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

using System;
using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Mvc;
using Microsoft.AspNetCore.Mvc.Abstractions;
using Microsoft.AspNetCore.Mvc.ModelBinding;
using Microsoft.AspNetCore.Routing;
using Microsoft.Extensions.Primitives;
using NUnit.Framework;
using Umbraco.Cms.Web.Common.ModelBinders;

namespace Umbraco.Cms.Tests.UnitTests.Umbraco.Web.Common.ModelBinders
{
    [TestFixture]
    public class HttpQueryStringModelBinderTests
    {
        [Test]
        public void Binds_Query_To_FormCollection()
        {
            // Arrange
            ModelBindingContext bindingContext = CreateBindingContext("?foo=bar&baz=buzz");
            var binder = new HttpQueryStringModelBinder();

            // Act
            binder.BindModelAsync(bindingContext);

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

            var typedModel = bindingContext.Result.Model as FormCollection;
            Assert.IsNotNull(typedModel);
            Assert.AreEqual(typedModel["foo"], "bar");
            Assert.AreEqual(typedModel["baz"], "buzz");
        }

        [Test]
        public void Sets_Culture_Form_Value_From_Query_If_Provided()
        {
            // Arrange
            ModelBindingContext bindingContext = CreateBindingContext("?foo=bar&baz=buzz&culture=en-gb");
            var binder = new HttpQueryStringModelBinder();

            // Act
            binder.BindModelAsync(bindingContext);

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

            var typedModel = bindingContext.Result.Model as FormCollection;
            Assert.IsNotNull(typedModel);
            Assert.AreEqual(typedModel["culture"], "en-gb");
        }

        [Test]
        public void Sets_Culture_Form_Value_From_Header_If_Not_Provided_In_Query()
        {
            // Arrange
            ModelBindingContext bindingContext = CreateBindingContext("?foo=bar&baz=buzz");
            var binder = new HttpQueryStringModelBinder();

            // Act
            binder.BindModelAsync(bindingContext);

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

            var typedModel = bindingContext.Result.Model as FormCollection;
            Assert.IsNotNull(typedModel);
            Assert.AreEqual(typedModel["culture"], "en-gb");
        }

        private ModelBindingContext CreateBindingContext(string querystring)
        {
            var httpContext = new DefaultHttpContext();
            httpContext.Request.QueryString = new QueryString(querystring);
            httpContext.Request.Headers.Add("X-UMB-CULTURE", new StringValues("en-gb"));
            var routeData = new RouteData();
            var actionContext = new ActionContext(httpContext, routeData, new ActionDescriptor());
            var metadataProvider = new EmptyModelMetadataProvider();
            var routeValueDictionary = new RouteValueDictionary();
            var valueProvider = new RouteValueProvider(BindingSource.Path, routeValueDictionary);
            Type modelType = typeof(FormCollection);
            return new DefaultModelBindingContext
            {
                ActionContext = actionContext,
                ModelMetadata = metadataProvider.GetMetadataForType(modelType),
                ModelName = modelType.Name,
                ValueProvider = valueProvider,
            };
        }
    }
}