using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.AspNetCore.HttpsPolicy;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting;
using SignalRChat.Hubs;
using MediatR.Pipeline;
using Sledgemapper.Api.Data;
using Microsoft.EntityFrameworkCore;
using MediatR;
using Microsoft.IdentityModel.Tokens;
using Sledgemapper.Helpers;
using Microsoft.AspNetCore.Authentication.JwtBearer;
using System.Text;
using AutoMapper;
using Sledgemapper.Services;
using System.Security.Claims;

namespace SignalRChat
{
    public class Startup
    {
        private readonly IWebHostEnvironment _env;
        public IConfiguration Configuration { get; }
        public Startup(IWebHostEnvironment env, IConfiguration configuration)
        {
            Configuration = configuration;
            _env = env;

        }


        // This method gets called by the runtime. Use this method to add services to the container.
        public void ConfigureServices(IServiceCollection services)
        {
            if (_env.IsProduction())
                services.AddDbContext<DataContext>();
            else
                services.AddDbContext<DataContext, SqliteDataContext>();

           // services.AddRazorPages();
             services.AddCors();
            services.AddControllers();
            services.AddSignalR();
            services.AddAutoMapper(AppDomain.CurrentDomain.GetAssemblies());
            services.AddMediatR(typeof(Startup));
            services.AddDbContext<MyDbContext>(options => {options.UseSqlite("Data Source=sledgemapper.db"); options.UseQueryTrackingBehavior(QueryTrackingBehavior.NoTracking);});

            //    services.AddEntityFrameworkSqlite().AddDbContext<MyDbContext>();
           // configure strongly typed settings objects
           var c = Configuration.GetSection("AppSettings");
            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.Events = new JwtBearerEvents
                {
                    OnTokenValidated = context =>
                    {
                        var userService = context.HttpContext.RequestServices.GetRequiredService<IUserService>();
                        var userId = int.Parse(context.Principal.Identity.Name);
                        var user = userService.GetById(userId);
                        if (user == null)
                        {
                            // return unauthorized if user no longer exists
                            context.Fail("Unauthorized");
                        }
                        context.HttpContext.User.Claims.Append(new Claim(ClaimTypes.Name, user.Username));
                        context.HttpContext.User.Claims.Append(new Claim(ClaimTypes.NameIdentifier, user.Id.ToString()));
                        return Task.CompletedTask;
                    }
                };
                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<IUserService, UserService>();

        }

        // This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
        public void Configure(IApplicationBuilder app, IWebHostEnvironment env, DataContext dataContext)
        {
              dataContext.Database.Migrate();

            // if (env.IsDevelopment())
            // {
            //     app.UseDeveloperExceptionPage();
            // }
            // else
            // {
            //     app.UseExceptionHandler("/Error");
            //     // The default HSTS value is 30 days. You may want to change this for production scenarios, see https://aka.ms/aspnetcore-hsts.
            //     app.UseHsts();
            // }

            // //app.UseHttpsRedirection();
            // app.UseStaticFiles();

            app.UseRouting();
            // global cors policy
            app.UseCors(x => x
                .AllowAnyOrigin()
                .AllowAnyMethod()
                .AllowAnyHeader());
            app.UseAuthentication();
            app.UseAuthorization();

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

            app.UseEndpoints(endpoints =>
            {
               // endpoints.MapRazorPages();
                endpoints.MapHub<SledgemapperHub>("/sledgemapperhub");

            });
        }
    }
}