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

namespace JdeScoping.SecureStoreManager.Tests.ViewModels;

public class MainWindowViewModelTests
{
    private readonly ISecureStoreManager _mockStoreManager;
    private readonly MainWindowViewModel _sut;

    public MainWindowViewModelTests()
    {
        _mockStoreManager = Substitute.For<ISecureStoreManager>();
        _sut = new MainWindowViewModel(_mockStoreManager);
    }

    [Fact]
    public void Constructor_InitializesEmptySecretsCollection()
    {
        _sut.Secrets.ShouldNotBeNull();
        _sut.Secrets.Count.ShouldBe(0);
    }

    [Fact]
    public void IsStoreOpen_DelegatesToStoreManager()
    {
        // Arrange
        _mockStoreManager.IsStoreOpen.Returns(true);

        // Act & Assert
        _sut.IsStoreOpen.ShouldBeTrue();
    }

    [Fact]
    public void HasUnsavedChanges_DelegatesToStoreManager()
    {
        // Arrange
        _mockStoreManager.HasUnsavedChanges.Returns(true);

        // Act & Assert
        _sut.HasUnsavedChanges.ShouldBeTrue();
    }

    [Fact]
    public void WindowTitle_WhenNoStoreOpen_ReturnsBasicTitle()
    {
        // Arrange
        _mockStoreManager.IsStoreOpen.Returns(false);

        // Act & Assert
        _sut.WindowTitle.ShouldBe("SecureStore Manager");
    }

    [Fact]
    public void WindowTitle_WhenStoreOpen_IncludesPath()
    {
        // Arrange
        _mockStoreManager.IsStoreOpen.Returns(true);
        _mockStoreManager.CurrentStorePath.Returns("/path/to/store.json");
        _mockStoreManager.HasUnsavedChanges.Returns(false);

        // Act & Assert
        _sut.WindowTitle.ShouldBe("SecureStore Manager - /path/to/store.json");
    }

    [Fact]
    public void WindowTitle_WhenUnsavedChanges_IncludesAsterisk()
    {
        // Arrange
        _mockStoreManager.IsStoreOpen.Returns(true);
        _mockStoreManager.CurrentStorePath.Returns("/path/to/store.json");
        _mockStoreManager.HasUnsavedChanges.Returns(true);

        // Act & Assert
        _sut.WindowTitle.ShouldBe("SecureStore Manager - /path/to/store.json *");
    }

    [Fact]
    public void StatusMessage_DefaultsToReady()
    {
        _sut.StatusMessage.ShouldBe("Ready");
    }

    [Fact]
    public async Task CreateNewStoreAsync_WithKeyFile_CallsStoreManagerCreateStore()
    {
        // Arrange
        var storePath = "/path/to/store.json";
        var keyPath = "/path/to/key.key";
        _mockStoreManager.GetKeys().Returns(new List<string>().AsReadOnly());

        // Act
        await _sut.CreateNewStoreAsync(storePath, keyPath, null);

        // Assert
        _mockStoreManager.Received(1).CreateStore(storePath, keyPath);
    }

    [Fact]
    public async Task CreateNewStoreAsync_WithPassword_CallsStoreManagerCreateStoreWithPassword()
    {
        // Arrange
        var storePath = "/path/to/store.json";
        var password = "password123";
        _mockStoreManager.GetKeys().Returns(new List<string>().AsReadOnly());

        // Act
        await _sut.CreateNewStoreAsync(storePath, null, password);

        // Assert
        _mockStoreManager.Received(1).CreateStoreWithPassword(storePath, password);
    }

    [Fact]
    public async Task OpenExistingStoreAsync_WithKeyFile_CallsStoreManagerOpenStore()
    {
        // Arrange
        var storePath = "/path/to/store.json";
        var keyPath = "/path/to/key.key";
        _mockStoreManager.GetKeys().Returns(new List<string>().AsReadOnly());

        // Act
        await _sut.OpenExistingStoreAsync(storePath, keyPath, null);

        // Assert
        _mockStoreManager.Received(1).OpenStore(storePath, keyPath);
    }

    [Fact]
    public async Task OpenExistingStoreAsync_WithPassword_CallsStoreManagerOpenStoreWithPassword()
    {
        // Arrange
        var storePath = "/path/to/store.json";
        var password = "password123";
        _mockStoreManager.GetKeys().Returns(new List<string>().AsReadOnly());

