"""Autonomous idempotency (server/dedup.py)."""
import pytest

from server import dedup
from server.schema import Event


@pytest.fixture(autouse=True)
def _clean():
    dedup.reset()
    yield
    dedup.reset()


def _ev(title="Dinner", start="2026-06-06T18:00:00"):
    return Event(title=title, start=start)


def test_filter_new_drops_repeats_across_calls():
    first = dedup.filter_new([_ev()])
    assert len(first) == 1
    second = dedup.filter_new([_ev()])
    assert second == []  # same event, already seen


def test_filter_new_keeps_distinct():
    dedup.filter_new([_ev()])
    out = dedup.filter_new([_ev(title="Lunch", start="2026-06-07T12:00:00")])
    assert len(out) == 1


def test_event_key_normalizes_title_and_minute():
    a = dedup.event_key(_ev(title="  Dinner ", start="2026-06-06T18:00:00"))
    b = dedup.event_key(_ev(title="dinner", start="2026-06-06T18:00:30"))
    assert a == b  # case/space-insensitive, start rounded to the minute


def test_mixed_batch_returns_only_new():
    dedup.filter_new([_ev()])
    out = dedup.filter_new([_ev(), _ev(title="New", start="2026-06-08T09:00:00")])
    assert [e.title for e in out] == ["New"]