// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
 
using Aspire.Hosting.ApplicationModel;
using Aspire.Hosting.Eventing;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting;
using Microsoft.Extensions.Logging;
using SamplesIntegrationTests.Infrastructure;
using Xunit;
 
namespace SamplesIntegrationTests;
 
internal static class DistributedApplicationTestFactory
{
    /// <summary>
    /// Creates an <see cref="IDistributedApplicationTestingBuilder"/> for the specified app host assembly.
    /// </summary>
    public static async Task<IDistributedApplicationTestingBuilder> CreateAsync(Type appHostProgramType, ITestOutputHelper? testOutput)
    {
        var builder = await DistributedApplicationTestingBuilder.CreateAsync(appHostProgramType);
 
        // Custom hook needed because we want to only override the registry when
        // the original is from `docker.io`, but the options.ContainerRegistryOverride will
        // always override.
        builder.Services.AddHostedService<ContainerRegistryHook>();
 
        builder.WithRandomParameterValues();
        builder.WithRandomVolumeNames();
 
        builder.Services.AddLogging(logging =>
        {
            logging.ClearProviders();
            logging.AddSimpleConsole(configure =>
            {
                configure.SingleLine = true;
            });
            logging.AddFakeLogging();
            if (testOutput is not null)
            {
                logging.AddXunit(testOutput);
            }
            logging.SetMinimumLevel(LogLevel.Trace);
            logging.AddFilter("Aspire", LogLevel.Trace);
            logging.AddFilter(builder.Environment.ApplicationName, LogLevel.Trace);
        });
 
        return builder;
    }
 
    internal sealed class ContainerRegistryHook(DistributedApplicationEventing eventing) : IHostedService
    {
        public const string AspireTestContainerRegistry = "netaspireci.azurecr.io";
        public Task OnBeforeStartAsync(BeforeStartEvent @event, CancellationToken cancellationToken = default)
        {
            var resourcesWithContainerImages = @event.Model.Resources
                                                       .SelectMany(r => r.Annotations.OfType<ContainerImageAnnotation>()
                                                                                     .Select(cia => new { Resource = r, Annotation = cia }));
 
            foreach (var resourceWithContainerImage in resourcesWithContainerImages)
            {
                string? registry = resourceWithContainerImage.Annotation.Registry;
                if (registry is null || registry.Contains("docker.io"))
                {
                    resourceWithContainerImage.Annotation.Registry = AspireTestContainerRegistry;
                }
            }
 
            return Task.CompletedTask;
        }
 
        public Task StartAsync(CancellationToken cancellationToken)
        {
            eventing.Subscribe<BeforeStartEvent>(OnBeforeStartAsync);
            return Task.CompletedTask;
        }
 
        public Task StopAsync(CancellationToken cancellationToken)
        {
            return Task.CompletedTask;
        }
    }
 
}