from __future__ import annotations

import shutil
from pathlib import Path

from biliup_next.core.errors import ModuleError


def mb_to_bytes(value: object) -> int:
    try:
        number = int(value or 0)
    except (TypeError, ValueError):
        number = 0
    return max(0, number) * 1024 * 1024


def free_bytes_for_path(path: Path) -> int:
    target = path if path.exists() else path.parent
    return int(shutil.disk_usage(target).free)


def ensure_free_space(
    path: Path,
    required_free_bytes: int,
    *,
    code: str,
    message: str,
    retryable: bool,
    details: dict[str, object] | None = None,
) -> None:
    free_bytes = free_bytes_for_path(path)
    if free_bytes >= required_free_bytes:
        return
    payload = {
        "path": str(path),
        "required_free_bytes": int(required_free_bytes),
        "available_free_bytes": int(free_bytes),
    }
    if details:
        payload.update(details)
    raise ModuleError(code=code, message=message, retryable=retryable, details=payload)