using ExportMap.cs;
using ExportMap.Models;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Net;
using System.Net.Http;
using System.Threading.Tasks;
using System.Web.Http;

namespace ExportMap.Controllers
{
    public class UploadController : ApiController
    {
        [HttpPost]
        public Task<IEnumerable<FileDesc>> Post([FromUri]string path)
        {
            //string root = HttpContext.Current.Server.MapPath("~/uploads");
            if (string.IsNullOrEmpty(path)) return null;
            string root = Path.Combine(Tools.GetSetting("tempFolder"), path);
            if (!Directory.Exists(root)) Directory.CreateDirectory(root);

            if (!Request.Content.IsMimeMultipartContent())
            {
                throw new HttpResponseException(Request.CreateResponse(HttpStatusCode.NotAcceptable, "请求的格式不正确！"));
            }

            var provider = new CustomMultipartFormDataStreamProvider(root);
            var task = Request.Content.ReadAsMultipartAsync(provider).ContinueWith<IEnumerable<FileDesc>>(t =>
            {
                if (t.IsFaulted || t.IsCanceled)
                {
                    throw new HttpResponseException(HttpStatusCode.InternalServerError);
                }

                var fileInfos = provider.FileData.Select(i =>
                {
                    FileInfo info = new FileInfo(i.LocalFileName);

                    return new FileDesc(info.Name, info.Length);
                });

                return fileInfos;
            });

            return task;
        }
    }
}