"""Assembles Keyword API responses from repository data.

Mirrors genre_service.py exactly: keywords have no detail page of their own
-- they only appear embedded in movie/series responses and as entries in
this directory listing, which exists so a client can resolve the Aurora
keyword ids that GET /movies and GET /series accept as a filter."""

from __future__ import annotations

from sqlalchemy.ext.asyncio import AsyncSession

from app.core.ids import aurora_id
from app.repositories import keyword_repository
from app.schemas.common import KeywordListOut, KeywordOut


async def list_keywords(session: AsyncSession, *, page: int, page_size: int) -> KeywordListOut:
    keywords, total = await keyword_repository.list_keywords(
        session, limit=page_size, offset=(page - 1) * page_size
    )
    results = [KeywordOut(id=aurora_id("keyword", str(k.id)), name=k.name) for k in keywords]
    total_pages = (total + page_size - 1) // page_size if total else 0

    return KeywordListOut(
        page=page, page_size=page_size, total_results=total, total_pages=total_pages, results=results
    )