using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Net;
using System.Text;
using IStation.Bimface;

namespace IStation
{
    /// <summary>
    /// AccessToken
    /// </summary>
    public sealed partial class BimfaceClient
    {
        //令牌请求地址
        private const string _accesstokenurl = @"https://api.bimface.com/oauth2/token";

        /// <summary>
        /// 获取AccessToken
        /// </summary>
        public  string GetAccessToken()
        {
            if (string.IsNullOrEmpty(_accesstoken) || _expiretime.ValidAccessTokenExpiration(DateTime.Now))
            {
               getAccessToken();
            }
            return _accesstoken;
        }

        //获取AccessToken，内部调用
        private void getAccessToken()
        {
            using(var httpClient=new HttpClient())
            {
                httpClient.DefaultRequestHeaders.Add("Method","Post");
                var keyValueHeader = new HttpHeaders().GetBasicAuthorHeader(_appkey, _appsecret);
                httpClient.DefaultRequestHeaders.Add(keyValueHeader.Key, keyValueHeader.Value);
                var response =  httpClient.PostAsync(_accesstokenurl,null).Result;
                response.EnsureSuccessStatusCode();
                var responsetext = response.Content.ReadAsStringAsync().Result;
                var result=JsonHelper.Json2Object<Result<AccessTokenResponse>>(responsetext);
                if (result.code != Constants.Success)
                {
                    throw new BimfaceException(result.code);
                }
                _accesstoken = result.data.token;
                _expiretime.SetAccessTokenExpireTime(result.data.expireTime);
            }
        }






    }

}