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

using System.Threading.Tasks;
using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Mvc;
using Microsoft.AspNetCore.Mvc.Abstractions;
using Microsoft.AspNetCore.Mvc.ModelBinding;
using Microsoft.AspNetCore.Routing;
using Moq;
using NUnit.Framework;
using Umbraco.Cms.Core.Events;
using Umbraco.Cms.Core.Models;
using Umbraco.Cms.Core.Models.PublishedContent;
using Umbraco.Cms.Core.Routing;
using Umbraco.Cms.Core.Services;
using Umbraco.Cms.Web.Common.ModelBinders;
using Umbraco.Cms.Web.Common.Routing;

namespace Umbraco.Cms.Tests.UnitTests.Umbraco.Web.Common.ModelBinders;

[TestFixture]
public class ContentModelBinderTests
{
    [SetUp]
    public void SetUp() => _contentModelBinder = new ContentModelBinder(Mock.Of<IEventAggregator>());

    private ContentModelBinder _contentModelBinder;

    [Test]
    [TestCase(typeof(IPublishedContent), false)]
    [TestCase(typeof(ContentModel), false)]
    [TestCase(typeof(ContentType1), false)]
    [TestCase(typeof(ContentModel<ContentType1>), false)]
    [TestCase(typeof(NonContentModel), true)]
    [TestCase(typeof(MyCustomContentModel), true)]
    [TestCase(typeof(IContentModel), true)]
    public void Returns_Binder_For_IPublishedContent_And_IRenderModel(Type testType, bool expectNull)
    {
        var binderProvider = new ContentModelBinderProvider();
        var contextMock = new Mock<ModelBinderProviderContext>();
        contextMock.Setup(x => x.Metadata).Returns(new EmptyModelMetadataProvider().GetMetadataForType(testType));

        var found = binderProvider.GetBinder(contextMock.Object);
        if (expectNull)
        {
            Assert.IsNull(found);
        }
        else
        {
            Assert.IsNotNull(found);
        }
    }

    [Test]
    public async Task Does_Not_Bind_Model_When_UmbracoToken_Not_In_Route_Values()
    {
        // Arrange
        var pc = CreatePublishedContent();
        var bindingContext = CreateBindingContextForUmbracoRequest(typeof(ContentModel), pc);
        bindingContext.ActionContext.HttpContext.Features.Set<UmbracoRouteValues>(null);

        // Act
        await _contentModelBinder.BindModelAsync(bindingContext);

        // Assert
        Assert.False(bindingContext.Result.IsModelSet);
    }

    [Test]
    public async Task Bind_Model_When_UmbracoToken_Is_In_Route_Values()
    {
        // Arrange
        var pc = CreatePublishedContent();
        var bindingContext = CreateBindingContextForUmbracoRequest(typeof(ContentModel), pc);

        // Act
        await _contentModelBinder.BindModelAsync(bindingContext);

        // Assert
        Assert.True(bindingContext.Result.IsModelSet);
    }

    [Test]
    public void Throws_When_Source_Not_Of_Expected_Type()
    {
        // Arrange
        var bindingContext = new DefaultModelBindingContext();

        // Act/Assert
        Assert.Throws<ModelBindingException>(() =>
            _contentModelBinder.BindModel(bindingContext, new NonContentModel(), typeof(ContentModel)));
    }

    [Test]
    public void Binds_From_IPublishedContent_To_Content_Model()
    {
        // Arrange
        var pc = CreatePublishedContent();
        ModelBindingContext bindingContext = new DefaultModelBindingContext();

        // Act
        _contentModelBinder.BindModel(bindingContext, pc, typeof(ContentModel));

        // Assert
        Assert.True(bindingContext.Result.IsModelSet);
    }

    [Test]
    public void Binds_From_IPublishedContent_To_Content_Model_Of_T()
    {
        // Arrange
        var pc = CreatePublishedContent();
        ModelBindingContext bindingContext = new DefaultModelBindingContext();

        // Act
        _contentModelBinder.BindModel(
            bindingContext,
            new ContentModel<ContentType2>(new ContentType2(pc, Mock.Of<IPublishedValueFallback>())),
            typeof(ContentModel<ContentType1>));

        // Assert
        Assert.True(bindingContext.Result.IsModelSet);
    }

    [Test]
    public void BindModel_Null_Source_Returns_Null()
    {
        var bindingContext = new DefaultModelBindingContext();
        _contentModelBinder.BindModel(bindingContext, null, typeof(ContentType1));
        Assert.IsNull(bindingContext.Result.Model);
    }

