using System;
using System.Collections.Generic;
using System.Xml;
using System.Web;
using Newtonsoft.Json;
using Newtonsoft.Json.Linq;
using ZcPeng.PublicLibrary;
using JCSoft.WX.Framework.Models.Requests;
using JCSoft.WX.Framework.Models;

namespace Common.Wechat
{
    /// <summary>
    /// RequestMessage：请求消息辅助类
    /// </summary>
    public class RequestMessageHelper
    {
        /// <summary>
        /// 将xml节点CDATA转换成json之后的键名
        /// </summary>
        private const string CDATA_KEY = "#cdata-section";

        ///// <summary>
        ///// HTTP请求
        ///// </summary>
        //private HttpRequest request;
        /// <summary>
        /// 请求消息
        /// </summary>
        private RequestMessage message;
        ///// <summary>
        ///// 加密类型
        ///// </summary>
        //private MessageEncryptTypeEnum encryptType;

        /// <summary>
        /// 获取是否有请求消息
        /// </summary>
        public bool HasRequestMessage
        {
            get
            {
                return message != null;
            }
        }

        /// <summary>
        /// 获取消息类型
        /// </summary>
        public MsgType MessageType
        {
            get
            {
                if (message != null)
                    return message.MsgType;
                else
                    throw new NotImplementedException("请求消息为空，无法获取消息类型。");
            }
        }

        /// <summary>
        /// 获取请求消息
        /// </summary>
        public RequestMessage Message
        {
            get
            {
                return message;
            }
        }

        /// <summary>
        /// 获取消息的加密类型
        /// </summary>
        //public MessageEncryptTypeEnum EncryptType
        //{
        //    get
        //    {
        //        return encryptType;
        //    }
        //}

        /// <summary>
        /// 构造函数
        /// </summary>
        /// <param name="request">HTTP请求</param>
        public RequestMessageHelper(string content,ref string resultMsg)
        {
                //获取消息加密类型
                //encryptType = GetEncryptType();
                //如果已加密，解密消息
                string rawContent;
                //if (encryptType == MessageEncryptTypeEnum.aes)
                //    rawContent = DecryptMessage(content);
                //else
                    rawContent = content;
                //解析消息
                if (!TryParse(rawContent, out message))
                {
                    //xrwang.weixin.PublicAccount.Message.Insert(new Message(xrwang.weixin.PublicAccount.MessageType.Exception,
                    //    string.Format("解析消息失败。\r\n地址：{0}\r\n未解密的消息：{1}\r\n解密之后的消息：{2}",
                    //    "request.RawUrl", content, rawContent)));
                }
                else
                {
                    //xrwang.weixin.PublicAccount.Message.Insert(new Message(xrwang.weixin.PublicAccount.MessageType.Exception,
                    //    string.Format("解析消息成功。\r\n地址：{0}\r\n未解密的消息：{1}\r\n解密之后的消息：{2}",
                    //    "request.RawUrl", content, message)));
                    switch (message.MsgType)
                    {
                        //当消息为文本时
                        case MsgType.Text:
                            RequestTextMessage textmsg = (RequestTextMessage)message;
                            if (textmsg.Content == "采购")
                            { 
                            int nowtime = ConvertDateTimeInt(DateTime.Now);
                            string msg = "欢迎关注亮健好药--供应商采购协同微信公众号：点击链接：http://119.27.191.247/web/supply/purchaseorder 查看采购需求。";
                            string resxml = "<xml><ToUserName><![CDATA[" 
                                + textmsg.FromUserName + "]]></ToUserName><FromUserName><![CDATA[" 
                                + textmsg.ToUserName + "]]></FromUserName><CreateTime>" 
                                + nowtime + "</CreateTime><MsgType><![CDATA[text]]></MsgType><Content><![CDATA[" 
                                + msg + "]]></Content><FuncFlag>0</FuncFlag></xml>";
                            resultMsg = resxml;
                            }
                            if (textmsg.Content == "供货")
                            { 
                            int nowtime = ConvertDateTimeInt(DateTime.Now);
                            string msg = "欢迎关注亮健好药--供应商采购协同微信公众号：点击链接：http://119.27.191.247/web/supply/index 填写供货。";
                            string resxml = "<xml><ToUserName><![CDATA[" 
                                + textmsg.FromUserName + "]]></ToUserName><FromUserName><![CDATA[" 
                                + textmsg.ToUserName + "]]></FromUserName><CreateTime>" 
                                + nowtime + "</CreateTime><MsgType><![CDATA[text]]></MsgType><Content><![CDATA[" 
                                + msg + "]]></Content><FuncFlag>0</FuncFlag></xml>";
                            resultMsg = resxml;
                            }
                            break;
                        case MsgType.Event:
                            RequestEventMessage eventmsg = (RequestEventMessage)message;
                            if (eventmsg.Event == Event.Subscribe)
                            {
                            //刚关注时的时间，用于欢迎词  
                            int nowtime = ConvertDateTimeInt(DateTime.Now);
                            string msg = "欢迎关注亮健好药--供应商采购协同微信公众号：点击链接：http://119.27.191.247/web/supply/purchaseorder 查看采购情况。";
                            string resxml = "<xml><ToUserName><![CDATA[" 
                                + eventmsg.FromUserName + "]]></ToUserName><FromUserName><![CDATA[" 
                                + eventmsg.ToUserName + "]]></FromUserName><CreateTime>" 
                                + nowtime + "</CreateTime><MsgType><![CDATA[text]]></MsgType><Content><![CDATA[" 
                                + msg + "]]></Content><FuncFlag>0</FuncFlag></xml>";
                            resultMsg = resxml;
                            }
                            break;
                        default:
                            break;
                }
            }
        }

