from fastapi import APIRouter, HTTPException
from pydantic import BaseModel
from typing import Optional
from app.services.note_store import get_note, update_note
from app.utils.time import now_ts


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

class UpdateNoteRequest(BaseModel):
    folder_id: Optional[str] = None
    title: Optional[str] = None

@router.patch("/{note_id}")
def update_note_api(note_id: str, req: UpdateNoteRequest):
    note = get_note(note_id)
    if not note:
        raise HTTPException(status_code=404, detail="Note not found")

    updates = req.dict(exclude_unset=True)

    if not updates:
        return {"note_id": note_id, "updated": False}

    updates["updated_at"] = now_ts()

    update_note(note_id, updates)

    return {
        "note_id": note_id,
        "updated": True,
        "fields": list(updates.keys()),
    }