using FluentValidation;
using Gameboard.ShogiUI.Sockets.Managers;
using Gameboard.ShogiUI.Sockets.Managers.ClientActionHandlers;
using Gameboard.ShogiUI.Sockets.Repositories;
using Gameboard.ShogiUI.Sockets.ServiceModels.Socket;
using Gameboard.ShogiUI.Sockets.Services;
using Gameboard.ShogiUI.Sockets.Services.RequestValidators;
using Microsoft.AspNetCore.Authentication;
using Microsoft.AspNetCore.Authentication.Cookies;
using Microsoft.AspNetCore.Authentication.JwtBearer;
using Microsoft.AspNetCore.HttpLogging;
using Microsoft.Identity.Web;
using Microsoft.OpenApi.Models;
using Newtonsoft.Json;
using Newtonsoft.Json.Converters;
using Newtonsoft.Json.Serialization;
using System.Text;

namespace Gameboard.ShogiUI.Sockets
{
	public class Program
	{
		public static void Main(string[] args)
		{
			var builder = WebApplication.CreateBuilder(args);

			ConfigureAuthentication(builder);
			ConfigureControllersWithNewtonsoft(builder);
			ConfigureSwagger(builder);
			ConfigureDependencyInjection(builder);
			ConfigureLogging(builder);

			var app = builder.Build();

			app.UseHttpLogging();

			// Configure the HTTP request pipeline.
			if (app.Environment.IsDevelopment())
			{
				app.UseSwagger();
				app.UseSwaggerUI(options =>
				{
					options.OAuthScopes("api://c1e94676-cab0-42ba-8b6c-9532b8486fff/DefaultScope");
					options.OAuthConfigObject.ClientId = builder.Configuration["AzureAd:SwaggerUIClientId"];
					options.OAuthConfigObject.UsePkceWithAuthorizationCodeGrant = true;
				});
				app.UseHttpsRedirection(); // Apache handles HTTPS in production.
			}

			app.UseAuthentication();
			app.UseAuthorization();

			app.MapControllers();
			UseCorsAndWebSockets(app);

			app.Run();
		}

		private static void UseCorsAndWebSockets(WebApplication app)
		{
			// TODO: Figure out how to make a middleware for sockets?
			var socketService = app.Services.GetRequiredService<ISocketService>();

			var origins = new[] {
				"http://localhost:3000", "https://localhost:3000",
				"http://127.0.0.1:3000", "https://127.0.0.1:3000",
				"https://api.lucaserver.space", "https://lucaserver.space"
			};
			var socketOptions = new WebSocketOptions();
			foreach (var o in origins)
				socketOptions.AllowedOrigins.Add(o);
			app.UseCors(opt => opt.WithOrigins(origins).AllowAnyMethod().AllowAnyHeader().WithExposedHeaders("Set-Cookie").AllowCredentials());
			app.UseWebSockets(socketOptions);
			app.Use(async (context, next) =>
			{
				Console.WriteLine("Use websocket");
				if (context.WebSockets.IsWebSocketRequest)
				{
					Console.WriteLine("Is websocket request");
					await socketService.HandleSocketRequest(context);
				}
				else
				{
					await next();
				}
			});
		}

		private static void ConfigureLogging(WebApplicationBuilder builder)
		{
			builder.Services.AddHttpLogging(options =>
			{
				options.LoggingFields = HttpLoggingFields.Request;
			});
		}

		private static void ConfigureAuthentication(WebApplicationBuilder builder)
		{
			// Add services to the container.
			builder.Services
				.AddAuthentication(JwtBearerDefaults.AuthenticationScheme)
				.AddMicrosoftIdentityWebApi(builder.Configuration.GetSection("AzureAd"));

			builder.Services
				.AddAuthentication("CookieOrJwt")
				.AddPolicyScheme("CookieOrJwt", "Either cookie or jwt", options =>
				{
					options.ForwardDefaultSelector = context =>
					{
						var bearerAuth = context.Request.Headers["Authorization"].FirstOrDefault()?.StartsWith("Bearer ") ?? false;
						return bearerAuth
						? JwtBearerDefaults.AuthenticationScheme
						: CookieAuthenticationDefaults.AuthenticationScheme;
					};
				})
				.AddCookie(options =>
				{
					options.Cookie.Name = "session-id";
					options.Cookie.SameSite = SameSiteMode.None;
					options.Cookie.SecurePolicy = CookieSecurePolicy.Always;
					options.SlidingExpiration = true;
				});
		}

