"""Integration tests for GET /api/v1/collections (browse/discover, section
17 -- additive beyond the spec's minimum endpoint list): pagination against
real PostgreSQL, exercised through collection_service.list_collections
directly. Mirrors test_company_browse.py; collections 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.provider_repository import get_or_create_provider
from app.repositories.reference_repository import get_or_create_collection
from app.services import collection_service

_COLLECTIONS = [
    ("3001", "Zeta Trilogy"),
    ("3002", "Alpha Saga"),
    ("3003", "Mid Collection"),
    ("3004", "Beta Universe"),
]


async def _seed_collections(db_session: AsyncSession) -> None:
    provider = await get_or_create_provider(db_session, "tmdb", "TMDB")
    for external_id, name in _COLLECTIONS:
        await get_or_create_collection(
            db_session, provider_id=provider.id, external_id=external_id, name=name
        )
    await db_session.commit()


@pytest.mark.asyncio
async def test_list_collections_defaults_to_alphabetical_by_name(db_session: AsyncSession):
    await _seed_collections(db_session)

    out = await collection_service.list_collections(db_session, page=1, page_size=20)

    assert out.total_results == 4
    assert out.total_pages == 1
    assert [c.name for c in out.results] == [
        "Alpha Saga",
        "Beta Universe",
        "Mid Collection",
        "Zeta Trilogy",
    ]


@pytest.mark.asyncio
async def test_list_collections_paginates(db_session: AsyncSession):
    await _seed_collections(db_session)

    page1 = await collection_service.list_collections(db_session, page=1, page_size=2)
    page2 = await collection_service.list_collections(db_session, page=2, page_size=2)

    assert page1.total_results == 4
    assert page1.total_pages == 2
    assert [c.name for c in page1.results] == ["Alpha Saga", "Beta Universe"]
    assert [c.name for c in page2.results] == ["Mid Collection", "Zeta Trilogy"]


@pytest.mark.asyncio
async def test_list_collections_returns_empty_page_when_none_exist(db_session: AsyncSession):
    out = await collection_service.list_collections(db_session, page=1, page_size=20)

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