using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Net.Mail;
using System.Web;
using System.Net;
using System.Text.RegularExpressions;
using System.Net.Sockets;
using System.IO;
using System.Collections;
using System.Threading;

namespace Com.Web
{
  /// <summary>
  /// 郵箱類
  /// </summary>
  public class CheckEmailInfo
  {
    public string server { get; set; }//服務(wù)器
    public string user { get; set; }//用戶名
    public string pwd { get; set; }//密碼
  }

  /// <summary>
  /// SendEmail通用類，通過smtp服務(wù)器發(fā)送郵件
  /// </summary>
  public class SendEmail
  {
    public Dictionary<string, string> smtpServer;
    public Dictionary<string, string> popServer;

    public SendEmail()
    {     
      IniSmtpServer();
      IniPopServer();
    }

    /// <summary>
    /// 初始化常用smtpServer，用于綁定下拉選擇菜單
    /// </summary>
    private void IniSmtpServer()
    {
      smtpServer = new Dictionary<string, string>();
      smtpServer.Add("網(wǎng)易163郵箱", "smtp.163.com");
      smtpServer.Add("網(wǎng)易vip.163郵箱", "smtp.vip.163.com");
      smtpServer.Add("網(wǎng)易126郵箱", "smtp.126.com");
      smtpServer.Add("網(wǎng)易188郵箱", "smtp.188.com");
      smtpServer.Add("新浪郵箱", "smtp.sina.com");
      smtpServer.Add("雅虎郵箱", "smtp.mail.yahoo.com");
      smtpServer.Add("搜狐郵箱", "smtp.sohu.com");
      smtpServer.Add("TOM郵箱", "smtp.tom.com");
      smtpServer.Add("Gmail郵箱", "smtp.gmail.com");
      smtpServer.Add("QQ郵箱", "smtp.qq.com");
      smtpServer.Add("QQ企業(yè)郵箱", "smtp.biz.mail.qq.com");
      smtpServer.Add("139郵箱", "smtp.139.com");
      smtpServer.Add("263郵箱", "smtp.263.com");      
    }

    /// <summary>
    /// 初始化常用popServer，用于綁定下拉選擇菜單
    /// </summary>
    private void IniPopServer()
    {
      popServer = new Dictionary<string, string>();
      popServer.Add("網(wǎng)易163郵箱", "pop3.163.com");
      popServer.Add("網(wǎng)易vip.163郵箱", "pop3.vip.163.com");
      popServer.Add("網(wǎng)易126郵箱", "pop3.126.com");
      popServer.Add("網(wǎng)易188郵箱", "pop3.188.com");
      popServer.Add("新浪郵箱", "pop3.sina.com");
      popServer.Add("雅虎郵箱", "pop3.mail.yahoo.com");
      popServer.Add("搜狐郵箱", "pop3.sohu.com");
      popServer.Add("TOM郵箱", "pop.tom.com");
      popServer.Add("Gmail郵箱", "pop.gmail.com");
      popServer.Add("QQ郵箱", "pop.qq.com");
      popServer.Add("QQ企業(yè)郵箱", "pop.biz.mail.qq.com");
      popServer.Add("139郵箱", "pop.139.com");
      popServer.Add("263郵箱", "pop.263.com");
    }

