using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Net;
using System.Runtime.Serialization.Json;
using System.Text;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Mvc;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting;
using Microsoft.Extensions.Logging;
using RepositoryLibrary;
using SharedLibrary.Models;

namespace ApiService
{
    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.AddScoped<IRepository, LocalRepository>();
            services.AddControllers();
        }

        // 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.UseRouting();

            app.Use(async (context, next) =>
            {
                try
                {
                    await next();
                }
                catch (Exception ex)
                {
                    var error = new RepositoryError
                    {
                        Information = ex.Message,
                        StackTrack = ex.StackTrace
                    };
                    var dc = new DataContractJsonSerializer(typeof(RepositoryError));
                    using (var ms = new MemoryStream())
                    {
                        dc.WriteObject(ms, error);
                        var response = new StringBuilder(Encoding.UTF8.GetString(ms.ToArray()));
                        context.Response.StatusCode = (int)HttpStatusCode.BadRequest;
                        context.Response.ContentType = "application/json";
                        await context.Response.WriteAsync(response.ToString());
                    }
                }
            });
            app.UseAuthorization();

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