using Microsoft.AspNetCore.Authentication.JwtBearer;
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.AspNetCore.Mvc;
using Microsoft.AspNetCore.Mvc.Cors.Internal;
using Microsoft.EntityFrameworkCore;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.IdentityModel.Tokens;
using Newtonsoft.Json;
using ProRestaurant.Classes;
using ProRestaurant.DBContexts;
using ProRestaurant.Repository.Accounts;
using ProRestaurant.Repository.Restaurants;
using System.Text;

namespace ProRestaurant
{
    public class Startup
    {
        public Startup(IConfiguration configuration)
        {
            Configuration = configuration;
        }

        public IConfiguration Configuration { get; }
        
        public void ConfigureServices(IServiceCollection services)
        {
            services.AddCors(o => o.AddPolicy("MyPolicy", builder =>
            {
                builder.AllowAnyOrigin()
                       .AllowAnyMethod()
                       .AllowAnyHeader();
            }));
            services.AddMvc().SetCompatibilityVersion(CompatibilityVersion.Version_2_2);
            services.AddMvc().AddJsonOptions(options => {
                options.SerializerSettings.ReferenceLoopHandling = ReferenceLoopHandling.Ignore;
            });

            #region Authentication Setup
            // configure strongly typed settings objects
            var appSettingsSection = Configuration.GetSection("AppSettings");
            services.Configure<AppSettings>(appSettingsSection);

            // configure jwt authentication
            var appSettings = appSettingsSection.Get<AppSettings>();
            var key = Encoding.ASCII.GetBytes(appSettings.Secret);
            services.AddAuthentication(x =>
            {
                x.DefaultAuthenticateScheme = JwtBearerDefaults.AuthenticationScheme;
                x.DefaultChallengeScheme = JwtBearerDefaults.AuthenticationScheme;
            })
            .AddJwtBearer(x =>
            {
                x.RequireHttpsMetadata = false;
                x.SaveToken = true;
                x.TokenValidationParameters = new TokenValidationParameters
                {
                    ValidateIssuerSigningKey = true,
                    IssuerSigningKey = new SymmetricSecurityKey(key),
                    ValidateIssuer = false,
                    ValidateAudience = false
                };
            });

            // configure DI for application services
            services.AddScoped<IAuthenticateRepository, AuthenticateRepository>();
            #endregion

            services.AddDbContext<DBContext>(o => o.UseSqlServer(Configuration.GetConnectionString("DefaultDatabase")));           

            services.AddTransient<IRegistrationRepository, RegistrationRepository>();
            services.AddTransient<IRestaurantCategoryRepository, RestaurantCategoryRepository>();
            services.AddTransient<IRestaurantRepository, RestaurantRepository>();
            services.AddTransient<IUserRepository, UserRepository>();
            services.AddTransient<IMenuCategoryRepository, MenuCategoryRepository>();
            services.AddTransient<IMenuOptionRepository, MenuOptionRepository>();
            services.AddTransient<IMenuItemRepository, MenuItemRepository>();
            services.AddTransient<IMenuRepository, MenuRepository>();
            services.AddTransient<IRestaurantUserRepository, RestaurantUserRepository>();
            services.AddTransient<IRestaurantRoleRepository, RestaurantRoleRepository>();

            services.Configure<MvcOptions>(options =>
            {
                options.Filters.Add(new CorsAuthorizationFilterFactory("MyPolicy"));
            });
        }
        
        public void Configure(IApplicationBuilder app, IHostingEnvironment env)
        {
            if (env.IsDevelopment())
            {
                app.UseDeveloperExceptionPage();
            }
            else
            {                
                app.UseHsts();
            }

            app.UseCors(x => x
                 .AllowAnyOrigin()
                 .AllowAnyMethod()
                 .AllowAnyHeader());
            app.UseAuthentication();
            app.UseHttpsRedirection();
            app.UseMvc();
        }
    }
}