using NSubstitute;
using Shouldly;
using Xunit;
using JdeScoping.SecureStoreManager.Services;
using JdeScoping.SecureStoreManager.ViewModels;

namespace JdeScoping.SecureStoreManager.Tests.ViewModels;

public class SecretItemViewModelTests
{
    private readonly IClipboardService _mockClipboardService;

    public SecretItemViewModelTests()
    {
        _mockClipboardService = Substitute.For<IClipboardService>();
    }

    [Fact]
    public void Constructor_InitializesKey()
    {
        // Arrange & Act
        var sut = new SecretItemViewModel("testKey", "testValue", _mockClipboardService);

        // Assert
        sut.Key.ShouldBe("testKey");
    }

    [Fact]
    public void Constructor_InitializesActualValue()
    {
        // Arrange & Act
        var sut = new SecretItemViewModel("testKey", "testValue", _mockClipboardService);

        // Assert
        sut.ActualValue.ShouldBe("testValue");
    }

    [Fact]
    public void Constructor_InitializesIsValueVisibleToFalse()
    {
        // Arrange & Act
        var sut = new SecretItemViewModel("testKey", "testValue", _mockClipboardService);

        // Assert
        sut.IsValueVisible.ShouldBeFalse();
    }

    [Fact]
    public void DisplayValue_WhenNotVisible_ReturnsMaskedValue()
    {
        // Arrange
        var sut = new SecretItemViewModel("testKey", "testValue", _mockClipboardService);

        // Act & Assert
        sut.DisplayValue.ShouldBe("********");
    }

    [Fact]
    public void DisplayValue_WhenVisible_ReturnsActualValue()
    {
        // Arrange
        var sut = new SecretItemViewModel("testKey", "testValue", _mockClipboardService);

        // Act
        sut.IsValueVisible = true;

        // Assert
        sut.DisplayValue.ShouldBe("testValue");
    }

    [Fact]
    public void ToggleVisibilityCommand_TogglesIsValueVisible()
    {
        // Arrange
        var sut = new SecretItemViewModel("testKey", "testValue", _mockClipboardService);
        sut.IsValueVisible.ShouldBeFalse();

        // Act
        sut.ToggleVisibilityCommand.Execute(null);

        // Assert
        sut.IsValueVisible.ShouldBeTrue();
    }

    [Fact]
    public void ToggleVisibilityCommand_TogglesBackToHidden()
    {
        // Arrange
        var sut = new SecretItemViewModel("testKey", "testValue", _mockClipboardService);
        sut.IsValueVisible = true;

        // Act
        sut.ToggleVisibilityCommand.Execute(null);

        // Assert
        sut.IsValueVisible.ShouldBeFalse();
    }

    [Fact]
    public async Task CopyToClipboardCommand_CallsClipboardService()
    {
        // Arrange
        var sut = new SecretItemViewModel("testKey", "secretPassword", _mockClipboardService);

        // Act
        sut.CopyToClipboardCommand.Execute(null);

        // Assert - need to wait for async handler
        // Give the async void handler time to complete
        await Task.Delay(100);
        await _mockClipboardService.Received(1).SetTextAsync("secretPassword");
    }

    [Fact]
    public void IsValueVisible_SetterRaisesPropertyChangedForIsValueVisible()
    {
        // Arrange
        var sut = new SecretItemViewModel("testKey", "testValue", _mockClipboardService);
        var propertyChangedRaised = false;
        sut.PropertyChanged += (s, e) =>
        {
            if (e.PropertyName == nameof(sut.IsValueVisible))
                propertyChangedRaised = true;
        };

        // Act
        sut.IsValueVisible = true;

        // Assert
        propertyChangedRaised.ShouldBeTrue();
    }

    [Fact]
    public void IsValueVisible_SetterRaisesPropertyChangedForDisplayValue()
    {
        // Arrange
        var sut = new SecretItemViewModel("testKey", "testValue", _mockClipboardService);
        var propertyChangedRaised = false;
        sut.PropertyChanged += (s, e) =>
        {
            if (e.PropertyName == nameof(sut.DisplayValue))
                propertyChangedRaised = true;
        };

        // Act
        sut.IsValueVisible = true;

        // Assert
        propertyChangedRaised.ShouldBeTrue();
    }

    [Fact]
    public void IsValueVisible_SetToSameValue_DoesNotRaisePropertyChanged()
    {
        // Arrange
        var sut = new SecretItemViewModel("testKey", "testValue", _mockClipboardService);
        sut.IsValueVisible = false; // Already false, but explicitly set
        var propertyChangedRaised = false;
        sut.PropertyChanged += (s, e) =>
        {
            propertyChangedRaised = true;
        };

        // Act
        sut.IsValueVisible = false;

        // Assert
        propertyChangedRaised.ShouldBeFalse();
    }
}