// Copyright (c) Umbraco.
// See LICENSE for more details.

using Microsoft.Extensions.Logging;
using Moq;
using NUnit.Framework;
using Umbraco.Cms.Core.Events;
using Umbraco.Cms.Core.Models;
using Umbraco.Cms.Core.Persistence.Repositories;
using Umbraco.Cms.Core.Scoping;
using Umbraco.Cms.Core.Services;

namespace Umbraco.Cms.Tests.UnitTests.Umbraco.Infrastructure.Services;

/// <summary>
/// Unit tests for ContentServiceBase (shared infrastructure for extracted services).
/// These tests establish the expected contract for the base class before it's created.
/// </summary>
/// <remarks>
/// ContentServiceBase will be created in Phase 1. These tests validate the design requirements:
/// - Audit helper method behavior
/// - Scope provider access patterns
/// - Logger injection patterns
/// </remarks>
[TestFixture]
public class ContentServiceBaseTests
{
    // Note: These tests will be uncommented when ContentServiceBase is created in Phase 1.
    // For now, they serve as documentation of the expected behavior.

    /*
    private Mock<ICoreScopeProvider> _scopeProviderMock;
    private Mock<IAuditService> _auditServiceMock;
    private Mock<IEventMessagesFactory> _eventMessagesFactoryMock;
    private Mock<ILogger<TestContentService>> _loggerMock;
    private TestContentService _service;

    [SetUp]
    public void Setup()
    {
        _scopeProviderMock = new Mock<ICoreScopeProvider>();
        _auditServiceMock = new Mock<IAuditService>();
        _eventMessagesFactoryMock = new Mock<IEventMessagesFactory>();
        _loggerMock = new Mock<ILogger<TestContentService>>();

        _eventMessagesFactoryMock.Setup(x => x.Get()).Returns(new EventMessages());

        _service = new TestContentService(
            _scopeProviderMock.Object,
            _auditServiceMock.Object,
            _eventMessagesFactoryMock.Object,
            _loggerMock.Object);
    }

    #region Audit Helper Method Tests

    [Test]
    public void Audit_WithValidParameters_CreatesAuditEntry()
    {
        // Arrange
        var userId = 1;
        var objectId = 100;
        var message = "Test audit message";

        // Act
        _service.TestAudit(AuditType.Save, userId, objectId, message);

        // Assert
        _auditServiceMock.Verify(x => x.Write(
            userId,
            message,
            It.IsAny<string>(),
            objectId), Times.Once);
    }

    [Test]
    public void Audit_WithNullMessage_UsesDefaultMessage()
    {
        // Arrange
        var userId = 1;
        var objectId = 100;

        // Act
        _service.TestAudit(AuditType.Save, userId, objectId, null);

        // Assert
        _auditServiceMock.Verify(x => x.Write(
            userId,
            It.Is<string>(s => !string.IsNullOrEmpty(s)),
            It.IsAny<string>(),
            objectId), Times.Once);
    }

    #endregion

    #region Scope Provider Access Pattern Tests

    [Test]
    public void CreateScope_ReturnsValidCoreScope()
    {
        // Arrange
        var scopeMock = new Mock<ICoreScope>();
        _scopeProviderMock.Setup(x => x.CreateCoreScope(
            It.IsAny<IsolationLevel>(),
            It.IsAny<RepositoryCacheMode>(),
            It.IsAny<IEventDispatcher>(),
            It.IsAny<IScopedNotificationPublisher>(),
            It.IsAny<bool>(),
            It.IsAny<bool>(),
            It.IsAny<bool>()))
            .Returns(scopeMock.Object);

        // Act
        var scope = _service.TestCreateScope();

        // Assert
        Assert.That(scope, Is.Not.Null);
        _scopeProviderMock.Verify(x => x.CreateCoreScope(
            It.IsAny<IsolationLevel>(),
            It.IsAny<RepositoryCacheMode>(),
            It.IsAny<IEventDispatcher>(),
            It.IsAny<IScopedNotificationPublisher>(),
            It.IsAny<bool>(),
            It.IsAny<bool>(),
            It.IsAny<bool>()), Times.Once);
    }

    [Test]
    public void CreateScope_WithAmbientScope_ReusesExisting()
    {
        // Arrange
        var ambientScopeMock = new Mock<ICoreScope>();
        _scopeProviderMock.SetupGet(x => x.AmbientScope).Returns(ambientScopeMock.Object);

        // When ambient scope exists, CreateCoreScope should still be called
        // but the scope provider handles the nesting
        _scopeProviderMock.Setup(x => x.CreateCoreScope(
            It.IsAny<IsolationLevel>(),
            It.IsAny<RepositoryCacheMode>(),
            It.IsAny<IEventDispatcher>(),
            It.IsAny<IScopedNotificationPublisher>(),
            It.IsAny<bool>(),
            It.IsAny<bool>(),
            It.IsAny<bool>()))
            .Returns(ambientScopeMock.Object);

        // Act
        var scope = _service.TestCreateScope();

        // Assert - scope should be the ambient scope (or nested in it)
        Assert.That(scope, Is.Not.Null);
    }

    #endregion

    #region Logger Injection Tests

    [Test]
    public void Logger_IsInjectedCorrectly()
    {
        // Assert
        Assert.That(_service.TestLogger, Is.Not.Null);
        Assert.That(_service.TestLogger, Is.EqualTo(_loggerMock.Object));
    }

    [Test]
    public void Logger_UsesCorrectCategoryName()
    {
        // The logger should be typed to the concrete service class
        // This is verified by the generic type parameter
        Assert.That(_service.TestLogger, Is.InstanceOf<ILogger<TestContentService>>());
    }

    #endregion

    #region Repository Access Tests

    [Test]
    public void DocumentRepository_IsAccessibleWithinScope()
    {
        // This test validates that the base class provides access to the document repository
        // The actual repository access pattern will be tested in integration tests
        Assert.Pass("Repository access validated in integration tests");
    }

    #endregion

    /// <summary>
    /// Test implementation of ContentServiceBase for unit testing.
    /// </summary>
    private class TestContentService : ContentServiceBase
    {
        public TestContentService(
            ICoreScopeProvider scopeProvider,
            IAuditService auditService,
            IEventMessagesFactory eventMessagesFactory,
            ILogger<TestContentService> logger)
            : base(scopeProvider, auditService, eventMessagesFactory, logger)
        {
        }

        // Expose protected members for testing
        public void TestAudit(AuditType type, int userId, int objectId, string? message)
            => Audit(type, userId, objectId, message);

        public ICoreScope TestCreateScope() => ScopeProvider.CreateCoreScope();

        public ILogger<TestContentService> TestLogger => Logger;
    }
    */

    /// <summary>
    /// v1.3: Tracking test that fails when ContentServiceBase is created.
    /// When this test fails, uncomment all tests in this file and delete this placeholder.
    /// </summary>
    [Test]
    public void ContentServiceBase_WhenCreated_UncommentTests()
    {
        // This tracking test uses reflection to detect when ContentServiceBase is created.
        // When you see this test fail, it means Phase 1 has created ContentServiceBase.
        // At that point:
        // 1. Uncomment all the tests in this file (the commented section above)
        // 2. Delete this tracking test
        // 3. Verify all tests pass

        var type = Type.GetType("Umbraco.Cms.Core.Services.ContentServiceBase, Umbraco.Core");

        Assert.That(type, Is.Null,
            "ContentServiceBase now exists! Uncomment all tests in this file and delete this tracking test.");
    }
}