using System;
using System.Net;
using System.Net.Mail;
using System.Text;
using MailMessage = System.Net.Mail.MailMessage;
using MailPriority = System.Net.Mail.MailPriority;

namespace CommonTool
{
	/// <summary>
	/// 邮件公用类
	/// </summary>
	public class EmailHelper
	{
		#region 属性

		/// <summary>
		/// 邮箱账号(默认为发送者邮箱的账号)
		/// </summary>
		public string UserEmail { get; set; } = "";

		/// <summary>
		/// 邮箱密码(默认为发送者邮箱的密码)，默认格式UTF8
		/// </summary>
		public string Password { get; set; } = "";

		/// <summary>
		/// 发送者邮箱
		/// </summary>
		public string From { get; set; } = "";

		/// <summary>
		/// 发送者名称
		/// </summary>
		public string FromName { get; set; } = "";

		/// <summary>
		/// 接收者邮箱列表
		/// </summary>
		public string[] To { get; set; } = { "" };

		/// <summary>
		/// 抄送者邮箱列表
		/// </summary>
		public string[] Cc { get; set; } = { "" };

		/// <summary>
		/// 秘抄者邮箱列表
		/// </summary>
		public string[] Bcc { get; set; } = { "" };

		/// <summary>
		/// 邮件主题
		/// </summary>
		public string Subject { get; set; } = "";

		/// <summary>
		/// 邮件内容
		/// </summary>
		public string Body { get; set; } = "";

		/// <summary>
		/// 是否是HTML格式
		/// </summary>
		public bool IsBodyHtml { get; set; } = true;

		/// <summary>
		/// 附件列表
		/// </summary>
		public string[] Attachments { get; set; } = { "" };

		/// <summary>
		/// 邮箱服务类型(Pop3,SMTP,IMAP,MAIL等)，默认为SMTP
		/// </summary>
		public string ServiceType { get; set; } = "SMTP";

		/// <summary>
		/// 邮箱服务器
		/// </summary>		
		public string Host { get; set; } = "";

		/// <summary>
		/// 邮箱服务器端口
		/// </summary>
		public int Port { get; set; } = 25;

		/// <summary>
		/// 邮箱优先级
		/// </summary>
		public MailPriority MailPriority { get; set; } = MailPriority.High;

		/// <summary>
		///  邮件编码格式
		/// </summary>
		public Encoding Encoding { get; set; } = Encoding.UTF8; 

		#endregion

		/// <summary>
		/// 发送邮件
		/// </summary>
		public bool Send()
		{
			var mailMessage = new MailMessage();
			
			
			try
			{
				#region 创建mailMessage

				//读取To  接收者邮箱列表
				if (To != null && To.Length > 0)
				{
					foreach (string to in To)
					{
						if (string.IsNullOrEmpty(to)) continue;
						mailMessage.To.Add(new MailAddress(to.Trim()));
					}
				}

				//读取Cc  抄送者邮件地址
				if (Cc != null && Cc.Length > 0)
				{
					foreach (var cc in Cc)
					{
						if (string.IsNullOrEmpty(cc)) continue;
						mailMessage.CC.Add(new MailAddress(cc.Trim()));
					}
				}

				//读取Attachments 邮件附件
				if (Attachments != null && Attachments.Length > 0)
				{
					foreach (var attachment in Attachments)
					{
						if (string.IsNullOrEmpty(attachment)) continue;
						mailMessage.Attachments.Add(new Attachment(attachment));
					}
				}

				//读取Bcc 秘抄人地址
				if (Bcc != null && Bcc.Length > 0)
				{
					foreach (var bcc in Bcc)
					{
						if (string.IsNullOrEmpty(bcc)) continue;
						mailMessage.Bcc.Add(new MailAddress(bcc.Trim()));
					}
				}

				//读取From 发送人地址
				mailMessage.From = new MailAddress(From, FromName, Encoding);

				//邮件标题
				mailMessage.Subject = Subject;
				mailMessage.SubjectEncoding = Encoding;

				//邮件正文是否为HTML格式
				mailMessage.IsBodyHtml = IsBodyHtml;

				//邮件正文
				mailMessage.Body = Body;
				mailMessage.BodyEncoding = Encoding;

				//邮件优先级
				mailMessage.Priority = MailPriority;

				#endregion

				#region 创建smtpClient
				
				//发送邮件代码实现
				var smtpClient = new SmtpClient(Host,Port)
				{
					EnableSsl = true,
					Credentials = new NetworkCredential(UserEmail, Password),
					UseDefaultCredentials = false,
					DeliveryMethod = SmtpDeliveryMethod.Network,
				};
				ServicePointManager.ServerCertificateValidationCallback = (obj, certificate, chain, errors) => true;
				#endregion

				//发送
				smtpClient.Send(mailMessage);
				return true;
			}

			catch (Exception)
			{
				return false;
			}
		}
	}

	/// <summary>
	/// 发送邮件验证码
	/// </summary>
	public class EmailCodeHelper
	{
		#region 字段属性

		/// <summary>
		/// 验证码有效期（分钟）
		/// </summary>
		public int TimeOut { get; set; } = 10;

		/// <summary>
		/// 随机验证码
		/// </summary>
		public string CheckCode { get; } = new Random().Next(100000, 999999).ToString();

		/// <summary>
		/// 邮箱用户名（在RSDB文件中<email></email>配置）
		/// </summary>
		public string Email { get; set; } 

