using Microsoft.AspNetCore.Authentication.JwtBearer;
using Microsoft.AspNetCore.ResponseCompression;

using PrivaPub.ClientModels;
using PrivaPub.Extensions;
using PrivaPub.Models;
using PrivaPub.Services;
using PrivaPub.StaticServices;

using System.Text.Json.Serialization;
using Microsoft.OpenApi;
using PrivaPub.Services.ClientToServer.Private;
using PrivaPub.Services.ClientToServer.Public;
using PrivaPub.Services.Federation;

namespace PrivaPub.Middleware
{
	public static class PrivaPubConfigurations
	{
		public static IServiceCollection PrivaPubAppSettingsConfiguration(this IServiceCollection service, IConfiguration configuration)
		{
			return service
				.Configure<MongoSettings>(configuration.GetSection(nameof(MongoSettings)))
				.Configure<AppConfiguration>(configuration.GetSection(nameof(AppConfiguration)));
		}
		public static IServiceCollection PrivaPubWorkersConfiguration(this IServiceCollection service)
		{
			return service;
			//.AddHostedService<DiscussionsWorker>()
			//.AddHostedService<GroupsCleanerWorker>()
			//.AddHostedService<PoliciesCleanerWorker>();
		}
		public static IServiceCollection PrivaPubFederationConfiguration(this IServiceCollection service)
		{
			service.AddHttpClient(RemoteActorService.HttpClientName, client =>
			{
				client.Timeout = TimeSpan.FromSeconds(20);
				client.DefaultRequestHeaders.UserAgent.ParseAdd($"PrivaPub/{BuildInfo.Ref}");
			});
			return service
				.AddSingleton<ILocalActorService, LocalActorService>()
				.AddSingleton<IRemoteActorService, RemoteActorService>()
				.AddSingleton<IDeliveryService, DeliveryService>()
				.AddTransient<IInboxService, InboxService>()
				.AddHostedService<DeliveryWorker>();
		}
		public static IServiceCollection PrivaPubAuthServicesConfiguration(this IServiceCollection service, IConfiguration configuration)
		{
			return service
				.AddAuthorization(options =>
				{
					options.AddPolicy(Policies.IsUser, Extensions.Extensions.IsUserPolicy());
					options.AddPolicy(Policies.IsAdmin, Extensions.Extensions.IsAdminPolicy());
					options.AddPolicy(Policies.IsModerator, Extensions.Extensions.IsModeratorPolicy());
				})
				.AddAuthentication(options =>
				{
					options.DefaultAuthenticateScheme = JwtBearerDefaults.AuthenticationScheme;
					options.DefaultChallengeScheme = JwtBearerDefaults.AuthenticationScheme;
					options.DefaultScheme = JwtBearerDefaults.AuthenticationScheme;
				})
				.AddPrivaPubAuth(configuration)
				.Services
				.AddSingleton<AuthTokenManager>()
				.AddSingleton<IPasswordHasher, PasswordHasher>();
		}
		public static IServiceCollection PrivaPubInternalizationConfiguration(this IServiceCollection service, IConfiguration configuration)
		{
			return service
				.AddLocalization()
				.AddSingleton<RequestLocalizationOptionsService>();
		}

		public static IServiceCollection PrivaPubOptimizationConfiguration(this IServiceCollection service)
		{
			return service.AddResponseCompression(opts =>
			{
				opts.Providers.Add<BrotliCompressionProvider>();
				opts.MimeTypes = ResponseCompressionDefaults.MimeTypes.Concat(new[] { "application/octet-stream" });
			});
		}

		public static IServiceCollection PrivaPubDataBaseConfiguration(this IServiceCollection service)
		{
			return service.AddSingleton<DbEntities>();
		}

		public static IServiceCollection PrivaPubServicesConfiguration(this IServiceCollection service)
		{
			return service
				.AddTransient<IDataService, DataService>()
				.AddTransient<IRootUsersService, RootUsersService>()
				.AddTransient<IPublicAvatarUsersService, PublicAvatarUsersService>()
				.AddTransient<IPrivateAvatarUsersService, PrivateAvatarUsersService>()
				.AddTransient<IGroupUsersService, GroupUsersService>()
				.AddTransient<IPostsService, PostsService>()
				.AddSingleton<AppConfigurationService>()
				.AddHttpContextAccessor()
				.AddMemoryCache()
				.AddSingleton<IPasswordHasher, PasswordHasher>();
		}

		public static IServiceCollection PrivaPubMiddlewareConfiguration(this IServiceCollection service)
		{
			return service
				.AddEndpointsApiExplorer()
				.AddSwaggerGen(c =>
				{
					c.AddSecurityDefinition("Bearer", new OpenApiSecurityScheme
					{
						In = ParameterLocation.Header,
						Description = "Please enter a valid token",
						Name = "Authorization",
						Type = SecuritySchemeType.Http,
						BearerFormat = "JWT",
						Scheme = "bearer"
					});
					c.AddSecurityRequirement(document => new OpenApiSecurityRequirement
					{
						[new OpenApiSecuritySchemeReference("Bearer", document)] = []
					});
				})
				.AddControllers(options => { options.Filters.Add<OperationCancelledExceptionFilter>(); })
				.AddJsonOptions(options =>
				{
					options.JsonSerializerOptions.IgnoreReadOnlyFields = false;
					options.JsonSerializerOptions.IgnoreReadOnlyProperties = false;
					options.JsonSerializerOptions.PropertyNameCaseInsensitive = true;
					options.JsonSerializerOptions.DefaultIgnoreCondition = JsonIgnoreCondition.WhenWritingNull;
					options.JsonSerializerOptions.Converters.Add(new JsonStringEnumConverter());
				}).Services;
		}

		public static IServiceCollection PrivaPubCORSConfiguration(this IServiceCollection service)
		{
			return service.AddCors(options =>
			{
				options.DefaultPolicyName = "DefaultCORS";
				options.AddDefaultPolicy(configure =>
				{
					configure.AllowAnyMethod()
						.AllowAnyHeader()
						.AllowAnyOrigin()
						.AllowAnyMethod()
						.DisallowCredentials();
				});
			});
		}

	}
}