    /// <summary>
    /// 發(fā)送郵件功能
    /// </summary>
    /// <param name="fromEmail">登錄郵箱</param>
    /// <param name="password">登錄密碼</param>
    /// <param name="user">郵件昵稱</param>
    /// <param name="title">郵件標(biāo)題</param>
    /// <param name="toEmail">郵件地址</param>
    /// <param name="email">郵件內(nèi)容</param>
    /// <param name="smtpServer">smtp服務(wù)器</param>
    public bool SendMessage(string fromEmail,string password, string user, string title, string toEmail, string email,string smtpServer)
    {
      try
      {       
        SmtpClient smtp = new SmtpClient(); //實例化一個SmtpClient
        smtp.DeliveryMethod = SmtpDeliveryMethod.Network; //將smtp的出站方式設(shè)為 Network
        smtp.EnableSsl = false;//smtp服務(wù)器是否啟用SSL加密
        smtp.Host = smtpServer;//指定 smtp 服務(wù)器          
        smtp.Credentials = new NetworkCredential(fromEmail, password);
        MailMessage mm = new MailMessage(); //實例化一個郵件類
        mm.Priority = MailPriority.High; //郵件的優(yōu)先級，分為 Low, Normal, High，通常用 Normal即可       
        mm.From = new MailAddress(fromEmail, user, Encoding.GetEncoding(936));
        mm.CC.Add(new MailAddress(toEmail, "", Encoding.GetEncoding(936)));
        mm.Subject = title; //郵件標(biāo)題
        mm.SubjectEncoding = Encoding.GetEncoding(936);
        mm.IsBodyHtml = true; //郵件正文是否是HTML格式mm.BodyEncoding = Encoding.GetEncoding(936);
        mm.Body = email;
        smtp.Send(mm);
        return true;     
      }
      catch
      {
        return false;
      }
    }

    /// <summary>
    /// 檢查郵箱是否正確的委托
    /// </summary>
    delegate bool MyDelegate(object checkEmailInfo);

    /// <summary>
    /// 利用異步方式檢查郵箱賬號和密碼是否正確
    /// </summary>
    public bool CheckUser(string server, string user, string pwd)
    {      
      MyDelegate myDelegate = new MyDelegate(CheckUser);
      CheckEmailInfo checkEmailInfo = new CheckEmailInfo();
      checkEmailInfo.server = server;
      checkEmailInfo.user = user;
      checkEmailInfo.pwd = pwd;
      IAsyncResult result = myDelegate.BeginInvoke(checkEmailInfo, null, null);
      Thread.Sleep(1000);//主線程1秒后檢查異步線程是否運行完畢
      if (result.IsCompleted)
      { return myDelegate.EndInvoke(result); }//如果錯誤的郵箱和密碼，函數(shù)將會運行很慢
      else
      { return false; }
    }
   

    /// <summary>
    /// 判斷用戶郵箱賬號和密碼是否正確
    /// </summary>
    /// <param name="server">PopServer地址</param>
    /// <param name="user">用戶名</param>
    /// <param name="pwd">密碼</param>
    private bool CheckUser(object checkEmailInfo)
    {     
      CheckEmailInfo checkInfo = (CheckEmailInfo)checkEmailInfo;
      TcpClient sender = new TcpClient(checkInfo.server, 110);//pop協(xié)議使用TCP的110端口
      Byte[] outbytes;
      NetworkStream ns;
      StreamReader sr;
      string input;
      string readuser = string.Empty;
      string readpwd = string.Empty;
      try
      {
        ns = sender.GetStream();
        sr = new StreamReader(ns);
        sr.ReadLine();
        //檢查用戶名和密碼
        input = "user " + checkInfo.user+ "\r\n";
        outbytes = Encoding.ASCII.GetBytes(input.ToCharArray());
        ns.Write(outbytes, 0, outbytes.Length);       
        readuser = sr.ReadLine();
        input = "pass " + checkInfo.pwd + "\r\n";
        outbytes =Encoding.ASCII.GetBytes(input.ToCharArray());
        ns.Write(outbytes, 0, outbytes.Length);      
        readpwd = sr.ReadLine();              
        if (readuser.Substring(0, 3) == "+OK" && readpwd.Substring(0, 3) == "+OK")
        { return true; }
        else
        { return false; }
      }
      catch
      {
        return false;
      }
    }
    
    /// <summary>
    /// 判斷郵箱格式是否正確
    /// </summary>
    /// <param name="email">郵箱地址</param>
    public bool IsEmail(string email)
    { 
      string paterner = @"\w+([-+.']\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*";
      if (!Regex.IsMatch(email, paterner))
      { return false;}
      else
      {return true;}     
    } 
  }
}