using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
using System.Net;
using System.Net.Mail;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using System.Xml.Linq;

namespace FCS.Common
{
    public class EmailHelper
    {
        private static Email model;
        static EmailHelper()
        {
            #region 获取配置数据
            string configFile = AppDomain.CurrentDomain.BaseDirectory + "/XmlConfig/Email.xml";
             model = CommonHelper.ConvertXMLToObject<Email>(configFile, "UrlSetting")[0] as Email;
       
            #endregion
        }

        /// <summary>
        /// 发送邮件到指定收件人
        /// </summary>
        /// <param name="to">收件人地址</param>
        /// <param name="subject">主题</param>
        /// <param name="mailBody">正文内容（支持HTML）</param>
        /// <param name="copyTos">抄送地址列表</param>
        /// <returns>是否发送成功</returns>
        public static bool Send(string to, string subject, string mailBody, params string[] copyTos)
        {
            return Send(new[] { to }, subject, mailBody, copyTos, new string[] { }, MailPriority.Normal);

        }

        /// <summary>
        /// 发送邮件到指定收件人
        /// </summary>
        /// <remarks>
        /// </remarks>
        /// <param name="tos">收件人地址列表</param>
        /// <param name="subject">主题</param>
        /// <param name="mailBody">正文内容(支持HTML)</param>
        /// <param name="ccs">抄送地址列表</param>
        /// <param name="bccs">密件抄送地址列表</param>
        /// <param name="priority">此邮件的优先级</param>
        /// <param name="attachments">附件列表</param>
        /// <returns>是否发送成功</returns>
        /// <exception cref="System.ArgumentNullException">attachments</exception>
        public static bool Send(string[] tos, string subject, string mailBody, string[] ccs, string[] bccs, MailPriority priority, params Attachment[] attachments)
        {
            try
            {
                Encoding encode = Encoding.UTF8;
                SmtpClient smtp = new SmtpClient();
                smtp.DeliveryMethod = SmtpDeliveryMethod.Network;//将smtp的出站方式设为 Network    
                smtp.Host = model.SmtpServer;//指定 smtp 服务器地址  
                smtp.Port = model.SmtpServerPort;//指定 smtp 服务器的端口，默认是25，如果采用默认端口，可省去    
                //如果需要认证，则用此的方式    
                smtp.EnableSsl = model.SmtpEnableSsl;//smtp服务器是否启用SSL加密     
                //如果你的SMTP服务器不需要身份认证，则使用下面的方式，不过，目前基本没有不需要认证的了   
                smtp.UseDefaultCredentials = true;
                smtp.Credentials = new NetworkCredential(model.SmtpUsername, model.SmtpUserPassword);
                MailMessage mail = new MailMessage();
                mail.Priority = MailPriority.High; //邮件的优先级，分为 Low, Normal, High，通常用 Normal即可   
                MailAddress ma = new MailAddress(model.SmtpUsername, model.SmtpDisplayName, encode);
                //收件方看到的邮件来源；    
                //第一个参数是发信人邮件地址   
                //第二参数是发信人显示的名称    
                //第三个参数是 第二个参数所使用的编码，如果指定不正确，则对方收到后显示乱码   
                //936是简体中文的codepage值     
                //注：上面的邮件来源，一定要和你登录邮箱的帐号一致，否则会认证失败   
                mail.From = ma;
                //邮件的接收者，支持群发，多个地址之间用(半角逗号)分开   
                foreach (var acceptMail in tos)
                {
                    mail.To.Add(acceptMail);
                }
                if (ccs != null)
                    foreach (var acceptMail in ccs)
                    {
                        mail.Bcc.Add(acceptMail);
                    }
                mail.SubjectEncoding = encode;
                mail.Subject = subject;
                mail.IsBodyHtml = true;//是否启用html代码   
                mail.BodyEncoding = encode;
                mail.Body = mailBody;
                smtp.Send(mail);
                Trace.WriteLine("发送成功！");
                return true;
            }
            catch (Exception ex)
            {
                Thread.CurrentThread.Abort();
                Trace.WriteLine("发送失败！");
                return false;
            }
        }
    }

    public class Email
    {

        public string SmtpServer { get; set; }//SMTP服务器
        public int SmtpServerPort { get; set; }//SMTP端口
        public bool SmtpEnableSsl { get; set; }//是否SSL加密连接
        public string SmtpUsername { get; set; }//发件人邮箱地址
        public string SmtpDisplayName { get; set; }//发件人昵称
        public string SmtpUserPassword { get; set; }//授权码
    }
}