from duckduckgo_search import DDGS
import subprocess
import shlex
import math

def web_search(query: str, max_results: int = 5) -> list[dict]:
    out = []
    with DDGS() as ddgs:
        for r in ddgs.text(query, max_results=max_results):
            out.append({"title": r.get("title"), "url": r.get("href"), "snippet": r.get("body")})
    return out

def electronics_ohm(V: float | None, I: float | None, R: float | None) -> dict:
    # résout V=I*R si une variable est None
    if [V, I, R].count(None) != 1:
        return {"error": "Donne exactement 2 valeurs (ex: V et R) et laisse l’autre à null."}
    if V is None:
        return {"V": I * R}
    if I is None:
        return {"I": V / R}
    return {"R": V / I}

SAFE_COMMANDS = {"git", "docker", "docker-compose", "python", "pip", "ls", "cat", "grep", "tail", "journalctl"}

def run_command(cmd: str) -> dict:
    # garde-fou minimal : n’autorise que certaines commandes
    parts = shlex.split(cmd)
    if not parts:
        return {"error": "Commande vide."}
    if parts[0] not in SAFE_COMMANDS:
        return {"error": f"Commande interdite: {parts[0]} (liste: {sorted(SAFE_COMMANDS)})"}
    try:
        p = subprocess.run(parts, capture_output=True, text=True, timeout=25)
        return {"returncode": p.returncode, "stdout": p.stdout[-4000:], "stderr": p.stderr[-4000:]}
    except Exception as e:
        return {"error": str(e)}