using System.Data.Entity;
using log4net;
using MailKit.Net.Smtp;
using MimeKit;
using Quartz;
using System;
using System.Collections.Generic;
using System.Configuration;
using System.Linq;
using System.Web;

namespace JobSendAgentMail
{
    /* 注意 依赖于几个表
     * 
     * 
     //待发邮件表 自动发出其中 sendstatus=create的
    
     CREATE TABLE [dbo].[Mail_Send](
	[GID] [nvarchar](128) NOT NULL,
	[SendTo] [nvarchar](max) NULL,
	[CCTo] [nvarchar](max) NULL,
	[Title] [nvarchar](max) NULL,
	[Body] [nvarchar](max) NULL,
	[SendStatus] [nvarchar](40) NULL,
	[SendTime] [datetime] NULL,
	[TryCount] [int] NOT NULL,
	[CreateTime] [datetime] NOT NULL,
	[RelativeId] [nvarchar](max) NULL,
	[SmtpConfig] [varchar](36) NULL,
	[Sender] [varchar](64) NULL,
	[ShowName] [nvarchar](50) NULL,
 CONSTRAINT [PK_dbo.Mail_Send] PRIMARY KEY CLUSTERED 
(
	[GID] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
) ON [PRIMARY] TEXTIMAGE_ON [PRIMARY]
GO
     //发送日志记录
CREATE TABLE [dbo].[op_mail_log](
	[GID] [varchar](60) NOT NULL,
	[BSNO] [varchar](60) NULL,
	[BLTYPE] [varchar](20) NULL,
	[RECEIVER] [varchar](100) NULL,
	[SUBJECT] [varchar](300) NULL,
	[DESCRIPTION] [varchar](max) NULL,
	[ATTACHMENT] [varchar](600) NULL,
	[SENDTIME] [datetime] NULL,
	[SENDER] [varchar](10) NULL,
	[SENDUSER] [varchar](60) NULL,
	CCTo varchar(500) null,
 CONSTRAINT [PK_op_mail_log] PRIMARY KEY CLUSTERED 
(
	[GID] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
) ON [PRIMARY] TEXTIMAGE_ON [PRIMARY]
GO

     */

    /// <summary>
    /// 发送邮件任务
    /// </summary>
    public class SendMailJob : IJob
    {
        private const int MailSendTryTimes = 3;

        private ILog logger = LogManager.GetLogger(typeof(SendMailJob));

        public void Execute(IJobExecutionContext context)
        {

            string connStr = context.JobDetail.JobDataMap.GetString("ConnectString");
            string MAILSENDACCOUNT = context.JobDetail.JobDataMap.GetString("MAILSENDACCOUNT");
            string MAILSENDPASSWORD = context.JobDetail.JobDataMap.GetString("MAILSENDPASSWORD");
            string MAILSENDSERVICE = context.JobDetail.JobDataMap.GetString("MAILSENDSERVICE");
            string MAILSENDPORT = context.JobDetail.JobDataMap.GetString("MAILSENDPORT");
            string MAILISSSL = context.JobDetail.JobDataMap.GetString("MAILISSSL");
            MailDataContext commonDataContext = new MailDataContext(connStr);

            var sendMailList = commonDataContext.MailSend.Where(sm => sm.SendStatus == MailSend.MailSendStatusCreate).OrderBy(sm => sm.CreateTime).Take(20).ToList();
            if (sendMailList.Count > 0)
            {
                //先更改状态，防止其他线程重复发送
                foreach (var sendMail in sendMailList)
                {
                    logger.Debug($"mail ready to send:{sendMail.GID} {sendMail.Title}");

                    sendMail.SendStatus = MailSend.MailSendStatusSending;
                    sendMail.SendTime = DateTime.Now;
                    sendMail.TryCount++;
                    commonDataContext.SaveChanges();
                }

                //逐个发送
                foreach (var sendMail in sendMailList)
                {
                    try
                    {

                        var message = new MimeMessage();
                        message.From.Add(MailboxAddress.Parse(MAILSENDACCOUNT));

