using Microsoft.Owin;
using Microsoft.Owin.Hosting;
using Nancy.Hosting.Self;
using Owin;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Net.Http.Formatting;
using System.Text;
using System.Threading.Tasks;
using System.Web.Http;
using static System.Net.Mime.MediaTypeNames;

namespace 电子展板
{
    public class WebServer
    {
        private static bool UseNancy = false;
        private static NancyHost _host;
        private static IDisposable host;
        public static void Start()
        {
            if (UseNancy)
            {
                _host = new NancyHost(new Uri("http://localhost:80"));
                _host.Start();
            }
            else
            {
                StartOptions startOptions = new StartOptions();
                startOptions.Urls.Add($"http://*:80/");
                host = WebApp.Start<Startup>(startOptions);
            }
        }

        public static void Stop()
        {
            if (_host != null)
            {
                _host.Stop();
                _host.Dispose();
                _host = null;
            }
            if (host != null)
            {
                host.Dispose();
                host = null;
            }
        }
    }


    /// <summary>
    /// Web启动类
    /// </summary> 
    public class Startup
    {
        private HttpConfiguration _config;
        /// <summary>
        /// 配置
        /// </summary>
        /// <param name="app"></param>
        /// <param name="env"></param>
        public void Configuration(IAppBuilder app)
        {
            _config = new HttpConfiguration();
            _config.MapHttpAttributeRoutes();
            _config.Formatters.XmlFormatter.SupportedMediaTypes.Clear();
            _config.Formatters.JsonFormatter.MediaTypeMappings.Add(new QueryStringMapping("datatype", "json", "application/json"));
            //全局拦截
            app.Use<ResouceStaticRoute>("/static", "/Assets");
            app.UseWebApi(_config);
        }
    }

    public class ResouceStaticRoute : OwinMiddleware
    {
        private string route;
        private string resources;
        public ResouceStaticRoute(OwinMiddleware next, string route, string resources) : base(next)
        {
            this.route = route;
            this.resources = resources;
        }

        public override async Task Invoke(IOwinContext context)
        {
            try
            {
                string method = context.Request.Method;//GET POST
                string path = context.Request.Path.ToString();
                if (method.ToUpper() == "GET" && path.StartsWith(route))
                {
                    string resourePath = path.Replace(route, "");
                    string packUri = $"pack://application:,,,{resources}{resourePath}";
                    byte[] bytes = null;
                    using (Stream stream = System.Windows.Application.GetResourceStream(new Uri(packUri, UriKind.RelativeOrAbsolute)).Stream)
                    {
                        bytes = new byte[stream.Length];
                        stream.Read(bytes, 0, bytes.Length);
                    }

                    context.Response.ContentType = System.Web.MimeMapping.GetMimeMapping(path);
                    context.Response.Write(bytes, 0, bytes.Length);
                    await Task.FromResult(0);
                }
                await Next.Invoke(context);
            }
            catch (InvalidCastException ex)
            {
                await Next.Invoke(context);
            }
            catch (Exception ex)
            {
                await Next.Invoke(context);
            }
        }
    }
}