using CvMatcher.Models.Settings;
using Api.Services.Contracts;
using MailKit.Net.Smtp;
using MailKit.Security;
using Microsoft.Extensions.Options;
using MimeKit;

namespace Api.Services;

public sealed class EmailService : IEmailService
{
    private readonly SmtpSettings _settings;
    private readonly ILogger<EmailService> _logger;

    public EmailService(IOptions<SmtpSettings> options, ILogger<EmailService> logger)
    {
        _settings = options.Value;
        _logger = logger;
    }

    public async Task SendMatchAsync(string? explicitTo, string subject, string body, CancellationToken ct)
    {
        var to = !string.IsNullOrWhiteSpace(explicitTo) ? explicitTo : _settings.ToEmail;
        if (string.IsNullOrWhiteSpace(_settings.Host) || string.IsNullOrWhiteSpace(to))
        {
            _logger.LogInformation("SMTP is not configured. Skipping CV matcher email.");
            return;
        }

        var message = new MimeMessage();
        message.From.Add(MailboxAddress.Parse(_settings.FromEmail));
        message.To.Add(MailboxAddress.Parse(to));
        message.Subject = subject;
        message.Body = new TextPart("plain") { Text = body };

        using var client = new SmtpClient();
        var secureSocket = _settings.UseStartTls ? SecureSocketOptions.StartTls : SecureSocketOptions.Auto;
        await client.ConnectAsync(_settings.Host, _settings.Port, secureSocket, ct);
        if (!string.IsNullOrWhiteSpace(_settings.Username))
        {
            await client.AuthenticateAsync(_settings.Username, _settings.Password, ct);
        }
        await client.SendAsync(message, ct);
        await client.DisconnectAsync(true, ct);
    }
}