using System.Collections.Generic;
using System.IO;
using System.Net.Mail;

namespace RoadFlow.Utility
{
    public class Mail
    {
        /// <summary>
        /// 邮件实体
        /// </summary>
        public class MailModel
        {
            /// <summary>
            /// 接收人
            /// </summary>
            public string ReceiverName { get; set; }
            /// <summary>
            /// 接收邮件地址
            /// </summary>
            public string ReceiveMail { get; set; }
            /// <summary>
            /// 邮件主题
            /// </summary>
            public string Subject { get; set; }
            /// <summary>
            /// 邮件内容（可带HTML格式）
            /// </summary>
            public string Contents { get; set; }
            /// <summary>
            /// 邮件附件绝对地址（多个用逗号隔开）
            /// </summary>
            public string Attachments { get; set; } = string.Empty;
        }

        /// <summary>
        /// 邮件服务器
        /// </summary>
        private string _smtpServer;
        /// <summary>
        /// 邮件服务器端口
        /// </summary>
        private int _port;
        /// <summary>
        /// 是否使用SSL
        /// </summary>
        private bool _enableSsl;
        /// <summary>
        /// 邮件帐号
        /// </summary>
        private string _account;
        /// <summary>
        /// 邮件密码
        /// </summary>
        private string _password;
        /// <summary>
        /// 发件人
        /// </summary>
        private string _senderName;
        /// <summary>
        /// 发件人邮件地址
        /// </summary>
        private string _senderMail;
        public Mail(string smtpServer, int port, bool enableSsl, string account, string password, string senderName, string senderMail)
        {
            _smtpServer = smtpServer;
            _port = port;
            _enableSsl = enableSsl;
            _account = account;
            _password = password;
            _senderName = senderName;
            _senderMail = senderMail;
        }
        public Mail()
        {
            _smtpServer = Config.MailServer;
            _port = Config.MailPort;
            _enableSsl = Config.MailEnableSsl;
            _account = Config.MailAccount;
            _password = Config.MailPassword;
            _senderName = Config.MailSenderName;
            _senderMail = Config.MailSenderMail;
        }
        /// <summary>
        /// 发送邮件
        /// </summary>
        /// <param name="receiver">收件人姓名</param>
        /// <param name="mail">收件人邮箱地址</param>
        /// <param name="subject">邮件主题</param>
        /// <param name="content">邮件内容（可带HTML格式）</param>
        /// <param name="files">邮件附件绝对地址（多个用逗号隔开）</param>
        public void Send(string receiver, string mail, string subject, string content, string files = "")
        {
            MailModel mailModel = new MailModel()
            {
                ReceiverName = receiver,
                ReceiveMail = mail,
                Subject = subject,
                Contents = content,
                Attachments = files
            };
            Send(new List<MailModel>() { mailModel });
        }

        /// <summary>
        /// 发送邮件
        /// </summary>
        /// <param name="mailModel"></param>
        public void Send(MailModel mailModel)
        {
            Send(mailModel);
        }

        /// <summary>
        /// 一次发多个邮件
        /// </summary>
        /// <param name="mails"></param>
        public void Send(List<MailModel> mails)
        {
            if (_smtpServer.IsNullOrWhiteSpace() || _account.IsNullOrWhiteSpace() || _password.IsNullOrWhiteSpace()
                || _senderName.IsNullOrWhiteSpace() || _senderMail.IsNullOrWhiteSpace() || mails == null || mails.Count == 0)
            {
                return;
            }

            // 邮件对象
            MailMessage emailMessage;

            // smtp客户端对象
            using (SmtpClient client = new SmtpClient())
            {
                client.Host = _smtpServer;// 邮件服务器及帐户信息
                if (_port > 0)
                {
                    client.Port = _port;
                }
                if (_enableSsl)
                {
                    client.EnableSsl = true;
                }
                System.Net.NetworkCredential Credential = new System.Net.NetworkCredential
                {
                    UserName = _account,
                    Password = _password
                };
                client.Credentials = Credential;

                // 发件人
                MailAddress sendMail = new MailAddress(_senderMail, _senderName);
                foreach (var mail in mails)
                {
                    MailAddress receiveMail = new MailAddress(mail.ReceiveMail);
                    emailMessage = new MailMessage(sendMail, receiveMail)
                    {
                        Subject = mail.Subject,
                        Body = mail.Contents,
                        IsBodyHtml = true,
                        SubjectEncoding = System.Text.Encoding.Default,
                        BodyEncoding = System.Text.Encoding.Default
                    };
                    if (!mail.Attachments.IsNullOrWhiteSpace())
                    {
                        foreach (string file in mail.Attachments.Split(','))
                        {
                            if (file.IsNullOrWhiteSpace() || !System.IO.File.Exists(file))
                            {
                                continue;
                            }
                            Attachment attachment = new Attachment(File.OpenRead(file), Path.GetFileName(file));
                            emailMessage.Attachments.Add(attachment);
                        }
                    }
                    try
                    {
                        client.Send(emailMessage);
                    }
                    catch
                    {

                    }
                }
            }
        }

    }
}