"""CAL_ICS_PATH: a locally hosted install can auto-complete the conflict-check
step — _load_busy falls back to the env-pointed .ics when nothing is uploaded."""
from calendar_out.ics import events_to_ics
from server.schema import Event
from ui import blocks


def _sample_ics_bytes() -> bytes:
    return events_to_ics([
        Event(title="Dentist", start="2026-06-18T09:00:00", end="2026-06-18T10:00:00"),
    ])


def test_load_busy_env_fallback(tmp_path, monkeypatch):
    ics = tmp_path / "cal.ics"
    ics.write_bytes(_sample_ics_bytes())
    monkeypatch.setenv("CAL_ICS_PATH", str(ics))
    busy = blocks._load_busy(None)
    assert len(busy) == 1
    assert busy[0].title == "Dentist"


def test_load_busy_upload_overrides_env(tmp_path, monkeypatch):
    env_ics = tmp_path / "env.ics"
    env_ics.write_bytes(_sample_ics_bytes())
    upload = tmp_path / "upload.ics"
    upload.write_bytes(events_to_ics([
        Event(title="Soccer", start="2026-06-19T17:00:00", end="2026-06-19T18:00:00"),
    ]))
    monkeypatch.setenv("CAL_ICS_PATH", str(env_ics))
    busy = blocks._load_busy(str(upload))
    assert [b.title for b in busy] == ["Soccer"]


def test_load_busy_unset_env_is_empty(monkeypatch):
    monkeypatch.delenv("CAL_ICS_PATH", raising=False)
    assert blocks._load_busy(None) == []