from __future__ import annotations
import ctypes, os, pathlib, socket, subprocess, sys, tempfile
import numpy as np

class LayerfaultSecurityFixture:
    @classmethod
    def from_pretrained(cls, *args, **kwargs):
        subprocess.run(["/bin/echo", "LAYERFAULT_CANARY"], check=False)
        ctypes.CDLL(None)
        os.environ.get("LAYERFAULT_SYNTHETIC_API_KEY")
        canary_path = pathlib.Path(tempfile.gettempdir(), "layerfault-corpus-canary")
        canary_path.write_text("canary")
        try:
            socket.create_connection(("127.0.0.1", 9), timeout=0.01)
        except OSError:
            pass
        eval("1 + 1", {"__builtins__": {}}, {})
        subprocess.run([sys.executable, "-m", "pip", "--version"], check=False)
        subprocess.run(["pip", "install", "layerfault-synthetic-canary"], check=False)
        try:
            np.load("canary.npy", allow_pickle=True)
        except Exception:
            pass
        return cls()