// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.

using System.Diagnostics.CodeAnalysis;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.DependencyInjection.Extensions;
using Microsoft.Extensions.Options;

namespace Microsoft.Extensions.Logging.Configuration
{
    /// <summary>
    /// Provides a set of helpers to initialize options objects from logger provider configuration.
    /// </summary>
    public static class LoggerProviderOptions
    {
        internal const string RequiresDynamicCodeMessage = "Binding TOptions to configuration values may require generating dynamic code at runtime.";
        internal const string TrimmingRequiresUnreferencedCodeMessage = "TOptions's dependent types may have their members trimmed. Ensure all required members are preserved.";

        /// <summary>
        /// Indicates that settings for <typeparamref name="TProvider"/> should be loaded into <typeparamref name="TOptions"/> type.
        /// </summary>
        /// <param name="services">The <see cref="IServiceCollection"/> to register on.</param>
        /// <typeparam name="TOptions">The options class.</typeparam>
        /// <typeparam name="TProvider">The provider class.</typeparam>
        [RequiresDynamicCode(RequiresDynamicCodeMessage)]
        [RequiresUnreferencedCode(TrimmingRequiresUnreferencedCodeMessage)]
        public static void RegisterProviderOptions<TOptions, TProvider>(IServiceCollection services) where TOptions : class
        {
            services.TryAddEnumerable(ServiceDescriptor.Singleton<IConfigureOptions<TOptions>, LoggerProviderConfigureOptions<TOptions, TProvider>>());
            services.TryAddEnumerable(ServiceDescriptor.Singleton<IOptionsChangeTokenSource<TOptions>, LoggerProviderOptionsChangeTokenSource<TOptions, TProvider>>());
        }
    }
}