using System;
using System.Collections.Generic;
using System.IO;
using System.Security.Claims;
using System.Text;
using System.Text.Encodings.Web;
using System.Text.Unicode;
using HaBookCms.Common.LogHelper;
using HaBookCms.ContextConfig.Exceptions;
using HaBookCms.Jwt.Filter;
using HaBookCms.Jwt.Model;
using HaBookCms.RedisStorage.Cache;
using log4net;
using log4net.Config;
using log4net.Repository;
using Microsoft.AspNetCore.Authentication.Cookies;
using Microsoft.AspNetCore.Authentication.JwtBearer;
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.HttpOverrides;
using Microsoft.AspNetCore.Mvc;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Logging;
using Microsoft.IdentityModel.Tokens;

namespace HaBookCms.Admin
{
    public class Startup
    {
        /// <summary>
        /// log4net 仓储库
        /// </summary>
        public static ILoggerRepository repository { get; set; }

        public Startup(IConfiguration configuration, IHostingEnvironment env)
        {
            Configuration = configuration;
            var builder = new ConfigurationBuilder()
                .SetBasePath(env.ContentRootPath)
                .AddJsonFile("appsettings.json", optional: true, reloadOnChange: true);
            this.Configuration = builder.Build();
            //log4net
            repository = LogManager.CreateRepository("HaBookCms");
            //指定配置文件
            XmlConfigurator.Configure(repository, new FileInfo("Log4net.config"));
            BaseConfigModel.SetBaseConfig(Configuration, env.ContentRootPath, env.WebRootPath);
        }

        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);
            //解决视图输出内容中文编码问题
            services.AddSingleton(HtmlEncoder.Create(UnicodeRanges.All));
            services.AddSingleton<IHttpContextAccessor, HttpContextAccessor>();
            #region 认证
            JwtAuthConfigModel jwtConfig = new JwtAuthConfigModel();
            // services.AddAuthentication(CookieAuthenticationDefaults.AuthenticationScheme)
            //.AddCookie(CookieAuthenticationDefaults.AuthenticationScheme, o =>
            // {
            //     o.LoginPath = new PathString("/api/Users/checkLogin");
            // })
            services.AddAuthentication(JwtBearerDefaults.AuthenticationScheme)
             .AddJwtBearer(JwtBearerDefaults.AuthenticationScheme, o =>
             {
               
                 o.TokenValidationParameters = new TokenValidationParameters
                 {
                     ValidIssuer = jwtConfig.Issuer,
                     ValidAudience = jwtConfig.Audience,
                     IssuerSigningKey = new SymmetricSecurityKey(Encoding.ASCII.GetBytes(jwtConfig.JWTSecretKey)),

                     /***********************************TokenValidationParameters的参数默认值***********************************/
                     RequireSignedTokens = true,
                     // SaveSigninToken = false,
                     // ValidateActor = false,
                     // 将下面两个参数设置为false，可以不验证Issuer和Audience，但是不建议这样做。
                     ValidateAudience = true,
                     ValidateIssuer = true,
                     ValidateIssuerSigningKey = true,
                     // 是否要求Token的Claims中必须包含 Expires
                     RequireExpirationTime = true,
                     // 允许的服务器时间偏移量
                     // ClockSkew = TimeSpan.FromSeconds(300),
                     ClockSkew = TimeSpan.Zero,
                     // 是否验证Token有效期，使用当前时间与Token的Claims中的NotBefore和Expires对比
                     ValidateLifetime = true
                 };
             });
            #endregion
            var signingCredentials = new SigningCredentials(new SymmetricSecurityKey(Encoding.ASCII.GetBytes(jwtConfig.JWTSecretKey)), SecurityAlgorithms.HmacSha256);
            // 如果要数据库动态绑定，这里先留个空，后边处理器里动态赋值
            var permission = new List<Permission>();

            // 角色与接口的权限要求参数
            var permissionRequirement = new PermissionRequirement(
                "/api/denied",// 拒绝授权的跳转地址（目前无用）
                permission,
                ClaimTypes.Role,//基于角色的授权
                jwtConfig.Issuer,//发行人
                jwtConfig.Audience,//听众
                signingCredentials,//签名凭据
                expiration: TimeSpan.FromSeconds(60 * 2)//接口的过期时间
                );

            #region 授权
            services.AddAuthorization(options =>
            {
                options.AddPolicy("RequireApp", policy => policy.RequireRole("App").Build());
                options.AddPolicy("RequireAdmin", policy => policy.RequireRole("Admin").Build());
                options.AddPolicy("RequireAdminOrApp", policy => policy.RequireRole("Admin,App").Build());
                // 自定义权限要求
                options.AddPolicy("Permission",
                         policy => policy.Requirements.Add(permissionRequirement));
            });
            #endregion

          

            //log日志注入
            services.AddSingleton<ILoggerHelper, LogHelper>();


            #region 缓存 读取配置是否使用哪种缓存模式
            services.AddMemoryCache();
            if (Convert.ToBoolean(Configuration["Cache:IsUseRedis"]))
            {
                services.AddSingleton<ICacheService, RedisCacheService>();
            }
            else
            {
                services.AddSingleton<ICacheService, MemoryCacheService>();
            }
            #endregion

            #region 缓存 RedisCache
            //将Redis分布式缓存服务添加到服务中
            services.AddDistributedRedisCache(options =>
            {
                //用于连接Redis的配置 
                options.Configuration = "localhost";// Configuration.GetConnectionString("RedisConnectionString");
                //Redis实例名RedisDistributedCache
                options.InstanceName = "RedisInstance";
            });
            #endregion

            #region CORS
            services.AddCors(c =>
            {
                c.AddPolicy("Any", policy =>
                {
                    policy.AllowAnyOrigin()
                    .AllowAnyMethod()
                    .AllowAnyHeader()
                    .AllowCredentials();
                });

                c.AddPolicy("Limit", policy =>
                {
                    policy
                    .WithOrigins("localhost:63969")
                    .WithMethods("get", "post", "put", "delete")
                    //.WithHeaders("Authorization");
                    .AllowAnyHeader();
                });
            });
            #endregion

            #region 性能 压缩
            services.AddResponseCompression();
            #endregion
        }

        // 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();
            }
            #region 解决Ubuntu Nginx 代理不能获取IP问题
            app.UseForwardedHeaders(new ForwardedHeadersOptions
            {
                ForwardedHeaders = ForwardedHeaders.XForwardedFor | ForwardedHeaders.XForwardedProto
            });
            #endregion
            app.UseHttpsRedirection();
            app.UseStaticFiles(new StaticFileOptions
            {
                ServeUnknownFileTypes = true
                //ContentTypeProvider = new FileExtensionContentTypeProvider(new Dictionary<string, string>
                //{
                //  { ".apk","application/vnd.android.package-archive"},
                //  { ".nupkg","application/zip"}
                //})  //支持特殊文件下载处理
            });
            //自定义异常处理
            app.UseMiddleware<ExceptionFilter>();
            //认证
            app.UseAuthentication();
            //授权
            app.UseMiddleware<JwtAuthorizationFilter>();

            //性能压缩
            app.UseResponseCompression();


            app.UseCookiePolicy();

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