using System;
using System.Net;
using System.Net.Mail;
using System.Text;
using Utils;

namespace SiteCore
{

    /// <summary>
    /// 邮件发送成功之后执行的方法
    /// </summary>
    public interface ISuccessCallback
    {

        /// <summary>
        /// 邮件发送成功之后执行的方法
        /// </summary>
        void SuccessRun();
    }

    /// <summary>
    /// 邮件发送服务(如果因为网络不通等原因发送失败，则会自动记录日志)
    /// </summary>
    /// <example>
    /// 使用说明
    /// <code>
    /// MailService mail = new MailService( "smtp.gmail.com", "aaa@gmail.com", "123456" );
    /// mail.setSender( "岳不群" ); // 此行(即发送人)可省略
    /// mail.send( "aaa@126.com", "岳老二的邮件标题", "此处内容，此处<strong style='color:red;font-size:36px;'>html部分</strong>"
    /// </code>
    /// </example>
    public class MailService
    {
        private readonly String _smtpUrl = config.Instance.dics["smtpUrl"];
        private readonly String _smtpUser = config.Instance.dics["mailUser"];
        private readonly String _smtpPwd = config.Instance.dics["mailPwd"];

        private String _senderName;

        private Boolean _enableSsl = true;
        private MailPriority _mailPriority = MailPriority.Normal;
        private Boolean _isBodyHtml = true;


        private ISuccessCallback sendSuccessCallback;

        /// <summary>
        /// 创建一个发送对象
        /// </summary>
        /// <param name="smtpUrl">smtp 地址</param>
        /// <param name="user">登录名</param>
        /// <param name="pwd">密码</param>
        public MailService(String smtpUrl, String user, String pwd)
        {
            _smtpUrl = smtpUrl;
            _smtpUser = user;
            _smtpPwd = pwd;
        }
        public MailService()
        {
            //_smtpUrl = config.Instance.Site.SmtpUrl;
            //_smtpUser = config.Instance.Site.SmtpUser;
            //_smtpPwd = config.Instance.Site.SmtpPwd;
        }
        /// <summary>
        /// 是否启用 ssl 链接(默认是启用的)
        /// </summary>
        /// <param name="isSsl"></param>
        public void enableSsl(Boolean isSsl)
        {
            _enableSsl = isSsl;
        }

        /// <summary>
        /// 默认启用 html
        /// </summary>
        /// <param name="isHtml"></param>
        public void isBodyHtml(Boolean isHtml)
        {
            _isBodyHtml = isHtml;
        }

        /// <summary>
        /// 设置高优先级
        /// </summary>
        public void priorityHight()
        {
            _mailPriority = MailPriority.High;
        }

        /// <summary>
        /// 设置低优先级
        /// </summary>
        public void priorityLow()
        {
            _mailPriority = MailPriority.Low;
        }

        /// <summary>
        /// 设置普通优先级
        /// </summary>
        public void priorityNormal()
        {
            _mailPriority = MailPriority.Normal;
        }

        /// <summary>
        /// 设置发送者名称
        /// </summary>
        /// <param name="name"></param>
        public void setSender(String name)
        {
            _senderName = name;
        }

        /// <summary>
        /// 设置发送成功之后执行的方法
        /// </summary>
        /// <param name="action"></param>
        public void successCallback(ISuccessCallback action)
        {
            sendSuccessCallback = action;
        }

        /// <summary>
        /// 发送方法
        /// </summary>
        /// <param name="to">接收方的email</param>
        /// <param name="title">邮件标题</param>
        /// <param name="htmlBody">邮件内容</param>
        /// <returns>是否成功</returns>
        public Boolean send(String to, String title, String htmlBody)
        {

            if (strUtil.IsNullOrEmpty(_senderName)) _senderName = _smtpUser;


            using (MailMessage message = new MailMessage())
            {

                message.Subject = title;
                message.SubjectEncoding = Encoding.UTF8;
                message.From = new MailAddress(_smtpUser, _senderName, Encoding.UTF8);
                string[] tArr = to.Split(',');
                foreach (string t in tArr)
                {
                    message.To.Add(new MailAddress(t, t, Encoding.UTF8));
                }
                message.Body = htmlBody;
                message.BodyEncoding = Encoding.UTF8;

                message.IsBodyHtml = _isBodyHtml;
                message.Priority = _mailPriority;


                SmtpClient client = new SmtpClient(_smtpUrl);

                client.UseDefaultCredentials = true;
                client.Credentials = new NetworkCredential(_smtpUser, _smtpPwd);
                client.EnableSsl = _enableSsl;



                try
                {
                    client.Send(message);
                    if (sendSuccessCallback != null)
                        sendSuccessCallback.SuccessRun();
                    return true;
                }
                catch (SmtpException ex)
                {
                    String info = "send mail to " + to + " : " + title;
                    throw;
                }
            }

        }



    }

}