using dy.net.model.entity;
using MailKit.Net.Smtp;
using MimeKit;

namespace dy.net.service
{
    public interface IEmailNotificationSender
    {
        Task SendAsync(
            EmailNotificationSettings settings,
            string password,
            string subject,
            string htmlBody,
            CancellationToken cancellationToken = default);
    }

    public sealed class EmailNotificationSender : IEmailNotificationSender
    {
        public async Task SendAsync(
            EmailNotificationSettings settings,
            string password,
            string subject,
            string htmlBody,
            CancellationToken cancellationToken = default)
        {
            var message = new MimeMessage();
            message.From.Add(new MailboxAddress(
                string.IsNullOrWhiteSpace(settings.FromName) ? "dysync.net" : settings.FromName,
                settings.FromAddress));
            message.To.AddRange(EmailNotificationSettingsService.ParseRecipients(settings.Recipients));
            message.Subject = subject;
            message.Body = new BodyBuilder { HtmlBody = htmlBody }.ToMessageBody();

            using var client = new SmtpClient();
            client.Timeout = 30_000;
            await client.ConnectAsync(
                settings.Host,
                settings.Port,
                EmailNotificationSettingsService.ToSocketOptions(settings.SecurityMode),
                cancellationToken);
            if (!string.IsNullOrWhiteSpace(settings.UserName))
                await client.AuthenticateAsync(settings.UserName, password ?? string.Empty, cancellationToken);
            await client.SendAsync(message, cancellationToken);
            await client.DisconnectAsync(true, cancellationToken);
        }
    }
}