// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
 
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Diagnostics.HealthChecks;
using Microsoft.Extensions.Hosting;
 
namespace Aspire;
 
internal static class HealthChecksExtensions
{
    /// <summary>
    /// Adds a HealthCheckRegistration if one hasn't already been added to the builder.
    /// </summary>
    public static void TryAddHealthCheck(this IHostApplicationBuilder builder, HealthCheckRegistration healthCheckRegistration)
    {
        builder.TryAddHealthCheck(healthCheckRegistration.Name, hcBuilder => hcBuilder.Add(healthCheckRegistration));
    }
 
    /// <summary>
    /// Invokes the <paramref name="addHealthCheck"/> action if the given <paramref name="name"/> hasn't already been added to the builder.
    /// </summary>
    public static void TryAddHealthCheck(this IHostApplicationBuilder builder, string name, Action<IHealthChecksBuilder> addHealthCheck)
    {
        var healthCheckKey = $"Aspire.HealthChecks.{name}";
        if (!builder.Properties.ContainsKey(healthCheckKey))
        {
            builder.Properties[healthCheckKey] = true;
            addHealthCheck(builder.Services.AddHealthChecks());
        }
    }
}