        /// <summary>
        /// 得到消息加密类型
        /// </summary>
        /// <returns>返回消息加密类型</returns>
        //private MessageEncryptTypeEnum GetEncryptType()
        //{
        //    string encrypt_type = RequestEx.TryGetQueryString("encrypt_type", MessageEncryptTypeEnum.raw.ToString("g"), request);
        //    return (MessageEncryptTypeEnum)Enum.Parse(typeof(MessageEncryptTypeEnum), encrypt_type, true);
        //}

        /// <summary>
        /// 解密消息
        /// </summary>
        /// <returns>返回解密之后的消息</returns>
        //private string DecryptMessage(string content)
        //{
        //    string msg = "";
        //    XmlDocument doc = new XmlDocument();
        //    doc.LoadXml(content);
        //    XmlNode root = doc.FirstChild;
        //    string userName = root["ToUserName"].InnerText;
        //    AccountInfo account = AccountInfoCollection.GetAccountInfo(userName);
        //    if (account == null)
        //        return msg;
        //    Tencent.WXBizMsgCrypt wxcpt = new Tencent.WXBizMsgCrypt(account.Token, account.EncodingAESKey, account.AppId);
        //    string msg_signature = RequestEx.TryGetQueryString("msg_signature", "", request);
        //    string timestamp = RequestEx.TryGetQueryString("timestamp", "", request);
        //    string nonce = RequestEx.TryGetQueryString("nonce", "", request);
        //    wxcpt.DecryptMsg(msg_signature, timestamp, nonce, content, ref msg);
        //    return msg;
        //}

        /// <summary>
        /// 从xml字符串解析消息
        /// </summary>
        /// <param name="xml">xml字符串</param>
        /// <returns>返回消息</returns>
        public static RequestMessage Parse(string xml)
        {
            RequestMessage msg = null;
            //将xml字符串解析成JObject对象
            //XmlDocument doc = new XmlDocument();
            //doc.LoadXml(xml);

            XmlTextReader reader = new XmlTextReader(xml, XmlNodeType.Document, null);
            msg = RequestMessageFactory.CreateRequestMessage(reader);
            
            //返回
            return msg;
        }

        /// <summary>
        /// 尝试从xml字符串解析消息
        /// </summary>
        /// <param name="xml">xml字符串</param>
        /// <param name="msg">如果解析成功，返回消息；否则，返回null。</param>
        /// <returns>返回解析是否成功</returns>
        private static bool TryParse(string xml, out RequestMessage msg)
        {
            bool success = false;
            msg = null;
            try
            {
                msg = Parse(xml);
                success = true;
            }
            catch { }
            return success;
        }

        #region 将datetime.now 转换为 int类型的秒
        /// <summary>
        /// datetime转换为unixtime
        /// </summary>
        /// <param name="time"></param>
        /// <returns></returns>
        private int ConvertDateTimeInt(System.DateTime time)
        {
            //System.DateTime startTime = TimeZone.CurrentTimeZone.ToLocalTime(new System.DateTime(1970, 1, 1));
            System.DateTime startTime = TimeZoneInfo.ConvertTime(new System.DateTime(1970, 1, 1),TimeZoneInfo.Local);
            return (int)(time - startTime).TotalSeconds;
        }
        private int converDateTimeInt(System.DateTime time)
        {
            System.DateTime startTime = TimeZoneInfo.ConvertTime(new System.DateTime(1970, 1, 1),TimeZoneInfo.Local);
            return (int)(time - startTime).TotalSeconds;
        }
        #endregion
        
    }
    
}