"""Validate JSON without inventing facts or repairing values from benchmark gold."""
import json
import re
from typing import Literal
from pydantic import BaseModel, ConfigDict


class Claim(BaseModel):
    model_config = ConfigDict(extra='forbid', strict=True)
    person: str
    title: str | None = None
    year: int | None = None
    start_year: int | None = None
    keyword: str | None = None
    category: str | None = None
    document_author: str | None = None


class Answer(BaseModel):
    model_config = ConfigDict(extra='forbid', strict=True)
    answer: str
    status: Literal['ok','no_answer','ambiguous','error']
    claims: list[Claim]
    source_urls: list[str]
    count: int | None = None


def parse_answer(text: str) -> tuple[dict, bool]:
    try:
        data=json.loads(text.strip())
        normalized=False
    except json.JSONDecodeError:
        # Exactly one complete JSON fence can be unwrapped. Never replace quotes,
        # append missing braces, extract fragments or silently alter assertions.
        blocks=re.findall(r'```(?:json)?\s*\n([\s\S]*?)```',text,flags=re.IGNORECASE)
        if len(blocks)!=1:
            raise
        data=json.loads(blocks[0].strip())
        normalized=True
    parsed=Answer.model_validate(data)
    return parsed.model_dump(exclude_none=True),normalized