"""
Command parsing helpers.
"""

import re

_STOP_WORDS_STRICT = {
    "стоп",
    "хватит",
    "перестань",
    "замолчи",
    "прекрати",
    "тихо",
    "stop",
}

_STOP_PATTERNS_LENIENT = [
    r"\bстоп\w*\b",
    r"\bstop\b",
    r"\bхватит\b",
    r"\bперестан\w*\b",
    r"\bпрекрат\w*\b",
    r"\bзамолч\w*\b",
    r"\bтише\b",
    r"\bтихо\b",
    r"\bвыключ\w*\b",
    r"\bотключ\w*\b",
    r"\bостанов\w*\b",
    r"\bотмен\w*\b",
    r"\bпауза\b",
    r"\bдостаточно\b",
]
_STOP_PATTERNS_LENIENT_COMPILED = [re.compile(p) for p in _STOP_PATTERNS_LENIENT]


def _normalize_text(text: str) -> str:
    text = text.lower().replace("ё", "е")
    text = re.sub(r"[^\w\s]+", " ", text, flags=re.UNICODE)
    text = re.sub(r"\s+", " ", text, flags=re.UNICODE).strip()
    return text


def is_stop_command(text: str, mode: str = "strict") -> bool:
    """
    Detect stop commands in text.

    mode:
        - "strict": only exact stop words.
        - "lenient": broader patterns for noisy recognition.
    """
    if not text:
        return False

    normalized = _normalize_text(text)
    if not normalized:
        return False

    if mode == "strict":
        words = normalized.split()
        return any(word in _STOP_WORDS_STRICT for word in words)

    for pattern in _STOP_PATTERNS_LENIENT_COMPILED:
        if pattern.search(normalized):
            return True

    return False