"""Unit tests for point-in-time earnings calendar loading."""
from __future__ import annotations

import datetime as dt
import pyarrow as pa
import pyarrow.parquet as pq

from libs.backtest.earnings_calendar import (
    OraclePointInTimeEarningsCalendar,
    load_pit_earnings_calendar,
)


def test_pit_earnings_calendar_respects_as_of_revisions(tmp_path):
    path = tmp_path / "earnings_calendar_pit.parquet"
    table = pa.Table.from_pylist(
        [
            {
                "symbol": "AMD",
                "as_of_date": "2026-01-05",
                "expected_reaction_date": "2026-01-09",
                "expected_event_date": "2026-01-08",
                "filing_time_bucket": "post_market",
                "is_cancelled": False,
            },
            {
                "symbol": "AMD",
                "as_of_date": "2026-01-07",
                "expected_reaction_date": "2026-01-12",
                "expected_event_date": "2026-01-09",
                "filing_time_bucket": "post_market",
                "is_cancelled": False,
            },
            {
                "symbol": "NVDA",
                "as_of_date": "2026-01-05",
                "expected_reaction_date": "2026-01-09",
                "expected_event_date": "2026-01-08",
                "is_cancelled": True,
            },
        ]
    )
    pq.write_table(table, path)
    load_pit_earnings_calendar.cache_clear()
    calendar = load_pit_earnings_calendar(str(path))

    early = calendar.get_known_upcoming_reaction_dates(
        as_of_date=dt.date(2026, 1, 6),
        allowed_reaction_dates=[dt.date(2026, 1, 9), dt.date(2026, 1, 12)],
    )
    late = calendar.get_known_upcoming_reaction_dates(
        as_of_date=dt.date(2026, 1, 8),
        allowed_reaction_dates=[dt.date(2026, 1, 9), dt.date(2026, 1, 12)],
    )

    assert early == {"AMD": dt.date(2026, 1, 9)}
    assert late == {"AMD": dt.date(2026, 1, 12)}


class _FakeResponse:
    def __init__(self, payload: dict[str, object], status_code: int = 200) -> None:
        self._payload = payload
        self.status_code = status_code

    def raise_for_status(self) -> None:
        if self.status_code >= 400:
            raise RuntimeError(f"http {self.status_code}")

    def json(self) -> dict[str, object]:
        return self._payload


class _FakeSession:
    def __init__(self) -> None:
        self.calls: list[tuple[str, dict[str, object]]] = []

    def post(self, url: str, json: dict[str, object], timeout: float) -> _FakeResponse:
        self.calls.append((url, json))
        return _FakeResponse(
            {
                "entries": [
                    {
                        "symbol": "AMD",
                        "earnings_date": "2026-01-08T21:00:00Z",
                        "earnings_time": "post_market",
                        "estimated_eps": 1.09,
                        "reported_eps": 1.11,
                        "source": "oracle",
                        "fetched_at": "2026-04-02T00:00:00Z",
                    },
                    {
                        "symbol": "CRM",
                        "earnings_date": "2026-01-12T14:00:00Z",
                        "earnings_time": "pre_market",
                        "estimated_eps": 2.22,
                        "reported_eps": 2.30,
                        "source": "oracle",
                        "fetched_at": "2026-04-02T00:00:00Z",
                    },
                ]
            }
        )


def test_oracle_pit_earnings_calendar_uses_bulk_endpoint():
    session = _FakeSession()
    calendar = OraclePointInTimeEarningsCalendar(
        "http://oracle:18001",
        timeout=12.0,
        session=session,
    )

    matches = calendar.get_known_upcoming_reaction_dates(
        as_of_date=dt.date(2026, 1, 6),
        allowed_reaction_dates=[dt.date(2026, 1, 9)],
        symbols=["AMD", "CRM", "NVDA"],
    )

    assert matches == {
        "AMD": dt.date(2026, 1, 9),
    }
    assert len(session.calls) == 1
    url, payload = session.calls[0]
    assert url == "http://oracle:18001/api/v1/earnings/calendar/bulk"
    assert payload["symbols"] == ["AMD", "CRM", "NVDA"]
    assert payload["as_of_date"] == "2026-01-06"
    assert payload["days_ahead"] == 3