/*
 * This work is licensed under the Creative Commons Attribution 2.5 License. 
 * To view a copy of this license, visit http://creativecommons.org/licenses/by/2.5/
 * or send a letter to Creative Commons, 543 Howard Street, 5th Floor, 
 * San Francisco, California, 94105, USA.
 * 
 * Original developer: David Betz <dfb@davidbetz.net>
 * 
*/

using System;
using System.Text;
using System.Net;
using System.Net.Mail;
using System.Collections.Generic;
using System.Net.Mime;
using System.IO;

namespace General.Mail
{
    public static class Notification
    {
        //- $AssignBcc -//
        private static void AssignBcc(MailMessage email, String bcc)
        {
            if (!String.IsNullOrEmpty(bcc))
            {
                foreach (String address in bcc.Split(",".ToCharArray()))
                {
                    email.Bcc.Add(address);
                }
            }
        }

        //- $AssignCc -//
        private static void AssignCc(MailMessage email, String cc)
        {
            if (!String.IsNullOrEmpty(cc))
            {
                foreach (String address in cc.Split(",".ToCharArray()))
                {
                    email.CC.Add(address);
                }
            }
        }

        //- $AssignAttachments -//
        private static void AssignAttachments(MailMessage email, List<String> attachmentPaths)
        {
            if (attachmentPaths != null)
            {
                foreach (String file in attachmentPaths)
                {
                    email.Attachments.Add(new Attachment(file));
                }
            }
        }

        //- $InternalSend -//
        private static void InternalSend(String from, String to, String cc, String bcc, String subject, DateTime datetime, String body, List<String> attachmentPaths, Boolean useSecureGmail)
        {
            using (MailMessage email = new MailMessage(from, to))
            {
                email.Subject = subject;
                email.Body = body;
                email.IsBodyHtml = true;
                //+
                AssignCc(email, cc);
                AssignBcc(email, bcc);
                AssignAttachments(email, attachmentPaths);
                //+
                SmtpClient mailClient = new SmtpClient();
                if (useSecureGmail)
                {
                    mailClient.Host = "smtp.gmail.com";
                    mailClient.Port = 587;
                    mailClient.Credentials = new NetworkCredential(StaticConfiguration.SmtpSecureGmailUserName, StaticConfiguration.SmtpSecureGmailPassword);
                    mailClient.EnableSsl = true;
                }
                else
                {
                    String userName = StaticConfiguration.SmtpUserName;
                    String password = StaticConfiguration.SmtpPassword;
                    String server = StaticConfiguration.SmtpServer;
                    NetworkCredential basicAuthenticationInfo = new NetworkCredential(userName, password);
                    mailClient.Host = server;
                    mailClient.UseDefaultCredentials = false;
                    mailClient.Credentials = basicAuthenticationInfo;
                }
                mailClient.Send(email);
            }
        }

        //- @SendViaSecureGmail -//
        public static void SendViaSecureGmail(String from, String to, String subject, String body)
        {
            InternalSend(from, to, null, null, subject, DateTime.Now, body, null, true);
        }

        //- @SendViaSecureGmail -//
        public static void SendViaSecureGmail(String from, String to, String cc, String bcc, String subject, DateTime datetime, String body, List<String> attachmentPaths)
        {
            InternalSend(from, to, cc, bcc, subject, datetime, body, attachmentPaths, true);
        }

        //- @Send -//
        public static void Send(String from, String to, String subject, String body)
        {
            if (StaticConfiguration.AlwaysUseSecureGmail)
            {
                InternalSend(from, to, null, null, subject, DateTime.Now, body, null, true);
            }
            else
            {
                InternalSend(from, to, null, null, subject, DateTime.Now, body, null, false);
            }
        }

        //- @Send -//
        public static void Send(String from, String to, String cc, String bcc, String subject, DateTime datetime, String body, List<String> attachmentPaths)
        {
            if (StaticConfiguration.AlwaysUseSecureGmail)
            {
                InternalSend(from, to, cc, bcc, subject, datetime, body, attachmentPaths, true);
            }
            else
            {
                InternalSend(from, to, cc, bcc, subject, datetime, body, attachmentPaths, false);
            }
        }

        //- @WrapAndSend -//
        public static void WrapAndSend(String from, String to, String subject, String body)
        {
            StringBuilder builder = new StringBuilder();
            builder.AppendLine("<!DOCTYPE html PUBLIC \"-//W3C//DTD XHTML 1.0 Transitional//EN\"");
            builder.AppendLine("	\"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd\">");
            builder.AppendLine("<html xmlns=\"http://www.w3.org/1999/xhtml\" xml:lang=\"en\" >");
            builder.AppendLine("<head>");
            builder.AppendLine("<title>" + StaticConfiguration.Subject + " Notification</title>");
            builder.AppendLine("<style type=\"text/css\">");
            builder.AppendLine("body {font-size:76%; font-family: verdana, sans-serif; }");
            builder.AppendLine("</style>");
            builder.AppendLine("</head>");
            builder.AppendLine("<body>");
            builder.AppendLine(body);
            builder.AppendLine("</body>");
            builder.AppendLine("</html>");
            //+
            if (StaticConfiguration.AlwaysUseSecureGmail)
            {
                Notification.SendViaSecureGmail(from, to, subject, builder.ToString());
            }
            else
            {
                Notification.Send(from, to, subject, builder.ToString());
            }
        }

    }
}