using learun.util;
using System;
using System.Collections.Generic;
using System.Text.RegularExpressions;
using System.Threading.Tasks;

namespace learun.wechat
{
	/// <summary>
	/// 版 本 EasyCode EC管理后台
	/// Copyright (c) 2019-present EC管理有限公司
	/// 创建人：tobin
	/// 日 期：2019.11.06
	/// 描 述：媒体获取
	/// </summary>
	public class MediaGet : OperationRequestBase<MediaGetResult, HttpGetFileRequest>
	{
		private string url = "https://qyapi.weixin.qq.com/cgi-bin/media/get?access_token=ACCESS_TOKEN&media_id={0}";

		/// <summary>
		///
		/// </summary>
		/// <returns></returns>
		protected override string Url()
		{
			return string.Format(url, media_id);
		}

		/// <summary>
		/// 媒体文件id
		/// </summary>
		/// <returns></returns>
		[IsNotNull]
		public string media_id { get; set; }

		/// <summary>
		/// 图片保存路径
		/// </summary>
		/// <returns></returns>
		[IsNotNull]
		public string path { get; set; }

		/// <summary>
		///
		/// </summary>
		/// <param name="httpSend"></param>
		/// <param name="url"></param>
		/// <returns></returns>
		protected override Task<string> HttpSend(IHttpSend httpSend, string url)
		{
			return httpSend.Send(url, path);
		}

		/// <summary>
		///
		/// </summary>
		/// <param name="result"></param>
		/// <returns></returns>
		protected override MediaGetResult GetDeserializeObject(string result)
		{
			if (string.IsNullOrEmpty(path))
			{
				path = "d:\\";
			}

			try
			{
				var re = base.GetDeserializeObject(result);

				if (re != null && re.errcode != 0)
				{
					return re;
				}
			}
			catch (Exception)
			{
			}

			var header = result.ToObject<Dictionary<string, string>>();

			Regex regImg = new Regex("\"(?<fileName>.*)\"", RegexOptions.IgnoreCase);

			MatchCollection matches = regImg.Matches(header["Content-disposition"]);

			string fileName = matches[0].Groups["fileName"].Value;

			string filepath = path.TrimEnd('\\') + "\\" + fileName;

			return new MediaGetResult()
			{
				errcode = 0,
				errmsg = "",
				FilePath = filepath,
				FileName = fileName,
				FileType = header["Content-Type"]
			};
		}
	}
}