		private static void ConfigureControllersWithNewtonsoft(WebApplicationBuilder builder)
		{
			builder.Services
				.AddControllers()
				.AddNewtonsoftJson(options =>
				{
					options.SerializerSettings.Formatting = Formatting.Indented;
					options.SerializerSettings.ContractResolver = new DefaultContractResolver
					{
						NamingStrategy = new CamelCaseNamingStrategy { ProcessDictionaryKeys = true }
					};
					options.SerializerSettings.Converters = new[] { new StringEnumConverter() };
					options.SerializerSettings.NullValueHandling = NullValueHandling.Ignore;
				});

			JsonConvert.DefaultSettings = () => new JsonSerializerSettings
			{
				Formatting = Formatting.Indented,
				ContractResolver = new DefaultContractResolver
				{
					NamingStrategy = new CamelCaseNamingStrategy
					{
						ProcessDictionaryKeys = true
					}
				},
				Converters = new[] { new StringEnumConverter() },
				NullValueHandling = NullValueHandling.Ignore,
			};
		}

		private static void ConfigureDependencyInjection(WebApplicationBuilder builder)
		{
			var services = builder.Services;
			services.AddSingleton<IJoinByCodeHandler, JoinByCodeHandler>();
			services.AddSingleton<ISocketConnectionManager, SocketConnectionManager>();
			services.AddSingleton<ISocketTokenCache, SocketTokenCache>();
			services.AddSingleton<IGameboardManager, GameboardManager>();
			services.AddSingleton<IValidator<JoinByCodeRequest>, JoinByCodeRequestValidator>();
			services.AddSingleton<IValidator<JoinGameRequest>, JoinGameRequestValidator>();
			services.AddSingleton<ISocketService, SocketService>();
			services.AddTransient<IGameboardRepository, GameboardRepository>();
			services.AddSingleton<IClaimsTransformation, ShogiUserClaimsTransformer>();
			services.AddHttpClient("couchdb", c =>
			{
				var base64 = Convert.ToBase64String(Encoding.UTF8.GetBytes("admin:admin"));
				c.DefaultRequestHeaders.Add("Accept", "application/json");
				c.DefaultRequestHeaders.Add("Authorization", $"Basic {base64}");

				var baseUrl = $"{builder.Configuration["AppSettings:CouchDB:Url"]}/{builder.Configuration["AppSettings:CouchDB:Database"]}/";
				c.BaseAddress = new Uri(baseUrl);
			});
			services.AddTransient<IModelMapper, ModelMapper>();
		}

		private static void ConfigureSwagger(WebApplicationBuilder builder)
		{
			// Learn more about configuring Swagger/OpenAPI at https://aka.ms/aspnetcore/swashbuckle
			builder.Services.AddEndpointsApiExplorer();
			builder.Services.AddSwaggerGen(options =>
			{
				var bearerKey = "Bearer";
				options.AddSecurityDefinition(bearerKey, new OpenApiSecurityScheme
				{
					Type = SecuritySchemeType.OAuth2,
					Flows = new OpenApiOAuthFlows
					{
						Implicit = new OpenApiOAuthFlow
						{
							AuthorizationUrl = new Uri("https://login.microsoftonline.com/common/oauth2/v2.0/authorize"),
							TokenUrl = new Uri("https://login.microsoftonline.com/common/oauth2/v2.0/token"),
							Scopes = new Dictionary<string, string>
							{
								{ "api://c1e94676-cab0-42ba-8b6c-9532b8486fff/DefaultScope", "Default Scope" }
							}
						}
					},
					Scheme = "Bearer",
					BearerFormat = "JWT",
					In = ParameterLocation.Header,
				});
				// This adds the lock symbol next to every route in SwaggerUI.
				options.AddSecurityRequirement(new OpenApiSecurityRequirement
				{
					{
						new OpenApiSecurityScheme{ Reference = new OpenApiReference{ Type = ReferenceType.SecurityScheme, Id = bearerKey } },
						Array.Empty<string>()
					}
				});
			});
		}
	}
}