using NSubstitute;
using SIGCM2.Application.Abstractions.Persistence;
using SIGCM2.Application.Audit;
using SIGCM2.Application.Secciones.Create;
using SIGCM2.Domain.Entities;
using SIGCM2.Domain.Exceptions;

namespace SIGCM2.Application.Tests.Secciones.Create;

public class CreateSeccionCommandHandlerTests
{
    private readonly ISeccionRepository _repo = Substitute.For<ISeccionRepository>();
    private readonly IMedioRepository _medioRepo = Substitute.For<IMedioRepository>();
    private readonly IAuditLogger _audit = Substitute.For<IAuditLogger>();
    private readonly CreateSeccionCommandHandler _handler;

    private static Medio MakeMedio(int id = 1, bool activo = true) =>
        new(id, "COD" + id, "Medio " + id, TipoMedio.Diario, null, activo, DateTime.UtcNow, null);

    private static CreateSeccionCommand ValidCommand() => new(
        MedioId: 1,
        Codigo: "CLASIFICADOS_LUNES",
        Nombre: "Clasificados Lunes",
        Tipo: "clasificados");

    public CreateSeccionCommandHandlerTests()
    {
        _handler = new CreateSeccionCommandHandler(_repo, _medioRepo, _audit);
        _medioRepo.GetByIdAsync(1, Arg.Any<CancellationToken>()).Returns(MakeMedio(1));
        _repo.ExistsByCodigoInMedioAsync(Arg.Any<int>(), Arg.Any<string>(), Arg.Any<CancellationToken>()).Returns(false);
        _repo.AddAsync(Arg.Any<Seccion>(), Arg.Any<CancellationToken>()).Returns(10);
    }

    // ── medio not found → throws ─────────────────────────────────────────────

    [Fact]
    public async Task Handle_MedioNotFound_ThrowsMedioNotFoundException()
    {
        _medioRepo.GetByIdAsync(1, Arg.Any<CancellationToken>()).Returns((Medio?)null);

        await Assert.ThrowsAsync<MedioNotFoundException>(
            () => _handler.Handle(ValidCommand()));
    }

    // ── duplicate codigo in medio → throws ──────────────────────────────────

    [Fact]
    public async Task Handle_DuplicateCodigoInMedio_ThrowsSeccionCodigoDuplicadoEnMedioException()
    {
        _repo.ExistsByCodigoInMedioAsync(1, "CLASIFICADOS_LUNES", Arg.Any<CancellationToken>()).Returns(true);

        await Assert.ThrowsAsync<SeccionCodigoDuplicadoEnMedioException>(
            () => _handler.Handle(ValidCommand()));
    }

    [Fact]
    public async Task Handle_DuplicateCodigo_DoesNotCallAddAsync()
    {
        _repo.ExistsByCodigoInMedioAsync(Arg.Any<int>(), Arg.Any<string>(), Arg.Any<CancellationToken>()).Returns(true);

        try { await _handler.Handle(ValidCommand()); } catch (SeccionCodigoDuplicadoEnMedioException) { }

        await _repo.DidNotReceive().AddAsync(Arg.Any<Seccion>(), Arg.Any<CancellationToken>());
    }

    // ── happy path ───────────────────────────────────────────────────────────

    [Fact]
    public async Task Handle_HappyPath_ReturnsDtoWithIdFromRepository()
    {
        _repo.AddAsync(Arg.Any<Seccion>(), Arg.Any<CancellationToken>()).Returns(10);

        var result = await _handler.Handle(ValidCommand());

        Assert.Equal(10, result.Id);
    }

    [Fact]
    public async Task Handle_HappyPath_DtoContainsCorrectFields()
    {
        var result = await _handler.Handle(ValidCommand());

        Assert.Equal(1, result.MedioId);
        Assert.Equal("CLASIFICADOS_LUNES", result.Codigo);
        Assert.Equal("Clasificados Lunes", result.Nombre);
        Assert.Equal("clasificados", result.Tipo);
        Assert.True(result.Activo);
    }

    [Fact]
    public async Task Handle_HappyPath_CallsAuditWithCreateAction()
    {
        _repo.AddAsync(Arg.Any<Seccion>(), Arg.Any<CancellationToken>()).Returns(10);

        await _handler.Handle(ValidCommand());

        await _audit.Received(1).LogAsync(
            action: "seccion.create",
            targetType: "Seccion",
            targetId: "10",
            metadata: Arg.Any<object?>(),
            ct: Arg.Any<CancellationToken>());
    }

    [Fact]
    public async Task Handle_InactiveMedio_ThrowsMedioNotFoundException()
    {
        _medioRepo.GetByIdAsync(1, Arg.Any<CancellationToken>()).Returns(MakeMedio(1, false));

        await Assert.ThrowsAsync<MedioNotFoundException>(
            () => _handler.Handle(ValidCommand()));
    }
}