using System.Net;
using System.Net.Mail;
using System.Text;
using System.Threading.Tasks;

namespace learun.util
{
	/// <summary>
	/// 版 本 EasyCode EC管理后台
	/// Copyright (c) 2019-present EC管理有限公司
	/// 创建人：tobin
	/// 日 期：2019.11.05
	/// 描 述：发送邮件
	/// </summary>
	public static class MailHelper
	{
		/// <summary>
		/// 邮件服务器地址
		/// </summary>
		private static readonly string MailServer = ConfigHelper.GetConfig().MailHost;

		/// <summary>
		/// 用户名
		/// </summary>
		private static readonly string MailUserName = ConfigHelper.GetConfig().MailUserName;

		/// <summary>
		/// 密码
		/// </summary>
		private static readonly string MailPassword = ConfigHelper.GetConfig().MailPassword;

		/// <summary>
		/// 名称
		/// </summary>
		private static readonly string MailName = ConfigHelper.GetConfig().MailName;

		/// <summary>
		/// 发送邮件
		/// </summary>
		/// <param name="to">收件人邮箱地址</param>
		/// <param name="subject">主题</param>
		/// <param name="body">内容</param>
		/// <param name="encoding">编码</param>
		/// <param name="isBodyHtml">是否Html</param>
		/// <param name="enableSsl">是否SSL加密连接</param>
		/// <returns>是否成功</returns>
		public static async Task Send(string to, string subject, string body, string encoding = "UTF-8", bool isBodyHtml = true, bool enableSsl = false)
		{
			MailMessage mailMsg = new MailMessage
			{
				From = new MailAddress(MailUserName, MailName) //源邮件地址和发件人
			};//实例化对象
			mailMsg.To.Add(new MailAddress(to));//收件人地址

			mailMsg.SubjectEncoding = Encoding.GetEncoding(encoding);
			mailMsg.Subject = subject;
			mailMsg.IsBodyHtml = isBodyHtml;

			//指定smtp服务地址（根据发件人邮箱指定对应SMTP服务器地址）
			SmtpClient smtpclient = new SmtpClient(MailServer, 25)
			{
				//加密
				EnableSsl = true,
				//通过用户名和密码验证发件人身份
				Credentials = new NetworkCredential(MailUserName, MailPassword)
			};

			await smtpclient.SendMailAsync(mailMsg);
		}
	}
}