using FrameworkDAL.DTO.MessageHub.MessageHubGenerator;
using GB5Shared.DTO.Framework.Login;
using Microsoft.Extensions.Logging;
using Microsoft.Extensions.Options;
using System;
using System.Net;
using System.Net.Mail;
using System.Threading;
using System.Threading.Tasks;

namespace FrameworkBLL.MessageHub.MessageHubPlatforms
{
    public class EmailPlatform : IMessageHubPlatform.IEmailPlatform
    {
        private readonly ILogger<EmailPlatform> _logger;
        private readonly EmailSettings _settings;

        public EmailPlatform(
            ILogger<EmailPlatform> logger,
            IOptions<EmailSettings> settings)
        {
            _logger = logger;
            _settings = settings.Value;
        }

        public async Task SendEmailConversation(
            MessageHubDTO dto,
            LoginDTO loginContext,
            CancellationToken ct)
        {
            if (ct.IsCancellationRequested)
                throw new OperationCanceledException();

            try
            {
                using var smtpClient = new SmtpClient(_settings.Host, _settings.Port)
                {
                    Credentials = new NetworkCredential(_settings.Username, _settings.Password),
                    EnableSsl = _settings.EnableSSL
                };

                using var mailMessage = new MailMessage
                {
                    From = new MailAddress(_settings.FromEmail, _settings.FromName),
                    Subject = dto.Subject ?? "Notification",
                    Body = dto.MessageText,
                    IsBodyHtml = true
                };

                mailMessage.To.Add(dto.Recipient);

                await smtpClient.SendMailAsync(mailMessage, ct);

                _logger.LogInformation(
                    "Email sent successfully | To={Recipient} | User={UserId}",
                    dto.Recipient,
                    loginContext?.UserId);
            }
            catch (Exception ex)
            {
                _logger.LogError(ex,
                    "Email sending failed | To={Recipient}",
                    dto.Recipient);
                throw;
            }
        }
    }

    #region Settings Class

    public class EmailSettings
    {
        public string Host { get; set; }
        public int Port { get; set; }
        public string Username { get; set; }
        public string Password { get; set; }
        public bool EnableSSL { get; set; }
        public string FromEmail { get; set; }
        public string FromName { get; set; }
    }

    #endregion
}