"""Integration tests for GET /api/v1/genres (section 17, additive): a
directory for the `genre` filter GET /movies and GET /series already
accept, which takes an Aurora genre id with no prior way to discover what
those ids are. Mirrors test_collection_browse.py; genres have no
categorical field to filter by and no popularity/date field to sort by,
so there's no filter case and always alphabetical-by-name ordering to
test."""

from __future__ import annotations

import pytest
from sqlalchemy.ext.asyncio import AsyncSession

from app.repositories.reference_repository import get_or_create_genre
from app.services import genre_service

_GENRES = ["Zeta Fiction", "Alpha Comedy", "Mid Drama", "Beta Horror"]


async def _seed_genres(db_session: AsyncSession) -> None:
    for name in _GENRES:
        await get_or_create_genre(db_session, name)
    await db_session.commit()


@pytest.mark.asyncio
async def test_list_genres_defaults_to_alphabetical_by_name(db_session: AsyncSession):
    await _seed_genres(db_session)

    out = await genre_service.list_genres(db_session, page=1, page_size=50)

    assert out.total_results == 4
    assert out.total_pages == 1
    assert [g.name for g in out.results] == [
        "Alpha Comedy",
        "Beta Horror",
        "Mid Drama",
        "Zeta Fiction",
    ]


@pytest.mark.asyncio
async def test_list_genres_paginates(db_session: AsyncSession):
    await _seed_genres(db_session)

    page1 = await genre_service.list_genres(db_session, page=1, page_size=2)
    page2 = await genre_service.list_genres(db_session, page=2, page_size=2)

    assert page1.total_results == 4
    assert page1.total_pages == 2
    assert [g.name for g in page1.results] == ["Alpha Comedy", "Beta Horror"]
    assert [g.name for g in page2.results] == ["Mid Drama", "Zeta Fiction"]


@pytest.mark.asyncio
async def test_list_genres_returns_empty_page_when_none_exist(db_session: AsyncSession):
    out = await genre_service.list_genres(db_session, page=1, page_size=50)

    assert out.results == []
    assert out.total_results == 0
    assert out.total_pages == 0