using LitJson;
using System;
using System.Collections.Generic;
using System.Data;
using System.Linq;
using System.Web;
using WxPayAPI;

namespace LeaRun.Application.Web.Common
{
    public class GetAccessToken
    {

        #region 获取Access_Token
        public static String GetAcces_token()
        {
            //变量定义区
            long timeOut = 0;
            //token
            String acccess_Token = "";
            //超时时间
            long time = 0;
            //1查询数据库
            String sql = "Select AccessToken,Time,AppId,Secret from BCS_WxAccessToken ";

            DataTable dt = SqlHelper.ExecuteDataTable(sql, CommandType.Text, null);

            //1.1判断是否有数据
            if (dt.Rows.Count > 0)
            {

                //1.1.2 有数据判断时间是否超时
                if (dt.Rows[0]["Time"].ToString() == "" || dt.Rows[0]["AccessToken"].ToString() == "")
                {

                    String token = GetToken(dt.Rows[0]["AppId"].ToString(), dt.Rows[0]["Secret"].ToString());

                    acccess_Token = token.Split('|')[0];

                    timeOut = Convert.ToInt64(token.Split('|')[1].ToString());
                    //将token存入数据库
                    time = GetLongTime();
                    UpdateToken(acccess_Token, (time + timeOut).ToString(), dt.Rows[0]["AppId"].ToString());
                }
                else
                {
                    timeOut = Convert.ToInt64(dt.Rows[0]["Time"].ToString());
                    //获取时间戳
                    time = GetLongTime();
                    if (timeOut > time)
                    {
                        //没有超时则取出来使用
                        acccess_Token = dt.Rows[0]["AccessToken"].ToString();
                    }
                    else
                    {
                        //时间超时获取最新的Access_token,并更新数据库中的token和超时时间
                        String token = GetToken(dt.Rows[0]["AppId"].ToString(), dt.Rows[0]["Secret"].ToString());
                        acccess_Token = token.Split('|')[0];
                        timeOut = Convert.ToInt64(token.Split('|')[1].ToString());
                        //更新token
                        time = GetLongTime();
                        UpdateToken(acccess_Token, (time + timeOut).ToString(), dt.Rows[0]["AppId"].ToString());
                    }
                }

            }
            else
            {
                //1.1.1 没有数据执行Insert
                String token = GetToken(dt.Rows[0]["AppId"].ToString(), dt.Rows[0]["Secret"].ToString());
                acccess_Token = token.Split('|')[0];
                timeOut = Convert.ToInt64(token.Split('|')[1].ToString());
                //将token存入数据库
                time = GetLongTime();
                InsertToken(acccess_Token, (time + timeOut).ToString(), dt.Rows[0]["AppId"].ToString());
            }




            return acccess_Token;


        }

        private static long GetLongTime()
        {
            DateTime a = DateTime.Now;
            DateTime startTime = TimeZone.CurrentTimeZone.ToLocalTime(new DateTime(1970, 1, 1, 0, 0, 0, 0));
            long time = (long)(a - startTime).TotalSeconds;
            return time;
        }

        #endregion
        public static int UpdateToken(String token, String timeOut, String APPID)
        {
            String sql = "update BCS_WxAccessToken Set AccessToken = '" + token + "',time = '" + timeOut + "' where  AppId ='" + APPID + "'";//"insert into BCS_WxAccessToken (AccessToken,Time,AppId) values ('" + token + "'" + timeOut + "',"+WxPayConfig.APPID+")";
            return SqlHelper.ExecuteNonQuery(sql, CommandType.Text, null);


        }

        //将Token信息添加到数据库
        public static int InsertToken(String token, String timeOut, String APPID)
        {
            String sql = "insert into BCS_WxAccessToken (AccessToken,Time,AppId) values ('" + token + "'," + timeOut + ",'" + APPID + "')";
            return SqlHelper.ExecuteNonQuery(sql, CommandType.Text, null);


        }

        public static string GetToken(String APPID, String APPSECRET)
        {
            String access_token;
            long expires_in;

            //构造获取https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=wxdc0ee0e75b3c6188&secret=f878802a0a1ca973659deb62010ee4a4
            //WxPayData data = new WxPayData();
            //data.SetValue("grant_type", "client_credential");
            //data.SetValue("appid", APPID);
            //data.SetValue("secret", APPSECRET);
            String data =  "appid="+APPID+"&grant_type=client_credential&secret="+APPSECRET;
            string url = "https://api.weixin.qq.com/cgi-bin/token?" + data;
            //Log.Debug(this.GetType().ToString(), "陈新杰 : " + url);
            //请求url以获取数据
            string result = HttpService.Get(url);

            //Log.Debug("测试用：", "GetOpenidAndAccessTokenFromCode response : " + result);

            //保存access_token，用于收货地址获取
            JsonData jd = JsonMapper.ToObject(result);
            access_token = (string)jd["access_token"];
            expires_in = Convert.ToInt64(jd["expires_in"].ToString());//超时时间




            //data.SetValue("nickname", nickname);

            return access_token + "|" + expires_in;
        }


    }
}