# ABOUTME: Tests for AnimalService.
# ABOUTME: Integration tests for cohort creation with full transaction.

import time

import pytest

from animaltrack.events.payloads import AnimalCohortCreatedPayload
from animaltrack.events.store import EventStore
from animaltrack.events.types import ANIMAL_COHORT_CREATED
from animaltrack.projections import ProjectionRegistry
from animaltrack.projections.animal_registry import AnimalRegistryProjection
from animaltrack.projections.event_animals import EventAnimalsProjection
from animaltrack.projections.intervals import IntervalProjection
from animaltrack.services.animal import AnimalService, ValidationError


@pytest.fixture
def event_store(seeded_db):
    """Create an EventStore for testing."""
    return EventStore(seeded_db)


@pytest.fixture
def projection_registry(seeded_db):
    """Create a ProjectionRegistry with all cohort projections registered."""
    registry = ProjectionRegistry()
    registry.register(AnimalRegistryProjection(seeded_db))
    registry.register(EventAnimalsProjection(seeded_db))
    registry.register(IntervalProjection(seeded_db))
    return registry


@pytest.fixture
def animal_service(seeded_db, event_store, projection_registry):
    """Create an AnimalService for testing."""
    return AnimalService(seeded_db, event_store, projection_registry)


@pytest.fixture
def valid_location_id(seeded_db):
    """Get a valid location ID from seeds."""
    row = seeded_db.execute("SELECT id FROM locations WHERE name = 'Strip 1'").fetchone()
    return row[0]


def make_payload(
    location_id: str,
    count: int = 5,
    species: str = "duck",
    life_stage: str = "adult",
    sex: str = "unknown",
    origin: str = "purchased",
) -> AnimalCohortCreatedPayload:
    """Create a cohort payload for testing."""
    return AnimalCohortCreatedPayload(
        species=species,
        count=count,
        life_stage=life_stage,
        sex=sex,
        location_id=location_id,
        origin=origin,
    )


class TestAnimalServiceCreateCohort:
    """Tests for create_cohort()."""

    def test_creates_event(self, seeded_db, animal_service, valid_location_id):
        """create_cohort creates an AnimalCohortCreated event."""
        payload = make_payload(valid_location_id, count=3)
        ts_utc = int(time.time() * 1000)

        event = animal_service.create_cohort(payload, ts_utc, "test_user")

        assert event.type == ANIMAL_COHORT_CREATED
        assert event.actor == "test_user"
        assert event.ts_utc == ts_utc

    def test_event_has_animal_ids_in_entity_refs(
        self, seeded_db, animal_service, valid_location_id
    ):
        """Event entity_refs contains generated animal_ids list."""
        payload = make_payload(valid_location_id, count=5)
        ts_utc = int(time.time() * 1000)

        event = animal_service.create_cohort(payload, ts_utc, "test_user")

        assert "animal_ids" in event.entity_refs
        assert len(event.entity_refs["animal_ids"]) == 5
        # Verify all IDs are ULIDs (26 chars)
        for animal_id in event.entity_refs["animal_ids"]:
            assert len(animal_id) == 26

    def test_event_has_location_in_entity_refs(self, seeded_db, animal_service, valid_location_id):
        """Event entity_refs contains location_id."""
        payload = make_payload(valid_location_id, count=1)
        ts_utc = int(time.time() * 1000)

        event = animal_service.create_cohort(payload, ts_utc, "test_user")

        assert "location_id" in event.entity_refs
        assert event.entity_refs["location_id"] == valid_location_id

    def test_animals_created_in_registry(self, seeded_db, animal_service, valid_location_id):
        """Animals are created in animal_registry table."""
        payload = make_payload(valid_location_id, count=3)
        ts_utc = int(time.time() * 1000)

        event = animal_service.create_cohort(payload, ts_utc, "test_user")

        # Check animals exist in registry
        count = seeded_db.execute("SELECT COUNT(*) FROM animal_registry").fetchone()[0]
        assert count == 3

        # Check each generated animal_id is in the registry
        for animal_id in event.entity_refs["animal_ids"]:
            row = seeded_db.execute(
                "SELECT animal_id FROM animal_registry WHERE animal_id = ?",
                (animal_id,),
            ).fetchone()
            assert row is not None

    def test_correct_number_of_animals_created(self, seeded_db, animal_service, valid_location_id):
        """Number of animals matches payload.count."""
        payload = make_payload(valid_location_id, count=7)
        ts_utc = int(time.time() * 1000)

        animal_service.create_cohort(payload, ts_utc, "test_user")

        count = seeded_db.execute("SELECT COUNT(*) FROM animal_registry").fetchone()[0]
        assert count == 7

    def test_event_animal_links_created(self, seeded_db, animal_service, valid_location_id):
        """Event-animal links are created."""
        payload = make_payload(valid_location_id, count=4)
        ts_utc = int(time.time() * 1000)

        event = animal_service.create_cohort(payload, ts_utc, "test_user")

