using Swift.API.Common;
using System;
using System.Collections.Generic;
using System.IO;
using System.Net.Mail;
using System.Net.Mime;

namespace Swift.web.Library
{
    public class SmtpMailSetting
    {
        public SmtpMailSetting()
        {
            ToEmails = "";
            CcEmails = "";
            BccEmails = "";
            MsgSubject = "";
            MsgBody = "";
            SmtpPort = Convert.ToInt16(GetStatic.ReadWebConfig("SmtpPort", ""));
            SmtpServer = GetStatic.ReadWebConfig("SmtpServer", "");
            SendEmailId = GetStatic.ReadWebConfig("SendEmailId", "");
            SendEmailPwd = GetStatic.ReadWebConfig("SendEmailPwd", "");
            EnableSsl = true;
        }

        public int SmtpPort { get; set; }
        public string SmtpServer { get; set; }
        public string SendEmailId { get; set; }
        public string SendEmailPwd { get; set; }
        public string ToEmails { get; set; }
        public string CcEmails { get; set; }
        public string BccEmails { get; set; }
        public string MsgSubject { get; set; }
        public string MsgBody { get; set; }
        public bool EnableSsl { get; set; }
        public string Status { get; set; }

        /// <summary>
        /// Send mail through gme SMTP server
        /// </summary>
        /// <param name="smtpMail">
        /// receiver details mail body and subject
        /// </param>
        /// <returns>
        /// </returns>
        public string SendSmtpMail(SmtpMailSetting smtpMail, List<AttachmentModel> attachmentList = null, List<AttachmentModel> embadedList = null)
        {
            MailMessage mail = new MailMessage();
            SmtpClient SmtpServer = new SmtpClient();
            try
            {
                SmtpServer.Host = smtpMail.SmtpServer;
                SmtpServer.Port = smtpMail.SmtpPort;
                SmtpServer.UseDefaultCredentials = false;
                SmtpServer.Credentials = new System.Net.NetworkCredential(smtpMail.SendEmailId, smtpMail.SendEmailPwd);
                SmtpServer.EnableSsl = EnableSsl;

                mail.From = new MailAddress(smtpMail.SendEmailId);
                mail.To.Add(smtpMail.ToEmails);
                var ccList = smtpMail.CcEmails.Split(';');
                if (ccList[0] != "")
                {
                    for (int i = 0; i < ccList.Length; i++)
                    {
                        mail.CC.Add(ccList[i]);
                    }
                }

                //if (!string.IsNullOrEmpty(smtpMail.CcEmails))
                //     mail.CC.Add(smtpMail.CcEmails);
                if (!string.IsNullOrEmpty(smtpMail.BccEmails))
                    mail.Bcc.Add(smtpMail.BccEmails);

                mail.Subject = smtpMail.MsgSubject;
                mail.IsBodyHtml = true;
                mail.Body = smtpMail.MsgBody;

                if (attachmentList != null)
                {
                    foreach (var item in attachmentList)
                    {
                        Attachment attachment = new Attachment(item.FilePath, item.FileType);
                        ContentDisposition disposition = attachment.ContentDisposition;
                        disposition.CreationDate = File.GetCreationTime(item.FilePath);
                        disposition.ModificationDate = File.GetLastWriteTime(item.FilePath);
                        disposition.ReadDate = File.GetLastAccessTime(item.FilePath);
                        disposition.FileName = Path.GetFileName(item.FileName);
                        disposition.Size = new FileInfo(item.FilePath).Length;
                        disposition.DispositionType = DispositionTypeNames.Attachment;
                        mail.Attachments.Add(attachment);
                    }
                }

                if (embadedList != null)
                {
                    if (embadedList.Count > 0)
                    {
                        AlternateView vw = GetEmbeddedImage(embadedList, smtpMail.MsgBody);
                        mail.AlternateViews.Add(vw);
                    }
                }

                System.Net.ServicePointManager.SecurityProtocol = System.Net.SecurityProtocolType.Tls12;
                SmtpServer.Send(mail);
                smtpMail.Status = "Y";
                SmtpServer.Dispose();
            }
            catch (SmtpFailedRecipientsException ex)
            {
                for (int i = 0; i < ex.InnerExceptions.Length; i++)
                {
                    SmtpStatusCode status = ex.InnerExceptions[i].StatusCode;
                    if (status == SmtpStatusCode.MailboxBusy || status == SmtpStatusCode.MailboxUnavailable)
                    {
                        // Console.WriteLine("Delivery failed - retrying in 5 seconds.");
                        System.Threading.Thread.Sleep(5000);
                        SmtpServer.Send(mail);
                    }
                    else
                    {
                        //  Console.WriteLine("Failed to deliver message to {0}", ex.InnerExceptions[i].FailedRecipient);
                        //throw ex;
                        smtpMail.Status = "N";
                        smtpMail.MsgBody = ex.Message;
                        GetStatic.EmailNotificationLog(smtpMail);
                    }
                }
            }
            catch (Exception ex)
            {
                smtpMail.Status = "N";
                smtpMail.MsgBody = ex.ToString();
                GetStatic.EmailNotificationLog(smtpMail);
            }
            finally
            {
                SmtpServer.Dispose();
            }
            GetStatic.EmailNotificationLog(smtpMail);

            return (smtpMail.Status == "Y") ? "Mail Send" : "Error while sending Email";
        }

        private AlternateView GetEmbeddedImage(List<AttachmentModel> attachmentList, string htmlBody)
        {
            AlternateView alternateView = AlternateView.CreateAlternateViewFromString(htmlBody, null, MediaTypeNames.Text.Html);
            foreach (var item in attachmentList)
            {
                byte[] bytes = System.Convert.FromBase64String(item.Byte64String);
                LinkedResource res = new LinkedResource(new MemoryStream(bytes), item.FileType);
                res.ContentId = item.FileName;
                alternateView.LinkedResources.Add(res);
            }
            return alternateView;
        }
    }
}