from fastapi import APIRouter, HTTPException
from pydantic import BaseModel

from api.db.section import create_section, delete_section, list_sections


router = APIRouter(prefix="/sections", tags=["sections"])


class SectionIn(BaseModel):
    name: str
    parent_id: int | None = None


class SectionOut(BaseModel):
    id: int
    name: str
    parent_id: int | None
    video_count: int


@router.get("/", response_model=list[SectionOut])
async def list_all():
    return await list_sections()


@router.post("/", response_model=SectionOut)
async def create(body: SectionIn):
    name = body.name.strip()
    if not name:
        raise HTTPException(status_code=400, detail="Section name is empty")
    try:
        s = await create_section(name, body.parent_id)
    except ValueError as e:
        raise HTTPException(status_code=400, detail=str(e))
    return SectionOut(id=s.id, name=s.name, parent_id=s.parent_id, video_count=0)


@router.delete("/{section_id}")
async def delete(section_id: int):
    ok = await delete_section(section_id)
    if not ok:
        raise HTTPException(status_code=404, detail="Section not found")
    return {"ok": True}