using System;
using System.Collections.Generic;
using System.Net.Mail;
using System.Text;
using Neo.Afx.ComponentModel;

namespace Neo.Afx.WinService.Messages
{
    public static class Pop3Extensions
    {
        public static Pop3Message ToPop3Message(this Lesnikowski.Mail.SimpleMailMessage pop3Message)
        {
            var message = new Pop3Message
            {
                Bcc = pop3Message.Bcc.ToStringSafe(), 
                CC = Extensions.ToStringSafe(pop3Message.Cc), 
                From = Extensions.ToStringSafe(pop3Message.From), 
                ReplyTo = Extensions.ToStringSafe(pop3Message.ReplyTo), 
                Sender = Extensions.ToStringSafe(pop3Message.Sender), 
                To = Extensions.ToStringSafe(pop3Message.To), 
                Priority = pop3Message.Importance.ToPriority(), 
                DateSent = pop3Message.Date, 
                Subject = pop3Message.Subject, 
                IsBodyHtml = pop3Message.HtmlData != null, 
                Body = pop3Message.HtmlData == null ? pop3Message.TextDataString : pop3Message.HtmlDataString, 
                Attachments = pop3Message.GetAttachments()
            };

            return message;
        }

        #region GetAttachments

        public static List<FileObject> GetAttachments(this Lesnikowski.Mail.SimpleMailMessage mail)
        {
            var attachments = new List<FileObject>();

            var n = 0;
            for(var i = 0; i < mail.Attachments.Count; i++, n++)
            {
                attachments.Add(mail.Attachments[i].ToFileObject(n));
            }

            if(mail.Visuals != null && mail.Visuals.Count > 0)
            {
                for(var i = 0; i < mail.Visuals.Count; i++, n++)
                {
                    attachments.Add(mail.Visuals[i].ToFileObject(n));
                }
            }

            return attachments;
        }

        #endregion

        #region ToFileObject

        public static FileObject ToFileObject(this Lesnikowski.Mail.MimeData mailAttachment, int n)
        {
            var buffer = mailAttachment.Data;
            var mimetype = mailAttachment.ContentType.TypeName + "/" + mailAttachment.ContentType.SubtypeName;
            var fileName = mailAttachment.ContentDisposition.FileName;
            string extension;
            if(String.IsNullOrEmpty(fileName))
            {
                extension = mailAttachment.ContentType.SubtypeName;
                fileName = mailAttachment.ContentType.TypeName + n;
            }
            else
            {
                extension = fileName.Substring((fileName.LastIndexOf('.')), (fileName.Length - fileName.LastIndexOf('.')));
                extension = extension.Remove(0, 1);
                fileName = fileName.Remove(fileName.LastIndexOf('.'), (fileName.Length - fileName.LastIndexOf('.')));
            }

            return new FileObject
            {
                Content = buffer,
                Length = buffer.LongLength,
                MimeType = mimetype,
                Extension = extension,
                Name = fileName,
                FullName = fileName + "." + extension
            };
        }

        #endregion

        #region ToPriority

        public static MailPriority ToPriority(this Lesnikowski.Mail.Importance importance)
        {
            switch(importance)
            {
                case Lesnikowski.Mail.Importance.High:
                    return MailPriority.High;

                case Lesnikowski.Mail.Importance.Low:
                    return MailPriority.Low;

                case Lesnikowski.Mail.Importance.Normal:
                    return MailPriority.Normal;
            }

            return MailPriority.Normal;
        }

        #endregion

        #region ToStringSafe

        public static string ToStringSafe(this Lesnikowski.Mail.MailBox mailBox)
        {
            return mailBox != null ? mailBox.Address : null;
        }

        public static string ToStringSafe(this Lesnikowski.Mail.MailBoxList mailBoxList)
        {
            if(mailBoxList != null && mailBoxList.Count > 0)
            {
                var sb = new StringBuilder();
                foreach(var mailBox in mailBoxList)
                {
                    if(sb.Length > 0)
                    {
                        sb.Append(Pop3Message.AddressSeparator);
                    }
                    sb.Append(mailBox.ToStringSafe());
                }
                return sb.ToString();
            }
            return null;
        }

        #endregion

    }
}