon))
                statusIconPropertyChanged = true;
        };

        // Act
        node.ValidationState = ValidationState.Valid;

        // Assert
        statusIconPropertyChanged.ShouldBeTrue();
    }

    [Fact]
    public void SectionKey_CanBeSetViaInitializer()
    {
        // Arrange & Act
        var node = new TreeNodeViewModel("DataSync", "⟳", TreeNodeType.SettingsSection)
        {
            SectionKey = "DataSync"
        };

        // Assert
        node.SectionKey.ShouldBe("DataSync");
    }

    [Fact]
    public void Children_IsInitialized()
    {
        // Arrange & Act
        var node = new TreeNodeViewModel("Test", "📁", TreeNodeType.Folder);

        // Assert
        node.Children.ShouldNotBeNull();
        node.Children.ShouldBeEmpty();
    }

    [Fact]
    public void Children_CanAddChildNodes()
    {
        // Arrange
        var parent = new TreeNodeViewModel("Settings", "📁", TreeNodeType.Folder);
        var child = new TreeNodeViewModel("DataSync", "⟳", TreeNodeType.SettingsSection);

        // Act
        parent.Children.Add(child);

        // Assert
        parent.Children.Count.ShouldBe(1);
        parent.Children[0].ShouldBe(child);
    }

    [Theory]
    [InlineData(TreeNodeType.Folder)]
    [InlineData(TreeNodeType.SettingsSection)]
    [InlineData(TreeNodeType.Pipeline)]
    public void NodeType_CanBeSetForAllTypes(TreeNodeType nodeType)
    {
        // Arrange & Act
        var node = new TreeNodeViewModel("Test", "📁", nodeType);

        // Assert
        node.NodeType.ShouldBe(nodeType);
    }

    [Fact]
    public void IsModified_WhenSetToSameValue_DoesNotRaisePropertyChanged()
    {
        // Arrange
        var node = new TreeNodeViewModel("Test", "📁", TreeNodeType.Folder);
        node.IsModified = true;

        var propertyChangedRaised = false;
        node.PropertyChanged += (s, e) =>
        {
            if (e.PropertyName == nameof(TreeNodeViewModel.IsModified))
                propertyChangedRaised = true;
        };

        // Act
        node.IsModified = true; // Same value

        // Assert
        propertyChangedRaised.ShouldBeFalse();
    }
}