using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Authentication.Cookies;
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.DataProtection;
using Microsoft.AspNetCore.Hosting;
using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.HttpsPolicy;
using Microsoft.AspNetCore.Mvc;
using Microsoft.EntityFrameworkCore;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Polly;
using ThAmCo.Stock.Data;
using ThAmCo.Stock.Data.StockContext;

namespace ThAmCo.Stock
{
    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<CookiePolicyOptions>(options =>
            {
                // This lambda determines whether user consent for non-essential cookies is needed for a given request.
                options.CheckConsentNeeded = context => true;
                options.MinimumSameSitePolicy = SameSiteMode.None;
            });

            services.AddMvc().SetCompatibilityVersion(CompatibilityVersion.Version_2_2);

            services.AddDbContext<StockDbContext>(options => options.UseSqlServer(
                Configuration.GetConnectionString("ProductsSqlConnection"), optionsBuilder =>
                    optionsBuilder.EnableRetryOnFailure(3, TimeSpan.FromSeconds(10), null)
            ));

            services.AddAuthentication("Cookies")
                    .AddCookie("Cookies");

            services.AddAuthorization(options =>
            {
                options.AddPolicy("StaffOnly", builder =>
                {
                    builder.RequireClaim("role", "Staff");
                });
            });

            services.AddHttpClient("StandardRequest")
                .AddTransientHttpErrorPolicy(p =>
                    p.OrResult(msg => msg.StatusCode == System.Net.HttpStatusCode.NotFound)
                        .WaitAndRetryAsync(3, retryAttempt => TimeSpan.FromSeconds(Math.Pow(2, retryAttempt))))
                .AddTransientHttpErrorPolicy(p =>
                    p.CircuitBreakerAsync(5, TimeSpan.FromSeconds(30)));

            services.AddScoped<IStockContext, StockContext>();
        }

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

            app.UseHttpsRedirection();
            app.UseStaticFiles();
            app.UseCookiePolicy();

            app.UseMvc(routes =>
            {
                routes.MapRoute(
                    name: "default",
                    template: "{controller=Home}/{action=Index}/{id?}");
            });
        }
    }
}