from __future__ import annotations

import app.core.service as core_module
from app.config import get_settings
from app.core.service import CoreAgentService


class _FakeFreeBusy:
    def __init__(self, payload: dict[str, object]) -> None:
        self.payload = payload
        self.last_query_body: dict[str, object] | None = None

    def query(self, body: dict[str, object]) -> _FakeFreeBusy:
        self.last_query_body = body
        return self

    def execute(self) -> dict[str, object]:
        return self.payload


class _FakeCalendarService:
    def __init__(self, payload: dict[str, object]) -> None:
        self._freebusy = _FakeFreeBusy(payload)

    def freebusy(self) -> _FakeFreeBusy:
        return self._freebusy


def test_core_availability_maps_busy_slots(monkeypatch) -> None:
    payload = {
        "calendars": {
            "primary": {
                "busy": [
                    {
                        "start": "2026-03-10T09:00:00+01:00",
                        "end": "2026-03-10T10:00:00+01:00",
                    }
                ]
            }
        }
    }
    fake_service = _FakeCalendarService(payload)
    monkeypatch.setattr(core_module, "build_calendar_service", lambda _: fake_service)

    service = CoreAgentService(settings=get_settings())
    result = service.check_availability(
        start="2026-03-10T09:00:00+01:00",
        end="2026-03-10T10:00:00+01:00",
        calendar_ids=["primary"],
    )

    assert result.available is False
    assert result.checked_calendars == ["primary"]
    assert len(result.busy_slots) == 1
    assert result.busy_slots[0].calendar_id == "primary"
    assert result.busy_slots[0].start == "2026-03-10T09:00:00+01:00"
    assert result.busy_slots[0].end == "2026-03-10T10:00:00+01:00"