    [Test]
    public void BindModel_Returns_If_Same_Type()
    {
        var content = new ContentType1(Mock.Of<IPublishedContent>(), Mock.Of<IPublishedValueFallback>());
        var bindingContext = new DefaultModelBindingContext();

        _contentModelBinder.BindModel(bindingContext, content, typeof(ContentType1));

        Assert.AreSame(content, bindingContext.Result.Model);
    }

    [Test]
    public void BindModel_RenderModel_To_IPublishedContent()
    {
        var content = new ContentType1(Mock.Of<IPublishedContent>(), Mock.Of<IPublishedValueFallback>());
        var renderModel = new ContentModel(content);

        var bindingContext = new DefaultModelBindingContext();
        _contentModelBinder.BindModel(bindingContext, renderModel, typeof(IPublishedContent));

        Assert.AreSame(content, bindingContext.Result.Model);
    }

    [Test]
    public void BindModel_IPublishedContent_To_RenderModel()
    {
        var content = new ContentType1(Mock.Of<IPublishedContent>(), Mock.Of<IPublishedValueFallback>());
        var bindingContext = new DefaultModelBindingContext();

        _contentModelBinder.BindModel(bindingContext, content, typeof(ContentModel));
        var bound = (IContentModel)bindingContext.Result.Model;

        Assert.AreSame(content, bound.Content);
    }

    [Test]
    public void BindModel_IPublishedContent_To_Generic_RenderModel()
    {
        var content = new ContentType1(Mock.Of<IPublishedContent>(), Mock.Of<IPublishedValueFallback>());
        var bindingContext = new DefaultModelBindingContext();

        _contentModelBinder.BindModel(bindingContext, content, typeof(ContentModel<ContentType1>));
        var bound = (IContentModel)bindingContext.Result.Model;

        Assert.AreSame(content, bound.Content);
    }

    [Test]
    public void Null_Model_Binds_To_Null()
    {
        var bindingContext = new DefaultModelBindingContext();
        _contentModelBinder.BindModel(bindingContext, null, typeof(ContentModel));
        Assert.IsNull(bindingContext.Result.Model);
    }

    [Test]
    public void Invalid_Model_Type_Throws_Exception()
    {
        var bindingContext = new DefaultModelBindingContext();
        Assert.Throws<ModelBindingException>(() =>
            _contentModelBinder.BindModel(bindingContext, "Hello", typeof(IPublishedContent)));
    }

    /// <summary>
    ///     Creates a binding context with the route values populated to similute an Umbraco dynamically routed request
    /// </summary>
    private ModelBindingContext CreateBindingContextForUmbracoRequest(
        Type modelType,
        IPublishedContent publishedContent)
    {
        var builder = new PublishedRequestBuilder(new Uri("https://example.com"), Mock.Of<IFileService>());
        builder.SetPublishedContent(publishedContent);
        var publishedRequest = builder.Build();

        var httpContext = new DefaultHttpContext();
        var routeData = new RouteData();
        httpContext.Features.Set(new UmbracoRouteValues(publishedRequest, null));

        var actionContext = new ActionContext(httpContext, routeData, new ActionDescriptor());
        var metadataProvider = new EmptyModelMetadataProvider();
        var routeValueDictionary = new RouteValueDictionary();
        var valueProvider = new RouteValueProvider(BindingSource.Path, routeValueDictionary);
        return new DefaultModelBindingContext
        {
            ActionContext = actionContext,
            ModelMetadata = metadataProvider.GetMetadataForType(modelType),
            ModelName = modelType.Name,
            ValueProvider = valueProvider,
        };
    }

    private class NonContentModel
    {
    }

    private IPublishedContent CreatePublishedContent() =>
        new ContentType2(new Mock<IPublishedContent>().Object, Mock.Of<IPublishedValueFallback>());

    public class ContentType1 : PublishedContentWrapped
    {
        public ContentType1(IPublishedContent content, IPublishedValueFallback fallback)
            : base(content, fallback)
        {
        }
    }

    public class ContentType2 : ContentType1
    {
        public ContentType2(IPublishedContent content, IPublishedValueFallback fallback)
            : base(content, fallback)
        {
        }
    }

    public class MyCustomContentModel : ContentModel
    {
        public MyCustomContentModel(IPublishedContent content)
            : base(content)
        {
        }
    }
}