                        if (sendMail.SendTo.IndexOf(",") > -1)
                        {
                            var arrSendTo = sendMail.SendTo.Split(",".ToCharArray(), StringSplitOptions.RemoveEmptyEntries);
                            foreach (var s in arrSendTo)
                            {
                                message.To.Add(MailboxAddress.Parse(s));
                            }
                        }
                        else if (sendMail.SendTo.IndexOf(";") > -1)
                        {
                            var arrSendTo = sendMail.SendTo.Split(";".ToCharArray(), StringSplitOptions.RemoveEmptyEntries);
                            foreach (var s in arrSendTo)
                            {
                                message.To.Add(MailboxAddress.Parse(s));
                            }
                        }
                        else
                        {
                            message.To.Add(MailboxAddress.Parse(sendMail.SendTo));
                        }
                        if (!string.IsNullOrWhiteSpace(sendMail.CCTo))
                        {
                            if (sendMail.CCTo.IndexOf(",") > -1)
                            {
                                var arrSendTo = sendMail.CCTo.Split(",".ToCharArray(), StringSplitOptions.RemoveEmptyEntries);
                                foreach (var s in arrSendTo)
                                {
                                    message.To.Add(MailboxAddress.Parse(s));
                                }
                            }
                            else if (sendMail.CCTo.IndexOf(";") > -1)
                            {
                                var arrSendTo = sendMail.CCTo.Split(";".ToCharArray(), StringSplitOptions.RemoveEmptyEntries);
                                foreach (var s in arrSendTo)
                                {
                                    message.To.Add(MailboxAddress.Parse(s));
                                }
                            }
                            else
                            {
                                message.To.Add(MailboxAddress.Parse(sendMail.CCTo));
                            }
                        }

                        message.Subject = sendMail.Title;
                        var html = new TextPart("html")
                        {
                            Text = sendMail.Body
                        };
                        MimeEntity entity = html;
                        //if (!string.IsNullOrEmpty(sendMail.Sender))
                        //{
                        //    message.Sender = MailboxAddress.Parse(sendMail.Sender);
                        //}

                        message.Body = entity;
                        using (var client = new SmtpClient())
                        {
                            client.Connect(MAILSENDSERVICE, Convert.ToInt16(MAILSENDPORT), Convert.ToBoolean(MAILISSSL));
                            client.Authenticate(MAILSENDACCOUNT, MAILSENDPASSWORD);
                            client.Send(message);


                            client.Disconnect(true);
                        }
                        logger.Debug($"发送成功:{sendMail.GID} {sendMail.Title}");
                        sendMail.SendStatus = MailSend.MailSendStatusSuccess;
                        //commonDataContext.SaveChanges();

                        var OpMailLog = new OpMailLog();
                        OpMailLog.SUBJECT = sendMail.Title;
                        OpMailLog.RECEIVER = sendMail.SendTo;
                        OpMailLog.BSNO = sendMail.RelativeId;
                        OpMailLog.DESCRIPTION = sendMail.Body;
                        OpMailLog.SENDUSER = MAILSENDACCOUNT;
                        OpMailLog.BLTYPE = "舱单回执转发";
                        commonDataContext.OpMailLogs.Add(OpMailLog);

                        commonDataContext.SaveChanges();
                        logger.Debug($"mail send success:{sendMail.GID} {sendMail.Title}");
                    }
                    catch (Exception ex)
                    {
                        if (sendMail.TryCount < MailSendTryTimes)
                        {
                            sendMail.SendStatus = MailSend.MailSendStatusCreate; //会再次尝试发送
                        }
                        else
                        {
                            sendMail.SendStatus = MailSend.MailSendStatusFail;
                        }
                        commonDataContext.SaveChanges();

                        logger.Error($"mail send fail:{sendMail.GID} {sendMail.Title}，times:{sendMail.TryCount}");
                        logger.Error(ex.Message);
                        logger.Error(ex.StackTrace);
                    }
                }
            }
        }
    }
}