import re
import unicodedata


POLIZA_PATTERN = re.compile(r"[A-Z0-9\-]{4,30}")


def normalize_text(value: str) -> str:
    return " ".join((value or "").strip().split())


def normalize_for_search(value: str) -> str:
    base = normalize_text(value).casefold()
    return "".join(
        ch for ch in unicodedata.normalize("NFD", base)
        if unicodedata.category(ch) != "Mn"
    )


def normalize_poliza(value: str) -> str:
    return normalize_text(value).upper()


def is_valid_poliza(value: str) -> bool:
    return bool(POLIZA_PATTERN.fullmatch(value or ""))


def validate_contacto(value: str) -> bool:
    cleaned = normalize_text(value)
    if not cleaned:
        return False
    if "@" in cleaned:
        return bool(re.fullmatch(r"[^@\s]+@[^@\s]+\.[^@\s]+", cleaned))
    return bool(re.fullmatch(r"[\d\s+\-()]{6,}", cleaned))