// 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.Lifecycle;
using Microsoft.Extensions.Logging;
 
namespace Aspire.Hosting.Docker;
 
/// <summary>
/// Represents the infrastructure for Docker Compose within the Aspire Hosting environment.
/// Implements the <see cref="IDistributedApplicationLifecycleHook"/> interface to provide lifecycle hooks for distributed applications.
/// </summary>
internal sealed class DockerComposeInfrastructure(
    ILogger<DockerComposeInfrastructure> logger,
    DistributedApplicationExecutionContext executionContext) : IDistributedApplicationLifecycleHook
{
    public async Task BeforeStartAsync(DistributedApplicationModel appModel, CancellationToken cancellationToken = default)
    {
        if (executionContext.IsRunMode)
        {
            return;
        }
 
        // Find Docker Compose environment resources
        var dockerComposeEnvironments = appModel.Resources.OfType<DockerComposeEnvironmentResource>().ToArray();
 
        if (dockerComposeEnvironments.Length > 1)
        {
            throw new NotSupportedException("Multiple Docker Compose environments are not supported.");
        }
 
        var environment = dockerComposeEnvironments.FirstOrDefault();
 
        if (environment == null)
        {
            return;
        }
 
        var dockerComposeEnvironmentContext = new DockerComposeEnvironmentContext(environment, logger);
 
        foreach (var r in appModel.Resources)
        {
            if (r.TryGetLastAnnotation<ManifestPublishingCallbackAnnotation>(out var lastAnnotation) && lastAnnotation == ManifestPublishingCallbackAnnotation.Ignore)
            {
                continue;
            }
 
            // Skip resources that are not containers or projects
            if (!r.IsContainer() && r is not ProjectResource)
            {
                continue;
            }
 
            // Create a Docker Compose compute resource for the resource
            var serviceResource = await dockerComposeEnvironmentContext.CreateDockerComposeServiceResourceAsync(r, executionContext, cancellationToken).ConfigureAwait(false);
 
            // Add deployment target annotation to the resource
#pragma warning disable ASPIRECOMPUTE001 // Type is for evaluation purposes only and is subject to change or removal in future updates. Suppress this diagnostic to proceed.
            r.Annotations.Add(new DeploymentTargetAnnotation(serviceResource)
            {
                ComputeEnvironment = environment
            });
#pragma warning restore ASPIRECOMPUTE001 // Type is for evaluation purposes only and is subject to change or removal in future updates. Suppress this diagnostic to proceed.
        }
    }
}