using Muchinfo.PC.Common.Helpers;
using Muchinfo.MTPClient.Infrastructure.Utilities;
using System;
using System.IO;
using System.Net;
using System.Xml;

namespace Muchinfo.MTPClient.Infrastructure.Helpers
{
    public class VersionManager
    {
        readonly XmlDocument serverXmlDoc = new XmlDocument();
        private string _folderName = ApplicationParameter.UpdateFolderName;
        public string FolderName
        {
            get
            {
                return _folderName;
            }
        }
        public string GetServerVersion()
        {
            string newVersion = string.Empty;
            try
            {
                string configPath = GetConfigPath();
                XmlDocument doc = new XmlDocument();
                doc.Load(configPath);
                XmlNode versionNode = doc.SelectSingleNode("UpdateInfo/Version");
                if (versionNode != null)
                {
                    newVersion = versionNode.InnerText;
                }
            }
            catch (Exception ex)
            {
                LogHelper.WriteError(typeof(VersionManager), ex.ToString());
            }
            return newVersion;
        }


        private string GetConfigPath()
        {
            string remoteUpdateFolder = ApplicationParameter.UpdateAddress;
            string configPath = string.Empty;
            if (remoteUpdateFolder.EndsWith("/"))
            {
                configPath = string.Format("{0}UpdateConfig.xml", remoteUpdateFolder);
            }
            else
            {
                configPath = string.Format("{0}/UpdateConfig.xml", remoteUpdateFolder);
            }
            return configPath;
        }
        public bool NeedUpdateResource(string memberCode)
        {
            bool needUpdateResource = false;
            if (DateTime.Compare(GetServerModifyTime(memberCode), DateTime.MinValue) > 0)
            {
                if (DateTime.Compare(GetServerModifyTime(memberCode), GetLocalModifyTime()) > 0)
                {
                    needUpdateResource = true;
                }
                else
                {
                    needUpdateResource = false;
                }
            }
            else
            {
                needUpdateResource = false;
            }

            return needUpdateResource;
        }


        private DateTime GetServerModifyTime(string memberCode)
        {
            DateTime serverModifyTime = DateTime.MaxValue;
            try
            {
                string configPath = GetServerModifyConfigPath(memberCode);
                if (configPath != null && configPath != "")
                {
                    serverXmlDoc.Load(configPath);
                    XmlNode timeNode = serverXmlDoc.SelectSingleNode("UpdateInfo/LastModifyTime");
                    if (timeNode != null)
                    {
                        string dateTimeString = timeNode.InnerText;
                        if (!DateTime.TryParse(dateTimeString, out serverModifyTime))
                        {
                            serverModifyTime = DateTime.MinValue;
                        }
                    }
                }
                else
                {
                    serverModifyTime = DateTime.MinValue;
                }

            }
            catch (Exception ex)
            {
                serverModifyTime = DateTime.MinValue;
                LogHelper.WriteError(typeof(VersionManager), ex.ToString());
            }
            return serverModifyTime;
        }
        public void SaveXmlToLocal()
        {
            string localConfigFolder = Path.Combine(UserManager.SysConfigFolderPath, _folderName);
            string localConfigFile = Path.Combine(localConfigFolder, "MemberConfig.xml");
            try
            {
                if (!Directory.Exists(localConfigFolder))
                {
                    Directory.CreateDirectory(localConfigFolder);
                }
                if (File.Exists(localConfigFile))
                {
                    File.Delete(localConfigFile);
                }
                serverXmlDoc.Save(localConfigFile);
            }
            catch (Exception ex)
            {
                throw ex;
            }
        }
        private string GetServerModifyConfigPath(string memberCode)
        {
            string memberConfigFolder = ApplicationParameter.UpdateAddress;
            string configPath = string.Empty;
            if (memberConfigFolder.EndsWith("/"))
            {
                if (RemoteFielExists(string.Format("{0}/MemberConfig.xml", memberConfigFolder + "Config/" + memberCode)))
                {
                    configPath = string.Format("{0}/MemberConfig.xml", memberConfigFolder + "Config/" + memberCode);
                    _folderName = memberCode;
                }
                else if (RemoteFielExists(string.Format("{0}/MemberConfig.xml", memberConfigFolder + "Config/" + ApplicationParameter.UpdateFolderName)))
                {
                    configPath = string.Format("{0}/MemberConfig.xml", memberConfigFolder + "Config/" + ApplicationParameter.UpdateFolderName);
                    _folderName = ApplicationParameter.UpdateFolderName;
                }
            }
            else
            {
                if (RemoteFielExists(string.Format("{0}/MemberConfig.xml", memberConfigFolder + "/Config/" + memberCode)))
                {
                    configPath = string.Format("{0}/MemberConfig.xml", memberConfigFolder + "/Config/" + memberCode);
                    _folderName = memberCode;
                }
                else if (RemoteFielExists(string.Format("{0}/MemberConfig.xml", memberConfigFolder + "/Config/" + ApplicationParameter.UpdateFolderName)))
                {
                    configPath = string.Format("{0}/MemberConfig.xml", memberConfigFolder + "/Config/" + ApplicationParameter.UpdateFolderName);
                    _folderName = ApplicationParameter.UpdateFolderName;
                }
            }
            return configPath;
        }
        private DateTime GetLocalModifyTime()
        {
            DateTime localModifyTime = DateTime.MinValue;
            string localConfigFolder = Path.Combine(UserManager.SysConfigFolderPath, _folderName);
            string localConfigFile = Path.Combine(localConfigFolder, "MemberConfig.xml");
            if (Directory.Exists(localConfigFolder))
            {
                if (File.Exists(localConfigFile))
                {
                    XmlDocument doc = new XmlDocument();
                    doc.Load(localConfigFile);
                    XmlNode timeNode = doc.SelectSingleNode("UpdateInfo/LastModifyTime");
                    if (timeNode != null)
                    {
                        string dateTimeString = timeNode.InnerText;
                        localModifyTime = DateTime.Parse(dateTimeString);
                    }
                    else
                    {
                        localModifyTime = DateTime.MinValue;
                    }
                }
            }
            else
            {
                localModifyTime = DateTime.MinValue;
            }
            return localModifyTime;
        }
        private bool RemoteFielExists(string remoteFileUri)
        {
            bool isExists = false;
            WebResponse response = null;
            try
            {
                WebRequest request = WebRequest.Create(remoteFileUri);
                request.Timeout = 3000;
                response = request.GetResponse();
                isExists = response == null ? false : true;
            }
            catch (Exception ex)
            {
                isExists = false;
            }
            finally
            {
                if (response != null)
                {
                    response.Close();
                }
            }
            return isExists;
        }
    }
}