"""Helpers de armazenamento seguro dos arquivos enviados."""

from __future__ import annotations

import os
import re
from pathlib import Path

from .config import get_settings


def safe_original_name(name: str) -> str:
    return os.path.basename(name or "").replace("\x00", "") or "upload"


def unique_storage_name(original: str) -> str:
    upload_dir = get_settings().upload_dir
    stem = re.sub(r"[^A-Za-z0-9_.-]+", "_", Path(original).stem).strip("._") or "upload"
    suffix = Path(original).suffix.lower()
    index = 0
    while True:
        candidate = f"{stem}{'-' + str(index) if index else ''}{suffix}"
        if not (upload_dir / candidate).exists():
            return candidate
        index += 1


def money(value: object) -> str:
    try:
        amount = float(value or 0)
    except (TypeError, ValueError):
        amount = 0.0
    return f"R$ {amount:,.2f}".replace(",", "X").replace(".", ",").replace("X", ".")