using Insight.Infrastructure.Entities;
using Insight.Infrastructure.Services;
using Microsoft.AspNetCore.Authentication.JwtBearer;
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.HttpOverrides;
using Microsoft.AspNetCore.Identity;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Primitives;
using Microsoft.IdentityModel.Tokens;
using Microsoft.Net.Http.Headers;
using MongoDB.Bson;
using System.Text;

namespace Insight.Infrastructure;

public static partial class ServiceExtensions
{
    public static IServiceCollection AddTokenServices(this IServiceCollection services, IConfiguration configuration)
    {
        var options = new Models.TokenOptions(
            key: configuration.GetValue<string?>(Appsettings.Jwt.Key) ?? throw new Exception($"{Appsettings.Jwt.Key} value not set (appsettings)"),
            expires: configuration.GetValue<int?>(Appsettings.Jwt.Exp) ?? throw new Exception($"{Appsettings.Jwt.Exp} value not set (appsettings)"),
            audience: configuration.GetValue<Uri?>(Appsettings.Jwt.Audience) ?? throw new Exception($"{Appsettings.Jwt.Audience} value not set (appsettings)"),
            issuer: configuration.GetValue<Uri?>(Appsettings.Jwt.Issuer) ?? throw new Exception($"{Appsettings.Jwt.Issuer} value not set (appsettings)"));

        services.AddSingleton(options);
        services.AddTransient<TokenService>();

        return services;
    }

    public static IServiceCollection AddProxyServices(this IServiceCollection services)
    {
        // add before routing
        services.Configure<ForwardedHeadersOptions>(options =>
        {
            options.ForwardedHeaders = ForwardedHeaders.XForwardedFor | ForwardedHeaders.XForwardedProto;
        });

        return services;
    }

    public static IServiceCollection AddRoutingServices(this IServiceCollection services)
    {
        // add after proxy
        services.AddRouting(options =>
        {
            options.LowercaseUrls = true;
        });

        return services;
    }

    public static IServiceCollection AddIdentityServices(this IServiceCollection services, IConfiguration configuration)
    {
        var connectionString = configuration.GetValue<string?>(Appsettings.Mongo.ConnectionString) ?? throw new Exception($"{Appsettings.Mongo.ConnectionString} value not set (appsettings)");

        services.AddIdentity<InsightUser, InsightRole>(options =>
        {

        })
        .AddMongoDbStores<InsightUser, InsightRole, ObjectId>(connectionString, Settings.Database)
        .AddDefaultTokenProviders()
        .AddSignInManager();

        return services;
    }

    public static IServiceCollection AddCustomAuthentication(this IServiceCollection services, IConfiguration configuration)
    {
        // REWRITE TO COOKIE ONLY FOR WEB

        services.AddAuthentication(options =>
        {
            options.DefaultScheme = "Custom";
            options.DefaultChallengeScheme = "Custom";
        })
        .AddCookie("Cookies", options =>
        {
            //options.Cookie.Domain = "insight.webmatic.de";
            options.Cookie.Name = "insight";
            options.LoginPath = "/account/login";
            options.LogoutPath = "/account/logout";
            options.ExpireTimeSpan = TimeSpan.FromHours(1);
            options.SlidingExpiration = true;

            options.Events.OnRedirectToLogin = options =>
            {
                if (options.Request.Path.StartsWithSegments("/api") && options.Response.StatusCode == 200)
                    options.Response.StatusCode = 401;
                else
                    options.Response.Redirect(options.RedirectUri);

                return Task.CompletedTask;
            };
        })
        .AddJwtBearer("Bearer", options =>
        {
            options.RequireHttpsMetadata = false;
            options.SaveToken = true;

            options.TokenValidationParameters.ValidateActor = false;

            options.TokenValidationParameters.ValidAudience = configuration.GetSection("Jwt:Audience").Value;
            options.TokenValidationParameters.ValidateAudience = true;

            options.TokenValidationParameters.ValidIssuer = configuration.GetSection("Jwt:Issuer").Value;
            options.TokenValidationParameters.ValidateIssuer = true;

            options.TokenValidationParameters.IssuerSigningKey = new SymmetricSecurityKey(
                Encoding.UTF8.GetBytes(configuration.GetSection("Jwt:Key").Value ?? throw new Exception("Configuration for [Jwt:Key] not found"))
            );

