"""# Summary

Parents route handlers — names must match openapi.yaml operationIds.
"""
from fastapi import Request, Response

from interfaces._common import delete_or_404, dump, paginate, read_or_404, svc


async def list_parents(request: Request, limit: int = 20, offset: int = 0) -> dict:
    """List parents (paginated). ``limit=0`` returns all remaining items.

    Args:
        request (Request): Incoming request.
        limit (int): Page size. Defaults to 20.
        offset (int): Items to skip. Defaults to 0.

    Returns:
        dict: ``{"total": int, "items": list[Parent]}``.
    """
    docs = await svc(request, "parent").search({})
    return paginate([dump(d) for d in docs], limit, offset)


async def create_parent(request: Request, body: dict, response: Response) -> dict:
    """Create a parent.

    Args:
        request (Request): Incoming request.
        body (dict): Parent fields (``id`` ignored).
        response (Response): Response object; set to 201 on success.

    Returns:
        dict: The created parent.
    """
    response.status_code = 201
    body.pop("id", None)
    doc = await svc(request, "parent").create(body)
    return dump(doc)


async def get_parent(request: Request, id: int) -> dict:
    """Fetch one parent by id.

    Args:
        request (Request): Incoming request.
        id (int): Parent identifier.

    Returns:
        dict: The parent document.

    Raises:
        HTTPException: 404 when the parent does not exist.
    """
    return dump(await read_or_404(svc(request, "parent"), id, "parent"))


async def update_parent(request: Request, id: int, body: dict) -> dict:
    """Replace a parent by id.

    Args:
        request (Request): Incoming request.
        id (int): Parent identifier.
        body (dict): Full replacement payload.

    Returns:
        dict: The updated parent.

    Raises:
        HTTPException: 404 when the parent does not exist.
    """
    await read_or_404(svc(request, "parent"), id, "parent")
    body.pop("id", None)
    doc = await svc(request, "parent").update(id, body)
    return dump(doc)


async def delete_parent(request: Request, id: int, response: Response) -> None:
    """Delete a parent by id.

    Args:
        request (Request): Incoming request.
        id (int): Parent identifier.
        response (Response): Response object; set to 204 on success.

    Raises:
        HTTPException: 404 when the parent does not exist.
    """
    await delete_or_404(svc(request, "parent"), id, "parent")
    response.status_code = 204