// Copyright (c) .NET Foundation. All rights reserved.
// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.

using System;
using System.Net.Http;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Mvc.ModelBinding;
using Microsoft.AspNetCore.Mvc.ModelBinding.Validation;
using Xunit;

namespace Microsoft.AspNetCore.Mvc.WebApiCompatShim
{
    public class HttpRequestMessageModelBinderTest
    {
        [Fact]
        public async Task BindModelAsync_BindsHttpRequestMessage()
        {
            // Arrange
            var binder = new HttpRequestMessageModelBinder();
            var bindingContext = GetBindingContext(typeof(HttpRequestMessage));
            var expectedModel = bindingContext.HttpContext.GetHttpRequestMessage();

            // Act
            await binder.BindModelAsync(bindingContext);

            // Assert
            var result = bindingContext.Result;
            Assert.True(result.IsModelSet);
            Assert.Same(expectedModel, result.Model);

            var entry = bindingContext.ValidationState[result.Model];
            Assert.True(entry.SuppressValidation);
            Assert.Null(entry.Key);
            Assert.Null(entry.Metadata);
        }

        private static DefaultModelBindingContext GetBindingContext(Type modelType)
        {
            var metadataProvider = new EmptyModelMetadataProvider();
            DefaultModelBindingContext bindingContext = new DefaultModelBindingContext
            {
                ActionContext = new ActionContext()
                {
                    HttpContext = new DefaultHttpContext(),
                },
                ModelMetadata = metadataProvider.GetMetadataForType(modelType),
                ModelName = "someName",
                ValidationState = new ValidationStateDictionary(),
            };

            bindingContext.HttpContext.Request.Method = "GET";

            return bindingContext;
        }
    }
}