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

namespace SIGCM2.Application.Tests.Secciones.Update;

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

    private static Seccion MakeSeccion(int id = 1, string nombre = "Original", string tipo = "clasificados")
        => new(id, 1, "COD" + id, nombre, tipo, true, DateTime.UtcNow, null);

    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 UpdateSeccionCommand ValidCommand(int id = 1) => new(
        Id: id,
        Nombre: "Nuevo Nombre",
        Tipo: "notables");

    public UpdateSeccionCommandHandlerTests()
    {
        _handler = new UpdateSeccionCommandHandler(_repo, _medioRepo, _audit, TimeProvider.System);
        // Default: medio is active
        _medioRepo.GetByIdAsync(Arg.Any<int>(), Arg.Any<CancellationToken>()).Returns(MakeMedio(1, true));
    }

    [Fact]
    public async Task Handle_NotFound_ThrowsSeccionNotFoundException()
    {
        _repo.GetByIdAsync(999, Arg.Any<CancellationToken>()).Returns((Seccion?)null);

        await Assert.ThrowsAsync<SeccionNotFoundException>(
            () => _handler.Handle(new UpdateSeccionCommand(999, "X", "clasificados")));
    }

    [Fact]
    public async Task Handle_HappyPath_CallsUpdateAsyncOnce()
    {
        _repo.GetByIdAsync(1, Arg.Any<CancellationToken>()).Returns(MakeSeccion(1));

        await _handler.Handle(ValidCommand(1));

        await _repo.Received(1).UpdateAsync(Arg.Any<Seccion>(), Arg.Any<CancellationToken>());
    }

    [Fact]
    public async Task Handle_HappyPath_ReturnsDtoWithUpdatedFields()
    {
        _repo.GetByIdAsync(1, Arg.Any<CancellationToken>()).Returns(MakeSeccion(1, "Original", "clasificados"));

        var result = await _handler.Handle(ValidCommand(1));

        Assert.Equal(1, result.Id);
        Assert.Equal("Nuevo Nombre", result.Nombre);
        Assert.Equal("notables", result.Tipo);
    }

    [Fact]
    public async Task Handle_HappyPath_CallsAuditWithUpdateAction()
    {
        _repo.GetByIdAsync(1, Arg.Any<CancellationToken>()).Returns(MakeSeccion(1));

        await _handler.Handle(ValidCommand(1));

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

    [Fact]
    public async Task Handle_MedioInactivo_ThrowsMedioInactivoExceptionAndNoAuditLogged()
    {
        _repo.GetByIdAsync(1, Arg.Any<CancellationToken>()).Returns(MakeSeccion(1));
        _medioRepo.GetByIdAsync(1, Arg.Any<CancellationToken>()).Returns(MakeMedio(1, activo: false));

        await Assert.ThrowsAsync<MedioInactivoException>(
            () => _handler.Handle(ValidCommand(1)));

        await _audit.DidNotReceive().LogAsync(
            Arg.Any<string>(), Arg.Any<string>(), Arg.Any<string>(),
            Arg.Any<object?>(), Arg.Any<CancellationToken>());
    }
}
