from app.infra.firebase import db

COL = "notes"

def create_note(note: dict):
    ref = db.collection(COL).document(note["note_id"])
    if ref.get().exists:
        raise ValueError(f"Note already exists: {note['note_id']}")
    ref.set(note)


def update_note(note_id: str, data: dict):
    if not data:
        return
    db.collection(COL).document(note_id).update(data)

def get_note(note_id: str):
    doc = db.collection(COL).document(note_id).get()
    return doc.to_dict() if doc.exists else None


def list_notes(folder_id: str | None = None):
    q = db.collection(COL)
    if folder_id:
        q = q.where("folder_id", "==", folder_id)
    return [d.to_dict() for d in q.stream()]