// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
 
using System.Net;
using System.Net.Http;
using System.Reflection;
using System.Text.Json;
using System.Xml.Linq;
using FormatterWebSite;
using Microsoft.AspNetCore.InternalTesting;
using Xunit.Abstractions;
 
namespace Microsoft.AspNetCore.Mvc.FunctionalTests;
 
public class AsyncEnumerableTestBase : LoggedTest
{
    protected override void Initialize(TestContext context, MethodInfo methodInfo, object[] testMethodArguments, ITestOutputHelper testOutputHelper)
    {
        base.Initialize(context, methodInfo, testMethodArguments, testOutputHelper);
        Factory = new MvcTestFixture<StartupWithJsonFormatter>(LoggerFactory);
        Client = Factory.CreateDefaultClient();
    }
 
    public override void Dispose()
    {
        Factory.Dispose();
        base.Dispose();
    }
 
    public MvcTestFixture<StartupWithJsonFormatter> Factory { get; private set; }
    public HttpClient Client { get; private set; }
 
    [Fact]
    public Task AsyncEnumerableReturnedWorks() => AsyncEnumerableWorks("getallprojects");
 
    [Fact]
    public Task AsyncEnumerableWrappedInTask() => AsyncEnumerableWorks("getallprojectsastask");
 
    private async Task AsyncEnumerableWorks(string action)
    {
        // Act
        var response = await Client.GetAsync($"asyncenumerable/{action}");
 
        // Assert
        await response.AssertStatusCodeAsync(HttpStatusCode.OK);
 
        var content = await response.Content.ReadAsStringAsync();
 
        // Some sanity tests to verify things serialized correctly.
        var projects = JsonSerializer.Deserialize<List<Project>>(content, TestJsonSerializerOptionsProvider.Options);
        Assert.Equal(10, projects.Count);
        Assert.Equal("Project0", projects[0].Name);
        Assert.Equal("Project9", projects[9].Name);
    }
 
    [Fact]
    public async Task AsyncEnumerableExceptionsAreThrown()
    {
        // Act
        var response = await Client.GetAsync("asyncenumerable/GetAllProjectsWithError");
 
        // Assert
        await response.AssertStatusCodeAsync(HttpStatusCode.InternalServerError);
 
        var content = await response.Content.ReadAsStringAsync();
 
        // Verify that the exception shows up in the callstack
        Assert.Contains(nameof(InvalidTimeZoneException), content);
    }
 
    [Fact]
    public async Task AsyncEnumerableWithXmlFormatterWorks()
    {
        // Arrange
        var request = new HttpRequestMessage(HttpMethod.Get, "asyncenumerable/getallprojects");
        request.Headers.Add("Accept", "application/xml");
 
        // Act
        var response = await Client.SendAsync(request);
 
        // Assert
        await response.AssertStatusCodeAsync(HttpStatusCode.OK);
 
        var content = await response.Content.ReadAsStringAsync();
 
        // Some sanity tests to verify things serialized correctly.
        var xml = XDocument.Parse(content);
        var @namespace = xml.Root.Name.NamespaceName;
        var projects = xml.Root.Elements(XName.Get("Project", @namespace));
        Assert.Equal(10, projects.Count());
 
        Assert.Equal("Project0", GetName(projects.ElementAt(0)));
        Assert.Equal("Project9", GetName(projects.ElementAt(9)));
 
        string GetName(XElement element)
        {
            var name = element.Element(XName.Get("Name", @namespace));
            Assert.NotNull(name);
 
            return name.Value;
        }
    }
}