            options.TokenValidationParameters.ValidateIssuerSigningKey = true;
            options.TokenValidationParameters.ValidateLifetime = true;
        })
        .AddPolicyScheme("Custom", "Custom", options =>
        {
            options.ForwardDefaultSelector = context =>
            {
                if (context.Request.Headers[HeaderNames.Authorization] is StringValues auth && auth.ToString().StartsWith("Bearer "))
                    return "Bearer";
                else
                    return "Cookies";
            };
        });

        return services;
    }

    public static IServiceCollection AddBearerAuthentication(this IServiceCollection services, IConfiguration configuration)
    {
        services.AddAuthentication(options =>
        {
            options.DefaultAuthenticateScheme = JwtBearerDefaults.AuthenticationScheme;
            options.DefaultChallengeScheme = JwtBearerDefaults.AuthenticationScheme;
            options.DefaultSignInScheme = JwtBearerDefaults.AuthenticationScheme;
        })
        .AddJwtBearer(options =>
        {
            options.RequireHttpsMetadata = false;
            options.SaveToken = true;

            options.TokenValidationParameters.ValidateActor = false;

            options.TokenValidationParameters.ValidAudience = configuration.GetValue<string?>(Appsettings.Jwt.Audience) ?? throw new Exception($"{Appsettings.Jwt.Audience} value not set (appsettings)");
            options.TokenValidationParameters.ValidateAudience = true;

            options.TokenValidationParameters.ValidIssuer = configuration.GetValue<string?>(Appsettings.Jwt.Issuer) ?? throw new Exception($"{Appsettings.Jwt.Issuer} value not set (appsettings)");
            options.TokenValidationParameters.ValidateIssuer = true;

            options.TokenValidationParameters.IssuerSigningKey = new SymmetricSecurityKey(
                Encoding.UTF8.GetBytes(configuration.GetValue<string?>(Appsettings.Jwt.Key) ?? throw new Exception($"{Appsettings.Jwt.Key} value not set (appsettings)"))
            );

            options.TokenValidationParameters.ValidateIssuerSigningKey = true;
            options.TokenValidationParameters.ValidateLifetime = true;
        });

        return services;
    }

    //private static IServiceCollection AddIdentityServices2(this IServiceCollection services, IConfiguration configuration)
    //{
    //    var identityOptions = new MongoDbIdentityConfiguration
    //    {
    //        MongoDbSettings = new MongoDbSettings
    //        {
    //            ConnectionString = configuration.GetSection("ConnectionStrings:Mongo").Value,
    //            DatabaseName = "insight"
    //        },
    //        IdentityOptionsAction = options =>
    //        {
    //            options.User.RequireUniqueEmail = true;
    //            options.User.AllowedUserNameCharacters = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789@.-_";

    //            options.Password.RequireDigit = false;
    //            options.Password.RequiredLength = 8;
    //            options.Password.RequireNonAlphanumeric = false;
    //            options.Password.RequireUppercase = false;
    //            options.Password.RequireLowercase = false;

    //            options.SignIn.RequireConfirmedAccount = false;
    //            options.SignIn.RequireConfirmedEmail = false;
    //            options.SignIn.RequireConfirmedPhoneNumber = false;

    //            options.Lockout.MaxFailedAccessAttempts = 5;
    //            options.Lockout.DefaultLockoutTimeSpan = TimeSpan.FromMinutes(5);
    //        }
    //    };

    //    services.ConfigureMongoDbIdentity<InsightUser, InsightRole, ObjectId>(identityOptions)
    //    .AddDefaultTokenProviders()
    //    .AddSignInManager<InsightUser>();

    //    return services;
    //}

    //private static IServiceCollection AddIdentityAuthentication(this IServiceCollection services, IConfiguration configuration)
    //{
    //    services.AddAuthentication(options =>
    //    {
    //        options.DefaultAuthenticateScheme =
    //    });
    //    cookieBuilder.ApplicationCookie = builder.AddApplicationCookie();
    //    cookieBuilder.ExternalCookie = builder.AddExternalCookie();
    //    cookieBuilder.TwoFactorRememberMeCookie = builder.AddTwoFactorRememberMeCookie();
    //    cookieBuilder.TwoFactorUserIdCookie = builder.AddTwoFactorUserIdCookie();
    //    .AddCookie(options =>
    //    {
    //        options.
    //    };
    //    .AddIdentityCookies();
    //    .AddCookie(options =>
    //    {
    //        // Specify where to redirect un-authenticated users
    //        options.LoginPath = "/account/login";

    //        // Specify the name of the auth cookie.
    //        // ASP.NET picks a dumb name by default.
    //        options.Cookie.Name = "insight";
    //    });

    //    return services;
    //}
}