        # Check event_animals has 4 rows
        count = seeded_db.execute(
            "SELECT COUNT(*) FROM event_animals WHERE event_id = ?",
            (event.id,),
        ).fetchone()[0]
        assert count == 4

    def test_location_intervals_created(self, seeded_db, animal_service, valid_location_id):
        """Location intervals are created for each animal."""
        payload = make_payload(valid_location_id, count=3)
        ts_utc = int(time.time() * 1000)

        animal_service.create_cohort(payload, ts_utc, "test_user")

        count = seeded_db.execute("SELECT COUNT(*) FROM animal_location_intervals").fetchone()[0]
        assert count == 3

    def test_attr_intervals_created(self, seeded_db, animal_service, valid_location_id):
        """Attribute intervals are created for each animal."""
        payload = make_payload(valid_location_id, count=2)
        ts_utc = int(time.time() * 1000)

        animal_service.create_cohort(payload, ts_utc, "test_user")

        # 2 animals * 4 attrs = 8 intervals
        count = seeded_db.execute("SELECT COUNT(*) FROM animal_attr_intervals").fetchone()[0]
        assert count == 8

    def test_live_animals_created(self, seeded_db, animal_service, valid_location_id):
        """Live animals are created in live_animals_by_location."""
        payload = make_payload(valid_location_id, count=5)
        ts_utc = int(time.time() * 1000)

        animal_service.create_cohort(payload, ts_utc, "test_user")

        count = seeded_db.execute("SELECT COUNT(*) FROM live_animals_by_location").fetchone()[0]
        assert count == 5

    def test_event_stored_in_events_table(self, seeded_db, animal_service, valid_location_id):
        """Event is stored in events table."""
        payload = make_payload(valid_location_id, count=1)
        ts_utc = int(time.time() * 1000)

        event = animal_service.create_cohort(payload, ts_utc, "test_user")

        # Verify event exists in database
        row = seeded_db.execute(
            "SELECT id FROM events WHERE id = ?",
            (event.id,),
        ).fetchone()
        assert row is not None


class TestAnimalServiceValidation:
    """Tests for create_cohort() validation."""

    def test_rejects_nonexistent_location(self, seeded_db, animal_service):
        """Raises ValidationError for non-existent location_id."""
        # Use a valid ULID format but non-existent location
        fake_location_id = "01ARZ3NDEKTSV4RRFFQ69G5XXX"
        payload = make_payload(fake_location_id, count=1)
        ts_utc = int(time.time() * 1000)

        with pytest.raises(ValidationError, match="not found"):
            animal_service.create_cohort(payload, ts_utc, "test_user")

    def test_rejects_archived_location(self, seeded_db, animal_service):
        """Raises ValidationError for archived location."""
        # First, create and archive a location
        from animaltrack.id_gen import generate_id

        location_id = generate_id()
        ts = int(time.time() * 1000)
        seeded_db.execute(
            """INSERT INTO locations (id, name, active, created_at_utc, updated_at_utc)
               VALUES (?, 'Archived Test', 0, ?, ?)""",
            (location_id, ts, ts),
        )

        payload = make_payload(location_id, count=1)
        ts_utc = int(time.time() * 1000)

        with pytest.raises(ValidationError, match="archived"):
            animal_service.create_cohort(payload, ts_utc, "test_user")

    def test_rejects_inactive_species(self, seeded_db, animal_service, valid_location_id):
        """Raises ValidationError for inactive species."""
        # First, deactivate duck species
        seeded_db.execute("UPDATE species SET active = 0 WHERE code = 'duck'")

        payload = make_payload(valid_location_id, count=1, species="duck")
        ts_utc = int(time.time() * 1000)

        with pytest.raises(ValidationError, match="not active"):
            animal_service.create_cohort(payload, ts_utc, "test_user")


class TestAnimalServiceTransactionIntegrity:
    """Tests for transaction integrity."""

    def test_no_partial_data_on_projection_error(self, seeded_db, event_store, valid_location_id):
        """If projection fails, event is not persisted."""
        # Create a registry with a failing projection
        from animaltrack.projections import Projection, ProjectionError

        class FailingProjection(Projection):
            def get_event_types(self):
                return [ANIMAL_COHORT_CREATED]

            def apply(self, event):
                raise ProjectionError("Intentional failure")

            def revert(self, event):
                pass

        registry = ProjectionRegistry()
        registry.register(AnimalRegistryProjection(seeded_db))
        registry.register(FailingProjection(seeded_db))

        service = AnimalService(seeded_db, event_store, registry)
        payload = make_payload(valid_location_id, count=2)
        ts_utc = int(time.time() * 1000)

        with pytest.raises(ProjectionError):
            service.create_cohort(payload, ts_utc, "test_user")

        # Verify nothing was persisted
        event_count = seeded_db.execute("SELECT COUNT(*) FROM events").fetchone()[0]
        assert event_count == 0

        animal_count = seeded_db.execute("SELECT COUNT(*) FROM animal_registry").fetchone()[0]
        assert animal_count == 0