import pytest
from plants.models import Species, Plant, PruningLog
from datetime import date


@pytest.mark.django_db
def test_species_str():
    s = Species.objects.create(common_name='Rose')
    assert str(s) == 'Rose'


@pytest.mark.django_db
def test_plant_str():
    p = Plant.objects.create(name='Kitchen Fern', location='Kitchen')
    assert str(p) == 'Kitchen Fern'


@pytest.mark.django_db
def test_plant_species_nullable():
    p = Plant.objects.create(name='Unknown plant', location='Hallway')
    assert p.species is None


@pytest.mark.django_db
def test_pruning_log_str():
    p = Plant.objects.create(name='Rose', location='Garden')
    log = PruningLog.objects.create(plant=p, pruned_on=date(2026, 5, 1))
    assert 'Rose' in str(log)
    assert '2026-05-01' in str(log)


@pytest.mark.django_db
def test_plant_pruning_months_default():
    p = Plant.objects.create(name='Fern', location='Office')
    assert p.pruning_months == []


@pytest.mark.django_db
def test_species_pruning_months_default():
    s = Species.objects.create(common_name='Oak')
    assert s.pruning_months == []


@pytest.mark.django_db
def test_delete_species_nulls_plant_species():
    s = Species.objects.create(common_name='Rose')
    p = Plant.objects.create(name='Garden rose', location='Garden', species=s)
    s.delete()
    p.refresh_from_db()
    assert p.species is None