"""Deduplicate server-owned notices without removing factual qualifications."""
from tools.answers.context_policy import normalized

LIMIT_NOTICE='Zobrazený je obmedzený výber podkladov. Otázku môžeš zúžiť na osobu, prácu, obdobie alebo konkrétnu oblasť.'
LIMIT_PREFIXES=('prechod grafom dosiahol limit vyberu','zobrazene su priklady z obmedzeneho vyberu',
                'zobrazeny je vyber podkladov','zobrazeny je obmedzeny vyber')


def unique_notices(notes):
    result=[];seen=set()
    for note in notes:
        note=note.strip()
        if normalized(note).startswith(LIMIT_PREFIXES):note=LIMIT_NOTICE
        key=normalized(note)
        if key and key not in seen:result.append(note);seen.add(key)
    return result


def clean_answer_notices(result):
    if not isinstance(result.get('answer'),str):return result
    paragraphs=result['answer'].split('\n\n')
    # Only standalone, known server notices are interchangeable. Literal quotes,
    # source content, negations, and specific missing-person notes stay intact.
    kept=[];limit_seen=False
    for paragraph in paragraphs:
        if normalized(paragraph).startswith(LIMIT_PREFIXES) and not paragraph.startswith(('-','*','>')):
            if limit_seen:continue
            paragraph=LIMIT_NOTICE;limit_seen=True
        kept.append(paragraph)
    notes=unique_notices(result.get('presentation_notes',[]))
    return {**result,'answer':'\n\n'.join(kept),**({'presentation_notes':notes} if 'presentation_notes' in result else {})}