using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Authentication.Cookies;
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.AspNetCore.Http;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting;
using Microsoft.Extensions.FileProviders;
using WebApiClient;
using System.Globalization;
using Microsoft.AspNetCore.Mvc.Razor;
using Microsoft.AspNetCore.Localization;
using AMESCoreStudio.Web.Code;
using Microsoft.AspNetCore.Http.Features;

namespace AMESCoreStudio.Web
{
    public class Startup
    {
        public Startup(IConfiguration configuration)
        {
            Configuration = configuration;
        }

        public IConfiguration Configuration { get; }

        public void ConfigureServices(IServiceCollection services)
        {
            // 擴充JSON 
            services.AddControllers().AddNewtonsoftJson();

            // FormPost數量上限
            services.Configure<FormOptions>(options =>
            {
                options.ValueLengthLimit = 209715200;
                options.ValueCountLimit = int.MaxValue;
            });

            // ModelBinding筆數上限
            services.AddMvc(options =>
            {
                options.MaxModelBindingCollectionSize = int.MaxValue;
            });

            services.AddMvc().AddMvcOptions(options =>
            {
                options.MaxModelValidationErrors = 999999;
            });

            var config = Configuration.Get<VirtualPathConfig>().VirtualPath;
            var fileServerOptions = new List<FileServerOptions>();
            if (config != null)
            {
                config.ForEach(f =>
                {
                    try
                    {
                        fileServerOptions.Add(new FileServerOptions
                        {
                            FileProvider = new PhysicalFileProvider(@f.RealPath),
                            RequestPath = new PathString(f.RequestPath),
                        });
                    }
                    catch { }
                });
            };
            services.AddSingleton<IFileServerProvider>(new FileServerProvider(fileServerOptions));

            // CORS設定
            services.AddCors(options =>
                        options.AddPolicy("AMESPolicy",
                        p => p.AllowAnyOrigin().AllowAnyHeader().AllowAnyMethod()));


            services.AddLocalization(o =>
            {
                o.ResourcesPath = "Resources";
            });

            services.AddMvc()
                .AddViewLocalization(LanguageViewLocationExpanderFormat.Suffix)
                .AddDataAnnotationsLocalization(options =>
                {
                    options.DataAnnotationLocalizerProvider = (type, factory) => factory.Create(typeof(SharedResource));
                });

            services.AddControllersWithViews().AddRazorRuntimeCompilation();

            // Session設定
            services.AddSession();

            // 權限設定
            services.AddAuthentication(CookieAuthenticationDefaults.AuthenticationScheme)
              .AddCookie(CookieAuthenticationDefaults.AuthenticationScheme, options =>
              {
                  options.LoginPath = new PathString("/Login/Index");
                  options.LogoutPath = new PathString("/Login/Logout");
                  options.AccessDeniedPath = new PathString("/Home/Error");
                  options.Cookie.Name = "_AMESCookie";
                  options.SlidingExpiration = true;
                  options.Cookie.HttpOnly = true;
              });

            // HttpClient設定
            var types = typeof(Startup).Assembly.GetTypes()
                        .Where(type => type.IsInterface
                        && ((System.Reflection.TypeInfo)type).ImplementedInterfaces != null
                        && type.GetInterfaces().Any(a => a.FullName == typeof(IHttpApi).FullName));
            foreach (var type in types)
            {
                // 設定呼叫API 等待10分鐘
                services.AddHttpApi(type).ConfigureHttpClient(o => { o.Timeout = TimeSpan.FromMinutes(10); });
                services.ConfigureHttpApi(type, o =>
                {
                    o.HttpHost = new Uri(AppSetting.Setting.ApiUrl);
                });
            }

        }

        public void Configure(IApplicationBuilder app, IWebHostEnvironment env, IFileServerProvider fileServerprovider)
        {
            if (env.IsDevelopment())
            {
                app.UseDeveloperExceptionPage();
            }
            else
            {
                app.UseExceptionHandler("/Home/Error");
                app.UseHsts();
            }

            app.UseCors("AMESPolicy");

            app.UseStaticFiles();

            IList<CultureInfo> supportedCultures = new List<CultureInfo>
            {
                new CultureInfo("en-US"),
                new CultureInfo("zh-CN"),
                new CultureInfo("zh-TW")
            };

            app.UseRequestLocalization(new RequestLocalizationOptions
            {
                DefaultRequestCulture = new RequestCulture("en-US"),
                SupportedCultures = supportedCultures,
                SupportedUICultures = supportedCultures
            });

            app.UseRouting();
            app.UseAuthorization();
            app.UseAuthentication();
            app.UseSession();

            // VersionCode設定值
            app.Use(async (context, next) =>
            {
                var currentVersion = Configuration["VersionCode"];
                var webVersion = context.Request.Cookies["VersionCode"];
                if (string.IsNullOrEmpty(context.Request.Cookies["VersionCode"]))
                {
                    context.Response.Cookies.Append("VersionCode", currentVersion);
                }
                else 
                {
                    if ( webVersion != currentVersion) 
                    {
                        context.Response.ContentType = "text/html; charset=utf-8";
                        await context.Response.WriteAsync("AMES版本已經更新!!<br>1. 請先關閉所有已經打開的網頁頁籤<br>2. 再重新打開AMES網頁");
                    }
                
                }

                await next.Invoke();
            });

            app.UseEndpoints(endpoints =>
            {
                endpoints.MapControllerRoute(
                    name: "default",
                    pattern: "{controller=Login}/{action=Index}/{id?}");
            });

            app.UseCookiePolicy();

            // 檔案目錄
            app.UseFileServerProvider(fileServerprovider);

        }
    }
}