using FluentFTP;
using YLErp.MailKit;
using YLErp.Modules.AppModule;

namespace YLErp.Helpers
{
    /// <summary>
    /// 邮件发送帮助类
    /// </summary>
    public class EmailHelper
    {
        static readonly Dictionary<string, DateTime> _dic;

        static EmailHelper()
        {
            _dic = new Dictionary<string, DateTime>(StringComparer.OrdinalIgnoreCase);
        }

        public static string SendMailOfTradeConfirmBook(string mailTo, IEnumerable<string> filesToAttach, string title, string body, bool isHtml = false)
        {
            if (string.IsNullOrWhiteSpace(title))
            {
                title = "交易确认书";
            }
            if (string.IsNullOrWhiteSpace(body))
            {
                body = "请查看附件交易确认书";
            }

            try
            {
                return SendMail(mailTo, title, body, isHtml, filesToAttach);
            }
            catch (Exception ex)
            {
                LogFactory.GetLogger().Error("邮件发送失败:" + title, ex);
                return ex.Message;
            }
        }

        public static string SendMail(string mailTo, string subject, string body, bool isBodyHtml = true, IEnumerable<string> filesToAttach = null, string ccEmail = null, string mailFrom = null)
        {
            if (string.IsNullOrEmpty(mailTo))
            {
                throw new ArgumentException("不能为空", nameof(mailTo));
            }
            if (PS.Config.ErpElement.MailMessageRateLimit > 0)
            {
                var milliSeconds = 60d * 1000 / PS.Config.ErpElement.MailMessageRateLimit;

                lock (_dic)
                {
                    if (_dic.TryGetValue("sendEmail", out var dt))
                    {
                        while (dt < DateTime.Now && dt.AddMilliseconds(milliSeconds) > DateTime.Now)
                        {
                            Thread.Sleep(500);
                        }
                    }
                    _dic["sendEmail"] = DateTime.Now;
                }
            }
            return doSendMail(mailTo, subject, body, isBodyHtml, filesToAttach, ccEmail);
        }
        private static string doSendMail(string mailTo, string subject, string body, bool isBodyHtml, IEnumerable<string> filesToAttach, string ccEmail)
        {
            try
            {
                //去重
                var toSet = mailTo.Split(new[] { ';', ',', '，' }, StringSplitOptions.RemoveEmptyEntries)
                    .ToHashSet(StringComparer.OrdinalIgnoreCase);

                var mailToArr = toSet.ToArray();
                LogFactory.GetLogger("邮件发送").Info($"开始发送邮件,mailTo={mailTo},subject={subject}");
                string result = MailSender.SendApi(new MailSendingOption
                {
                    MailTo = mailToArr,
                    Subject = subject,
                    Body = body,
                    IsBodyHtml = isBodyHtml,
                    FilesToAttach = filesToAttach,
                    CC = ccEmail
                }, (name, info) => { LogFactory.GetLogger(name).Info(info); });
                LogFactory.GetLogger("邮件发送").Info($"邮件发送完成,mailTo={mailTo},subject={subject},result={result}");
                return string.Empty;
            }
            catch (Exception ex)
            {
                LogFactory.GetLogger("邮件发送").Error("邮件发送失败:" + subject, ex);

                throw ex;
            }
        }
    }
}