using Microsoft.Extensions.Options;
using MimeKit.Text;
using MimeKit;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using MailKit.Net.Smtp;
using Microsoft.AspNetCore.Identity.UI.Services;

namespace StockMan.Data
{
    /// Implementazione interfaccia email con pacchetto MailKIT
    ///
    /// https://www.ryadel.com/en/asp-net-core-send-email-messages-smtp-mailkit/
    /// </summary>
    public class MailKitEmailSender : IEmailSender
    {
        #region Public Constructors

        public MailKitEmailSender(IOptions<MailKitEmailSenderOptions> options)
        {
            this.Options = options.Value;
        }

        #endregion Public Constructors

        #region Public Properties

        public MailKitEmailSenderOptions Options { get; set; }

        #endregion Public Properties

        #region Public Methods

        public Task Execute(string to, string subject, string message)
        {
            // create message
            var email = new MimeMessage();
            email.Sender = MailboxAddress.Parse(Options.Sender_EMail);
            if (!string.IsNullOrEmpty(Options.Sender_Name))
                email.Sender.Name = Options.Sender_Name;
            email.From.Add(email.Sender);
            email.To.Add(MailboxAddress.Parse(to));
            email.Subject = subject;
            email.Body = new TextPart(TextFormat.Html) { Text = message };

            // send email
            using (var smtp = new SmtpClient())
            {
                smtp.Connect(Options.Host_Address, Options.Host_Port, Options.Host_SecureSocketOptions);
                smtp.Authenticate(Options.Host_Username, Options.Host_Password);
                smtp.Send(email);
                smtp.Disconnect(true);
            }

            return Task.FromResult(true);
        }

        public Task SendEmailAsync(string email, string subject, string message)
        {
            return Execute(email, subject, message);
        }

        #endregion Public Methods
    }
}