using Application.Models;
using Application.Services;
using MailKit.Net.Smtp;
using Microsoft.Extensions.Configuration;
using MimeKit;
using NSubstitute;

namespace Application.UnitTest.Services;

public class EmailServiceTests
{
    private readonly IConfiguration _configuration = Substitute.For<IConfiguration>();
    private readonly ISmtpClient _smtpClient = Substitute.For<ISmtpClient>();
    private readonly EmailService _sut;

    public EmailServiceTests()
    {
        _configuration["EmailSettings:From"].Returns("sender@gmail.com");
        _configuration["EmailSettings:SmtpServer"].Returns("smtp.gmail.com");
        _configuration["EmailSettings:Password"].Returns("app-password");

        _sut = new EmailService(_configuration, () => _smtpClient);
    }

    [Fact]
    public void SendEmailAsync_ShouldConnectAndAuthenticate()
    {
        var request = new EmailRequest("recipient@example.com", "Test Subject", "<p>Hello</p>");

        _sut.SendEmailAsync(request);

        _smtpClient.Received(1).Connect("smtp.gmail.com", 465, true);
        _smtpClient.Received(1).Authenticate("sender@gmail.com", "app-password");
        _smtpClient.Received(1).Send(Arg.Any<MimeMessage>());
        _smtpClient.Received(1).Disconnect(true);
    }

    [Fact]
    public void SendEmailAsync_ShouldSendMessageWithCorrectDetails()
    {
        var request = new EmailRequest("recipient@example.com", "Welcome!", "<h1>Hi</h1>");

        _sut.SendEmailAsync(request);

        _smtpClient.Received(1).Send(Arg.Is<MimeMessage>(msg =>
            msg.To.Mailboxes.Any(m => m.Address == "recipient@example.com") &&
            msg.Subject == "Welcome!"));
    }

    [Fact]
    public void SendEmailAsync_ShouldDisposeClient_AfterSending()
    {
        var request = new EmailRequest("recipient@example.com", "Subject", "Body");

        _sut.SendEmailAsync(request);

        _smtpClient.Received(1).Disconnect(true);
        _smtpClient.Received(1).Dispose();
    }
}