from datetime import UTC, date, datetime

import pytest

from app import db
from app.business.presence_service import (
    ArrivalAlreadyOpenError,
    DepartureWithoutArrivalError,
    IdempotencyConflictError,
    InvalidPresenceEventError,
    record_presence_event,
)
from app.models import TimeSlot, WorkEntry, WorkplacePresenceEvent

CONFIG = {
    "timezone": "Europe/Paris",
    "default_day_type": "WORK",
    "default_journey_profile_id": "moteur_seul",
    "default_motor_vehicle_id": "citadine",
}
RECEIVED = datetime(2026, 8, 13, 7, 0, tzinfo=UTC)


def call(session, event_type, occurred_at, key, **kwargs):
    return record_presence_event(session, CONFIG, event_type, occurred_at, key, **kwargs)


def test_arrival_creates_entry_with_defaults_without_commit(app):
    with app.app_context():
        result = call(
            db.session, "arrival", "2026-08-13T08:23:10+02:00", "a-1", received_at=RECEIVED
        )

        entry = db.session.get(WorkEntry, result.entry_id)
        assert result.replayed is False
        assert result.slot_state == "open"
        assert (entry.day_type, entry.journey_profile_id, entry.motor_vehicle_id) == (
            "WORK",
            "moteur_seul",
            "citadine",
        )
        assert db.session.query(WorkplacePresenceEvent).count() == 1
        db.session.rollback()
        assert db.session.query(WorkplacePresenceEvent).count() == 0


def test_departure_completes_both_events(app):
    with app.app_context():
        arrival = call(db.session, "arrival", "2026-08-13T08:00:00+02:00", "a-1")
        departure = call(db.session, "departure", "2026-08-13T17:00:00+02:00", "d-1")
        events = db.session.scalars(
            db.select(WorkplacePresenceEvent).order_by(WorkplacePresenceEvent.id)
        ).all()

        assert departure.time_slot_id is not None
        assert departure.entry_id == arrival.entry_id
        assert all(event.time_slot_id == departure.time_slot_id for event in events)
        assert all(event.processed_at is not None for event in events)
        assert db.session.get(TimeSlot, departure.time_slot_id).start_time.hour == 8


def test_second_pair_same_day_is_supported(app):
    with app.app_context():
        first = call(db.session, "arrival", "2026-08-13T08:00:00+02:00", "a-1")
        call(db.session, "departure", "2026-08-13T12:00:00+02:00", "d-1")
        call(db.session, "arrival", "2026-08-13T13:00:00+02:00", "a-2")
        second = call(db.session, "departure", "2026-08-13T17:00:00+02:00", "d-2")

        assert second.entry_id == first.entry_id
        assert db.session.query(TimeSlot).count() == 2


def test_arrival_is_global_across_days_and_does_not_create_entry(app):
    with app.app_context():
        call(db.session, "arrival", "2026-08-13T08:00:00+02:00", "a-1")

        with pytest.raises(ArrivalAlreadyOpenError):
            call(db.session, "arrival", "2026-08-14T08:00:00+02:00", "a-2")

        assert db.session.query(WorkEntry).count() == 1
        assert db.session.query(WorkplacePresenceEvent).count() == 1
        assert db.session.query(TimeSlot).count() == 0


@pytest.mark.parametrize(
    "departure_at",
    ["2026-08-13T08:00:00+02:00", "2026-08-13T07:59:59+02:00"],
    ids=["equal", "before"],
)
def test_invalid_departure_does_not_create_slot_or_event(app, departure_at):
    with app.app_context():
        call(db.session, "arrival", "2026-08-13T08:00:00+02:00", "a-1")

        with pytest.raises(InvalidPresenceEventError):
            call(db.session, "departure", departure_at, "d-1")

        assert db.session.query(TimeSlot).count() == 0
        assert db.session.query(WorkplacePresenceEvent).count() == 1
        assert (
            db.session.query(WorkplacePresenceEvent).filter_by(event_type="departure").count() == 0
        )


@pytest.mark.parametrize("day_type", ["FORMATION", "GARDE"])
def test_existing_special_day_is_not_modified(app, day_type):
    with app.app_context():
        entry = WorkEntry(
            date=date(2026, 8, 13),
            day_type=day_type,
            journey_profile_id="other-journey",
            motor_vehicle_id="other-car",
        )
        db.session.add(entry)
        db.session.flush()
        result = call(db.session, "arrival", "2026-08-13T08:00:00+02:00", "a-1")
        db.session.refresh(entry)

        assert result.entry_id == entry.id
        assert (entry.day_type, entry.journey_profile_id, entry.motor_vehicle_id) == (
            day_type,
            "other-journey",
            "other-car",
        )


def test_invalid_transitions_and_payloads(app):
    with app.app_context():
        with pytest.raises(ArrivalAlreadyOpenError):
            call(db.session, "arrival", "2026-08-13T08:00:00+02:00", "a-1")
            call(db.session, "arrival", "2026-08-13T09:00:00+02:00", "a-2")
        db.session.rollback()
        with pytest.raises(DepartureWithoutArrivalError):
            call(db.session, "departure", "2026-08-13T09:00:00+02:00", "d-1")
        for event_type, occurred_at, key in (
            ("other", "2026-08-13T09:00:00+02:00", "x"),
            ("arrival", "2026-08-13T09:00:00", "x"),
            ("arrival", "not-a-date", "x"),
            ("arrival", "2026-08-13T09:00:00+02:00", ""),
        ):
            with pytest.raises(InvalidPresenceEventError):
                call(db.session, event_type, occurred_at, key)


def test_departure_after_midnight_is_accepted_as_a_later_instant(app):
    with app.app_context():
        arrival = call(db.session, "arrival", "2026-08-13T23:30:00+00:00", "a-1")
        departure = call(db.session, "departure", "2026-08-14T00:30:00+00:00", "d-1")
        event = db.session.get(WorkplacePresenceEvent, arrival.event_id)
        slot = db.session.get(TimeSlot, departure.time_slot_id)

        assert event.occurred_at == datetime(2026, 8, 14, 1, 30)
        assert event.local_date == date(2026, 8, 14)
        assert (slot.start_time.hour, slot.end_time.hour) == (1, 2)


def test_replay_and_key_conflict(app):
    with app.app_context():
        first = call(db.session, "arrival", "2026-08-13T08:00:00+02:00", "same")
        replay = call(db.session, "arrival", "2026-08-13T08:00:00+02:00", "same")
        assert replay.replayed is True
        assert replay.event_id == first.event_id
        with pytest.raises(IdempotencyConflictError):
            call(db.session, "arrival", "2026-08-13T08:01:00+02:00", "same")