"""admin/routers/qa.py — Custom Q&A training data routes.

Routes:
  GET    /{slug}/qa
  POST   /{slug}/qa
  POST   /{slug}/qa/import
  GET    /{slug}/qa/export
  PUT    /{slug}/qa/{qa_id}
  DELETE /{slug}/qa/{qa_id}
"""

from fastapi import APIRouter, Depends, File, UploadFile
from sqlalchemy.ext.asyncio import AsyncSession

from app.dependencies import get_db, get_current_author_scoped
from app.schemas.admin import QACreateRequest, QAUpdateRequest
from app.services.qa_service import QAService

router = APIRouter()


@router.get("/{author_slug}/qa")
async def list_qa(
    author_slug: str,
    book_id: str | None = None,
    current_user=Depends(get_current_author_scoped),
    db: AsyncSession = Depends(get_db),
):
    """List all custom Q&A pairs for the author."""
    return await QAService(db).list_qa(current_user.id, book_id)


@router.post("/{author_slug}/qa", status_code=201)
async def create_qa(
    author_slug: str,
    body: QACreateRequest,
    current_user=Depends(get_current_author_scoped),
    db: AsyncSession = Depends(get_db),
):
    """Create a new custom Q&A pair. R-029: Validated via Pydantic schema."""
    return await QAService(db).create_qa(current_user.id, body)


@router.post("/{author_slug}/qa/import")
async def import_qa_csv(
    author_slug: str,
    current_user=Depends(get_current_author_scoped),
    db: AsyncSession = Depends(get_db),
    file: UploadFile = File(...),
):
    """Bulk import Q&A pairs from CSV (columns: question,answer,category,priority)."""
    return await QAService(db).import_qa_csv(current_user.id, file)


@router.get("/{author_slug}/qa/export")
async def export_qa_csv(
    author_slug: str,
    current_user=Depends(get_current_author_scoped),
    db: AsyncSession = Depends(get_db),
):
    """Export all Q&A pairs as CSV."""
    return await QAService(db).export_qa_csv(current_user.id)


@router.put("/{author_slug}/qa/{qa_id}")
async def update_qa(
    author_slug: str,
    qa_id: str,
    body: QAUpdateRequest,
    current_user=Depends(get_current_author_scoped),
    db: AsyncSession = Depends(get_db),
):
    """Update an existing Q&A pair. R-029: Validated via Pydantic schema."""
    return await QAService(db).update_qa(current_user.id, qa_id, body)


@router.delete("/{author_slug}/qa/{qa_id}")
async def delete_qa(
    author_slug: str,
    qa_id: str,
    current_user=Depends(get_current_author_scoped),
    db: AsyncSession = Depends(get_db),
):
    """Delete a Q&A pair."""
    return await QAService(db).delete_qa(current_user.id, qa_id)