using System.Text;
using DS.Module.Core;
using DS.WMS.Core.Code.Entity;
using MailKit.Net.Smtp;
using MailKit.Security;
using MimeKit;
using NLog;
using Logger = NLog.Logger;

namespace DS.WMS.Core.Op.EDI
{
    public static class MailSendHelper
    {
        private static readonly Logger _logger = LogManager.GetCurrentClassLogger();
        /// <summary>
        /// 使用用户邮箱配置发送邮件
        /// </summary>
        /// <param name="acc"></param>
        /// <param name="subject"></param>
        /// <param name="body"></param>
        /// <param name="sendTo"></param>
        /// <param name="attachList">附件列表，key为附件名称，value为文件字节数组</param>
        public static async Task<DataResult> SendMail(CodeUserEmail acc, string subject, string body, string sendTo, params KeyValuePair<string, byte[]>[] attachList)
        {
            SmtpClient client = null;
            try
            {
                var message = new MimeMessage();

                if (!string.IsNullOrEmpty(acc.ShowName))
                {
                    message.From.Add(new MailboxAddress(acc.ShowName, acc.MailAccount));
                }
                else
                {
                    message.From.Add(MailboxAddress.Parse(acc.MailAccount));
                }

                //分隔符不统一，统一替换成分号
                sendTo = sendTo.Replace(",", ";");

                if (sendTo.IndexOf(";") > -1)
                {
                    var arrSendTo = sendTo.Split(";".ToCharArray(), StringSplitOptions.RemoveEmptyEntries);
                    foreach (var s in arrSendTo)
                    {
                        var trimStr = s.Trim();
                        if (!string.IsNullOrEmpty(trimStr))
                        {
                            message.To.Add(MailboxAddress.Parse(trimStr));
                        }
                    }
                }
                else
                {
                    message.To.Add(MailboxAddress.Parse(sendTo));
                }

                message.Subject = subject;
                message.Sender = MailboxAddress.Parse(acc.MailAccount);

                var html = new TextPart("html")
                {
                    Text = body
                };

                if (attachList != null && attachList.Length > 0)
                {
                    var mult = new Multipart("mixed") { html };

                    foreach (var item in attachList)
                    {
                        var attPart = new MimePart();
                        attPart.Content = new MimeContent(new MemoryStream(item.Value));
                        attPart.ContentDisposition = new ContentDisposition(ContentDisposition.Attachment);
                        attPart.ContentTransferEncoding = ContentEncoding.Base64;
                        attPart.FileName = "=?UTF-8?B?" + Convert.ToBase64String(Encoding.UTF8.GetBytes(item.Key)) + "?=";
                        mult.Add(attPart);
                    }

                    message.Body = mult;
                }
                else
                {
                    message.Body = html;
                }

                using (client = new SmtpClient())
                {
                    _logger.Info($"准备发送邮件{subject} 从【{acc.MailAccount}】到【{sendTo}】，{acc.SmtpServer} {acc.SmtpPort} {acc.SmtpSSL}");
                    await client.ConnectAsync(acc.SmtpServer, acc.SmtpPort.Value, acc.SmtpSSL.HasValue && acc.SmtpSSL.Value ? SecureSocketOptions.SslOnConnect : SecureSocketOptions.None);
                    await client.AuthenticateAsync(acc.MailAccount, acc.Password);
                    await client.SendAsync(message);

                    await client.DisconnectAsync(true);
                }

                _logger.Info($"mail send success:{subject}");

                return DataResult.Successed("发送成功");
            }
            catch (Exception ex)
            {
                _logger.Error($"mail send fail:{subject} 从【{acc.MailAccount}】到【{sendTo}】，{acc.SmtpServer} {acc.SmtpPort} {acc.SmtpSSL}");
                _logger.Error(ex.Message);
                _logger.Error(ex.StackTrace);

                return DataResult.Failed(ex.Message);
            }
        }
    }
}