using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Pcb.Common
{
   public class WeiXinOAuth
    {
        /// <summary>
        /// 获取微信Code
        /// </summary>
        /// <param name="appId">微信AppId</param>
        /// <param name="appSecret">微信AppSecret</param>
        /// <param name="redirectUrl">返回的登录地址，要进行Server.Un编码</param>
        /// <param name="isWap">true=微信内部登录 false=pc网页登录</param>
        public string GetWeiXinCode(string appId, string appSecret, string redirectUrl, bool isWap)
        {
            var r = new Random();
            //微信登录授权
            //string url = "https://open.weixin.qq.com/connect/qrconnect?appid=" + appId + "&redirect_uri=" + redirectUrl +"&response_type=code&scope=snsapi_login&state=STATE#wechat_redirect";
            //微信OpenId授权
            //string url = "https://open.weixin.qq.com/connect/oauth2/authorize?appid=" + appId + "&redirect_uri=" + redirectUrl +"&response_type=code&scope=snsapi_login&state=STATE#wechat_redirect";
            //微信用户信息授权
            var url = "";
            if (isWap)
            {
                url = "https://open.weixin.qq.com/connect/oauth2/authorize?appid=" + appId + "&redirect_uri=" +
                      redirectUrl + "&response_type=code&scope=snsapi_userinfo&state=STATE1811&connect_redirect=1#wechat_redirect";
            }
            else
            {
                url = "https://open.weixin.qq.com/connect/qrconnect?appid=" + appId + "&redirect_uri=" + redirectUrl +
                      "&response_type=code&scope=snsapi_login&state=STATE1811#wechat_redirect";
            }
            return url;
        }
        /// <summary>
        /// 通过code获取access_token
        /// </summary>
        /// <param name="appId"></param>
        /// <param name="appSecret"></param>
        /// <param name="code"></param>
        /// <returns></returns>
        public WeiXinAccessTokenResult GetWeiXinAccessToken(string appId, string appSecret, string code)
        {
            string url = "https://api.weixin.qq.com/sns/oauth2/access_token?appid=" + appId + "&secret=" + appSecret +
              "&code=" + code + "&grant_type=authorization_code";
            string jsonStr =new CaptureHelper().GetHtml(url,60*1000, Encoding.UTF8);
          
            var result = new WeiXinAccessTokenResult();
            if (jsonStr.Contains("errcode"))
            {
                var errorResult = JsonHelper.DeserializeObject<WeiXinHelper.WeiXinErrorMsg>(jsonStr);
                result.ErrorResult = errorResult;
                result.Result = false;
            }
            else
            {
                var model = JsonHelper.DeserializeObject<WeiXinAccessTokenModel>(jsonStr);
                result.SuccessResult = model;
                result.Result = true;
            }
            return result;
        }
        /// <summary>
        /// 拉取用户信息
        /// </summary>
        /// <param name="accessToken"></param>
        /// <param name="openId"></param>
        /// <returns></returns>
        public WeiXinHelper.WeiXinUserInfoResult GetWeiXinUserInfo(string accessToken, string openId)
        {
            string url = "https://api.weixin.qq.com/sns/userinfo?access_token=" + accessToken + "&openid=" + openId + "⟨=zh_CN";
            string jsonStr = new CaptureHelper().GetHtml(url, Encoding.UTF8);
         
            var result = new WeiXinHelper.WeiXinUserInfoResult();
            if (jsonStr.Contains("errcode"))
            {
                var errorResult = JsonHelper.DeserializeObject<WeiXinHelper.WeiXinErrorMsg>(jsonStr);
                result.ErrorMsg = errorResult;
                result.Result = false;
            }
            else
            {
                var userInfo = JsonHelper.DeserializeObject<WeiXinHelper.WeiXinUserInfo>(jsonStr);
                result.UserInfo = userInfo;
                result.Result = true;
            }
            return result;
        }

        /// <summary>
        /// 通过code获取access_token 请求成功的实体
        /// </summary>
        public class WeiXinAccessTokenModel
        {
            /// <summary>
            /// 接口调用凭证
            /// </summary>
            public string access_token { get; set; }
            /// <summary>
            /// access_token接口调用凭证超时时间，单位（秒）
            /// </summary>
            public int expires_in { get; set; }
            /// <summary>
            /// 用户刷新access_token
            /// </summary>
            public string refresh_token { get; set; }
            /// <summary>
            /// 授权用户唯一标识
            /// </summary>
            public string openid { get; set; }
            /// <summary>
            /// 用户授权的作用域，使用逗号（,）分隔
            /// </summary>
            public string scope { get; set; }
        }

        public class WeiXinAccessTokenResult
        {
            public WeiXinAccessTokenModel SuccessResult { get; set; }
            public bool Result { get; set; }

            public WeiXinHelper.WeiXinErrorMsg ErrorResult { get; set; }
        }
    }
}