using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Mvc;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Threading.Tasks;
using Txgy.EWS.Server.ICommon;

namespace Txgy.EWS.Server.Start.Controllers
{
    [ApiController]
    public class ImageController : ControllerBase
    {
        IConfiguration _configuration;
        public ImageController(IConfiguration configuration)
        {
            _configuration = configuration;
        }
        [HttpGet("show/{img}")]
        public IActionResult GetImage([FromRoute(Name = "img")] string imgPath)
        {
            string rootPath = _configuration.Read("FileFolder");
            //获取图片的返回类型
            var contentTypDict = new Dictionary<string, string> {
                {"jpg","image/jpeg"},
                {"jpeg","image/jpeg"},
                {"jpe","image/jpeg"},
                {"png","image/png"},
                {"gif","image/gif"},
                {"ico","image/x-ico"},
                {"tif","image/tiff"},
                {"tiff","image/tiff"},
                {"fax","image/fax"},
                {"wbmp","image/nd.wap.wbmp"},
                {"rp","imagend.rn-realpix"}
            };
            var contentTypeStr = "image/jpeg";

            var imgTypeSplit = imgPath.Split('.');
            var imgType = imgTypeSplit[imgTypeSplit.Length - 1].ToLower();
            //未知的图片类型
            if (contentTypDict.ContainsKey(imgType))
            {
                contentTypeStr = contentTypDict[imgType];
            }

            string filePath = Path.Combine(rootPath, imgPath);
            //图片不存在
            if (!new FileInfo(filePath).Exists)
            {
                return NoContent();
            }
            //返回原图
            using (var sw = new FileStream(filePath, FileMode.Open, FileAccess.Read, FileShare.ReadWrite))
            {
                var bytes = new byte[sw.Length];
                sw.Read(bytes, 0, bytes.Length);
                sw.Close();
                return new FileContentResult(bytes, contentTypeStr);
            }
        }
    }
}