"""答案解析与结果判定（终端与 Web 共用）。"""

from __future__ import annotations

import re


def extract_final_answer(text: str) -> str:
    match = re.search(r"最终答案[:：]\s*(.+)", text)
    if match:
        return match.group(1).strip()
    lines = [line.strip() for line in text.splitlines() if line.strip()]
    return lines[-1] if lines else "（未识别到最终答案）"


def has_reasoning_steps(text: str) -> bool:
    markers = ("第一步", "第二步", "第三步", "step 1", "Step 1", "推理过程", "对齐小数")
    return any(marker in text for marker in markers)


def is_answer_correct(final_answer: str, expected: str) -> bool:
    numbers = re.findall(r"\d+\.?\d*", expected)
    return all(num in final_answer for num in numbers)