using DigitalData.Core.Abstractions.Security;
using DigitalData.Core.Security.Config;
using DigitalData.Core.Security.Cryptographer;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.DependencyInjection.Extensions;
using Microsoft.Extensions.Options;
using System.Text.Json;
using System.Text.Json.Serialization;

namespace DigitalData.Core.Security
{
    public static class DIExtensions
    {
        public static JsonSerializerOptions AddCryptographerConverter(this JsonSerializerOptions options)
        {
            if (!options.Converters.OfType<HashAlgorithmNameConverter>().Any())
                options.Converters.Add(new HashAlgorithmNameConverter());

            if (!options.Converters.OfType<JsonStringEnumConverter>().Any())
                options.Converters.Add(new JsonStringEnumConverter());
            return options;
        }

        private static IServiceCollection AddAsymCryptService<TAsymCryptParams>(this IServiceCollection services)
            where TAsymCryptParams : AsymCryptParams
        {
            services.TryAddScoped<IAsymCryptService<TAsymCryptParams>, AsymCryptService<TAsymCryptParams>>();
            return services;
        }

        public static IServiceCollection AddAsymCryptService<TAsymCryptParams>(this IServiceCollection services, IConfigurationSection section) 
            where TAsymCryptParams : AsymCryptParams
                => services.Configure<TAsymCryptParams>(section).AddAsymCryptService<TAsymCryptParams>();

        public static IServiceCollection AddAsymCryptService<TAsymCryptParams>(this IServiceCollection services, TAsymCryptParams param)
            where TAsymCryptParams : AsymCryptParams
                => services.AddSingleton(Options.Create(param)).AddAsymCryptService<TAsymCryptParams>();

        private static IServiceCollection AddRSAFactory<TRSAFactoryParams>(this IServiceCollection services)
            where TRSAFactoryParams : RSAFactoryParams
        {
            services.TryAddScoped<IRSAFactory<TRSAFactoryParams>, RSAFactory<TRSAFactoryParams>>();
            return services;
        }

        public static IServiceCollection AddRSAFactory<TRSAFactoryParams>(this IServiceCollection services, IConfigurationSection section)
            where TRSAFactoryParams : RSAFactoryParams
                => services.Configure<TRSAFactoryParams>(section).AddRSAFactory<TRSAFactoryParams>();

        public static IServiceCollection AddRSAFactory<TRSAFactoryParams>(this IServiceCollection services, TRSAFactoryParams param)
            where TRSAFactoryParams : RSAFactoryParams
                => services.AddSingleton(Options.Create(param)).AddRSAFactory<TRSAFactoryParams>();
    }
}