using Gather.Common.Util;
using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Mvc;
using System.IO;

namespace GatherAPI.Controllers.back
{
    [Route("api/[controller]")]
    [ApiController]
    public class DownloadFileController : Controller
    {
        private readonly IWebHostEnvironment _webHostEnvironment;

        public DownloadFileController(IWebHostEnvironment webHostEnvironment)
        {
            _webHostEnvironment = webHostEnvironment;
        }

        /// <summary>
        /// 下载文件接口
        /// </summary>
        /// <param name="Path">文件路径</param>
        /// <returns></returns>
        [Authorize]
        [HttpGet]
        public ActionResult Index(string Path)
        {
            try
            {
                if (string.IsNullOrEmpty(Path))
                {
                    return Json(Tool.GetJsonWithCode(APICode.Fail, "路径不能为空"));
                }
                string web_path = _webHostEnvironment.WebRootPath;
                var filePath = web_path + "/" + Path;
                //以字符流的形式下载文件
                FileStream fs = new FileStream(filePath, System.IO.FileMode.Open);
                byte[] bytes = new byte[(int)fs.Length];
                fs.Read(bytes, 0, bytes.Length);
                fs.Close();
                string displayName = System.IO.Path.GetFileName(filePath);
                return File(bytes, "application/octet-stream", displayName);

            }
            catch (Exception ex)
            {
                Util.LogHelper.WriteLog(ex.Message + "，行号：" + ex.StackTrace);
                return Json(Tool.GetJsonWithCode(APICode.Fail, "发生错误，请联系管理员。"));
            }
        }
    }
}