using Microsoft.AspNetCore.Authentication.JwtBearer;
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.AspNetCore.Identity;
using Microsoft.EntityFrameworkCore;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting;
using Microsoft.IdentityModel.Tokens;
using Newtonsoft.Json;
using StudyLib.API.Data;
using StudyLib.API.Models;
using System;
using System.Text;

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

        public IConfiguration Configuration { get; }

        // This method gets called by the runtime. Use this method to add services to the container.
        public void ConfigureServices(IServiceCollection services)
        {
            services.Configure<ApplicationSettings>(Configuration.GetSection("ApplicationSettings"));
            services.AddCors(options =>
            {
                options.AddPolicy(name: "AllowSpecificOrigins",
                                  builder =>
                                  {
                                      builder.WithOrigins("http://localhost:4200")
                                      .AllowAnyHeader()
                                      .AllowAnyMethod();
                                  });
            });
            services.AddControllers().AddNewtonsoftJson(options => {
                options.SerializerSettings.ReferenceLoopHandling = Newtonsoft.Json.ReferenceLoopHandling.Ignore;
                options.SerializerSettings.NullValueHandling = NullValueHandling.Ignore;
            });
            services.AddAuthentication(opt => {
                opt.DefaultAuthenticateScheme = JwtBearerDefaults.AuthenticationScheme;
                opt.DefaultChallengeScheme = JwtBearerDefaults.AuthenticationScheme;
                opt.DefaultScheme = JwtBearerDefaults.AuthenticationScheme;
            })
            .AddJwtBearer(options =>
            {
                options.RequireHttpsMetadata = false;
                options.SaveToken = true;

                options.TokenValidationParameters = new TokenValidationParameters
                {
                    ValidateIssuer = false,
                    ValidateAudience = false,
                    ValidateLifetime = true,
                    ValidateIssuerSigningKey = true,
                    ClockSkew = TimeSpan.Zero,
                    IssuerSigningKey = new SymmetricSecurityKey(Encoding.UTF8.GetBytes(Configuration["ApplicationSettings:JWTSecret"].ToString()))
                };
            });
            services.AddDbContext<StudyLibContext>(options =>
            options.UseSqlServer(Configuration.GetConnectionString("StudyLibContext")));
            services.AddDefaultIdentity<User>(options => options.SignIn.RequireConfirmedAccount = true).AddEntityFrameworkStores<StudyLibContext>();
            services.Configure<IdentityOptions>(options =>
            {
                options.Password.RequireDigit = false;
                options.Password.RequiredLength = 4;
                options.Password.RequireLowercase = false;
                options.Password.RequireNonAlphanumeric = false;
                options.Password.RequireUppercase = false;
            });
        }

        // This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
        public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
        {
            if (env.IsDevelopment())
            {
                app.UseDeveloperExceptionPage();
            }

            app.UseCors("AllowSpecificOrigins");

            app.UseHttpsRedirection();

            app.UseRouting();

            app.UseAuthentication();

            app.UseAuthorization();

            app.UseEndpoints(endpoints =>
            {
                endpoints.MapControllers();
            });
        }
    }
}