		/// <summary>
		/// 邮箱用户名（在RSDB文件中<emailPassWord></emailPassWord>配置）
		/// </summary>
		public string EmailPwd { get; set; } 

		/// <summary>
		/// 服务器主机名
		/// </summary>
		public string Host { get; set; }

		/// <summary>
		/// 服务器端口号
		/// </summary>
		public int Port { get; set; }

		/// <summary>
		/// 发件人邮箱地址
		/// </summary>
		public string FromMailAddressStr { get; set; } = "iwbNet@iwbNet.com";

		/// <summary>
		/// 发件人名称
		/// </summary>
		public string FromMailName { get; set; } = "玮博";

		/// <summary>
		/// 收件人地址（多个地址以“，”隔开）
		/// </summary>
		public string ToMailAddressStr { get; set; }

		/// <summary>
		/// 收件人地址数组
		/// </summary>
		private string[] ToMailAddressStrArr => ToMailAddressStr.Split(',');

		/// <summary>
		/// 邮件标题
		/// </summary>
		public string EMailSubject { get; set; } = "用户验证码（请勿回复此邮件）";
		
		/// <summary>
		/// 邮件内容
		/// </summary>
		public string EMailBody
		{
			get
			{
				if (string.IsNullOrEmpty(_eMailBody))
					_eMailBody = "亲爱的用户<br/><br/>您好，您本次验证码为：" + CheckCode + ",该验证码有效期为" + TimeOut + "分钟，切勿告诉他人。";
				return _eMailBody;
			}
			set { _eMailBody = value; }
		}
		private string _eMailBody;

		/// <summary>
		/// 邮件编码格式
		/// </summary>
		public Encoding Encoding { get; set; }

		/// <summary>
		/// 邮箱优先级
		/// </summary>
		public MailPriority MailPriority { get; set; }

		/// <summary>
		/// 邮件
		/// </summary>
		public EmailHelper EMailMsg { get; set; }

		#endregion

		#region 构造函数

		/// <summary>
		/// 构造函数()
		/// </summary>
		/// <param name="toMailAddressStr">收件人地址</param>
		/// <param name="host">服务器主机名（端口默认25）</param>
		public EmailCodeHelper(string toMailAddressStr, string host)
		{
			ToMailAddressStr = toMailAddressStr;
			Host = host;
		}

		/// <summary>
		/// 构造函数(重新指定服务器端口)
		/// </summary>
		/// <param name="toMailAddressStr">收件人地址</param>
		/// <param name="host">主机名</param>
		/// <param name="port">端口名，默认25</param>
		public EmailCodeHelper(string toMailAddressStr, string host, int port)
			: this(toMailAddressStr, host)
		{
			Port = port;
		}

		/// <summary>
		/// 构造函数重载(重写用户名，密码）
		/// </summary>
		/// <param name="toMailAddressStr">收件人地址</param>
		/// <param name="host">主机名</param>
		/// <param name="port">端口名</param>
		/// <param name="email">邮箱用户名</param>
		/// <param name="emailPwd">邮箱密码</param>
		public EmailCodeHelper(string toMailAddressStr, string host, int port, string email, string emailPwd)
			: this(toMailAddressStr, host, port)
		{
			Email = email;
			EmailPwd = emailPwd;
		}

		/// <summary>
		/// 构造函数重载(重写邮件内容、用户名，密码）
		/// </summary>
		/// <param name="toMailAddressStr">收件人地址</param>
		/// <param name="host">主机名</param>
		/// <param name="port">端口名</param>
		/// <param name="subject">邮件标题</param>
		/// <param name="body">邮件内容</param>
		/// <param name="fromMailAddressStr">发件人地址</param>
		public EmailCodeHelper(string toMailAddressStr, string host, int port, string subject, string body, string fromMailAddressStr)
			: this(toMailAddressStr, host, port)
		{
			EMailSubject = subject;
			EMailBody = body;
			FromMailAddressStr = fromMailAddressStr;
		}

		/// <summary>
		/// 构造函数重载(重写邮件内容）
		/// </summary>
		/// <param name="toMailAddressStr">收件人地址</param>
		/// <param name="host">主机名</param>
		/// <param name="port">端口名</param>
		/// <param name="subject">邮件标题</param>
		/// <param name="body">邮件内容</param>
		/// <param name="fromMailAddressStr">发件人地址</param>
		/// <param name="email">邮箱用户名</param>
		/// <param name="emailPwd">邮箱密码</param>
		public EmailCodeHelper(string toMailAddressStr, string host, int port, string subject, string body, string fromMailAddressStr, string email, string emailPwd)
			: this(toMailAddressStr, host, port, subject, body, fromMailAddressStr)
		{
			Email = email;
			EmailPwd = emailPwd;
		}

		#endregion

		/// <summary>
		/// 创建邮件
		/// </summary>
		/// <returns></returns>
		public EmailHelper CreateMailMsg()
		{
			return new EmailHelper()
			{
				UserEmail = Email,
				Password = EmailPwd,
				Host = Host,
				Port = Port,
				Subject = EMailSubject,
				Body = EMailBody,
				From = FromMailAddressStr,
				FromName = FromMailName,
				To = ToMailAddressStrArr,
			};
		}

		/// <summary>
		/// 发送邮件
		/// </summary>
		/// <returns></returns>
		public bool Send()
		{
			EMailMsg = CreateMailMsg();
			return EMailMsg.Send();
		}
	}
}