"""Integration tests for the series/season ingestion pipeline (section 15).
A fake provider stands in for TMDb so these run without network access,
while still exercising the real normalize -> match -> upsert -> provenance
path against PostgreSQL."""

from __future__ import annotations

from typing import Any

import pytest
from sqlalchemy import select
from sqlalchemy.ext.asyncio import AsyncSession

from app.models.tv import Episode, Season, Series
from app.providers.base import MetadataProvider, ProviderNotFoundError
from app.services.ingestion.series_ingestion import ingest_season, ingest_series
from tests.unit.test_normalizer import FAKE_SEASON, FAKE_SERIES


class FakeTMDbSeriesProvider(MetadataProvider):
    slug = "tmdb"
    name = "The Movie Database (TMDb)"

    def __init__(self, series_payload: dict[str, Any], season_payload: dict[str, Any]) -> None:
        self._series_payload = series_payload
        self._season_payload = season_payload

    async def get_movie(self, external_id: str) -> dict[str, Any]:
        raise NotImplementedError

    async def get_series(self, external_id: str) -> dict[str, Any]:
        return self._series_payload

    async def get_season(self, series_external_id: str, season_number: int) -> dict[str, Any]:
        return self._season_payload

    async def get_person(self, external_id: str) -> dict[str, Any]:
        raise NotImplementedError

    async def search_movie(self, query: str) -> list[dict[str, Any]]:
        raise NotImplementedError


@pytest.mark.asyncio
async def test_ingest_series_creates_series_and_season_stubs(db_session: AsyncSession):
    provider = FakeTMDbSeriesProvider(FAKE_SERIES, FAKE_SEASON)

    series_id = await ingest_series(db_session, provider, "1396")
    await db_session.commit()

    series = await db_session.get(Series, series_id)
    assert series is not None
    assert series.title == "Ozymandias"
    assert series.status.value == "ended"

    seasons = (
        (await db_session.execute(select(Season).where(Season.series_id == series_id)))
        .scalars()
        .all()
    )
    season_numbers = sorted(s.season_number for s in seasons)
    assert season_numbers == [0, 1]
    # Season stubs have no episodes yet — that's ingest_season's job.
    for season in seasons:
        result = await db_session.execute(select(Episode).where(Episode.season_id == season.id))
        assert result.scalars().first() is None


@pytest.mark.asyncio
async def test_ingest_season_requires_series_ingested_first(db_session: AsyncSession):
    provider = FakeTMDbSeriesProvider(FAKE_SERIES, FAKE_SEASON)

    with pytest.raises(ProviderNotFoundError):
        await ingest_season(db_session, provider, "1396", 1)


@pytest.mark.asyncio
async def test_ingest_season_creates_episodes_with_credits_and_stills(db_session: AsyncSession):
    provider = FakeTMDbSeriesProvider(FAKE_SERIES, FAKE_SEASON)

    await ingest_series(db_session, provider, "1396")
    await db_session.flush()

    season_id = await ingest_season(db_session, provider, "1396", 1)
    await db_session.commit()

    episodes = (
        (await db_session.execute(select(Episode).where(Episode.season_id == season_id)))
        .scalars()
        .all()
    )
    assert len(episodes) == 2
    pilot = next(e for e in episodes if e.episode_number == 1)
    assert pilot.title == "Pilot"
    assert pilot.runtime_minutes == 58


@pytest.mark.asyncio
async def test_ingest_season_is_idempotent(db_session: AsyncSession):
    provider = FakeTMDbSeriesProvider(FAKE_SERIES, FAKE_SEASON)

    await ingest_series(db_session, provider, "1396")
    await db_session.flush()

    first_season_id = await ingest_season(db_session, provider, "1396", 1)
    await db_session.flush()
    second_season_id = await ingest_season(db_session, provider, "1396", 1)
    await db_session.commit()

    assert first_season_id == second_season_id
    episodes = (
        (await db_session.execute(select(Episode).where(Episode.season_id == first_season_id)))
        .scalars()
        .all()
    )
    # Re-running must not duplicate episode rows.
    assert len(episodes) == 2