using System;
using Microsoft.AspNetCore.Antiforgery;
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.SpaServices.Webpack;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Logging;
using Newtonsoft.Json.Serialization;
using eShopOnContainers.WebSPA;
using Microsoft.Extensions.HealthChecks;
using System.Threading.Tasks;

namespace eShopConContainers.WebSPA
{
    public class Startup
    {
        private IHostingEnvironment _hostingEnv;
        public Startup(IHostingEnvironment env)
        {
            _hostingEnv = env;

            var builder = new ConfigurationBuilder()
                           .SetBasePath(env.ContentRootPath)
                           .AddJsonFile("appsettings.json", optional: true, reloadOnChange: true)
                           .AddJsonFile($"appsettings.{env.EnvironmentName}.json", optional: true)
                           .AddEnvironmentVariables();

            if (env.IsDevelopment())
            {
                // For more details on using the user secret store see http://go.microsoft.com/fwlink/?LinkID=532709
                builder.AddUserSecrets();
            }

            Configuration = builder.Build();
        }

        public static IConfigurationRoot Configuration { get; set;}
        // This method gets called by the runtime. Use this method to add services to the container.
        // For more information on how to configure your application, visit http://go.microsoft.com/fwlink/?LinkID=398940
        public void ConfigureServices(IServiceCollection services)
        {
            services.AddHealthChecks(checks =>
            {
                checks.AddValueTaskCheck("HTTP Endpoint", () => new ValueTask<IHealthCheckResult>(HealthCheckResult.Healthy("Ok")));
            });

            services.Configure<AppSettings>(Configuration);

            services.AddAntiforgery(options => options.HeaderName = "X-XSRF-TOKEN");

            services.AddMvc()
                .AddJsonOptions(options =>
                {
                    options.SerializerSettings.ContractResolver = new CamelCasePropertyNamesContractResolver();
                });
        }


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

            // Configure XSRF middleware, This pattern is for SPA style applications where XSRF token is added on Index page 
            // load and passed back token on every subsequent async request            
            app.Use(async (context, next) =>
            {
                if (string.Equals(context.Request.Path.Value, "/", StringComparison.OrdinalIgnoreCase))
                {
                    var tokens = antiforgery.GetAndStoreTokens(context);
                    context.Response.Cookies.Append("XSRF-TOKEN", tokens.RequestToken, new CookieOptions() { HttpOnly = false });
                }
                await next.Invoke();
            });

            app.UseStaticFiles();

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

                routes.MapSpaFallbackRoute(
                    name: "spa-fallback",
                    defaults: new { controller = "Home", action = "Index" });
            });
        }
    }
}