        // Act
        await _sut.OpenExistingStoreAsync(storePath, null, password);

        // Assert
        _mockStoreManager.Received(1).OpenStoreWithPassword(storePath, password);
    }

    [Fact]
    public async Task SaveSecretAsync_CallsStoreManagerSetSecret()
    {
        // Arrange
        _mockStoreManager.IsStoreOpen.Returns(true);
        _mockStoreManager.GetKeys().Returns(new List<string> { "testKey" }.AsReadOnly());
        _mockStoreManager.GetSecret("testKey").Returns("testValue");

        // Act
        await _sut.SaveSecretAsync("testKey", "testValue", isNew: true);

        // Assert
        _mockStoreManager.Received(1).SetSecret("testKey", "testValue");
    }

    [Fact]
    public async Task SaveSecretAsync_RefreshesSecretsCollection()
    {
        // Arrange
        _mockStoreManager.IsStoreOpen.Returns(true);
        _mockStoreManager.GetKeys().Returns(new List<string> { "key1", "key2" }.AsReadOnly());
        _mockStoreManager.GetSecret("key1").Returns("value1");
        _mockStoreManager.GetSecret("key2").Returns("value2");

        // Act
        await _sut.SaveSecretAsync("key1", "value1", isNew: true);

        // Assert
        _sut.Secrets.Count.ShouldBe(2);
    }

    [Fact]
    public async Task PromptForUnsavedChangesAsync_WhenNoChanges_ReturnsTrue()
    {
        // Arrange
        _mockStoreManager.HasUnsavedChanges.Returns(false);

        // Act
        var result = await _sut.PromptForUnsavedChangesAsync();

        // Assert
        result.ShouldBeTrue();
    }

    [Fact]
    public void SaveCommand_CanExecute_WhenStoreOpenWithChanges()
    {
        // Arrange
        _mockStoreManager.IsStoreOpen.Returns(true);
        _mockStoreManager.HasUnsavedChanges.Returns(true);

        // Act
        var canExecute = _sut.SaveCommand.CanExecute(null);

        // Assert
        canExecute.ShouldBeTrue();
    }

    [Fact]
    public void SaveCommand_CannotExecute_WhenNoChanges()
    {
        // Arrange
        _mockStoreManager.IsStoreOpen.Returns(true);
        _mockStoreManager.HasUnsavedChanges.Returns(false);

        // Act
        var canExecute = _sut.SaveCommand.CanExecute(null);

        // Assert
        canExecute.ShouldBeFalse();
    }

    [Fact]
    public void AddSecretCommand_CanExecute_WhenStoreOpen()
    {
        // Arrange
        _mockStoreManager.IsStoreOpen.Returns(true);

        // Act
        var canExecute = _sut.AddSecretCommand.CanExecute(null);

        // Assert
        canExecute.ShouldBeTrue();
    }

    [Fact]
    public void AddSecretCommand_CannotExecute_WhenStoreNotOpen()
    {
        // Arrange
        _mockStoreManager.IsStoreOpen.Returns(false);

        // Act
        var canExecute = _sut.AddSecretCommand.CanExecute(null);

        // Assert
        canExecute.ShouldBeFalse();
    }

    [Fact]
    public void CloseStoreCommand_CanExecute_WhenStoreOpen()
    {
        // Arrange
        _mockStoreManager.IsStoreOpen.Returns(true);

        // Act
        var canExecute = _sut.CloseStoreCommand.CanExecute(null);

        // Assert
        canExecute.ShouldBeTrue();
    }

    [Fact]
    public void CloseStoreCommand_CannotExecute_WhenStoreNotOpen()
    {
        // Arrange
        _mockStoreManager.IsStoreOpen.Returns(false);

        // Act
        var canExecute = _sut.CloseStoreCommand.CanExecute(null);

        // Assert
        canExecute.ShouldBeFalse();
    }

    [Fact]
    public void SelectedSecret_SetRaisesPropertyChanged()
    {
        // Arrange
        var propertyChangedRaised = false;
        _sut.PropertyChanged += (s, e) =>
        {
            if (e.PropertyName == nameof(_sut.SelectedSecret))
                propertyChangedRaised = true;
        };

        // Act
        _sut.SelectedSecret = new SecretItemViewModel("key", "value");

        // Assert
        propertyChangedRaised.ShouldBeTrue();
    }
}