# core/backup.py

import os
import shutil
from core.paths import get_project_root


def move_to_backup(path):
    """Mueve un archivo al directorio centralizado /backup sin sobrescribir."""
    from core.collision import safe_backup_name
    root = get_project_root()
    backup_dir = os.path.join(root, "backup")
    os.makedirs(backup_dir, exist_ok=True)

    target = safe_backup_name(path)
    shutil.move(path, target)
    return target