using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Net.Mail;
using System.Configuration;
using Bowin.Common.Utility;
using LumiSoft.Net.POP3.Client;
using LumiSoft.Net.Mail;
using LumiSoft.Net.SMTP.Client;
using LumiSoft.Net.AUTH;
using LumiSoft.Net.MIME;
using System.IO; 

namespace Bowin.Common.Mail
{
    public class MailHelper
    {
        private static string smtpHost = ConfigurationManager.AppSettings["Mail_SMTPServer"];
        private static int? smtpPort = ConfigurationManager.AppSettings["Mail_SMTPPort"].ParseStrTo<int>();
        private static bool? smtpIsSSL = ConfigurationManager.AppSettings["Mail_SMTPIsSSL"].ParseStrTo<bool>();
        private static string popHost = ConfigurationManager.AppSettings["Mail_Pop3Server"];
        private static int? popPort = ConfigurationManager.AppSettings["Mail_Pop3Port"].ParseStrTo<int>();
        private static bool? popIsSSL = ConfigurationManager.AppSettings["Mail_Pop3IsSSL"].ParseStrTo<bool>();
        private static string userName = ConfigurationManager.AppSettings["Mail_UserName"];
        private static string password = ConfigurationManager.AppSettings["Mail_Password"];

        private const int _DEFAULT_SMTP_PORT = 25;
        private const int _DEFAULT_POP3_PORT = 110;

        private static string GetSenderEmail()
        {
            string hostName = smtpHost.Substring(smtpHost.IndexOf('.') + 1);
            return userName + "@" + hostName;
        }

        public static void SendMail(string receiver, string title, string content)
        {
            if (string.IsNullOrEmpty(smtpHost))
            {
                throw new SendMailException("请指定发送邮件的STMP服务器地址。");
            }
            if (!smtpPort.HasValue)
            {
                smtpPort = _DEFAULT_SMTP_PORT;
            }
            if (!smtpIsSSL.HasValue)
            {
                smtpIsSSL = false;
            }
            if (string.IsNullOrEmpty(userName) || string.IsNullOrEmpty(password))
            {
                throw new SendMailException("请指定发送邮件的账号和密码。");
            }

            //try
            //{
            //    string sender = GetSenderEmail();
            //    using (SMTP_Client client = new SMTP_Client())
            //    {
            //        var authInfo = new AUTH_SASL_Client_Plain(userName, password);
            //        client.Connect(smtpHost, smtpPort.Value, smtpIsSSL.Value);
            //        client.Auth(authInfo);
            //        Mail_Message message = new Mail_Message();
            //        message.From = new Mail_t_MailboxList();
            //        message.From.Add(new Mail_t_Mailbox(sender, sender));
            //        message.To = new Mail_t_AddressList();
            //        message.To.Add(new Mail_t_Mailbox(receiver, receiver));
            //        message.Subject = title;
            //        //--- multipart/mixed -----------------------------------
            //        MIME_h_ContentType contentType_multipartMixed = new MIME_h_ContentType(MIME_MediaTypes.Multipart.mixed);
            //        contentType_multipartMixed.Param_Boundary = Guid.NewGuid().ToString().Replace('-', '.');
            //        MIME_b_MultipartMixed multipartMixed = new MIME_b_MultipartMixed(contentType_multipartMixed);
            //        message.Body = multipartMixed;

            //        //--- multipart/alternative -----------------------------
            //        MIME_Entity entity_multipartAlternative = new MIME_Entity();
            //        MIME_h_ContentType contentType_multipartAlternative = new MIME_h_ContentType(MIME_MediaTypes.Multipart.alternative);
            //        contentType_multipartAlternative.Param_Boundary = Guid.NewGuid().ToString().Replace('-', '.');
            //        MIME_b_MultipartAlternative multipartAlternative = new MIME_b_MultipartAlternative(contentType_multipartAlternative);
            //        entity_multipartAlternative.Body = multipartAlternative;
            //        multipartMixed.BodyParts.Add(entity_multipartAlternative);

            //        //--- text/plain ----------------------------------------
            //        MIME_Entity entity_text_plain = new MIME_Entity();
            //        MIME_b_Text text_plain = new MIME_b_Text(MIME_MediaTypes.Text.plain);
            //        entity_text_plain.Body = text_plain;

            //        //普通文本邮件内容，如果对方的收件客户端不支持HTML，这是必需的
            //        string plainTextBody = "如果你邮件客户端不支持HTML格式，或者你切换到“普通文本”视图，将看到此内容";

            //        text_plain.SetText(MIME_TransferEncodings.QuotedPrintable, Encoding.UTF8, plainTextBody);
            //        multipartAlternative.BodyParts.Add(entity_text_plain);

            //        //--- text/html -----------------------------------------
            //        string htmlText = content;//"<html>这是一份测试邮件，<img src=\"cid:test.jpg\">来自<font color=red><b>LumiSoft.Net</b></font></html>";
            //        MIME_Entity entity_text_html = new MIME_Entity();
            //        MIME_b_Text text_html = new MIME_b_Text(MIME_MediaTypes.Text.html);
            //        entity_text_html.Body = text_html;
            //        text_html.SetText(MIME_TransferEncodings.QuotedPrintable, Encoding.UTF8, htmlText);
            //        multipartAlternative.BodyParts.Add(entity_text_html);

            //        using (MemoryStream stream = new MemoryStream())
            //        {
            //            message.ToStream(stream, new MIME_Encoding_EncodedWord(MIME_EncodedWordEncoding.Q, Encoding.UTF8), Encoding.UTF8);
            //            stream.Position = 0;
            //            client.SendMessage(stream);
            //        }
            //        if (message != null)
            //        {
            //            message.Dispose();
            //        }

            //        client.Disconnect();
            //    }
            //}
            //catch (Exception ex)
            //{
            //    throw new SendMailException("邮件发送失败，详情请参考InnerException", ex);
            //}

            MailMessage message = new MailMessage();
            message.From = new MailAddress(GetSenderEmail());
            message.To.Add(receiver);
            message.Subject = title;
            message.IsBodyHtml = true;
            message.Body = content;

            SmtpClient client = new SmtpClient(smtpHost, smtpPort.Value);
            client.EnableSsl = smtpIsSSL.Value;
            client.Credentials = new System.Net.NetworkCredential(userName, password);
            try
            {
                client.Send(message);
            }
            catch (Exception ex)
            {
                throw new SendMailException("邮件发送失败，详情请参考InnerException", ex);
            }
        }

        public static List<Mail_Message> ReceiveMail(string mailAddress)
        {
            if (string.IsNullOrEmpty(popHost))
            {
                throw new SendMailException("请指定发送邮件的POP3服务器地址。");
            }
            if (!popPort.HasValue)
            {
                popPort = _DEFAULT_POP3_PORT;
            }
            if (!popIsSSL.HasValue)
            {
                popIsSSL = false;
            }
            if (string.IsNullOrEmpty(userName) || string.IsNullOrEmpty(password))
            {
                throw new SendMailException("请指定接收邮件的账号和密码。");
            }
            List<Mail_Message> mailList = new List<Mail_Message>();
            using (POP3_Client client = new POP3_Client())
            {
                client.Connect(popHost, popPort.Value, popIsSSL.Value);
                client.Login(userName, password);
                POP3_ClientMessageCollection coll = client.Messages;
                for (int i = 0; i < coll.Count; i++)
                {
                    POP3_ClientMessage message = coll[i];
                    Mail_Message mm = Mail_Message.ParseFromByte(coll[i].MessageToByte());
                    mailList.Add(mm);
                }
            }
            return mailList; 
        }
    }
}