using System.Collections.Generic;
using System.IO;
using System.Net.Mail;
using System.Text;
using System.Threading.Tasks;
using Kreta.Core;
using Kreta.Job.Tasks.Core;
using Kreta.Job.Tasks.Core.Models;

namespace Kreta.Job.Tasks
{
    public class EmailJob : IEmailJob
    {
        private KretaJobConfig KretaJobConfig { get; }

        public EmailJob(KretaJobConfig kretaJobConfig)
        {
            KretaJobConfig = kretaJobConfig;
        }

        public async Task SendMailAsync(EmailModel emailModel)
        {
            if (KretaJobConfig.IsEmailEnabled)
            {
                if (string.IsNullOrWhiteSpace(emailModel.TargetEmail))
                {
                    emailModel.TargetEmail = KretaJobConfig.DefaultEmail;
                }

                if (string.IsNullOrWhiteSpace(emailModel.FromEmail))
                {
                    emailModel.FromEmail = KretaJobConfig.DefaultEmail;
                }

                if (emailModel.TargetEmail.IsValidEmail())
                {
                    var mail = new MailMessage(emailModel.FromEmail, emailModel.TargetEmail)
                    {
                        Subject = emailModel.Subject,
                        SubjectEncoding = Encoding.UTF8,
                        Body = $"{emailModel.Message}{emailModel.Footer}",
                        IsBodyHtml = true,
                        BodyEncoding = Encoding.UTF8,
                        DeliveryNotificationOptions = DeliveryNotificationOptions.OnFailure
                    };

                    if (emailModel.Buffer != null && emailModel.Buffer.Length > 0 && !string.IsNullOrWhiteSpace(emailModel.FileName))
                    {
                        MemoryStream ms = new MemoryStream(emailModel.Buffer);
                        mail.Attachments.Add(new Attachment(ms, emailModel.FileName));
                    }

                    if (!string.IsNullOrWhiteSpace(emailModel.Bcc))
                        mail.Bcc.Add(emailModel.Bcc);

                    using (var client = new SmtpClient())
                    {
                        await client.SendMailAsync(mail);
                    }
                }
            }
        }

        public void SendMailMessages(List<EmailModel> emailJobList)
        {
            if (KretaJobConfig.IsEmailEnabled)
            {
                foreach (var emailModel in emailJobList)
                {

                    if (string.IsNullOrWhiteSpace(emailModel.TargetEmail))
                    {
                        emailModel.TargetEmail = KretaJobConfig.DefaultEmail;
                    }

                    if (string.IsNullOrWhiteSpace(emailModel.FromEmail))
                    {
                        emailModel.FromEmail = KretaJobConfig.DefaultEmail;
                    }

                    if (emailModel.TargetEmail.IsValidEmail())
                    {
                        var mail = new MailMessage(emailModel.FromEmail, emailModel.TargetEmail)
                        {
                            Subject = emailModel.Subject,
                            SubjectEncoding = Encoding.UTF8,
                            Body = $"{emailModel.Message}{emailModel.Footer}",
                            IsBodyHtml = true,
                            BodyEncoding = Encoding.UTF8,
                            DeliveryNotificationOptions = DeliveryNotificationOptions.OnFailure
                        };

                        if (emailModel.Buffer != null && emailModel.Buffer.Length > 0 && !string.IsNullOrWhiteSpace(emailModel.FileName))
                        {
                            MemoryStream ms = new MemoryStream(emailModel.Buffer);
                            mail.Attachments.Add(new Attachment(ms, emailModel.FileName));
                        }

                        if (!string.IsNullOrWhiteSpace(emailModel.Bcc))
                            mail.Bcc.Add(emailModel.Bcc);

                        using (var client = new SmtpClient())
                        {
                            client.Send(mail);
                        }
                    }
                }
            }

        }
    }
}