using MailKit.Security;
using MimeKit;
using MimeKit.Text;
using System;
using System.Collections.Generic;
using System.Configuration;
using System.Linq;
using System.Net.Mail;
using System.Text;
using System.Threading.Tasks;

namespace CK.SCP.Common
{

    public class MyWebSmtpMail
    {
        private MailMessage mailMessage;
        private SmtpClient smtpClient;
        private string from;
        private string server;
        private string username;
        private string password;
        private bool enablessl;
        private bool credentials;
        private int port;

        public MyWebSmtpMail()
        {
            string From = ConfigurationManager.AppSettings["MailSender"];
            string Server = ConfigurationManager.AppSettings["MailServer"];
            string UserName = ConfigurationManager.AppSettings["MailUserName"];
            string Password = ConfigurationManager.AppSettings["MailPassword"];
            int Port = Convert.ToInt32(ConfigurationManager.AppSettings["MailPort"]);

            this.from = From;
            this.server = Server;
            this.password = Password;
            this.username = UserName;
            this.enablessl = true;
            this.port = Port;
            this.credentials = false;
        }

        public void Send(string To, string Body, string Title)
        {
            mailMessage = new MailMessage();
            mailMessage.To.Add(To);
            mailMessage.From = new System.Net.Mail.MailAddress(this.from);
            mailMessage.Subject = Title;
            mailMessage.Body = Body;
            mailMessage.IsBodyHtml = true;
            mailMessage.BodyEncoding = System.Text.Encoding.UTF8;
            mailMessage.Priority = System.Net.Mail.MailPriority.Normal;

            if (mailMessage != null)
            {
                smtpClient = new SmtpClient();
                if (!credentials)
                {
                    smtpClient.Credentials = new System.Net.NetworkCredential(username, password);
                }
                smtpClient.DeliveryMethod = System.Net.Mail.SmtpDeliveryMethod.Network;
                smtpClient.Host = server;
                smtpClient.Port = port;
                smtpClient.EnableSsl = enablessl;
                //smtpClient.Send(mailMessage);
                //smtpClient.SendAsync(mailMessage, null);

                //如果服务器支持安全连接，则将安全连接设为true
                //smtpClient.EnableSsl = true;
                try
                {
                    //是否使用默认凭据，若为false，则使用自定义的证书，就是下面的networkCredential实例对象
                    smtpClient.UseDefaultCredentials = false;

                    //指定邮箱账号和密码,需要注意的是，这个密码是你在QQ邮箱设置里开启服务的时候给你的那个授权码
                    System.Net.NetworkCredential networkCredential = new System.Net.NetworkCredential(username, password);
                    smtpClient.Credentials = networkCredential;

                    //发送邮件
                    smtpClient.Send(mailMessage);

                }
                catch (System.Net.Mail.SmtpException ex)
                {                  
                    Console.WriteLine(ex.Message, "发送邮件出错");
                }
            }
        }
    }

    public class EmailAddress
    {
        public EmailAddress(string address, string name)
        {
            Address = address;
            Name = name;
        }
        public string Name { get; set; }
        public string Address { get; set; }
    }

    public class MailKitMailSender
    {
        private readonly MailKit.Net.Smtp.SmtpClient _client = new MailKit.Net.Smtp.SmtpClient();
        private MimeMessage _message = new MimeMessage();

        private string host;//邮箱服务器
        private int port;//端口
        private string from;//发送的邮箱
        private string password;//密码
        private bool enablessl;//是否ssl
        private string username;//发送名称

        private readonly SecureSocketOptions _secureSocketOptions;

        private MailKitMailSender()
        {
            _client.ServerCertificateValidationCallback = (s, c, h, e) => true;
        }

        public MailKitMailSender(SecureSocketOptions secureSocketOptions) : this()
        {
            _secureSocketOptions = secureSocketOptions;
            host = ConfigurationManager.AppSettings["MailServer"];
            port = Convert.ToInt32(ConfigurationManager.AppSettings["MailPort"]);
            from = ConfigurationManager.AppSettings["MailSender"];
            username = ConfigurationManager.AppSettings["MailUserName"];
            password = ConfigurationManager.AppSettings["MailPassword"];
            enablessl = false;
        }

        public void BuildMessage(List<EmailAddress> toAddressList, string subject, string body, string model)
        {
            _message = new MimeMessage();

            _message.Sender = new MailboxAddress(username, from);
            _message.From.Add(new MailboxAddress(username, from));
            _message.Subject = subject;
            _message.Body = new TextPart(TextFormat.Html) { Text = body };

            foreach (var emailAddress in toAddressList)
            {
                if (model == "BCC")//抄送模式（抄送模式只发送一个邮件，避免大量发重复邮件）
                {
                    _message.Bcc.Add(new MailboxAddress(emailAddress.Name, emailAddress.Address));
                }
                else
                {
                    _message.To.Add(new MailboxAddress(emailAddress.Name, emailAddress.Address));
                }

            }
        }
        public void Send()
        {
            try
            {
                _client.Connect(host, port, _secureSocketOptions);
                _client.Authenticate(from, password);
                _client.Send(_message);
                _client.Disconnect(true);
                Console.WriteLine("MailKit Send Success:" + _message.To.Mailboxes.First());
            }
            catch (Exception ex)
            {
                Console.WriteLine(ex.Message);
                Console.WriteLine();

            }
        }



        public async Task SendAsync()
        {
            try
            {
                await _client.ConnectAsync(host, port, _secureSocketOptions);
                await _client.AuthenticateAsync(from, password);
                await _client.SendAsync(_message);
                await _client.DisconnectAsync(true);
                Console.WriteLine("MailKit Send Success:" + _message.To.Mailboxes.First());
            }
            catch (Exception ex)
            {
                Console.WriteLine(ex.Message);
                Console.WriteLine();

            }

        }

    }

}