using MailKit.Net.Smtp;
using MailKit.Security;
using Microsoft.Extensions.Logging;
using Microsoft.Extensions.Options;
using MimeKit;
using MotoresArgentinosV2.Core.Interfaces;
using MotoresArgentinosV2.Core.Models;
using System.Net.Security;

namespace MotoresArgentinosV2.Infrastructure.Services;

public class SmtpEmailService : IEmailService
{
    private readonly MailSettings _mailSettings;
    private readonly ILogger<SmtpEmailService> _logger;

    public SmtpEmailService(IOptions<MailSettings> mailSettings, ILogger<SmtpEmailService> logger)
    {
        _mailSettings = mailSettings.Value;
        _logger = logger;
    }

    public async Task SendEmailAsync(string to, string subject, string htmlBody)
    {
        var email = new MimeMessage();
        email.Sender = new MailboxAddress(_mailSettings.SenderName, _mailSettings.SenderEmail);
        email.From.Add(email.Sender);
        email.To.Add(new MailboxAddress(to, to)); // Usamos el email como nombre si no lo tenemos
        email.Subject = subject;

        var builder = new BodyBuilder { HtmlBody = htmlBody };
        email.Body = builder.ToMessageBody();

        using var smtp = new SmtpClient();
        try
        {
            // Bypass de SSL para red interna / certificados autofirmados
            smtp.ServerCertificateValidationCallback = (sender, certificate, chain, sslPolicyErrors) => true;

            // Conectar
            // SecureSocketOptions.StartTls es lo estándar para puerto 587
            // Si el servidor es muy viejo y no soporta TLS, usa SecureSocketOptions.None
            await smtp.ConnectAsync(_mailSettings.SmtpHost, _mailSettings.SmtpPort, SecureSocketOptions.StartTls);

            // Autenticar
            if (!string.IsNullOrEmpty(_mailSettings.SmtpUser))
            {
                await smtp.AuthenticateAsync(_mailSettings.SmtpUser, _mailSettings.SmtpPass);
            }

            // Enviar
            await smtp.SendAsync(email);
            
            _logger.LogInformation("Email enviado exitosamente a {To}", to);
        }
        catch (Exception ex)
        {
            _logger.LogError(ex, "Error crítico enviando email a {To} mediante MailKit", to);
            // Re-lanzar para que el IdentityService sepa que falló
            throw; 
        }
        finally
        {
            if (smtp.IsConnected)
            {
                await smtp.DisconnectAsync(true);
            }
        }
    }
}