from sqlalchemy.ext.asyncio import AsyncSession
from sqlalchemy import select
from app.models.section import ContentSection


async def get_section(db: AsyncSession, key: str) -> dict | None:
    result = await db.execute(select(ContentSection).where(ContentSection.key == key))
    row = result.scalar_one_or_none()
    return row.data if row else None


async def upsert_section(db: AsyncSession, key: str, data: dict) -> ContentSection:
    result = await db.execute(select(ContentSection).where(ContentSection.key == key))
    row = result.scalar_one_or_none()
    if row:
        row.data = data
    else:
        row = ContentSection(key=key, data=data)
        db.add(row)
    await db.flush()
    return row


async def list_sections(db: AsyncSession) -> list[dict]:
    result = await db.execute(select(ContentSection).order_by(ContentSection.key))
    return [{"key": r.key, "updated_at": r.updated_at.isoformat()} for r in result.scalars()]