// 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.Net.Http.Headers;
using System.Reflection;
using Microsoft.AspNetCore.Testing;

namespace Microsoft.AspNetCore.Mvc.FunctionalTests;

public class LinkGenerationTests : IClassFixture<MvcTestFixture<BasicWebSite.StartupWithoutEndpointRouting>>
{
    // Some tests require comparing the actual response body against an expected response baseline
    // so they require a reference to the assembly on which the resources are located, in order to
    // make the tests less verbose, we get a reference to the assembly with the resources and we
    // use it on all the rest of the tests.
    private static readonly Assembly _resourcesAssembly = typeof(LinkGenerationTests).GetTypeInfo().Assembly;

    public LinkGenerationTests(MvcTestFixture<BasicWebSite.StartupWithoutEndpointRouting> fixture)
    {
        Client = fixture.CreateDefaultClient();
    }

    public HttpClient Client { get; }

    public static TheoryData<string, string> RelativeLinksData
    {
        get
        {
            return new TheoryData<string, string>
                {
                    { "http://localhost/Home/RedirectToActionReturningTaskAction", "/Home/ActionReturningTask" },
                    { "http://localhost/Home/RedirectToRouteActionAsMethodAction", "/Home/ActionReturningTask" },
                    { "http://localhost/Home/RedirectToRouteUsingRouteName", "/api/orders/10" },
                    { "http://pingüino/Home/RedirectToRouteUsingRouteName", "/api/orders/10" },
                };
        }
    }

    [Theory]
    [MemberData(nameof(RelativeLinksData))]
    public async Task GeneratedLinksWithActionResults_AreRelativeLinks_WhenSetOnLocationHeader(
        string url,
        string expected)
    {
        // Act
        var response = await Client.GetAsync(url);
        var responseContent = await response.Content.ReadAsStringAsync();

        // Assert
        Assert.Equal(HttpStatusCode.Redirect, response.StatusCode);
        // Location.ToString() in mono returns file://url. (https://github.com/aspnet/External/issues/21)
        Assert.Equal(
            TestPlatformHelper.IsMono ? new Uri(expected) : new Uri(expected, UriKind.Relative),
            response.Headers.Location);
    }

    [Fact]
    public async Task GeneratedLinks_AreNotPunyEncoded_WhenGeneratedOnViews()
    {
        // Arrange
        var expectedMediaType = MediaTypeHeaderValue.Parse("text/html; charset=utf-8");
        var outputFile = "compiler/resources/BasicWebSite.Home.ActionLinkView.html";
        var expectedContent =
            await ResourceFile.ReadResourceAsync(_resourcesAssembly, outputFile, sourceFile: false);

        // Act
        // The host is not important as everything runs in memory and tests are isolated from each other.
        var response = await Client.GetAsync("http://localhost/Home/ActionLinkView");
        var responseContent = await response.Content.ReadAsStringAsync();

        // Assert
        Assert.Equal(HttpStatusCode.OK, response.StatusCode);
        Assert.Equal(expectedMediaType, response.Content.Headers.ContentType);

        ResourceFile.UpdateOrVerify(_resourcesAssembly, outputFile, expectedContent, responseContent);
    }
}
